The rotary joints daily maintenance knowledge
1, with a note oil device please note oil regularly, ensure the rotating joint bearing reliability of operation.
2, it is strictly prohibited to foreign body in rotary joints internal.
3, should maintain the coaxial rotary joint roller and pipe internal clean. Should pay special attention to the new equipment and, when necessary, needing filters to avoid foreign bodies to the rotating joint results in unusual wear.
4, circulation hot body medium temperature should be gradually born rotating joint, avoid JiBian temperature.
5, rotary joints don't long idle.
6, rotary joints should be gentle with, forbidden by the shock, in order to avoid loss connector components.
7 for the machine is not used for a long period, and can lead to the rotating joint scaling up of internal and rust, please pay attention to fiber optical rotary joints such as to use a card to die or the circumstances of the dripping happen.
8, check the sealing surface wear conditions and thickness changes (generally for 5-to normal wear 10mm); observe the sealing surface friction track, see if appear intermittently, scoring three or problems, such as a condition of, should be replaced immediately.
2012年7月31日星期二
2012年7月30日星期一
"Four trillion" is a legacy
In order to Rotary joint deal with the financial crisis of the global economy caused serious impact, the world has launched a series of economic stimulus plan. Chinese authorities in 2008 January launched a $four trillion economic stimulus plan. Then, each district authorities also issued their investment planning. According to Rotary union the plans of the investment of has issued two four provinces and cities statistics, the total amount of investment plans for close to 20 trillion yuan, including most of the project is based on transportation infrastructure for the main investment direction. The central and local authorities large areas of the fixed assets investment planning, although the export and private investment to supplement the growth of landslides gap, but there is also overdrawn the future economic growth and diminishing marginal benefit such negative factors.
Should say, four trillion yuan investment planning in two or three years to through bore slip rings equipment the stimulating effect of the market is very obvious. Machinery industry in 2010 and in the first half of 2011 on strong growth momentum. In engineering machinery, excavator hot even reached about the extent of the disorder. In this context, and is mainly used for traffic around the excavator infrastructure construction of shield equipment investment stimulated abnormalities, each wave funds, although there is no lack of among them no coherent industry the background. For now, the production capacity of the situation of collecting excavator has high too difficult to accurately the extent of the statistics, perhaps, can meet the global market need is just a low limit.
2012年7月27日星期五
The rotating joint: rotation mechanics
Particles in some point in to slip ring the right on the circumference of the radius of r sports, namely its trajectory is bound movement called "circle". It is one of the most common curve motion. For example motor rotor and wheels, pulley, etc are circular motion. In circular motion, the most common and most simple is uniform circular motion.
The characteristics of uniform circular motion: track is round, angular velocity, cycle, the size of the linear velocity and acceleration to heart the size of the same. The line definition: the particle motion through the arc length S and the amount of time the ratio of the t. Linear velocity of the physical meaning: describe particles along the circumference of the movement and screw is vector. The definition of angular velocity: the radius in a certain time of the NaZhuan angle and the ratio of the time. The definition of cycle: more uniformly and in a circular motion of the object, turned the week of the amount of time. Circular motion Any objects in a circle for the need when a centripetal force, as it continues to revolving joint change speed. The speed of the same objects sizes, but the direction has been changed. Only the size of the right to maintain the centripetal force objects in double path movement. The acceleration (speed is a vector, change the direction at the same time cannot change the size) is provided by centrifugal force, if do not have the conditions, the objects will be from round orbit. Objects in circular motion the speed when the tangent direction in a circular path. The direction of the force has been pointing to the right. That is to change the direction of the speed. Now, the centripetal force any object not from orbit. A good example is gravity.
The ground gravity to satellite necessary force along the track in the game. Now backs to Rotary union the physics up. The object of the centripetal force and speed and its quality and square radius is proportional to the countdown: F = (mc ^ 2) / r, F = mw ^ 2 r (w is angular velocity) So if we know the force size, quality, radius, we can calculate object rotation speed. If we know the speed, quality, radius, we can calculate the output size. Symbols are recorded as the following: F = ma Yes, Force = Mass multiplied by acceleration. So: Yes, speed = quality times Acceleration A = (v ^ 2) / r Quality symbol-by removing F and may be replaced. You don't have to know that the mass of the object, isn't it?
The characteristics of uniform circular motion: track is round, angular velocity, cycle, the size of the linear velocity and acceleration to heart the size of the same. The line definition: the particle motion through the arc length S and the amount of time the ratio of the t. Linear velocity of the physical meaning: describe particles along the circumference of the movement and screw is vector. The definition of angular velocity: the radius in a certain time of the NaZhuan angle and the ratio of the time. The definition of cycle: more uniformly and in a circular motion of the object, turned the week of the amount of time. Circular motion Any objects in a circle for the need when a centripetal force, as it continues to revolving joint change speed. The speed of the same objects sizes, but the direction has been changed. Only the size of the right to maintain the centripetal force objects in double path movement. The acceleration (speed is a vector, change the direction at the same time cannot change the size) is provided by centrifugal force, if do not have the conditions, the objects will be from round orbit. Objects in circular motion the speed when the tangent direction in a circular path. The direction of the force has been pointing to the right. That is to change the direction of the speed. Now, the centripetal force any object not from orbit. A good example is gravity.
The ground gravity to satellite necessary force along the track in the game. Now backs to Rotary union the physics up. The object of the centripetal force and speed and its quality and square radius is proportional to the countdown: F = (mc ^ 2) / r, F = mw ^ 2 r (w is angular velocity) So if we know the force size, quality, radius, we can calculate object rotation speed. If we know the speed, quality, radius, we can calculate the output size. Symbols are recorded as the following: F = ma Yes, Force = Mass multiplied by acceleration. So: Yes, speed = quality times Acceleration A = (v ^ 2) / r Quality symbol-by removing F and may be replaced. You don't have to know that the mass of the object, isn't it?
2012年7月25日星期三
The rotating joint: mechanical seals use common sense
A mechanical seal, the selection method
Mechanical seal according to working conditions and different nature of medium, high temperature resistant, good low temperature resistance mechanical seal, resistance to high pressure, corrosion resistance of mechanical seal, resistance to particulate medium mechanical seal and adapt to slip rings the light hydrocarbon vapors to the medium of the mechanical seal, should according to different use choosing different structure and material of mechanical seal.
The selection of main parameters is: seal chamber body pressure (MPA), fluid temperature (), working speed (M/S), the characteristics of fluid and installation of the seal of effective space, etc. The selection of basic principle for the:
1. According to seal chamber body pressure, determine the sealing structure with balancing or not balance type, single or double end face, etc.
2. According to the speed of work, make sure the rotary or motionless, the fluid dynamic pressure type or non-contact.
3. According to temperature and fluid properties, determine the friction pair and assisting sealing materials, and choose the correct lubrication, washing, heat preservation, cooling mechanical seal circulation protection system, etc.
4. According to the installation of the seal of effective space, make sure the spring or a single spring or waveform spring, loading or within the loading. Second, mechanical seal the installation and operation requirements 1 and mechanical seal to through bore slip rings the machine precision requirements (to pump with mechanical seal for example)
(1) installation mechanical seal parts of the axis (or are) the biggest radial beat tolerance not more than 0.04 ~ 0.06 MM.
(2) the rotor shaft to channel not more than 0.3mm moving.
(3) seal chamber body and cover with the positioning of the sealing face axis (or are) the biggest surface beat tolerance not more than 0.04 ~ 0.06 MM. 2, seal confirmation
(1) to confirm that the installation of the seal and requirements of the model are consistent.
(2) carefully before installation and assembly figure controls, the number of parts is all ready.
(3) the adoption and circle the spring drives mechanical seal. The spring has left, dextral cent, must accord to the spin axis have choice.
3, installation Installation method with mechanical seal type, different kinds of machines and somewhat different, but the installation bring are nearly identical, the installation process and pay attention to the following matters:
(1) to determine the size of the installation When installation should be according to the use of the product manual or sample, and ensure the installation of mechanical seal size.
(2) in front axle (collar), gland should be no burr, bearing in good condition; Seal, shaft, seal chamber, gland should be cleaned clean. To reduce friction resistance, shaft installation mechanical seal to Mercury Slip Rings the parts of the thing to coat with oil, for lubrication, considering the rubber o-ring XiangRongXing of, if not oil, can besmear soap water. Float loading static ring with the structure of the not presenting, unfavorable with oil, should be dry in the gland.
(3) to ring and static pressure covers on the shaft together. Take care not to and shaft together, and then will move ring component load. Spring seat or drives a tight set screw within a few times evenly on tight. Not fixed before gland, and on compensation for axial compression ring, loosen the compensation can automatically return after ring without card lag phenomenon, then will gland to screw evenly lock.
The selection of main parameters is: seal chamber body pressure (MPA), fluid temperature (), working speed (M/S), the characteristics of fluid and installation of the seal of effective space, etc. The selection of basic principle for the:
1. According to seal chamber body pressure, determine the sealing structure with balancing or not balance type, single or double end face, etc.
2. According to the speed of work, make sure the rotary or motionless, the fluid dynamic pressure type or non-contact.
3. According to temperature and fluid properties, determine the friction pair and assisting sealing materials, and choose the correct lubrication, washing, heat preservation, cooling mechanical seal circulation protection system, etc.
4. According to the installation of the seal of effective space, make sure the spring or a single spring or waveform spring, loading or within the loading. Second, mechanical seal the installation and operation requirements 1 and mechanical seal to through bore slip rings the machine precision requirements (to pump with mechanical seal for example)
(1) installation mechanical seal parts of the axis (or are) the biggest radial beat tolerance not more than 0.04 ~ 0.06 MM.
(2) the rotor shaft to channel not more than 0.3mm moving.
(3) seal chamber body and cover with the positioning of the sealing face axis (or are) the biggest surface beat tolerance not more than 0.04 ~ 0.06 MM. 2, seal confirmation
(1) to confirm that the installation of the seal and requirements of the model are consistent.
(2) carefully before installation and assembly figure controls, the number of parts is all ready.
(3) the adoption and circle the spring drives mechanical seal. The spring has left, dextral cent, must accord to the spin axis have choice.
3, installation Installation method with mechanical seal type, different kinds of machines and somewhat different, but the installation bring are nearly identical, the installation process and pay attention to the following matters:
(1) to determine the size of the installation When installation should be according to the use of the product manual or sample, and ensure the installation of mechanical seal size.
(2) in front axle (collar), gland should be no burr, bearing in good condition; Seal, shaft, seal chamber, gland should be cleaned clean. To reduce friction resistance, shaft installation mechanical seal to Mercury Slip Rings the parts of the thing to coat with oil, for lubrication, considering the rubber o-ring XiangRongXing of, if not oil, can besmear soap water. Float loading static ring with the structure of the not presenting, unfavorable with oil, should be dry in the gland.
(3) to ring and static pressure covers on the shaft together. Take care not to and shaft together, and then will move ring component load. Spring seat or drives a tight set screw within a few times evenly on tight. Not fixed before gland, and on compensation for axial compression ring, loosen the compensation can automatically return after ring without card lag phenomenon, then will gland to screw evenly lock.
2012年7月24日星期二
High-pressure rotary joints: mechanical seal to prevent leakage of liquid pump is key
1. Access between the sealing surface; 2. Rotating surface and spindle access between the; 3. Fixed surface and gland access between the; 4. Gland and access between the packing box. The latter two leakage pathways general use of the static seal, between two parts because there is no relative movement. This part of the seal is usually called three seal, its sealing material for gaskets or and process flow liquid adaptation of the type O sealing ring. In older seal design, is located in the rotation of the second sealing face with a space, can be in the spindle before and after exercise, so easy to ring slip cause wear and premature failure. However, in a new seal design, the second sealing dormant, so it can avoid the spindle wear to appear on corrosion problems.
In the normal operation of the pump, rotating face and still face for packing box of the fluid in between the pressure produced and to keep it in sealed condition, in the start and stop, packing box pressure produced by the spring pressure of maintaining (can be even by the spring pressure to replace).
Most of the mechanical seal design are a soft material to make rotation face, in the harder still face rotating friction. For many years, the most common is to use carbon materials as a combination of rotating face, in the ceramic still face operation. This kind of material is still widely used, but still face chooses stainless steel or more hard material production, such as tungsten carbide or silicon carbide. No matter what the material, in short in response to a layer of liquid between must keep thin film to Mercury Slip Rings lubricate role. However, in the packing box, the usual spring load and the way of the combination of the liquid pressure, can make between sealing plays very good sealing function. But the sealed pressure is too high, can affect formed between liquid film interface, resulting in increased and premature wear of the heat.
If sealing pressure is too low, the interface of the gap between increases, easy to cause the liquid leakage. Seal factory continues to revolving joint efforts to improve the surface straightness. They adopt special throw ground reflex. Then, using monochromatic light source the detection of grating slabs. From this point of view, the seal surface must be careful treatment, and strictly according to the installation instructions. Guarantee seal face gets proper protection and correction in place. This is very important
Most of the mechanical seal design are a soft material to make rotation face, in the harder still face rotating friction. For many years, the most common is to use carbon materials as a combination of rotating face, in the ceramic still face operation. This kind of material is still widely used, but still face chooses stainless steel or more hard material production, such as tungsten carbide or silicon carbide. No matter what the material, in short in response to a layer of liquid between must keep thin film to Mercury Slip Rings lubricate role. However, in the packing box, the usual spring load and the way of the combination of the liquid pressure, can make between sealing plays very good sealing function. But the sealed pressure is too high, can affect formed between liquid film interface, resulting in increased and premature wear of the heat.
If sealing pressure is too low, the interface of the gap between increases, easy to cause the liquid leakage. Seal factory continues to revolving joint efforts to improve the surface straightness. They adopt special throw ground reflex. Then, using monochromatic light source the detection of grating slabs. From this point of view, the seal surface must be careful treatment, and strictly according to the installation instructions. Guarantee seal face gets proper protection and correction in place. This is very important
2012年7月23日星期一
The rotating joint the development process and history, design the update
1933 years ago, the post-cooling water or steam medium rotation HongGang is usually used packing gland to seal, the facts prove the efficiency is not high. These sealing material wears, the more the medium leaking badly.
In August 1933, Monroe and Goff and a local factory joint, design and manufacture the first keg up the ring slip Johnson. It has solved the problem of packing gland, adopted a more economical way to let water or steam access to HongGang. Spring type mechanical seal effectively prevents the liquid or gas medium leakage. The mechanical joint rotating seal of the key lies in the ring.
It allows the joint parts with rotating equipment, and offers a watertight seals let a liquid or gas into the cylinder. In the 1930 s to the s, through the Mercury Slip Rings cylinder to the ventilation with a liquid or gas a preferred way, however, there are some problems with the joint installation. The second world war ii ended, many innovative application in joint design, one of which is to use metal hose, this makes the sealing ring joint with wear mobile is more agile. In 1946, in the original foundation increased the size, to better meet the needs of various industries with rotating joint. In 1954, a new design was underway, main is to reduce the appearance of joint size to better adapt to special needs, to 1957, in an industry also care about how to improve the efficiency of the cylinder block heating and cooling. Ire began planning to study various put Johnson siphon device (rotary and fixed) efficiency, and HongGang from inside to outside heat transfer efficiency of different siphon clearance. In the United States, in 1959, pentacle, Florida, key Johnson company put a 1.5 x 6.35 metres (60 "x 250") paper machine HongGang converted into a company HongGang test, the main test various rotary joints and siphon device. In the United States in 1962 SanHeShi Michigan founded the r&d center, 1963 for the first time key Johnson recorded rotary joints rotate in napping pm3 &pm4 operation.
The design and operation of the rotating HongGang people, can learn a lot from the video of steam condensate rate of knowledge. In the industry, revolving joint and many of the siphon technique to share in the industry. Through the 50 s and 60 s, researchers continue to develop new designed to meet the needs of many industrial application. Higher temperature and speed requirements, the requirements of the rotating joint design further optimization. Such as quick change outer pipe, pressure compensator, large size joints, joint service life extension. In the 1960 s and early 70 s, all kinds of new sealing material to the test, such as plastic, Teflon, ceramic. Today, there are millions of rotary joints: from supporting type or the supporting type; Single and Double general general; applicable medium has steam, heat conduction oil, water, cooling water, air and some special heat transfer liquid. From a very low temperature to be as much as 482 C (900 F); Speed from 1 to 50000 turn/turn/points.
It allows the joint parts with rotating equipment, and offers a watertight seals let a liquid or gas into the cylinder. In the 1930 s to the s, through the Mercury Slip Rings cylinder to the ventilation with a liquid or gas a preferred way, however, there are some problems with the joint installation. The second world war ii ended, many innovative application in joint design, one of which is to use metal hose, this makes the sealing ring joint with wear mobile is more agile. In 1946, in the original foundation increased the size, to better meet the needs of various industries with rotating joint. In 1954, a new design was underway, main is to reduce the appearance of joint size to better adapt to special needs, to 1957, in an industry also care about how to improve the efficiency of the cylinder block heating and cooling. Ire began planning to study various put Johnson siphon device (rotary and fixed) efficiency, and HongGang from inside to outside heat transfer efficiency of different siphon clearance. In the United States, in 1959, pentacle, Florida, key Johnson company put a 1.5 x 6.35 metres (60 "x 250") paper machine HongGang converted into a company HongGang test, the main test various rotary joints and siphon device. In the United States in 1962 SanHeShi Michigan founded the r&d center, 1963 for the first time key Johnson recorded rotary joints rotate in napping pm3 &pm4 operation.
The design and operation of the rotating HongGang people, can learn a lot from the video of steam condensate rate of knowledge. In the industry, revolving joint and many of the siphon technique to share in the industry. Through the 50 s and 60 s, researchers continue to develop new designed to meet the needs of many industrial application. Higher temperature and speed requirements, the requirements of the rotating joint design further optimization. Such as quick change outer pipe, pressure compensator, large size joints, joint service life extension. In the 1960 s and early 70 s, all kinds of new sealing material to the test, such as plastic, Teflon, ceramic. Today, there are millions of rotary joints: from supporting type or the supporting type; Single and Double general general; applicable medium has steam, heat conduction oil, water, cooling water, air and some special heat transfer liquid. From a very low temperature to be as much as 482 C (900 F); Speed from 1 to 50000 turn/turn/points.
2012年7月20日星期五
Second, the strict control of raw materials entering the factory
Qualified supplier evaluation from raw material purchasing, not everything is all right. Qualified suppliers, only show that the supplier has the quality is relatively stable to provide basic conditions of raw materials, the actual delivery of the number of raw materials whether there are shortages, whether can satisfy the production quality requirements, not sure yet. Therefore, the raw material into the factory before, still should strictly accord the following requirements to the factory quality.
1. No inspection of raw materials to ring slip acceptance. Shall be based on raw materials procurement contract, go with the peer "certificate", "material book" and so on the quality certificate confirm the material; For individual low-valued consumables and shall provide corresponding to the quality certificate ", "material book", must advance for samples. For without the certificate ", "material look of the raw material, should refuse to accept it, inventory.
2. The inspection of raw material inspection qualified by the Treasury. Inspection of raw materials to Mercury Slip Rings the storage, purchasing department should fill in the inspection of records/professional inspection department, professional inspection department of inspection report issued by qualified after the report by qualified Treasury. Such as the inspection qualified, should be well the nonconforming records of the single fill in, and complete quality information feedback one-way quality department feedback, demand the return/change procedure purchasing department.
3. Timely established after the check incoming inspection records. Trustee shall establish the raw material storage acceptance of records, record including: raw materials name, specification, type, production factory, the lead-time, the quantity, the number of qualified, check and accept, time and the quality of the corresponding proof; And according to the material classes, name, specification put hang JianKa respectively, to prepare for future inquiry, confirmed.
4. For urgent need or that the quality of the material not receives raw materials processing. In urgent need or that the quality of the material not raw material, need to complete information quality feedback one-way quality department feedback, by the quality department to purchase department is not proof materials quality traversing, and the raw material incoming inspection according to through bore slip rings the program, temporary unqualified area, verify the qualified rear can deal with formalities of acceptance.
5. Materials to acceptance of the appearance quality to check whether there is any break the raw materials packaging, defect, see packages for corrosion, leakage, the postal inspection of commodity, grade, specifications, etc, with the product quality certificate, packing list acceptance.
6. Only in the installation and use of exposure to the stage to the internal quality problem, raw materials to build quality GenZongKa dog-carts, keep and productive use of units of the communication, master the first material, do find problems timely feedback, and notify the supply authorities in accordance with regulations processing.
1. No inspection of raw materials to ring slip acceptance. Shall be based on raw materials procurement contract, go with the peer "certificate", "material book" and so on the quality certificate confirm the material; For individual low-valued consumables and shall provide corresponding to the quality certificate ", "material book", must advance for samples. For without the certificate ", "material look of the raw material, should refuse to accept it, inventory.
2. The inspection of raw material inspection qualified by the Treasury. Inspection of raw materials to Mercury Slip Rings the storage, purchasing department should fill in the inspection of records/professional inspection department, professional inspection department of inspection report issued by qualified after the report by qualified Treasury. Such as the inspection qualified, should be well the nonconforming records of the single fill in, and complete quality information feedback one-way quality department feedback, demand the return/change procedure purchasing department.
3. Timely established after the check incoming inspection records. Trustee shall establish the raw material storage acceptance of records, record including: raw materials name, specification, type, production factory, the lead-time, the quantity, the number of qualified, check and accept, time and the quality of the corresponding proof; And according to the material classes, name, specification put hang JianKa respectively, to prepare for future inquiry, confirmed.
4. For urgent need or that the quality of the material not receives raw materials processing. In urgent need or that the quality of the material not raw material, need to complete information quality feedback one-way quality department feedback, by the quality department to purchase department is not proof materials quality traversing, and the raw material incoming inspection according to through bore slip rings the program, temporary unqualified area, verify the qualified rear can deal with formalities of acceptance.
5. Materials to acceptance of the appearance quality to check whether there is any break the raw materials packaging, defect, see packages for corrosion, leakage, the postal inspection of commodity, grade, specifications, etc, with the product quality certificate, packing list acceptance.
6. Only in the installation and use of exposure to the stage to the internal quality problem, raw materials to build quality GenZongKa dog-carts, keep and productive use of units of the communication, master the first material, do find problems timely feedback, and notify the supply authorities in accordance with regulations processing.
2012年7月18日星期三
The mechanical theory as well as in the slip rings in the design of type selection to accurately
For mechanical design engineer for, the most painful way of mechanical structure type selection, only by understanding the slipping the mechanical theory, to the correct selection, so how to correctly and reasonably slipping parts selection? First of all we slip ring from with principle speaking, is to make the role with slipping the static circle and the rotating slipping circle respectively with the installation parts of the static part (usually is a drag) and the rotating part (usually axis) consolidation in together, so as to realize the rotating state in load and limit movement relative to the system still system the basic task of the position. Slipping the important parts are machinery, also can say is the mechanical joints, and we human beings, if no joint that's not good, if not the man joins a paralyzed, what function?
It is no use, mechanical also is same, not the slip rings, mechanical use don't get up and so machinery is cannot leave the slipping, leaving the slip rings cannot live on, so scrap. Use rotation of all kinds of mechanical device, drags instruments such as market strictly on performance requirements for the conditions. The required performance also becoming more diverse. In order to numerous from structure, size, choose the most suitable slip rings, need from all kinds of perspective. In the choice of slipping, general, considered as a shaft of slipping arrangement, installation, remove the ease of degree, slipping the space, allowed by the size and the marketability slip rings, roughly decided to slip rings structure. The use of sloping method is very complex, some rotating slipping needs to cooperate the use is, the general technical personnel to know knowledge, we generally people must be don't know, we here is to introduce some of this rotation with slip-ring use and requirements, but also to you later familiar with revolving joint know rbi basis.
On the shaft and drag a, rotating slipping the requirements in the radial, axial and tangent direction and so on three directions fixed its position. Radial and cut the positioning of slipping through to the contractor in a tight fit realizes, axial location only in a few instances the tight cooperation; general use of the axial spacing parts, such as cover and black circle will axial position limit in clearance range. Second, the comparative study of the use of slipping side of all kinds of mechanical design life and all the different slipping durable limits, side slip rings to size. In the choice of slipping, often only consider slipping tends the fatigue life, grease of aging by happened life, wears away. Grease noise also needs to study fully. However, according to different purposes, the necessary choice of the precision, clearance, keeps the framing structure, grease, etc requirements, particularly of slipping design. Fixed lateral spreads ring, need to choose available in axial rotation surface move (such as via slipping) or to assembly face mobile (such as centripetal ball slipping) slip rings. In short axis, fixed side and freedom without any other side, using only one-way fixed axis move to slip rings (such as wind power slipping). But, the choice and no certain order through bore slip rings , rules, priority should be considered for slipping the required, is conditions, performance, most associated issues, particularly the act. Usually, the shaft is in two slipping radial and axial for support, at this time, will drag on one side of the fixed lateral spreads called ring, it bears radial and axial two kind of load, the fixed axis and slipping between axial box relative displacement effect. The other side will be called free side, only bear radial load, axial can move relative to solve because the temperature change and produce shaft expansion of the topic and the installation slipping interval error. Only very sure of selection, can be rapidly complete mechanical structure design task, so before in design, we as far as possible know more about slipping attention of selection.
It is no use, mechanical also is same, not the slip rings, mechanical use don't get up and so machinery is cannot leave the slipping, leaving the slip rings cannot live on, so scrap. Use rotation of all kinds of mechanical device, drags instruments such as market strictly on performance requirements for the conditions. The required performance also becoming more diverse. In order to numerous from structure, size, choose the most suitable slip rings, need from all kinds of perspective. In the choice of slipping, general, considered as a shaft of slipping arrangement, installation, remove the ease of degree, slipping the space, allowed by the size and the marketability slip rings, roughly decided to slip rings structure. The use of sloping method is very complex, some rotating slipping needs to cooperate the use is, the general technical personnel to know knowledge, we generally people must be don't know, we here is to introduce some of this rotation with slip-ring use and requirements, but also to you later familiar with revolving joint know rbi basis.
On the shaft and drag a, rotating slipping the requirements in the radial, axial and tangent direction and so on three directions fixed its position. Radial and cut the positioning of slipping through to the contractor in a tight fit realizes, axial location only in a few instances the tight cooperation; general use of the axial spacing parts, such as cover and black circle will axial position limit in clearance range. Second, the comparative study of the use of slipping side of all kinds of mechanical design life and all the different slipping durable limits, side slip rings to size. In the choice of slipping, often only consider slipping tends the fatigue life, grease of aging by happened life, wears away. Grease noise also needs to study fully. However, according to different purposes, the necessary choice of the precision, clearance, keeps the framing structure, grease, etc requirements, particularly of slipping design. Fixed lateral spreads ring, need to choose available in axial rotation surface move (such as via slipping) or to assembly face mobile (such as centripetal ball slipping) slip rings. In short axis, fixed side and freedom without any other side, using only one-way fixed axis move to slip rings (such as wind power slipping). But, the choice and no certain order through bore slip rings , rules, priority should be considered for slipping the required, is conditions, performance, most associated issues, particularly the act. Usually, the shaft is in two slipping radial and axial for support, at this time, will drag on one side of the fixed lateral spreads called ring, it bears radial and axial two kind of load, the fixed axis and slipping between axial box relative displacement effect. The other side will be called free side, only bear radial load, axial can move relative to solve because the temperature change and produce shaft expansion of the topic and the installation slipping interval error. Only very sure of selection, can be rapidly complete mechanical structure design task, so before in design, we as far as possible know more about slipping attention of selection.
2012年7月13日星期五
Conducting ring main detection performance index briefly reviewed
In the industrial use,
Miniature Slip Rings mainly plays the role of a rotary joints. What is the performance index for its stable, reliable operation provides a guarantee? Here we conducting ring of some of the main parameters, make simple analysis, including its inspection method, inspection occurred in some abnormal factors and solutions.
Travel conducts conduct ring main product performance inspection for the assembly size shape of inspection, in single contact resistance test, the conductive Capsule Slip Rings in the operation of contact resistance testing, between loop insulation strength, high crushing strength test, turn the friction torque detection. Here, we which turn contact resistance of the fluctuation of the insulation between the loop and intensity of focus. Single contact resistance of fluctuation signal, current directly influence the quality of the transmission and conducting ring operation stability, the test method is put conducting ring into testing instrument, makes conductive slipring running in state, with micro the slightly nationalism to single dynamic resistance measured the fluctuation. Each contact resistance fluctuation should not 10 backhoe Europe, general cause contact resistance fluctuation is mainly due to excessive brush wire and metal ring contact bad, bad reason most is not enough pressure or a foreign body in the interface or because the metal ring deformation caused by factors.
This requires the production process for "five S" on the strict execution; On the other hand to the process of production of, in the installation of brush line pressure adjusting brush line, the pressure don't too much and do not too small, long-term experiment that force is around 10 g is more appropriate, can meet the requirements of the contact resistance, also won't friction too big effect life; And there is the installation of the metal ring aging, let stress get released in full, do not cause ring way deformation. Insulation intensity between loop is to point to in the next to two road use 500 V or 1000 V insulation compression test instrument. If I can't pass the test are the main reasons: the short-circuit, loop between the conductive medium connectivity, or wire line to hurt a short circuit, or processing project of the partial ring cause; And is the decline in insulation, insulation performance declines could be the cause of the material, and may be encapsulating compound happened when crack, holes and other bad, humidity is too big because humidity to enter insulation performance to decline.
Travel conducts conduct ring main product performance inspection for the assembly size shape of inspection, in single contact resistance test, the conductive Capsule Slip Rings in the operation of contact resistance testing, between loop insulation strength, high crushing strength test, turn the friction torque detection. Here, we which turn contact resistance of the fluctuation of the insulation between the loop and intensity of focus. Single contact resistance of fluctuation signal, current directly influence the quality of the transmission and conducting ring operation stability, the test method is put conducting ring into testing instrument, makes conductive slipring running in state, with micro the slightly nationalism to single dynamic resistance measured the fluctuation. Each contact resistance fluctuation should not 10 backhoe Europe, general cause contact resistance fluctuation is mainly due to excessive brush wire and metal ring contact bad, bad reason most is not enough pressure or a foreign body in the interface or because the metal ring deformation caused by factors.
This requires the production process for "five S" on the strict execution; On the other hand to the process of production of, in the installation of brush line pressure adjusting brush line, the pressure don't too much and do not too small, long-term experiment that force is around 10 g is more appropriate, can meet the requirements of the contact resistance, also won't friction too big effect life; And there is the installation of the metal ring aging, let stress get released in full, do not cause ring way deformation. Insulation intensity between loop is to point to in the next to two road use 500 V or 1000 V insulation compression test instrument. If I can't pass the test are the main reasons: the short-circuit, loop between the conductive medium connectivity, or wire line to hurt a short circuit, or processing project of the partial ring cause; And is the decline in insulation, insulation performance declines could be the cause of the material, and may be encapsulating compound happened when crack, holes and other bad, humidity is too big because humidity to enter insulation performance to decline.
2012年7月12日星期四
The rotating joint import and domestic rotary joints contrast
Rotary joints heat conduction oil rotary joints high-speed rotary joints steam rotary joints-following a bond machinery accessories Co., LTD, the news department Special Report: Foreign better than China, this is the irony of...... Some people, always think that foreign what all good than China. This, of course, also some radical. In fact, the developed countries of the many things did more than China. There are some facts we have to admit that. China's industrial start late. And the reform and opening up to now also only thirty years. * In a poem said: "Thirty years in a moment". Also fully explain the short time. When we bring in foreign production equipment and technical data to now have not been fully digested, not fully digest, there is no way to go up in the foundation innovation. Rotary joints. From now on the market to see, import the Miniature Slip Rings did more than domestic ones.
One is with long life. 2 It is a beautiful shape; three are good material. Domestic the rotating joint appearance coarse; Materials General; use short life. Now that knows the reason, why no one to improve it? In fact, the rotating joint manufacturer in China has concern about this problem, are also looking for a solution. Have some reason block the rotary joints quality ascension. One is the people's idea has not changed: Import rotary joints and China rotary joints put together, no matter how quality, appearance how, must think the rotating joint import good; 2 it is domestic good lack of raw materials. Steel and treatment technology to catch up with abroad; three sales price is decided by the Chinese rotary joints of destiny. Europe and the sales price are rotating joint Chinese rotary joints of a few times and even one hundred times. Japan, South Korea is the rotating joint sales price is China the rotating joint of the five times more. Even, the rotating joint sales price is Taiwan's mainland rotary joints three to five times. China has been the rotating joint prices low. In order to reduce costs, for a small amount of money. So can only choose cheap materials, the use of the original and simple processing technology. China Capsule Slip Rings how to go to the world? How to make the product quality and product price connecting with the world? To create the first brand of Chinese the rotating joint key idea the gentiles gives the answer. First introduction and absorption of foreign technology, again research and development and innovation of their products. The most critical part of the rotating joint is sealed effect. How to improve sealing effect and prolong service life?
Ce ignore the gentiles through to the world nearly hundred rotary joints of the manufacturer of the investigation and study found. The best sealing materials to satisfy the rotating joint compressive, wear resistance, resistance to impurities. It is simple but very hard to do. And can meet the rotating joint high temperature and high pressure, high speed material little little. But, not solve this problem to solve three tenors the Chinese rotary joints products quality improvement. Ce ignore the gentiles through of graphite, four fluorine, and silicon carbide, dozens of materials such as repeated contrast test and found the best material is the synthesis of carbon fiber and graphite. Carbon fiber tenacity is the world recognized. Can effectively solve the problem of the seal compression, and carbon fiber was well-known heat resistance, resistance to high temperature all four or five bases can be no question. Graphite lubrication and high temperature resistant is beyond doubt. So, solve the wear-resisting problem solved the problem of high rotation speed. Now find can substitute the carbon fiber synthesis of sealing materials have not. But, the carbon fibre high prices, let a lot of-and stopped. So, want to improve the quality of Chinese rotary joints, the price must go up. That if the price can't go up? Only reduce the cost of product, without lowering the quality of products of the case, only can reduce cost is the office expenses and marketing costs. This makes the network marketing is pushed to the company sales field. Ce ignore the gentiles a lift to go out, walk a few tens of kilometers has no myth. Saving every penny for the customer. After clients, benefit will naturally feedback. Including your reputation, useful effect and so on, so that the advertisement effect of the network TV ads must higher than the news media. Going out, this is China Rotary joint have to face the reality. Stand the test of the world only products, and can only be for an enterprise to bring the large quantity order and profit. Enterprise has development space. Ce ignore the gentiles put forward "and import rotary joints, and domestic than quality rotating joint than the price" slogan. We'll have to wait and see, in the near future. Let the Chinese proud of China of the rotating joint. National brand of connecting spin will stand. For people in rotating seal field bring pride and honor Heat conduction oil rotary joints high-speed rotary joints steam rotary joints hydraulic rotary joints rotary joints manufacturers rotary joints
One is with long life. 2 It is a beautiful shape; three are good material. Domestic the rotating joint appearance coarse; Materials General; use short life. Now that knows the reason, why no one to improve it? In fact, the rotating joint manufacturer in China has concern about this problem, are also looking for a solution. Have some reason block the rotary joints quality ascension. One is the people's idea has not changed: Import rotary joints and China rotary joints put together, no matter how quality, appearance how, must think the rotating joint import good; 2 it is domestic good lack of raw materials. Steel and treatment technology to catch up with abroad; three sales price is decided by the Chinese rotary joints of destiny. Europe and the sales price are rotating joint Chinese rotary joints of a few times and even one hundred times. Japan, South Korea is the rotating joint sales price is China the rotating joint of the five times more. Even, the rotating joint sales price is Taiwan's mainland rotary joints three to five times. China has been the rotating joint prices low. In order to reduce costs, for a small amount of money. So can only choose cheap materials, the use of the original and simple processing technology. China Capsule Slip Rings how to go to the world? How to make the product quality and product price connecting with the world? To create the first brand of Chinese the rotating joint key idea the gentiles gives the answer. First introduction and absorption of foreign technology, again research and development and innovation of their products. The most critical part of the rotating joint is sealed effect. How to improve sealing effect and prolong service life?
Ce ignore the gentiles through to the world nearly hundred rotary joints of the manufacturer of the investigation and study found. The best sealing materials to satisfy the rotating joint compressive, wear resistance, resistance to impurities. It is simple but very hard to do. And can meet the rotating joint high temperature and high pressure, high speed material little little. But, not solve this problem to solve three tenors the Chinese rotary joints products quality improvement. Ce ignore the gentiles through of graphite, four fluorine, and silicon carbide, dozens of materials such as repeated contrast test and found the best material is the synthesis of carbon fiber and graphite. Carbon fiber tenacity is the world recognized. Can effectively solve the problem of the seal compression, and carbon fiber was well-known heat resistance, resistance to high temperature all four or five bases can be no question. Graphite lubrication and high temperature resistant is beyond doubt. So, solve the wear-resisting problem solved the problem of high rotation speed. Now find can substitute the carbon fiber synthesis of sealing materials have not. But, the carbon fibre high prices, let a lot of-and stopped. So, want to improve the quality of Chinese rotary joints, the price must go up. That if the price can't go up? Only reduce the cost of product, without lowering the quality of products of the case, only can reduce cost is the office expenses and marketing costs. This makes the network marketing is pushed to the company sales field. Ce ignore the gentiles a lift to go out, walk a few tens of kilometers has no myth. Saving every penny for the customer. After clients, benefit will naturally feedback. Including your reputation, useful effect and so on, so that the advertisement effect of the network TV ads must higher than the news media. Going out, this is China Rotary joint have to face the reality. Stand the test of the world only products, and can only be for an enterprise to bring the large quantity order and profit. Enterprise has development space. Ce ignore the gentiles put forward "and import rotary joints, and domestic than quality rotating joint than the price" slogan. We'll have to wait and see, in the near future. Let the Chinese proud of China of the rotating joint. National brand of connecting spin will stand. For people in rotating seal field bring pride and honor Heat conduction oil rotary joints high-speed rotary joints steam rotary joints hydraulic rotary joints rotary joints manufacturers rotary joints
2012年7月11日星期三
Conducting ring new product development main steps
The purpose of the new product development is to adapt to the market and lead the market, improve the core competitiveness of the enterprise, seek new profit growth point, to realize the sustainable development of the enterprises. Basically is to use the basic theory research and at home and abroad and time and applied research in reality for a particular function, characteristics of products and appearance etc elements of the demand. And the use of unconventional technology to the origin of working principle, structure, material, production technology to improve the technology work. Conducting ring to
Miniature Slip Rings achieve production, the needs of work, you need from conducting ring of the structure, function, installation, working environment, use and so on the design of a specific aim. New product development is the product of renewal upgrade a very important stage, many manufacturers in new products development will spend a lot of money, manpower material resources, conducting ring in recent years from military to civilian goods, to realize in all walks of life of the application requirements, and do a lot of research and development. Foot visible new product development for the importance of the enterprise.
Of course, too, has a scientific management program management, in order to Capsule Slip Rings improve the development section of operational function. Basically has the following steps: 1, survey and analysis, in the new product development, are a necessary of the early work, are mainly in the product market conditions, technical level, and the prospects of demand analysis and anticipation and make scientific feasibility analysis. And make products of the medium and long term, short development plan and the concrete implementation plan. 2, the determination of design, product design include developing new products to the establishment of the project design scheme of the whole process. It is the core of the new product development content and main task. And bear directly on the new product development plan of success or failure. On the other hand, it can be used as a measure of an enterprise's technical level of ability is an important basis, first is to, the establishment of the design plan descriptions, including the new product to achieve technical parameters, working principle, structure, system requirements. Second is the design of the scheme, including technical model calculation, research, test report, calculations, engineering drawings, tolerance, size, cost and system diagram, inspection means and standards and new product reliability, maintenance performance, the establishment of the manufacturing process. 3, experiment and trial-produce, new product development design program of the success must through the trial and to recognize the development stage, manufacture and trial-produce process fully make up for the design process of neglect and vulnerabilities. Complete simulating the whole process of the establishment and every detail of the cost estimates. 4, after the success of the pilot of the work handover, new product development to production formally handed over marks new product development success, need to before production workshop layout of production equipment, operating standards, technological process, inspection method, inspection standards, such as defective rate to guide and standards. Finally, but also to the achievement of the new product development review and approval, and the whole development of the same period performance appraisal, and new products market reaction feedback. Rotary joint in today's more intense market competition environment, only by constantly innovation, continuous research and development, improve the performance of the conducting ring, to win the future.
Of course, too, has a scientific management program management, in order to Capsule Slip Rings improve the development section of operational function. Basically has the following steps: 1, survey and analysis, in the new product development, are a necessary of the early work, are mainly in the product market conditions, technical level, and the prospects of demand analysis and anticipation and make scientific feasibility analysis. And make products of the medium and long term, short development plan and the concrete implementation plan. 2, the determination of design, product design include developing new products to the establishment of the project design scheme of the whole process. It is the core of the new product development content and main task. And bear directly on the new product development plan of success or failure. On the other hand, it can be used as a measure of an enterprise's technical level of ability is an important basis, first is to, the establishment of the design plan descriptions, including the new product to achieve technical parameters, working principle, structure, system requirements. Second is the design of the scheme, including technical model calculation, research, test report, calculations, engineering drawings, tolerance, size, cost and system diagram, inspection means and standards and new product reliability, maintenance performance, the establishment of the manufacturing process. 3, experiment and trial-produce, new product development design program of the success must through the trial and to recognize the development stage, manufacture and trial-produce process fully make up for the design process of neglect and vulnerabilities. Complete simulating the whole process of the establishment and every detail of the cost estimates. 4, after the success of the pilot of the work handover, new product development to production formally handed over marks new product development success, need to before production workshop layout of production equipment, operating standards, technological process, inspection method, inspection standards, such as defective rate to guide and standards. Finally, but also to the achievement of the new product development review and approval, and the whole development of the same period performance appraisal, and new products market reaction feedback. Rotary joint in today's more intense market competition environment, only by constantly innovation, continuous research and development, improve the performance of the conducting ring, to win the future.
Slipping highly dependent on high-end engineering equipment industry phenomenon
Slipping the days get industry in recent rapid development, by 2010 revenue growth of 30% in China than in 2011 slip rings industry association of industry revenue growth slipping expected slashed. With the new national strategic industry research focus in product development direction, analyzes the development of the industry of shipping information. This association argued that while 2011 slipping industry will remain stable development, but the business income growth will fall to 12% from. Notable is, slipping industrial development is confronted with some unfavorable factors.
Farm machinery, electrical home appliances, the volatility of the market for the development of the industry will drag speed has certain influence. Expect 2011 prices of raw materials and labor costs will present its, thus to bring certain enterprise cost pressure. General will exchange rate is increasing, and the common slipping the competitiveness of the products of slipping will further weakened, products export of slipping stress will gradually increase, slipping import will also increase products. By China's economic effect on the development of fast steady, at present our country with more than 160 kilometers per passenger rely on the import of all slipping, through ascension to realize the nationalization technology for the domestic market share is China's railway slipping faced with the reality of the development of the industry. International multinational companies to speed up the Miniature Slip Rings in our country the speed of expansion of the factory, in high-end market competition will be more intense slip rings. In addition, attaches great importance to the development of the market, according to the market development timely adjustment of product structure; Pay high attention to the scientific research, the old products in research and technology promotion, not only to develop new products according to market real-time, according to the market development research reserve some future ahead of new products; Attaches great importance to the promotion of management level, to management cost reduction, enhance the competitiveness of enterprises. Association hopes the enterprise should attach great importance to the host country, industry and slipping the industry "1025" development planning, combined with the enterprise itself is the development of the situation analysis, enterprise development planning decisions as soon as possible. Industry Association secretary-general WangQuanQing Capsule Slip Rings , thinks that in 2011 of the industry will further pressure drag increases. The rate of growth of the industry will drag slow down, be worth slipping enterprise of the attention. The products produced in our country in performance and price slipping, high precision, low noise, long life and high reliability and foreign well-known enterprise has the big gap. X-ray introduction, the high-speed performance is decided to drag it's can you adapt yourself to the basic conditions of the high-speed railway. The train can request in very strict working condition. Especially, in radial, axial and sometimes in the direction of rotation and acceleration of an operation condition, urged the railway slipping must prolong maintenance cycle, and must be in the maximum reliability keep its function. X-ray revealed that, although our country industry in recent years the rapid development to drag, but mainly in the ordinary sloping field, and the world powers slipping compared, China has the big gap, main performance in high precision, high technology content and high value-added rate is low, the product poor stability, reliability low, short life. Reflect on the market, is our demand for high quality slipping to rely on the import to meet. Among them, the precise level and large slipping demand growth of about 20% of the compound. In total demand, machine tool with precision slipping, engineering machinery, heavy rolling mill, with large slipping high-tech markets such as the slip rings in demand. Due to the high iron related products purchasing has strict procurement qualification, so the current domestic haven't related enterprise through the test, will have to wait at least a domestic enterprise through the ability after detecting said which can produce high iron enterprise related spare parts. "XunJian then disclosed. At present our country high iron slipping all still rely on imports, the next five years to achieve high iron slipping localization of the target may need to delay. For example trauma shares have been preaching to enter the high iron slipping market, but in fact high barriers to entry iron slipping is very high, according to our survey domestic currently does not have a firm possesses high iron slipping the product production ability. "Researchers said. Although the final statistics have not yet come, but the data shows, slipping 2010 advocate business wi income industry will exceed one hundred billion yuan RMB to 120 billion yuan. Growth could be as high as 30%. In the car, farm, the incomes of household electrical appliance industry, 2010 small slipping demand growth, the annual output is expected to reach 15 billion sets of slipping, up by 36.36%. Can be expected to realize the profit of 6.5 billion yuan RMB, a 38.3% growth from last year. In 2010 the export will reach 4.15 billion sets of slipping, year-on-year growth of 53.65%, a 28.9% increase over 2008; export will reach $3.32 billion, an increase of up to 63.6%, 11.4% increase over 2008. WangQuanQing analysis, a sharp increase in export is mainly because the slipring industry in recent years after, small small-sized slipping the product quality level has come close to the technology level in the world. Small small-sized slipping the market has already occupied a stable market. And the import of 2010 will reach 1.8 billion sets of slipping, year-on-year growth of 30%, a 13.7% increase over 2008. Imports of foreign exchange will reach 3.8 billion us dollars, up 34.38%, a 41.8% increase over 2008 or so. The import and export trade deficit could reach $480 million. In July 2010, China slipping in high speed railway industry association slip rings in consultation with, to determine the axial inquiry by the science and technology as a project lead unit, in slipping in high speed railway industry the development of a drag. Then, the national science and technology department issued "1025" guidelines, to "high-speed railway and the urban rail transit vehicles slipping key technology research and application" subject best bid, in view of the high speed railway and light rail, subway, urban rail transit vehicles to the need for sleeping, supporting the development of the high reliability slip rings, break through the key technology, complete the reliability test. Project set goals: high iron slipping quartile 250km per hour. Rail transit vehicles slipping quartile 100km per hour; from batch production ability, realized industrialization. Project schedule: 2011 to complete task survey, mainly including subject project work decomposition, slipping speed spectrum and the load spectrum analysis to set up, and the structure of slipping the optimization design and simulation analysis and so on work; 2012 the design completely finished slipping research and drawing design, complete the heat treatment technology research and analysis, etc; In October 2013 to finish before the sleeping bench test, performance evaluation and reliability assessment; 12 months to complete subject acceptance. X-ray revealed that imports from the United States in the domestic just some testing equipment, specialized used to test the performance of the high iron related spare parts, although now some enterprise claimed that can produce and the related high-end slip rings, but is still waiting for product inspection, because the slip rings is expendable, so the indices such as service life to pass strict inspection. In 2010 the national slipping the advantages of the industrial enterprise research and development in the field of the 13 key 106 kind of important technical equipment supporting slipping 528 kinds, the additional annual sales income is 9.2 billion yuan, the products reach the level of products abroad. WangQuanQing stressed that slipping industry in 2010 for our country key areas of major technical equipment authorization have made a contribution.. And the small ball slipping manufacturing technology and the design of the product quality has reached the international advanced level, and has a strong international competitiveness. The small ball grinding, the drag finish machining and assembling automatic production line, and has increased to more than 3000 of the sun. The reporter understands, in the above mentioned 106 kind of important technical equipment supporting slipping, including reach the international advanced level of wind power generators yaw, variable pitch slipping, nuclear power plant secondary pump slipping, permit high-speed railway passenger slipping, overloaded railroad freight slipping speed, high horse-power locomotives slipping, cement grinding machine made slip rings, a new generation of CT machine slipping, third generation car wheel slipping unit, long life water pump shaft even slip rings, the ultra precision level's Jimmy's mill slipping, continuous casting production line for the slip rings etc, which, with "god five", "god six", "god seven", "charng-er's no.1", "the goddess of the two" and big thrust rockets, "fighters ten" represented the aerospace, aviation and defense equipment supporting slipping domestic all, with a fully independent intellectual property and has realized industrialization. In addition, the thousand tons hydraulic crawler crane slipping, an agricultural equipment slip rings, the steam flow drag spinning, of underground coal mining equipment slipping, heavy large dc machine tool spindle, rotary worktable slipping, 12000 meters high reliability super deep well drilling RIGS slipping, high speed, high temperature resistance, long life and chemical fiber equipment slipping, long life mining vibrating screen and thin wall slipping also has r&d robot slipping success and industrialization. Industrialization of slipping will trade wash dish and restructuring, let some quality enterprises to survive and have a greater development
Farm machinery, electrical home appliances, the volatility of the market for the development of the industry will drag speed has certain influence. Expect 2011 prices of raw materials and labor costs will present its, thus to bring certain enterprise cost pressure. General will exchange rate is increasing, and the common slipping the competitiveness of the products of slipping will further weakened, products export of slipping stress will gradually increase, slipping import will also increase products. By China's economic effect on the development of fast steady, at present our country with more than 160 kilometers per passenger rely on the import of all slipping, through ascension to realize the nationalization technology for the domestic market share is China's railway slipping faced with the reality of the development of the industry. International multinational companies to speed up the Miniature Slip Rings in our country the speed of expansion of the factory, in high-end market competition will be more intense slip rings. In addition, attaches great importance to the development of the market, according to the market development timely adjustment of product structure; Pay high attention to the scientific research, the old products in research and technology promotion, not only to develop new products according to market real-time, according to the market development research reserve some future ahead of new products; Attaches great importance to the promotion of management level, to management cost reduction, enhance the competitiveness of enterprises. Association hopes the enterprise should attach great importance to the host country, industry and slipping the industry "1025" development planning, combined with the enterprise itself is the development of the situation analysis, enterprise development planning decisions as soon as possible. Industry Association secretary-general WangQuanQing Capsule Slip Rings , thinks that in 2011 of the industry will further pressure drag increases. The rate of growth of the industry will drag slow down, be worth slipping enterprise of the attention. The products produced in our country in performance and price slipping, high precision, low noise, long life and high reliability and foreign well-known enterprise has the big gap. X-ray introduction, the high-speed performance is decided to drag it's can you adapt yourself to the basic conditions of the high-speed railway. The train can request in very strict working condition. Especially, in radial, axial and sometimes in the direction of rotation and acceleration of an operation condition, urged the railway slipping must prolong maintenance cycle, and must be in the maximum reliability keep its function. X-ray revealed that, although our country industry in recent years the rapid development to drag, but mainly in the ordinary sloping field, and the world powers slipping compared, China has the big gap, main performance in high precision, high technology content and high value-added rate is low, the product poor stability, reliability low, short life. Reflect on the market, is our demand for high quality slipping to rely on the import to meet. Among them, the precise level and large slipping demand growth of about 20% of the compound. In total demand, machine tool with precision slipping, engineering machinery, heavy rolling mill, with large slipping high-tech markets such as the slip rings in demand. Due to the high iron related products purchasing has strict procurement qualification, so the current domestic haven't related enterprise through the test, will have to wait at least a domestic enterprise through the ability after detecting said which can produce high iron enterprise related spare parts. "XunJian then disclosed. At present our country high iron slipping all still rely on imports, the next five years to achieve high iron slipping localization of the target may need to delay. For example trauma shares have been preaching to enter the high iron slipping market, but in fact high barriers to entry iron slipping is very high, according to our survey domestic currently does not have a firm possesses high iron slipping the product production ability. "Researchers said. Although the final statistics have not yet come, but the data shows, slipping 2010 advocate business wi income industry will exceed one hundred billion yuan RMB to 120 billion yuan. Growth could be as high as 30%. In the car, farm, the incomes of household electrical appliance industry, 2010 small slipping demand growth, the annual output is expected to reach 15 billion sets of slipping, up by 36.36%. Can be expected to realize the profit of 6.5 billion yuan RMB, a 38.3% growth from last year. In 2010 the export will reach 4.15 billion sets of slipping, year-on-year growth of 53.65%, a 28.9% increase over 2008; export will reach $3.32 billion, an increase of up to 63.6%, 11.4% increase over 2008. WangQuanQing analysis, a sharp increase in export is mainly because the slipring industry in recent years after, small small-sized slipping the product quality level has come close to the technology level in the world. Small small-sized slipping the market has already occupied a stable market. And the import of 2010 will reach 1.8 billion sets of slipping, year-on-year growth of 30%, a 13.7% increase over 2008. Imports of foreign exchange will reach 3.8 billion us dollars, up 34.38%, a 41.8% increase over 2008 or so. The import and export trade deficit could reach $480 million. In July 2010, China slipping in high speed railway industry association slip rings in consultation with, to determine the axial inquiry by the science and technology as a project lead unit, in slipping in high speed railway industry the development of a drag. Then, the national science and technology department issued "1025" guidelines, to "high-speed railway and the urban rail transit vehicles slipping key technology research and application" subject best bid, in view of the high speed railway and light rail, subway, urban rail transit vehicles to the need for sleeping, supporting the development of the high reliability slip rings, break through the key technology, complete the reliability test. Project set goals: high iron slipping quartile 250km per hour. Rail transit vehicles slipping quartile 100km per hour; from batch production ability, realized industrialization. Project schedule: 2011 to complete task survey, mainly including subject project work decomposition, slipping speed spectrum and the load spectrum analysis to set up, and the structure of slipping the optimization design and simulation analysis and so on work; 2012 the design completely finished slipping research and drawing design, complete the heat treatment technology research and analysis, etc; In October 2013 to finish before the sleeping bench test, performance evaluation and reliability assessment; 12 months to complete subject acceptance. X-ray revealed that imports from the United States in the domestic just some testing equipment, specialized used to test the performance of the high iron related spare parts, although now some enterprise claimed that can produce and the related high-end slip rings, but is still waiting for product inspection, because the slip rings is expendable, so the indices such as service life to pass strict inspection. In 2010 the national slipping the advantages of the industrial enterprise research and development in the field of the 13 key 106 kind of important technical equipment supporting slipping 528 kinds, the additional annual sales income is 9.2 billion yuan, the products reach the level of products abroad. WangQuanQing stressed that slipping industry in 2010 for our country key areas of major technical equipment authorization have made a contribution.. And the small ball slipping manufacturing technology and the design of the product quality has reached the international advanced level, and has a strong international competitiveness. The small ball grinding, the drag finish machining and assembling automatic production line, and has increased to more than 3000 of the sun. The reporter understands, in the above mentioned 106 kind of important technical equipment supporting slipping, including reach the international advanced level of wind power generators yaw, variable pitch slipping, nuclear power plant secondary pump slipping, permit high-speed railway passenger slipping, overloaded railroad freight slipping speed, high horse-power locomotives slipping, cement grinding machine made slip rings, a new generation of CT machine slipping, third generation car wheel slipping unit, long life water pump shaft even slip rings, the ultra precision level's Jimmy's mill slipping, continuous casting production line for the slip rings etc, which, with "god five", "god six", "god seven", "charng-er's no.1", "the goddess of the two" and big thrust rockets, "fighters ten" represented the aerospace, aviation and defense equipment supporting slipping domestic all, with a fully independent intellectual property and has realized industrialization. In addition, the thousand tons hydraulic crawler crane slipping, an agricultural equipment slip rings, the steam flow drag spinning, of underground coal mining equipment slipping, heavy large dc machine tool spindle, rotary worktable slipping, 12000 meters high reliability super deep well drilling RIGS slipping, high speed, high temperature resistance, long life and chemical fiber equipment slipping, long life mining vibrating screen and thin wall slipping also has r&d robot slipping success and industrialization. Industrialization of slipping will trade wash dish and restructuring, let some quality enterprises to survive and have a greater development
2012年7月10日星期二
Space technology sliping the status quo of the development of analysis
Sliping the application of in space is a very high end of Miniature Slip Rings the application, in many cases, spaceflight transmission of data is very large and stability requirement is very high, on the material quality is demanding, so say as long as in the fields of application to conducting ring, in civil areas will be very stable and reliable quality of a kind of spare parts. Space technology transfer and secondary application field of more, main have communication/data processing, transportation, environment, etc. For Marine development and biological technology for, space technology provide it with the new development tools and research means.
The development of space technology brings space science, research and experiment and microgravity science research in the field of great development, such as the alpha CiPuYi experiment opened space science research a new field, aerospace science and industry civilian goods project conducting ring system in high speed data transmission of the key technology, transmission speeds up to 2.5 Gbps. And there's energy, processing and manufacturing industry, medicine, consumer products,, which mainly has: space technology technology directly use; Through the space technology and technical personnel flow, will space technology to civilian use products; Will space technology transfer to other government departments.
Through the sliping the daily activity of the space technology will space technology to civilian use, space technology help "manufacturing market"; Space technology industrial application center to help the private enterprise will space technology to civilian use; By sliping of space technology testing or use, to make new product commercialization process accelerated;The development of space technology needs a series of conducting ring support technology, and through the development of technology "demand effect" led a series of new industries and conducting ring the development of new technology.
The development of space technology of information technology, the new material technology and new energy technology continuously put forward new requirements, which promoted the development Capsule Slip Rings aerospace science and industry system is independent research projects of civilian consumer goods, is high-end security apparatus, medical CT and industrial CT key components, used to realize the launch of state in rotating device and fixed state between receiving installation conducting ring high speed high reliability data transmission.At present the world category of conducting ring in space technology and is about to stay in the Wright brothers made the first plane that stage--in the early stage.
Because the use of liquid fuel as a propellant, to a great extent determine the shape of the spacecraft is only strip type, the rockets type. And it is also why maglev technology has been applied to carry, but not used in aerospace science and technology? Magnetic levitation can not only control the size of the magnetic field, and use electricity such a clean energy. All parts are sliping, even without any a component. Beijing university of aeronautics and economic management institute professor HanLiYan revealed that, whether the shenzhou series or the long march rocket, the department outfit and assembly by defense system are all doing, the private enterprise no intervention.
At present, China's space technology research subject is the China aerospace science and technology corporation and China aerospace science and industry corporation two big central enterprise, some research institutions of funding also full by national finance support.
A lot of research funds, space slip rings technical talents, technology accumulation, these advantages all on the country's aerospace research units and subordinate enterprise, corporation can participate in do some equipment and technology is pretty good.
How to ensure that the drag from the craft will not be burned?
In the use of revolving joints , many cases will appear slipping burns, usually, it would be because of improper use or to use it not abide by certain rules of reason, let's from process angle to detailed instructions on how to avoid slipping can be burned. The so-called import slipping burn injury refers to appear in state: Import slipping rolling wheel, the word roller in rotation and maintains a sharp fever until discoloration, softening, deposition rates.The end damage. On import slipping relevant material lubrication, next is probably too big load (preloading too big).
Revs. Clearance is too small. There is water or other foreign invasion.
If the above two kinds of circumstances are not so is axis, the precision of the box, the undesirable slipping the deflection of the shaft. Research wants to cooperate, slipping clearance and preloading, and improve the seal device. Check the shaft and slipping the precision of the box.
Many experiments have shown both at home and abroad: keep frame, the processing quality steel ball rings, of slipping vibration has the influence of different level, the processing quality of steel ball of slipping vibration influence the most obvious, followed by the collar processing quality, the most is the main influential factor of steel ball and contractor roundness, the striation, surface roughness, surface knocked wounded, etc.
Of course, if you have experts next to it, let him follow you learn best operation!!!! Cause import slipping burns is the main cause of the import of slipping due to bad lubrication, may use the informal lubricant, or lubricant too much, too little, all is not correct. If the workpiece in relay in producing knock against injury, will directly reflect the complex to get word processing on the surface, affect the vibration rotaryjoint rotary joints . So we have to take the following measures: improve locating datum surface shape accuracy; see here, I think we all want to know the solution right, first of all, to study lubricant and lubrication method, choose to Miniature Slip Rings on lubricant, and dosage, and to correct the choice of shipping. In order to improve the precision machining datum, reduce the grinding process of the error after the moon with grinding the face is outer the processes of the locating datum. Outer diameter of the error of the channel ultra precision is through the outer diameter reflect the complex to ditch grinding, ditch to ditch the error of the grinding the complex reflects the indirect transmission. In process of transfer smoothly, no knocked wounded; Blank allowance for form error can not be too big, especially in a lower amount of hours, too much can cause end mill and error at the end of the ultra precision has not been improved to a final shape accuracy of the quality requirements, the serious influence processing quality consistency. Suggestions on the import slipping used, should pay attention to the installation, lubrication, clearance and so on various links all do as exactly as possible, in place. Turntable slipping the way a important tectonic distinguish include four-point contact ball wheel slipping, a double row angular contact thrust ball wheel slipping into towns, rotary slipping into towns, rotary sliding turntable slipping commonly used to a lifting transportation machinery, mining machinery, construction machinery, port machinery, equipment and high precision of the radar ship the large rotary installation.
Of course, if you have experts next to it, let him follow you learn best operation!!!! Cause import slipping burns is the main cause of the import of slipping due to bad lubrication, may use the informal lubricant, or lubricant too much, too little, all is not correct. If the workpiece in relay in producing knock against injury, will directly reflect the complex to get word processing on the surface, affect the vibration rotaryjoint rotary joints . So we have to take the following measures: improve locating datum surface shape accuracy; see here, I think we all want to know the solution right, first of all, to study lubricant and lubrication method, choose to Miniature Slip Rings on lubricant, and dosage, and to correct the choice of shipping. In order to improve the precision machining datum, reduce the grinding process of the error after the moon with grinding the face is outer the processes of the locating datum. Outer diameter of the error of the channel ultra precision is through the outer diameter reflect the complex to ditch grinding, ditch to ditch the error of the grinding the complex reflects the indirect transmission. In process of transfer smoothly, no knocked wounded; Blank allowance for form error can not be too big, especially in a lower amount of hours, too much can cause end mill and error at the end of the ultra precision has not been improved to a final shape accuracy of the quality requirements, the serious influence processing quality consistency. Suggestions on the import slipping used, should pay attention to the installation, lubrication, clearance and so on various links all do as exactly as possible, in place. Turntable slipping the way a important tectonic distinguish include four-point contact ball wheel slipping, a double row angular contact thrust ball wheel slipping into towns, rotary slipping into towns, rotary sliding turntable slipping commonly used to a lifting transportation machinery, mining machinery, construction machinery, port machinery, equipment and high precision of the radar ship the large rotary installation.
2012年7月8日星期日
Rotary joints of the various types of work principle
According to the needs of different Rotary joint , use, working theory and classification, the different classification, principle of work also has the corresponding difference.
Loop in case the rotating joint work to choose connection. Transmission medium in entrance works free choice side or back end to enter. Seal face and sealing ring for special materials made of, wear resistance, long life, corrosion resistance, no leakage.
The rotating joint internally has two precision bearings, smooth operation lasting, and strengthens the flexible, friction coefficient is small, so can high-speed operation. Internal seals the situation by products can wear that visual appearance, can prevent mechanical shutdown or mechanical damage, to achieve the effect of prevention and reduce the loss. Seal wear change easy servicing, need not to purchase the new products, to save costs. Single loop series Capsule Slip Rings : satisfy the domestic and foreign various industrial demand, fluid medium water (water), steam (steam), oil (oil), Air (Air), vacuum (vacuum) cutting fluids (coolant), toluene and chemical solvents. Single loop is in the rotating joint work situation to choose the connection. Transmission medium in entrance works free choice side or back end to enter. Seal face and sealing ring for special materials made of, wear resistance, long life, corrosion resistance, no leakage. The rotating joint internal has 2 precision bearings, smooth operation lasting, strong, agile, small friction coefficient. It can be high-speed operation. Internal seals the situation by products can wear that visual appearance, can prevent mechanical shutdown or mechanical damage, to achieve the effect of prevention and reduce the loss. Seal wear change easy servicing, need not to purchase the new products, to save costs. Double loop rotary joints can be divided into the double loop stationary and double loop rotary rotary joints. Seal face and sealing ring for special materials made of, wear resistance, long life, corrosion resistance, no leakage. Internal seals the situation by products can wear that visual appearance, can prevent mechanical shutdown or mechanical damage, came to prevent effective and reduce the loss.
Has independent lines, can make different work needs to make a choice, to give play to the biggest benefit. Shell and shaft bearing support of precision, as the light and flexible rotation, friction force is small, the liquid medium can include water, oil, air, and use a wide industry. Seal wear change easy servicing, need not to purchase the new products, to save costs. Product features: The Miniature Slip Rings RF type features: High quality rotary joints and precision bearing device in high-stiffness axle, long time running no vibration, rotors undergo special heat treatment to increase stiffness, fixed ring enclosure is by the special concentrated carbon graphite, anti-wear-out made, waterproof and dry operation, and especially rotating sealing surface has to be minimized to the minimum, even in high pressure and approved by the company long-term mechanical sealing face becomes a experience better balance results, RF type to use bronze ring joint fixed for the high pressure 200 bar in use Application: General tools gave, workstations, electronic and computer control value, rotate the dispenser If have high rotation speed and high pressure working environment, please with this company to consulting. Material: Fixed ring: powdered carbon graphite and bronze Shaft: stainless steel and high hardness stainless steel Shell: aluminum alloy Sealing faces: graphite and stainless steel Pad: O-ring RBI types: This kind of rotary joint to special mechanical function and design, fixed ring closed part is made by TanJing graphite, abrasion resistance, waterproof, and dry operation and approved by the company long-term mechanical sealing face becomes an experience better balance result. Material: Fixed ring: powdered carbon graphite and bronze Shaft: stainless steel and high hardness stainless steel Shell: aluminum alloy Sealing faces: graphite and stainless steel Pad: O-ring RLB/RLF rotary joints, coolant for rotary could engage in high speed under the ordinance especially use is very difficult, and parts of a particular maze-design subassembly among leak, the two sealing faces by carbonization refined into, the guarantee period operation and wear resistance, sealing ring in normal function to the appropriate balance or even in high speed guarantees extremely low wear. RMB/RMF rotary joints have open/close the function characteristic, the on/coolant is flowing through the instantaneous engage in this period avoid contact leakage and high precision, when cooling agent stops flowing through, the sealing faces opened immediately to avoid friction, and this function ensures long service life. The important thing is a labyrinth by a minority liquid to prevent back to leak The two contact surfaces by wear resistance and mechanical jolt of tungsten carbide create, use stainless steel spring, rusty, not hinder, rotary and not subject to any changes, including RMB and RMF coolant is different direction of connection RHB/RHF type rotary joints subject surfaces have groove, can help in high speed rotating heat dissipation. With open/close function, When coolant through open/close mechanical devices, contact surfaces automatically close to prevent splashing leak, coolant automatically detaches, avoid dry friction, ensure long-term operation interface does not pick up dry running damaged, more important is the maze-design subassembly to prevent leakage splash. The two contact surfaces by wear resistance and mechanical jolt of tungsten carbide create, use stainless steel spring, rusty, not hinder, rotary and not subject to any changes, including RHB and RHF coolant connection of different direction. Rotating joint RGC series products rotary joints to the deep hole processing cutting tool type and simple in design, such rotary joints with fast speed, the pressure, strong, only need for a device with the original equipment factory, this series products are to save costs, let users maximum economic benefits. Wide range, widely used in numerical control lathe, ordinary boring and milling machine, drill press and processing center machine, drilling a deep hole, do not need special deep hole processing machine. Use scope for mould, hydraulic industry, printing, packaging and general hardware unemployment drilling, drilling industry, etc. Largest use pressure: 70 BAR Largest use temperature: 100 ℃ Largest use speed: 8000 RPM
The rotating joint internally has two precision bearings, smooth operation lasting, and strengthens the flexible, friction coefficient is small, so can high-speed operation. Internal seals the situation by products can wear that visual appearance, can prevent mechanical shutdown or mechanical damage, to achieve the effect of prevention and reduce the loss. Seal wear change easy servicing, need not to purchase the new products, to save costs. Single loop series Capsule Slip Rings : satisfy the domestic and foreign various industrial demand, fluid medium water (water), steam (steam), oil (oil), Air (Air), vacuum (vacuum) cutting fluids (coolant), toluene and chemical solvents. Single loop is in the rotating joint work situation to choose the connection. Transmission medium in entrance works free choice side or back end to enter. Seal face and sealing ring for special materials made of, wear resistance, long life, corrosion resistance, no leakage. The rotating joint internal has 2 precision bearings, smooth operation lasting, strong, agile, small friction coefficient. It can be high-speed operation. Internal seals the situation by products can wear that visual appearance, can prevent mechanical shutdown or mechanical damage, to achieve the effect of prevention and reduce the loss. Seal wear change easy servicing, need not to purchase the new products, to save costs. Double loop rotary joints can be divided into the double loop stationary and double loop rotary rotary joints. Seal face and sealing ring for special materials made of, wear resistance, long life, corrosion resistance, no leakage. Internal seals the situation by products can wear that visual appearance, can prevent mechanical shutdown or mechanical damage, came to prevent effective and reduce the loss.
Has independent lines, can make different work needs to make a choice, to give play to the biggest benefit. Shell and shaft bearing support of precision, as the light and flexible rotation, friction force is small, the liquid medium can include water, oil, air, and use a wide industry. Seal wear change easy servicing, need not to purchase the new products, to save costs. Product features: The Miniature Slip Rings RF type features: High quality rotary joints and precision bearing device in high-stiffness axle, long time running no vibration, rotors undergo special heat treatment to increase stiffness, fixed ring enclosure is by the special concentrated carbon graphite, anti-wear-out made, waterproof and dry operation, and especially rotating sealing surface has to be minimized to the minimum, even in high pressure and approved by the company long-term mechanical sealing face becomes a experience better balance results, RF type to use bronze ring joint fixed for the high pressure 200 bar in use Application: General tools gave, workstations, electronic and computer control value, rotate the dispenser If have high rotation speed and high pressure working environment, please with this company to consulting. Material: Fixed ring: powdered carbon graphite and bronze Shaft: stainless steel and high hardness stainless steel Shell: aluminum alloy Sealing faces: graphite and stainless steel Pad: O-ring RBI types: This kind of rotary joint to special mechanical function and design, fixed ring closed part is made by TanJing graphite, abrasion resistance, waterproof, and dry operation and approved by the company long-term mechanical sealing face becomes an experience better balance result. Material: Fixed ring: powdered carbon graphite and bronze Shaft: stainless steel and high hardness stainless steel Shell: aluminum alloy Sealing faces: graphite and stainless steel Pad: O-ring RLB/RLF rotary joints, coolant for rotary could engage in high speed under the ordinance especially use is very difficult, and parts of a particular maze-design subassembly among leak, the two sealing faces by carbonization refined into, the guarantee period operation and wear resistance, sealing ring in normal function to the appropriate balance or even in high speed guarantees extremely low wear. RMB/RMF rotary joints have open/close the function characteristic, the on/coolant is flowing through the instantaneous engage in this period avoid contact leakage and high precision, when cooling agent stops flowing through, the sealing faces opened immediately to avoid friction, and this function ensures long service life. The important thing is a labyrinth by a minority liquid to prevent back to leak The two contact surfaces by wear resistance and mechanical jolt of tungsten carbide create, use stainless steel spring, rusty, not hinder, rotary and not subject to any changes, including RMB and RMF coolant is different direction of connection RHB/RHF type rotary joints subject surfaces have groove, can help in high speed rotating heat dissipation. With open/close function, When coolant through open/close mechanical devices, contact surfaces automatically close to prevent splashing leak, coolant automatically detaches, avoid dry friction, ensure long-term operation interface does not pick up dry running damaged, more important is the maze-design subassembly to prevent leakage splash. The two contact surfaces by wear resistance and mechanical jolt of tungsten carbide create, use stainless steel spring, rusty, not hinder, rotary and not subject to any changes, including RHB and RHF coolant connection of different direction. Rotating joint RGC series products rotary joints to the deep hole processing cutting tool type and simple in design, such rotary joints with fast speed, the pressure, strong, only need for a device with the original equipment factory, this series products are to save costs, let users maximum economic benefits. Wide range, widely used in numerical control lathe, ordinary boring and milling machine, drill press and processing center machine, drilling a deep hole, do not need special deep hole processing machine. Use scope for mould, hydraulic industry, printing, packaging and general hardware unemployment drilling, drilling industry, etc. Largest use pressure: 70 BAR Largest use temperature: 100 ℃ Largest use speed: 8000 RPM
2012年7月6日星期五
Shanghai World Expo operation balance 1.05 billion
Beijing October 3, according to 3, the media reports, American New York bursts of "occupation of Wall Street" protests have to revolving joint other U.S. cities spread, among them, Los Angeles, Boston, Chicago, Denver and Seattle have happened to the protests.
September 17, started by the consumer Internet Magazine "advertising Buster" organization in the online promotion, called the "occupation of Wall Street" campaign, designed to express the U.S. financial system, with protests financial system "favour" powerful class reality.
At present the activity has been half a month, police arrested more than 700 demonstrators. However, only to rise no heat activity came, and went to the United States across all the big cities. Los Angeles Saturday, 1) in Los Angeles, hundreds of demonstrators from PanXing square set out to city hall, and said to through bore slip rings the New York demonstrators study, will be in "every possible place set up camp. Protests by a group called "occupied the Los Angeles" by the group. The protesters want to change America's only for the favorable financial rich system. The demonstrators exalted banners, top writes "back at my child" and "Hi, Hi, company welfare rolls out" slogan, etc.
A student at the University of Southern California said: "Our hope is that the last can inspire the workers to take part in the protests." Boston Boston's protests in also quietly to Miniature Slip Rings upgrade. The federal reserve bank of Boston building nearby Dewey Square has built a huge camp, camp in a tent, medical assistance, and even a wireless network. The first day of protest has been more than 1000 demonstrators to attend. A IT practitioners Matthew G LaoWei said this, he saw the protest in Manhattan, so want to recreate this in Boston also a scene. Chicago From September 23 start, Chicago broke thousands of silent protest. Willis tower in local protesters near it, and now, this area is the protesters called "free square". "This is our 'liberation Square", and if necessary, we will stay here for several months." A protester said.
At present the activity has been half a month, police arrested more than 700 demonstrators. However, only to rise no heat activity came, and went to the United States across all the big cities. Los Angeles Saturday, 1) in Los Angeles, hundreds of demonstrators from PanXing square set out to city hall, and said to through bore slip rings the New York demonstrators study, will be in "every possible place set up camp. Protests by a group called "occupied the Los Angeles" by the group. The protesters want to change America's only for the favorable financial rich system. The demonstrators exalted banners, top writes "back at my child" and "Hi, Hi, company welfare rolls out" slogan, etc.
A student at the University of Southern California said: "Our hope is that the last can inspire the workers to take part in the protests." Boston Boston's protests in also quietly to Miniature Slip Rings upgrade. The federal reserve bank of Boston building nearby Dewey Square has built a huge camp, camp in a tent, medical assistance, and even a wireless network. The first day of protest has been more than 1000 demonstrators to attend. A IT practitioners Matthew G LaoWei said this, he saw the protest in Manhattan, so want to recreate this in Boston also a scene. Chicago From September 23 start, Chicago broke thousands of silent protest. Willis tower in local protesters near it, and now, this area is the protesters called "free square". "This is our 'liberation Square", and if necessary, we will stay here for several months." A protester said.
2012年7月5日星期四
Welding jointly choose to have skills
The company mainly produces GB, JB, JB/ZQ, KJ class standard revolving joint and DIN, ISO standards and all the threads standard UNF series hydraulic connection pipe joint, the bottom of the high pressure series steel braided (winding) hose assembly, hydraulic oil cylinder, the company products in petroleum, chemical, shipbuilding, metallurgy, engineering, construction, transportation, etc widely used in large and medium-sized and more than 40 velocity supporting, supporting the host with Pakistan, Iran, Sudan exports, Egypt, Russia and other countries and regions, and access to the customer high praise. Rotating welding tube fittings pipe diameter according to through bore slip rings choose fast pipe fittings; If the pipe of intermediary pressure fluctuations lesser, can accord to the average medium pressure chooses corresponding fast work pressure fittings. If the media has not often pipeline appear pressure wave, in addition to (1) the requirement in the fast work pressure fittings choose, should also guarantee of media through the maximum pressure shall not be more than 1.5 times of the working pressure, or should press media through the maximum pressure choose corresponding work pressure fast fittings.
Machinery enterprise profits toward the two direction changes Along with the enterprise on technology investment, machinery enterprise technology innovation more and more quickly, from labor-intensive gradually to technology intensive change, labor productivity and profit margins up; On the other hand, because the price of the raw material, human and utilities costs rise, exchange rates and other reasons, the rise in the cost of many products, the production of too cheap product, in their own enterprises, between the upscale product in the foreign capital enterprise and foreign and domestic enterprises between between the price of increasingly fierce competition, some enterprises profits fall has signs. "Export growth fast, import growth small" in the second half of the state will not change. The surface phenomenon can be analyzed that, enterprise innovation, and a strong ability of the profits of the business should be harder, but in fact is not so, enterprise innovation fast is a good thing, but the product research and development, to Miniature Slip Rings market to accept need a process. And in the enterprise often put huge yourself to do research and development.
Machinery enterprise profits toward the two direction changes Along with the enterprise on technology investment, machinery enterprise technology innovation more and more quickly, from labor-intensive gradually to technology intensive change, labor productivity and profit margins up; On the other hand, because the price of the raw material, human and utilities costs rise, exchange rates and other reasons, the rise in the cost of many products, the production of too cheap product, in their own enterprises, between the upscale product in the foreign capital enterprise and foreign and domestic enterprises between between the price of increasingly fierce competition, some enterprises profits fall has signs. "Export growth fast, import growth small" in the second half of the state will not change. The surface phenomenon can be analyzed that, enterprise innovation, and a strong ability of the profits of the business should be harder, but in fact is not so, enterprise innovation fast is a good thing, but the product research and development, to Miniature Slip Rings market to accept need a process. And in the enterprise often put huge yourself to do research and development.
2012年7月3日星期二
The hydraulic cylinder seals how to install?
Before the installation, should first check the sealing surface quality, cannot have flash. Burr, crack, is trimming. Porosity and defects such as osteoporosis, seal geometry size and precision all want to
Miniature Slip Rings accord with a standard to ask.
Hole combination sealing ring with the o-ring and wear-resisting of ring. Because o-ring elastic bigger, installation is easy; and wear-resisting ring elastic is bad, if installed directly is the steps, the piston to scratch the surface of the seal grooves, affect the sealing effect.
To ensure that wear-resisting ring installation without being damaged, should take certain measures of installation. Wear-resisting ring mainly by filling polytetrafluoroethylene (PTFE) material is made, has the characteristics of corrosion resistance, thermal expansion coefficient is bigger, so before installation in the 100 ℃ in the oil for 20 min, make its gradually become soft, then use figure 2 shows the tooling with loading of the piston in groove. Figure 2 shows the positioning sets up and fixtures of composition. Positioning set five º angle pouring head, used to Capsule Slip Rings direct the o-ring and wear-resisting with loading at the end of the piston ring groove.
Set up by elastic good 65 Mn steel made by heat treatment, processed into uniform symmetrical 8 disc structure. Note that each disc at the bottom of the hole processing, dividing uniformly, milling open the disc should make JuKou aimed at the center of the holes, in order to ensure that each disc can even up set up open. At the same time, each place should be made (smooth) chamfering, lest damage sealing ring. Each kind of specification of the sealing ring should be a corresponding tooling to ensure that it is assembly requirements. After the installation is complete don't allow sealing ring is distorted, becoming wrinkly, scratch and put the phenomenon exists. The hydraulic cylinder cylinder, cylinder thread in the hole in the welding process often arranges after processing, this will inevitably be threaded hole in export and cylinder wall at the junction of produce burr. For the removal burr, must design the special cutting tools to make the processing, to achieve the purpose of a smooth transition. Special cutting tools of structure see chart 4. When using, the first knife stem from the threaded hole into, and then from the side will be installed in the head tool rod, rotating knife stem can take away and work out smooth deburring complete surface. Another type of seal is the material polyurethane sealing ring Y form because of its high hardness and high elastic, oil resistance, abrasion resistance and low temperature resistance, etc, widely used in hydraulic oil cylinder. Its inside and outside lip with or hole according to the shaft can be made with different sizes to shape a seal and their own protection. Lip "Y" pattern circle with different sizes, the shorter lip and sealing surface contact, sliding friction small resistance, good abrasion resistance, long life. Long lip with the relative motion surface have larger the compression, at work there still. Because of polyurethane material Y shape circle high hardness, the compression, installation, replaced by the sealing ring is often "crowded broken, rolled and bite border damage phenomenon, which should be not a sealing effect, and even failure. Assembly, we used a screwdriver along the cylinder size will the sealing lip to pressure; Or with fine wire will seals tightly bound the lip, make its outer diameter less than the inner diameter of the cylinder, and then will sealing ring to send people in cylinder, again will fine wire spare. But the two are easily will scratch outfit law sealing ring, lead to sealing failure, increased maintenance time. In view of this situation, we use 0.
LMM thick cold rolling with or TongPi will cut into the square, its length equal to the Y form the circumference of the outer circle, then use it will seal up tight, and then bit by bit for hydraulic cylinder cylinder, to Rotary joint the lips mouth all into the cylinder again after the spare, install the effect is good.
Hole combination sealing ring with the o-ring and wear-resisting of ring. Because o-ring elastic bigger, installation is easy; and wear-resisting ring elastic is bad, if installed directly is the steps, the piston to scratch the surface of the seal grooves, affect the sealing effect.
To ensure that wear-resisting ring installation without being damaged, should take certain measures of installation. Wear-resisting ring mainly by filling polytetrafluoroethylene (PTFE) material is made, has the characteristics of corrosion resistance, thermal expansion coefficient is bigger, so before installation in the 100 ℃ in the oil for 20 min, make its gradually become soft, then use figure 2 shows the tooling with loading of the piston in groove. Figure 2 shows the positioning sets up and fixtures of composition. Positioning set five º angle pouring head, used to Capsule Slip Rings direct the o-ring and wear-resisting with loading at the end of the piston ring groove.
Set up by elastic good 65 Mn steel made by heat treatment, processed into uniform symmetrical 8 disc structure. Note that each disc at the bottom of the hole processing, dividing uniformly, milling open the disc should make JuKou aimed at the center of the holes, in order to ensure that each disc can even up set up open. At the same time, each place should be made (smooth) chamfering, lest damage sealing ring. Each kind of specification of the sealing ring should be a corresponding tooling to ensure that it is assembly requirements. After the installation is complete don't allow sealing ring is distorted, becoming wrinkly, scratch and put the phenomenon exists. The hydraulic cylinder cylinder, cylinder thread in the hole in the welding process often arranges after processing, this will inevitably be threaded hole in export and cylinder wall at the junction of produce burr. For the removal burr, must design the special cutting tools to make the processing, to achieve the purpose of a smooth transition. Special cutting tools of structure see chart 4. When using, the first knife stem from the threaded hole into, and then from the side will be installed in the head tool rod, rotating knife stem can take away and work out smooth deburring complete surface. Another type of seal is the material polyurethane sealing ring Y form because of its high hardness and high elastic, oil resistance, abrasion resistance and low temperature resistance, etc, widely used in hydraulic oil cylinder. Its inside and outside lip with or hole according to the shaft can be made with different sizes to shape a seal and their own protection. Lip "Y" pattern circle with different sizes, the shorter lip and sealing surface contact, sliding friction small resistance, good abrasion resistance, long life. Long lip with the relative motion surface have larger the compression, at work there still. Because of polyurethane material Y shape circle high hardness, the compression, installation, replaced by the sealing ring is often "crowded broken, rolled and bite border damage phenomenon, which should be not a sealing effect, and even failure. Assembly, we used a screwdriver along the cylinder size will the sealing lip to pressure; Or with fine wire will seals tightly bound the lip, make its outer diameter less than the inner diameter of the cylinder, and then will sealing ring to send people in cylinder, again will fine wire spare. But the two are easily will scratch outfit law sealing ring, lead to sealing failure, increased maintenance time. In view of this situation, we use 0.
LMM thick cold rolling with or TongPi will cut into the square, its length equal to the Y form the circumference of the outer circle, then use it will seal up tight, and then bit by bit for hydraulic cylinder cylinder, to Rotary joint the lips mouth all into the cylinder again after the spare, install the effect is good.
Select the valve seals face materials shall be taken into consideration when what factors
Select the valve seal face material should be <a href="http://www.electricslipring.com/revolving-joints.html">revolving joint</a> consider the following factors:
(1) corrosion. "Corrosion" that is under the action of sealing surface in the media, the surface damage of the process. If the surface of this damage, sealing can't assure, therefore, seal face materials must corrosion. The material corrosion resistance of the mean depends on the material and the extreme chemical stability.
(2) scratch resistant. "Scratch", that is, the seal faces relative motion process, because of <a href="http://www.electricslipring.com/through-bore-slip-rings-rotaryjoint-rotary-joints.html">through bore slip rings</a> friction material and cause damage. This damage must cause the destruction of the sealing surface, therefore, seal face materials must be of good scratch resistant performance, the institution is a gate valve. Scratch resistance of the material sex is often of material internal properties of the decision.
(3) corrosion proof. "Erosion", that is, high speed flows through the medium sealing surface, make the destruction of sealing surface process. This kind of destruction in high temperature and high pressure steam medium the throttle valve and relief valve use is more evident, and the influence of sealing failure, therefore, corrosion proof is also one of the important requirements of sealing surface material.
(4) should have a certain degree of hardness, and provisions for operating temperature of the big drop occurred in the hardness.
(5) seal face and body materials should be steels are similar, with the structure of the <a href="http://www.electricslipring.com/miniature-slip-rings.html">Miniature Slip Rings</a> is more important, in order to avoid the high temperature easy to generate additional stress and cause loose.
6 in high temperature condition use, want to have enough antioxidant, thermal fatigue sex and thermal cycle.
In the present situation, to <a href="http://www.electricslipring.com/capsule-slip-rings.html">Capsule Slip Rings</a> meet the requirements of the overall find sealing surface material is very hard to do, can be according to different valve class and use, key meet certain requirements. For example, in the medium of the valve should pay special attention to <a href="http://www.electricslipring.com/">slip ring</a> using the sealing surface corrosion proof requirements; and in the medium containing solid impurity should choose hardness higher sealing face of the material.
2012年7月1日星期日
Special and electric annulus introduces mine promotion machine
A kind of appropriative that works as mine carries equipment, according to its different principle, can make undertake in order to
revolving joints twine type and attrition type classified normally, still can divide the rope that it is and much rope according to different structure, tower type and be born type are waited a moment. Can use electric annulus regard promotion as the power of machine, signal in applying actually carry crucial part.
Extensive definition, can include the category in promotion machine like the equipment such as elevator, firm car, crane inside. rope twines type is the time that appear and uses longer, internal composition wants relatively simple, but dependability effect is tall, can apply in deepness only below more shallow well, and loading capacity effect is little. Below rotaryjoint rotary joints deep well environment, because load is heavy the amount is larger, rope coil winding machine is restricted in the use in deep well by end. The effective settlement of attrition type the defect of rope pattern. But because deep well deepness is deeper, the fluctuant value of static stress also as greaten. Usually deepness does not exceed 1500 meters, still can use machine of attrition type promotion. Much rope Miniature Slip Rings pattern and rope pattern are same on the principle, advocate differ on the way that if promote steel the rope,winds, structure.
Because use, is much rope is twined, reliable function promotes greatly, because this can suit,be in deep well, extradeep well. Promotion engine is main by part of indicator of device of electromotor, decelerate, deepness, main shaft, control the part such as system, operating system is formed. Promotion machine regards the motivation of mine hoist as the system, electric annulus offerred stable signal, the sources of energy to transmit plan in braking system all. Domestic mine promotes the deepness indicator with machine commonly used place to Capsule Slip Rings basically have disc type now with memorial archway type. Deserve to have alarm bell on deepness indicator, in order to hints the driver makes decelerate operation in the begining in decelerate. Promotion machine falls in working status, the locomotive voice that must notice machine component is unusual, the establishment such as lamplight of signal of condition of deepness indicator index, appearance is normal, steel rope is placed degree discrepant often wait. Rotary joint
Extensive definition, can include the category in promotion machine like the equipment such as elevator, firm car, crane inside. rope twines type is the time that appear and uses longer, internal composition wants relatively simple, but dependability effect is tall, can apply in deepness only below more shallow well, and loading capacity effect is little. Below rotaryjoint rotary joints deep well environment, because load is heavy the amount is larger, rope coil winding machine is restricted in the use in deep well by end. The effective settlement of attrition type the defect of rope pattern. But because deep well deepness is deeper, the fluctuant value of static stress also as greaten. Usually deepness does not exceed 1500 meters, still can use machine of attrition type promotion. Much rope Miniature Slip Rings pattern and rope pattern are same on the principle, advocate differ on the way that if promote steel the rope,winds, structure.
Because use, is much rope is twined, reliable function promotes greatly, because this can suit,be in deep well, extradeep well. Promotion engine is main by part of indicator of device of electromotor, decelerate, deepness, main shaft, control the part such as system, operating system is formed. Promotion machine regards the motivation of mine hoist as the system, electric annulus offerred stable signal, the sources of energy to transmit plan in braking system all. Domestic mine promotes the deepness indicator with machine commonly used place to Capsule Slip Rings basically have disc type now with memorial archway type. Deserve to have alarm bell on deepness indicator, in order to hints the driver makes decelerate operation in the begining in decelerate. Promotion machine falls in working status, the locomotive voice that must notice machine component is unusual, the establishment such as lamplight of signal of condition of deepness indicator index, appearance is normal, steel rope is placed degree discrepant often wait. Rotary joint
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