Timken in 2010 International Wind Energy Conference and Exhibition unveiled products include:
( 1 ) New UltraWind Timken tapered roller Angular contact ball bearing , with Germanischer Lloyd (Germanischer Lloyd) certified the industry's highest rated life . This large aperture spindle bearings simplified drivetrain design , saving equipment costs ;
( 2 ) The new Timken? Antifriction bearings, including cylindrical roller bearings and spherical roller Ball bearing company : Compared to standard cylindrical roller bearings or spherical roller bearings, bearing this breakthrough technology will extend bearing life expectancy threefold. This new antifriction bearings can be reduced by up to 15 percent of torque, and can withstand abrasions , scratches , vibration and micro pitting corrosion and other damage ;
( 3 ) three new wind seal products, including : EcoTurn labyrinth , its non -contact design prevents grease leaks and contamination , ideal for Timken's low-pressure lubrication system ; Elastomer wind seal , in the design of the elastic sealing lip , can cope with the bearing deflection , and makes friction and minimize wear of the bearing inner ring ; , and wind seal PTFE , with excellent chemical inertness and low friction characteristics , helps to maximize product performance ;
( 4 ) of new wind energy equipment lubrication systems, precisely and evenly inject fresh grease lubricated bearings at the same time slot , can remove the old grease, significantly enhanced mechanical and electrical equipment performance and wind can produce . Its use is equipped with progressive or injector -based transmission -type centralized grease lubrication device ;
( 5 ) New frequency induction heaters , new frequency induction heaters , Timken? Clean steel , online intelligent monitoring systems , and Timken bearings company-specific Syber advanced wind energy systems analysis software performance products .
2013年9月28日星期六
2013年8月21日星期三
Type of angular contact ball bearings
Angular contact ball bearings: 7000C-type (α = 15 °), 7000AC type (α = 25 °) and 7000B (α = 40 °) of several types. This kind of bearing locking in the outer ring, inner and outer rings can not be separated, can be combined radial and axial loads and axial loads in one direction. Axial load capacity determined by the contact angle, the contact angle is larger, the ability to withstand high axial loads. This kind of bearing shaft or housing to limit axial displacement in one direction. Contact ball bearing high speed limit, you can support radial load and axial load can also be subject to pure axial load, axial load capacity determined by the contact angle, and with the contact angle increases.
Single row angular contact ball bearings
Single row angular contact ball bearing can withstand axial load in one direction, the radial load, will cause additional axial force must be applied to the corresponding reverse load, therefore, the types of bearings are generally used in pairs. Double row angular contact ball bearings can withstand greater radial load mainly radial and axial joint load and moment load, it can limit the bi-axial displacement of shaft or housing, the contact angle of 30 degrees.
Angular contact ball bearings installed in pairs
Installed in pairs of angular contact ball bearings can bear radial load mainly radial and axial joint load can also be subject to pure radial loads. Tandem configuration can only bear axial load in one direction, the other two configurations can withstand axial load in either direction. This type of bearings are generally manufacturers matching pairs of user submitted after installation preload interference, rings and balls in the axial pre-load condition, thereby enhancing the entire group as a single bearing support stiffness and rotation Accuracy
Single row angular contact ball bearings
Single row angular contact ball bearing can withstand axial load in one direction, the radial load, will cause additional axial force must be applied to the corresponding reverse load, therefore, the types of bearings are generally used in pairs. Double row angular contact ball bearings can withstand greater radial load mainly radial and axial joint load and moment load, it can limit the bi-axial displacement of shaft or housing, the contact angle of 30 degrees.
Angular contact ball bearings installed in pairs
Installed in pairs of angular contact ball bearings can bear radial load mainly radial and axial joint load can also be subject to pure radial loads. Tandem configuration can only bear axial load in one direction, the other two configurations can withstand axial load in either direction. This type of bearings are generally manufacturers matching pairs of user submitted after installation preload interference, rings and balls in the axial pre-load condition, thereby enhancing the entire group as a single bearing support stiffness and rotation Accuracy
2013年8月9日星期五
Knowledge of angular contact ball bearings
First, the process planning principles:
1, the quality principles. Must be processed according to the process of the final product quality to meet the requirements of the relevant drawings or documents.
2, the benefit principle. Consider the production arrangement to facilitate and enhance productivity and so on.
3, the economic principles. Meet the requirements of the premise, considering the possibility of reducing costs.
4, taking into account the operator's labor intensity, and environmental protection.
Second, the process of the preparation of the basic steps:
A familiar figure and related products enterprise standards and national standards and customer requirements.
2, to understand the various requirements of rough drawings.
3, the proposed process route, select Positioning benchmarks and installation.
4 Select allowance, calculated step size to determine the conditions and test methods.
5, to determine each step processing equipment. Process is determined, you must first process test, verify its correctness, rationality, economy and so on. Meanwhile, the process has a temporary and relative, production processes used will change because of some objective conditions necessary to make the appropriate adjustments.
Three, angular contact ball bearing Basics:
1, the contact angle: the rolling element and raceway contact points or the midpoint of the line of contact with the radial tangent plane angle. A
There are two different kinds of bearings can contact angle (such as tapered roller bearings), the general said contact angle refers to the external antennae.
Angular contact ball bearings can withstand radial and axial load, but also can withstand pure axial load. As the contact angle increases,
It can withstand axial load increases. High speed limit.
The same dimensions, sometimes depending on the required load bearing different, can be designed to be non-loaded ball gap and the ball gap two kinds. There ball gap can hold more of the ball, can withstand greater loads, but using lower speed. There is also a relatively unique double row angular contact ball bearings, the so-called first generation wheel hub bearing, there are two inner ring and an outer ring.
2, angular contact ball bearings precision. Is divided into five,
0,6,5,4,2-level, followed by level from low to high. General Bearing logo on the back, preceded by the letters P, and use the "/" separated, such as 7203C/P4, but not marked P0 stage omitted. Different accuracy levels have different sizes and rotation precision tolerances, the higher the level, the higher the finished product required, thus the component parts of the various requirements are also higher.
3 clearance. Four-point contact ball bearings and double row angular contact ball bearing axial clearance required national standards. Four-point contact ball bearing axial clearance points
C2, C0, C3, C4 four groups, double row angular contact ball bearing axial clearance of C2, C0, C3 three groups, C2 smallest group, C0 group does not identify the product. There are also some clearance requirements may not be assembled according to the national standard,
Mainly based on customer specific requirements adoption. Single row angular contact ball bearing clearance is no uniform requirement, but to control the contact angle tolerances, product drawing generally marked radial clearance requirements.
1, the quality principles. Must be processed according to the process of the final product quality to meet the requirements of the relevant drawings or documents.
2, the benefit principle. Consider the production arrangement to facilitate and enhance productivity and so on.
3, the economic principles. Meet the requirements of the premise, considering the possibility of reducing costs.
4, taking into account the operator's labor intensity, and environmental protection.
Second, the process of the preparation of the basic steps:
A familiar figure and related products enterprise standards and national standards and customer requirements.
2, to understand the various requirements of rough drawings.
3, the proposed process route, select Positioning benchmarks and installation.
4 Select allowance, calculated step size to determine the conditions and test methods.
5, to determine each step processing equipment. Process is determined, you must first process test, verify its correctness, rationality, economy and so on. Meanwhile, the process has a temporary and relative, production processes used will change because of some objective conditions necessary to make the appropriate adjustments.
Three, angular contact ball bearing Basics:
1, the contact angle: the rolling element and raceway contact points or the midpoint of the line of contact with the radial tangent plane angle. A
There are two different kinds of bearings can contact angle (such as tapered roller bearings), the general said contact angle refers to the external antennae.
Angular contact ball bearings can withstand radial and axial load, but also can withstand pure axial load. As the contact angle increases,
It can withstand axial load increases. High speed limit.
The same dimensions, sometimes depending on the required load bearing different, can be designed to be non-loaded ball gap and the ball gap two kinds. There ball gap can hold more of the ball, can withstand greater loads, but using lower speed. There is also a relatively unique double row angular contact ball bearings, the so-called first generation wheel hub bearing, there are two inner ring and an outer ring.
2, angular contact ball bearings precision. Is divided into five,
0,6,5,4,2-level, followed by level from low to high. General Bearing logo on the back, preceded by the letters P, and use the "/" separated, such as 7203C/P4, but not marked P0 stage omitted. Different accuracy levels have different sizes and rotation precision tolerances, the higher the level, the higher the finished product required, thus the component parts of the various requirements are also higher.
3 clearance. Four-point contact ball bearings and double row angular contact ball bearing axial clearance required national standards. Four-point contact ball bearing axial clearance points
C2, C0, C3, C4 four groups, double row angular contact ball bearing axial clearance of C2, C0, C3 three groups, C2 smallest group, C0 group does not identify the product. There are also some clearance requirements may not be assembled according to the national standard,
Mainly based on customer specific requirements adoption. Single row angular contact ball bearing clearance is no uniform requirement, but to control the contact angle tolerances, product drawing generally marked radial clearance requirements.
Angular contact ball bearings grinding super process planning
Real craft card shall state each step of the process parameters of the product requirements, such as grinding outer channel step, specify a channel diameter, roundness, ditch location, groove curvature, channel shape, roughness and other requirements, as well as workpiece speed, wheel speed, eccentricity, bearing angle, light grinding time and other parameters.
The process should be based on the processing site and precision requirements, the provisions of a good size, shape and position tolerances, roughness and other requirements. Geometric tolerance tolerance refers to the shape and position tolerances. Form tolerances are: ① face flatness; ② oval and cylindrical inner and outer diameters degree; ③ channel curvature ellipse, roundness error, etc.; raceway oval, angular deviation, straightness and so on. Position tolerances are: ① width variation; ② center of the channel parallel to the base surface; ③ the inner diameter of the inner vertical face of the base, the outer diameter of the base of the vertical plane; ④ channel inside diameter, outside diameter of the beating ;
P4 class bearings:
P4 class bearings generally use high speed, a variety of performance is higher, so the process more than the average product, the process requirements are relatively high.
a. outer grinding process route (one kind):
Coarse grind coarse face → face → OD → coarse coarse coarse outer diameter of the channel → → → coarse slope stability tempering → fine
OD grinding mill channel → → → stable tempered OD grinding lapping end → → → grinding diameter grinding outer diameter grinding channel → →
Ultra-fine grinding slope → → Lapping OD channel
I generally coarse than finely ground margin, margin finely grinding off than a large margin, grinding allowance should be noted that appropriate margin is too large, easy to cause deformation and burn rings, too little margin, unable to produce the next process step on the road to eliminate errors and generate scrap, usually talk about the amount of inner and outer diameters of the left direction. Positioning surface or bearing surface should be higher than under the procedures of various shape and position tolerances higher. End mill grinding amount should be possible to make both ends, as in the vertical shaft surface grinder grinding double face, should be non-base surface grinding, regrinding the base surface, the base surface of the ferrule OD, ID, channel, etc. processing procedures, testing benchmarks, also bearing assembly, installation benchmarks. Vertical Spindle Surface Grinding face grinding, the grinding non-base surface to determine the size. Double face grinding mill double face, generally by adjusting both sides of the wheel speed to reach both ends of the grinding amount equal to the surface than the narrow end ferrule wide wheel speed is high. Mill channel, the coarse and fine grinding, the groove position can be made when the base surface (a ramp) offset a little bit of control (must be strictly controlled, calculated or drawing comparison to determine), due to the relatively small margin may be appropriate to avoid the phenomenon of the channel while there is no wear. As outer bearing surface to improve the accuracy of positioning or support for the removal of the last printing, the need for the grinding margin is generally 1 ~ 2μ. Ultra-fine grinding locking channel generally placed after the ultra-precision relative pair due to difficult to control when they need to try to channel grinding tolerances few more compression to ensure locking height headroom height when grinding locking can stay 6 ~ 10μ (unilateral margin). If the ultra-fine grinding locking on channel after channel side easily in the presence of glitches, seriously affecting product performance (vibration, life, etc.).
P0-bearing:
Outer grinding process route (one kind):
Coarse face → (coarse grind end) → → coarse channel coarse outer slopes → → coarse grinding OD → (grinding diameter) → Channel → grinding ultra-fine grinding trench slope → → fine Grinding Lapping OD OD →
b. inner grinding process route (one kind):
Coarse face → face → coarse coarse grind coarse channel inner and outer → → → coarse inner diameter grinding coarse ramp → → Research
→ OD grinding mill grinding diameter channel → → → ultra-fine grinding trench slope
The upper process is not unique, each enterprise and the device should be based on the situation, the strength of technology and control methods for the preparation, etc., to adjust, particularly when grinding the inner ring, a bearing inner ring channel and the inner or outer bearing grinding channel mill channel.
While some also require grinding outer diameter of the ferrule there are many structures, the need to carefully analyze the product structure and geometric tolerances, roughness and other requirements, the preparation of grinding processes.
angular contact ball bearing assembly process preparation:
Assembly process must ensure that the assembled product assembly diagram products fully comply with the requirements, as well as other requirements of the project, such as residual magnetism, typing, flexibility, and appearance. Yes assembly process technology cards, matching tables and clearance, the contact angle, the channel diameter required list and other components.
P4 level assembly process craft card:
Inner and outer rings lettering demagnetization Cleaning → Inspection → Accessories → Cleaning → ferrule ferrule surface quality inspection → → sampling channel roughness values reinspection ball rules and sub-rules value → → outer channel size sorting heating, assembly kits → radial clearance sampling precision rotation → cleaning → test → test finished appearance and flexibility, vibration detecting residual magnetism, etc. → → test → test contact angle width of the projection amount → test → cleaning, cleanliness inspection → → Inner packing rust , packing (packing list according to requirements)
The contents of each step should have the instrument used and technical requirements, etc. P5 or general level, just a sampling of some processes or omitted.
The process should be based on the processing site and precision requirements, the provisions of a good size, shape and position tolerances, roughness and other requirements. Geometric tolerance tolerance refers to the shape and position tolerances. Form tolerances are: ① face flatness; ② oval and cylindrical inner and outer diameters degree; ③ channel curvature ellipse, roundness error, etc.; raceway oval, angular deviation, straightness and so on. Position tolerances are: ① width variation; ② center of the channel parallel to the base surface; ③ the inner diameter of the inner vertical face of the base, the outer diameter of the base of the vertical plane; ④ channel inside diameter, outside diameter of the beating ;
P4 class bearings:
P4 class bearings generally use high speed, a variety of performance is higher, so the process more than the average product, the process requirements are relatively high.
a. outer grinding process route (one kind):
Coarse grind coarse face → face → OD → coarse coarse coarse outer diameter of the channel → → → coarse slope stability tempering → fine
OD grinding mill channel → → → stable tempered OD grinding lapping end → → → grinding diameter grinding outer diameter grinding channel → →
Ultra-fine grinding slope → → Lapping OD channel
I generally coarse than finely ground margin, margin finely grinding off than a large margin, grinding allowance should be noted that appropriate margin is too large, easy to cause deformation and burn rings, too little margin, unable to produce the next process step on the road to eliminate errors and generate scrap, usually talk about the amount of inner and outer diameters of the left direction. Positioning surface or bearing surface should be higher than under the procedures of various shape and position tolerances higher. End mill grinding amount should be possible to make both ends, as in the vertical shaft surface grinder grinding double face, should be non-base surface grinding, regrinding the base surface, the base surface of the ferrule OD, ID, channel, etc. processing procedures, testing benchmarks, also bearing assembly, installation benchmarks. Vertical Spindle Surface Grinding face grinding, the grinding non-base surface to determine the size. Double face grinding mill double face, generally by adjusting both sides of the wheel speed to reach both ends of the grinding amount equal to the surface than the narrow end ferrule wide wheel speed is high. Mill channel, the coarse and fine grinding, the groove position can be made when the base surface (a ramp) offset a little bit of control (must be strictly controlled, calculated or drawing comparison to determine), due to the relatively small margin may be appropriate to avoid the phenomenon of the channel while there is no wear. As outer bearing surface to improve the accuracy of positioning or support for the removal of the last printing, the need for the grinding margin is generally 1 ~ 2μ. Ultra-fine grinding locking channel generally placed after the ultra-precision relative pair due to difficult to control when they need to try to channel grinding tolerances few more compression to ensure locking height headroom height when grinding locking can stay 6 ~ 10μ (unilateral margin). If the ultra-fine grinding locking on channel after channel side easily in the presence of glitches, seriously affecting product performance (vibration, life, etc.).
P0-bearing:
Outer grinding process route (one kind):
Coarse face → (coarse grind end) → → coarse channel coarse outer slopes → → coarse grinding OD → (grinding diameter) → Channel → grinding ultra-fine grinding trench slope → → fine Grinding Lapping OD OD →
b. inner grinding process route (one kind):
Coarse face → face → coarse coarse grind coarse channel inner and outer → → → coarse inner diameter grinding coarse ramp → → Research
→ OD grinding mill grinding diameter channel → → → ultra-fine grinding trench slope
The upper process is not unique, each enterprise and the device should be based on the situation, the strength of technology and control methods for the preparation, etc., to adjust, particularly when grinding the inner ring, a bearing inner ring channel and the inner or outer bearing grinding channel mill channel.
While some also require grinding outer diameter of the ferrule there are many structures, the need to carefully analyze the product structure and geometric tolerances, roughness and other requirements, the preparation of grinding processes.
angular contact ball bearing assembly process preparation:
Assembly process must ensure that the assembled product assembly diagram products fully comply with the requirements, as well as other requirements of the project, such as residual magnetism, typing, flexibility, and appearance. Yes assembly process technology cards, matching tables and clearance, the contact angle, the channel diameter required list and other components.
P4 level assembly process craft card:
Inner and outer rings lettering demagnetization Cleaning → Inspection → Accessories → Cleaning → ferrule ferrule surface quality inspection → → sampling channel roughness values reinspection ball rules and sub-rules value → → outer channel size sorting heating, assembly kits → radial clearance sampling precision rotation → cleaning → test → test finished appearance and flexibility, vibration detecting residual magnetism, etc. → → test → test contact angle width of the projection amount → test → cleaning, cleanliness inspection → → Inner packing rust , packing (packing list according to requirements)
The contents of each step should have the instrument used and technical requirements, etc. P5 or general level, just a sampling of some processes or omitted.
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