CN213575156U - Deep groove ball bearing for high-low-temperature high-speed motor - Google Patents
Deep groove ball bearing for high-low-temperature high-speed motor Download PDFInfo
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- CN213575156U CN213575156U CN202022474398.6U CN202022474398U CN213575156U CN 213575156 U CN213575156 U CN 213575156U CN 202022474398 U CN202022474398 U CN 202022474398U CN 213575156 U CN213575156 U CN 213575156U
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- speed motor
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Abstract
The utility model provides a deep groove ball bearing for high-low temperature high-speed motor, including bearing, bearing inner race, holder, rubber cover and the single-row steel ball of setting between the bearing inner race and the bearing outer race, the bearing inner race is located the outside of bearing, and the bearing inner race is located the inboard of bearing, and the holder is located the surface of steel ball, and the rubber cover includes rubber and metal framework, and rubber is interference fit with the bearing inner race, and metal framework's one end is located the inside of rubber. A deep groove ball bearing for high-low temperature high-speed motor, have long service life, the security performance is superior, advantage that stability is high.
Description
Technical Field
The utility model belongs to deep groove ball bearing field for aerospace motor especially relates to a deep groove ball bearing for high-low temperature high-speed motor.
Background
The bearing is a key part of the motor, and the performance and the service life of the bearing directly determine the performance and the service life of the motor. The deep groove ball bearing is generally used on the fixed side of the motor, namely, is arranged at the rear end of the motor and plays a role in relative axial displacement between the fixed shaft and the bearing box. The temperature range of the using environment of the common deep groove ball bearing is-41 ℃ to 121 ℃, the using temperature range of the deep groove ball bearing for the aerospace motor is required to be-60 ℃ to 200 ℃, the limit rotating speed is required to be 20000r/min, the deep groove ball bearing belongs to a special bearing with low temperature, high temperature and high speed, and the requirements on the service life, the reliability and the safety are high.
The motor bearing for aerospace is mostly purchased directly from imported bearings, has reliable service life, and is developed for domestic development due to the requirement of national strategy in the coming year. The deep groove ball bearing for the domestic motor at present mainly has the following problems: the service life of the bearing at high speed is generally low, and the bearing is clamped or locked due to grease failure or carbonization; the low-temperature starting torque at 60 ℃ below zero is large, the load of the motor is increased, the current is increased, and the circuit breaker protects the motor, so that the motor stops rotating; the high-speed bearing generally adopts a dustproof cover structure, so that the high-temperature and high-speed sealing performance is poor, the grease is easy to lose, and the service life of the bearing is shortened or the bearing fails in advance.
Disclosure of Invention
In view of this, the present invention provides a deep groove ball bearing for high-low temperature high-speed motor.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
the deep groove ball bearing for the high-low temperature high-speed motor comprises a bearing, a bearing inner ring, a bearing outer ring, a rubber cover and a single-row steel ball arranged between the bearing inner ring and the bearing outer ring, wherein the bearing outer ring is positioned on the outer side of the bearing, the bearing inner ring is positioned on the inner side of the bearing, symmetrical rivet holders with rivets are arranged on two sides of the outer wall of the steel ball, the steel ball is equidistantly distributed by the holder, the holder is a stamped metal riveting type holder, load distribution can be optimized, noise vibration is reduced, sufficient space lubrication is provided for lubricating grease, meanwhile, the holder adopts a nitriding process, the hardness of the holder is improved, the brittleness is reduced, the wear resistance and the plasticity of the holder are. The bearing outer ring and the rubber cover comprise rubber and a metal framework, the rubber and the bearing outer ring are in interference fit, and one end of the metal framework is located inside the rubber. The adopted type sealing rubber cover structure has the advantages that the upper lip of the rubber cover is in elastic interference fit with the outer ring sealing groove, so that grease cannot leak from the outer ring sealing groove.
Furthermore, the dustproof cover at the lower part of the rubber cover is concave inwards to form a groove, so that the bearing is favorable for storing lubricating grease.
Furthermore, the clearance between the metal framework and the outer diameter of the bearing inner ring is 0.05-0.08 mm.
Furthermore, the rubber is made of fluorosilicone rubber. The fluorosilicone rubber has good high and low temperature resistance, the use temperature range is from-70 ℃ to 310 ℃, the fluorosilicone rubber is suitable for low-temperature, high-temperature and high-speed use, and the service life of a bearing is prolonged.
Furthermore, the curvature of the bearing inner ring groove is 0.525-0.55, and the curvature of the bearing outer ring groove is 0.515-0.52. The curvature coefficient of the bearing outer ring channel groove is exchanged with the curvature coefficient of the bearing inner ring channel groove, so that the curvature of the bearing inner ring channel groove is 0.525-0.55, and the curvature of the bearing outer ring channel groove is 0.515-0.52. The curvature of the bearing inner ring groove is larger than that of the bearing outer ring groove, and the bearing is lubricated and radiated.
Furthermore, the bearing is made of army armor bearing steel. The army armor bearing steel has higher strength, the hardness of the tempered inner ring and the tempered outer ring is higher than that of stainless steel, and the service life of the bearing can be effectively ensured.
Furthermore, the grease filling amount of the bearing is 30-35%. The grease filling amount is too much, and the grease is easy to leak grease under the centrifugal action in the bearing rotation process. The grease filling amount is too small, the evaporation speed of the grease is higher, and the service life of the bearing is reduced due to premature evaporation failure of the grease. The filling content of the grease ensures that the grease is not evaporated too much at high temperature and the service life is reduced, and also ensures that the bearing starting torque is not too large at the low temperature of 60 ℃ below zero and the motor cannot be started.
Furthermore, the grease filled in the protected bearing is lithium-based synthetic high-temperature low-temperature high-speed grease.
Furthermore, the material of the metal framework is common carbon or stainless steel.
Compared with the prior art, a high low temperature is deep groove ball bearing for high-speed motor have following advantage:
a high low temperature is deep groove ball bearing for high-speed motor, this holder is punching press metal riveting formula holder, can optimize load distribution and reduce the noise vibration, for lubricating grease provides sufficient space lubrication, the holder adopts the nitrogenize technology simultaneously, improves holder hardness and reduces the fragility, improves holder wearability and plasticity to improve the bearing life-span, guarantee the high-speed operation of bearing. The upper lip of the rubber cover is in elastic interference fit with the outer ring sealing groove, so that grease cannot leak from the outer ring sealing groove, and a gap of 0.05-0.08mm is kept between the metal framework structure at the lower part of the rubber cover and the outer diameter of the inner ring. The fluorosilicone rubber has good high and low temperature resistance, the use temperature range is from-70 ℃ to 310 ℃, the fluorosilicone rubber is suitable for low-temperature, high-temperature and high-speed use, and the service life of a bearing is prolonged. The curvature coefficient of the bearing outer ring channel groove is exchanged with the curvature coefficient of the bearing inner ring channel groove, so that the curvature of the bearing inner ring channel groove is 0.525-0.55, and the curvature of the bearing outer ring channel groove is 0.515-0.52. The curvature of the bearing inner ring groove is larger than that of the bearing outer ring groove, and the bearing is lubricated and radiated. The army armor bearing steel has higher strength, the hardness of the tempered inner ring and the tempered outer ring is higher than that of stainless steel, and the service life of the bearing can be effectively ensured. The grease filling amount is too much, and the grease is easy to leak grease under the centrifugal action in the bearing rotation process. The grease filling amount is too small, the evaporation speed of the grease is higher, and the service life of the bearing is reduced due to premature evaporation failure of the grease. The filling content of the grease ensures that the grease is not evaporated too much at high temperature and the service life is reduced, and also ensures that the bearing starting torque is not too large at the low temperature of 60 ℃ below zero and the motor cannot be started. The utility model has the advantages of long service life, superior safety performance and high stability.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a schematic diagram of a deep groove ball bearing for a high-low temperature and high-speed motor according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a rubber cover of a deep groove ball for a high-low temperature high-speed motor according to an embodiment of the present invention.
Description of reference numerals:
1-a bearing; 2-bearing inner race; 3-bearing outer ring; 4-a cage; 5-glue cover; 501-rubber; 502-metal skeleton; 6-steel ball.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1-2, a deep groove ball bearing for a high-low temperature high-speed motor comprises a bearing 1, a bearing inner ring 2, a bearing outer ring 3, a retainer 4, a rubber cover 5 and a single row of steel balls 6 arranged between the bearing inner ring 2 and the bearing outer ring 3, wherein the bearing outer ring 3 is positioned on the outer side of the bearing 1, the bearing inner ring 2 is positioned on the inner side of the bearing 1, symmetrical rivet retainers 4 with rivets are arranged on two sides of the outer wall of the steel balls 6, and the steel balls 6 are equidistantly distributed by the retainer 4, the retainer 4 is a stamped metal riveting type retainer 4, which can optimize load distribution and reduce noise vibration and provide sufficient space lubrication for lubricating grease, and meanwhile, the retainer 4 adopts a nitriding process, thereby improving the hardness of the retainer 4 and reducing brittleness, improving the wear resistance and plasticity of the retainer 4, further. The rubber cover 5 comprises rubber 501 and a metal framework 502, the rubber 501 and the bearing outer ring 2 are in interference fit, and one end of the metal framework 502 is located inside the rubber 501.
The dust cap at the lower part of the rubber cover 5 is concave inwards to form a groove, which is beneficial to storing lubricating grease in the bearing 1.
The clearance between the metal framework 502 and the outer diameter of the bearing inner ring 2 is 0.05-0.08 mm. The rubber 501 is in interference fit with the bearing outer ring 3, so that grease cannot leak from a groove of the bearing outer ring 3, and the clearance between the metal framework 502 structure at the lower part of the rubber cover 5 and the outer diameter of the inner ring is 0.05-0.08 mm. The clearance between the metal dust cap and the outer diameter of the inner ring of the common bearing is 0.2-0.3mm, the clearance value between the metal framework 502 and the inner ring of the bearing 1 is compressed by 40%, and the clearance value is reduced so that the sealing structure of the rubber cap 5 is not contacted with the inner ring 2 of the bearing, the condition that the bearing 1 can rotate at high speed is ensured, and grease is prevented from overflowing as far as possible.
The rubber 501 is made of fluorosilicone rubber. The fluorosilicone rubber has good high and low temperature resistance, the use temperature range is from-70 ℃ to 310 ℃, the fluorosilicone rubber is suitable for low-temperature, high-temperature and high-speed use, and the service life of the bearing 1 is prolonged.
The curvature of the groove of the bearing inner ring 2 is 0.525-0.55, and the curvature of the groove of the bearing outer ring 3 is 0.515-0.52. For a deep groove ball bearing 1, the groove is the actual working surface of the bearing 1 and is critical to the performance and life of the bearing 1. The precision grade of the motor bearing 1 is more than or equal to P5 grade, super-finishing is needed during processing, the requirements on roundness and surface roughness are improved, the roundness is controlled to be less than or equal to 0.0015mm, the roughness of the inner raceway and the outer raceway is changed from Ra control to Rz control to be less than or equal to 3.2um, the geometric precision of the raceways is improved, the precision and the operation flexibility of the bearing 1 are improved, and the service life of the bearing 1 is ensured. In order to stably control the vibration and the noise of the bearing 1 to reach Z2/V2, the following processing method is adopted: 1) the ultra-fine inner and outer channel roughness is changed from the traditional Ra value control to the rz (Ry) value control, and the practice proves that the rz (Ry) control has obvious effect on reducing vibration and noise. 2) The ultra-precision amount of the ultra-precision inner and outer channels is strictly controlled, the ideal ultra-precision amount is phi um >2 x 2 pieces of Rz + (1-2um), the Rz value is the roughness value after grinding, and Rz is less than or equal to 3.2 um. The curvature of the groove of the inner ring 2 of the general deep groove ball bearing is less than the curvature of the groove outer ring. The groove curvature coefficient of the outer ring channel is 0.525-0.55, and the groove curvature coefficient of the inner ring channel is 0.515-0.52. The curvature coefficient of the groove of the bearing outer ring 3 is exchanged with the curvature coefficient of the groove of the inner ring, so that the curvature of the groove of the bearing inner ring 2 is 0.525-0.55, and the curvature of the groove of the bearing outer ring 3 is 0.515-0.52. The groove curvature of the bearing inner ring 2 is larger than that of the bearing outer ring 3, so that lubrication and heat dissipation are facilitated.
The control of the groove shape of the bearing channel of the ball bearing 1 realizes good half edge and poor half edge, and is more beneficial to the lubrication of the bearing 1 than the control of the groove shape of the full channel. To form the structure, the structure must be changed from the wheel, and a unitized abrasive wheel must be formed. When the grinding wheel is formed, the half 2/5 adopts a grinding wheel with 100# granularity, and the other half 3/5 adopts a grinding wheel with 120# granularity, so that a structural form with good half groove shape and slightly poor half groove shape is formed. When the bearing 1 rotates, the rotation precision of the bearing 1 is improved by means of the rotation positioning of the half-edge groove; the purpose of bidirectional improvement is achieved by increasing a lubricating oil film by means of a groove shape with a half edge difference.
The bearing 1 is made of army armor bearing steel with the model of ZGCr15 army armor bearing steel, the bearing outer ring 3 and the steel ball 6 are subjected to tempering treatment and cold treatment at the high temperature of 200 ℃, the cold treatment temperature is controlled below-60 ℃, and the heat preservation time is not less than 1h, so that the dimensional stability of the bearing 1 is ensured. The army armor bearing steel has higher strength, the hardness of the tempered inner ring and the outer ring is higher than that of stainless steel, and the service life of the bearing 1 can be effectively ensured. The high-temperature tempering treatment and the cold treatment can effectively ensure the adaptability of the bearing 1 at a low temperature of-60 ℃ and a high temperature and a low temperature of 200 ℃ and the dimensional stability of the bearing 1.
The grease filling amount of the bearing 1 is 30-35%. The grease filling amount is too much, and the grease is easy to leak out from the product under the centrifugal action in the rotation process of the bearing 1. The grease filling amount is too small, the evaporation speed of the grease is high, and the service life of the bearing 1 is shortened due to premature evaporation failure of the grease. The filling content of the grease ensures that the grease is not evaporated too much at high temperature and the service life is reduced, and also ensures that the starting torque of the bearing 1 is not too large at the low temperature of 60 ℃ below zero and the motor cannot be started.
The filling grease of the bearing 1 is lithium-based synthetic high-temperature low-temperature high-speed grease.
The metal framework 502 is made of common carbon or stainless steel, and the model is SPCC-JISG3141 or Q235.
The retainer 4 is a stamped metal riveting type retainer 4, so that load distribution can be optimized, noise vibration can be reduced, sufficient space lubrication is provided for lubricating grease, meanwhile, the retainer 4 adopts a nitriding process, the hardness of the retainer 4 is improved, the brittleness is reduced, the wear resistance and the plasticity of the retainer 4 are improved, the service life of the bearing 1 is prolonged, and the high-speed operation of the bearing 1 is ensured. The rubber 501 is in interference fit with the bearing outer ring 3, so that grease cannot leak from the groove of the bearing outer ring 3, and the clearance between the metal framework 502 structure at the lower part of the rubber cover 5 and the outer diameter of the inner ring is 0.05-0.08 mm. The bearing 1 compresses the clearance value between the metal framework 502 and the inner ring by 40 percent, and the clearance value is reduced so that the sealing structure of the rubber cover 5 is not contacted with the bearing inner ring 2, thereby ensuring the condition that the bearing 1 can rotate at high speed and simultaneously preventing grease from overflowing as much as possible. The fluorosilicone rubber 501 has good high and low temperature resistance, the use temperature range is-70 ℃ to 310 ℃, the fluorosilicone rubber is suitable for low-temperature, high-temperature and high-speed use, and the service life of the bearing 1 is prolonged. The curvature coefficient of the groove of the outer ring 3 of the bearing is exchanged with the curvature coefficient of the groove of the inner ring, so that the curvature of the groove of the inner ring 2 of the bearing is 0.525 to 0.55, and the curvature of the groove of the outer ring 3 of the bearing is 0.515 to 0.52. The groove curvature of the bearing inner ring 2 is larger than that of the bearing outer ring 3, so that lubrication and heat dissipation are facilitated. The army armor bearing steel has higher strength, the hardness of the tempered inner ring and the outer ring is higher than that of stainless steel, and the service life of the bearing 1 can be effectively ensured. The grease filling amount is too much, and the grease is easy to leak out from the product under the centrifugal action in the rotation process of the bearing 1. The grease filling amount is too small, the evaporation speed of the grease is high, and the service life of the bearing 1 is shortened due to premature evaporation failure of the grease. The filling content of the grease ensures that the grease is not evaporated too much at high temperature and the service life is reduced, and also ensures that the starting torque of the bearing 1 is not too large at the low temperature of 60 ℃ below zero and the motor cannot be started.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a high low temperature high speed motor is with deep groove ball bearing which characterized in that: the bearing comprises a bearing (1), a bearing inner ring (2), a bearing outer ring (3), a rubber cover (5) and a single-row steel ball (6) arranged between the bearing inner ring (2) and the bearing outer ring (3), the bearing outer ring (3) is arranged on the outer side of the bearing (1), the bearing inner ring (2) is arranged on the inner side of the bearing (1), symmetrical rivet holders (4) are arranged on two sides of the outer wall of the steel ball (6), the steel ball (6) are equidistantly distributed by the holders (4), the rubber cover (5) comprises rubber (501) and a metal framework (502), the rubber (501) is in interference fit with the bearing outer ring (3), and one end of the metal framework (502) is arranged inside the rubber (501).
2. The deep groove ball bearing for the high and low temperature high speed motor according to claim 1, wherein: the dustproof cover at the lower part of the rubber cover (5) is concave inwards to form a groove.
3. The deep groove ball bearing for the high and low temperature high speed motor according to claim 1, wherein: the clearance between the metal framework (502) and the outer diameter of the bearing inner ring (2) is 0.05-0.08 mm.
4. The deep groove ball bearing for the high and low temperature high speed motor according to claim 1, wherein: the rubber (501) is made of fluorosilicone rubber.
5. The deep groove ball bearing for the high and low temperature high speed motor according to claim 1, wherein: the curvature of the groove of the bearing inner ring (2) is 0.525-0.55, and the curvature of the groove of the bearing outer ring (3) is 0.515-0.52.
6. The deep groove ball bearing for the high and low temperature high speed motor according to claim 1, wherein: the bearing (1) is made of army armor bearing steel.
7. The deep groove ball bearing for the high and low temperature high speed motor according to claim 1, wherein: the grease filling amount of the bearing (1) is 30-35%.
8. The deep groove ball bearing for the high and low temperature high speed motor according to claim 6, wherein: the filling grease of the bearing (1) is lithium-based synthetic high-temperature low-temperature high-speed grease.
9. The deep groove ball bearing for the high and low temperature high speed motor according to claim 1, wherein: the metal framework (502) is made of common carbon or stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022474398.6U CN213575156U (en) | 2020-10-30 | 2020-10-30 | Deep groove ball bearing for high-low-temperature high-speed motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022474398.6U CN213575156U (en) | 2020-10-30 | 2020-10-30 | Deep groove ball bearing for high-low-temperature high-speed motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213575156U true CN213575156U (en) | 2021-06-29 |
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ID=76531574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022474398.6U Active CN213575156U (en) | 2020-10-30 | 2020-10-30 | Deep groove ball bearing for high-low-temperature high-speed motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213575156U (en) |
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2020
- 2020-10-30 CN CN202022474398.6U patent/CN213575156U/en active Active
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