CN220207779U - Accelerated life degradation test bed for motor insulating bearing - Google Patents
Accelerated life degradation test bed for motor insulating bearing Download PDFInfo
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- CN220207779U CN220207779U CN202320821011.0U CN202320821011U CN220207779U CN 220207779 U CN220207779 U CN 220207779U CN 202320821011 U CN202320821011 U CN 202320821011U CN 220207779 U CN220207779 U CN 220207779U
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- fan
- motor
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- 238000006731 degradation reaction Methods 0.000 title claims abstract description 39
- 230000015556 catabolic process Effects 0.000 title claims abstract description 37
- 238000012360 testing method Methods 0.000 title claims abstract description 22
- 238000007789 sealing Methods 0.000 claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 25
- 238000005488 sandblasting Methods 0.000 claims abstract description 19
- 238000005485 electric heating Methods 0.000 claims abstract description 9
- 230000008878 coupling Effects 0.000 claims abstract description 7
- 238000010168 coupling process Methods 0.000 claims abstract description 7
- 238000005859 coupling reaction Methods 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 239000003921 oil Substances 0.000 claims description 23
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract description 22
- 239000004576 sand Substances 0.000 abstract description 3
- 230000001133 acceleration Effects 0.000 abstract description 2
- 239000002184 metal Substances 0.000 description 4
- 238000004088 simulation Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The utility model discloses a motor insulating bearing acceleration performance degradation test bed which comprises a driving motor, a transmission shaft, a sealing device, an experimental insulating bearing, a fan support, a fan, a sand blasting device, an electric heating wire, a humidifier, a radial loading device, a torque loading device, a data acquisition module, a control module, a current loading device and a base. The driving motor, the bearing support, the fan support and the sand blasting device are arranged on the base; the driving motor is connected with the transmission shaft through an insulating coupling, the experimental insulating bearing is connected with the transmission shaft after being arranged in the bearing seat, the fan, the sand blasting device, the heating wire, the humidifying device and the loading device are arranged in the sealing device, and the current loading device is connected with the experimental insulating bearing in a closed loop. The utility model can accelerate the acquisition of the full-life degradation information of the mechanical property and the insulation property of the motor insulation bearing under the high-temperature, damp-heat and sand wind environments, and provides experimental support for researching the degradation rule of the service life of the motor bearing.
Description
Technical Field
The utility model relates to a motor insulating bearing accelerated life degradation test bed.
Background
The insulated bearing is a key core component of a rail transit traction motor such as a subway, a motor train and the like, and directly influences the operation safety and the service life of the traction motor. In recent years, the problem of current damage to traction motor bearings of subway lines and subways in China is more and more serious, so that in order to ensure safe and reliable running of rail transit, insulating bearings are basically used for traction motor bearing bearings on motor cars, subways and the like.
The service life is used as the most important use index of the bearing, and the accurate determination of the service life of the bearing is a key problem in the technical field of bearings. However, the performance degradation mechanism of the existing insulated bearing has no mature theory, technology and achievement, and to ensure safe operation of the motor, the insulated bearing in actual service is not allowed to operate with diseases, and is replaced immediately once the designed service life is reached, so that it is very difficult to obtain performance degradation data of the whole service life of the insulated bearing in the service process, and even if partial data can be obtained, the price is very expensive and the time is very long.
Therefore, in order to obtain performance degradation rule data of the insulated bearing in the whole life cycle in a short time, an accelerated life degradation test bed which is close to the actual service condition of the insulated bearing is designed, and enough performance degradation data of the insulated bearing are obtained, so that a solid foundation can be laid for researching the performance degradation rule of the insulated bearing.
Disclosure of Invention
In order to solve the technical problems, the utility model provides a motor insulation bearing accelerated life degradation testing machine capable of controlling multiple environmental factors.
The technical scheme for solving the technical problems is as follows: the utility model provides a motor insulation bearing accelerates life-span degradation test bench, includes driving motor, transmission shaft, closing device, experimental insulation bearing, fan support, centrifugal fan, sand blasting unit, heating wire, humidifier, radial loading device, moment of torsion detection device, data acquisition device, control module, current loading device and base. The driving motor, the sealing device, the bearing support, the fan support, the sand blasting device, the torque detecting device and the torque loading device are arranged on the base. The airtight device is internally provided with a fan, a sand blasting device, an electric heating wire, a humidifier and a radial loading device. The experimental insulating bearing is arranged on the bearing seat and is arranged in the sealing device. The driving motor is connected with the transmission shaft through an insulating coupler, and the other end of the transmission shaft is connected with the torque acquisition device through the insulating coupler and then connected with the torque loading device through the coupler.
In the motor insulation bearing accelerated life degradation test bed, the test bed is provided with the data acquisition device for monitoring vibration, current, voltage, torque, temperature and humidity change conditions in the insulation bearing life degradation process, and the control module can control motor rotation speed, fan rotation speed, heating wire temperature, loading current and loading torque.
In the motor insulation bearing accelerated life degradation test bed, the centrifugal fan in the sealing device is arranged on the fan support, the electric heating wire is arranged in front of the fan, the spray heads of the sand blasting device are fixed in front of the fan through adjustable hoses and all face the experimental insulation bearing, silicon carbide can be sprayed onto the insulation bearing rollaway nest, and the insulation performance degradation of the bearing rollaway nest is accelerated. The sand blasting collecting device is arranged below the insulating bearing support, so that the utilization rate of the carborundum is improved conveniently.
In the motor insulation bearing accelerated life degradation test bed, the radial loading device comprises a loading oil cylinder, a loading bracket with an insulation coating and a hydraulic cylinder. The outer sides of the insulating bearing supports are respectively provided with a loading device support, the oil cylinder supports are fixed above the insulating bearing seats, two loading oil cylinders are symmetrically arranged between the oil cylinder supports and the insulating loading bearing seats, one ends of the loading oil cylinders are hinged with the hydraulic cylinder supports along the radial direction of the bearings, the other ends of the loading oil cylinders directly act on the outer rings of the insulating bearings through the insulating loading bearing seats, insulating gaskets are arranged between the loading oil cylinders and the insulating loading bearings, and the mechanical property degradation of the insulating bearings is accelerated.
In the motor insulating bearing accelerated life degradation test bed, the current loading device is connected with the electric brush on the transmission shaft through a wire, and the other end of the current loading device is connected to the metal rod connected with the outer ring of the insulating bearing through a wire to form a current loading closed loop.
In the motor insulation bearing accelerated life degradation test bed, the couplings at the two ends of the transmission shaft are insulation couplings, the transmission shaft penetrates through the sealing device and drives the experimental insulation bearing, and the joint of the shaft and the sealing device is provided with the insulation sealing ring, so that the sealing experimental environment of the insulation bearing is ensured, and the loading current is ensured not to leak outwards.
The utility model has the beneficial effects that:
1. according to the utility model, the centrifugal fan is combined with the sand blasting device, and the silicon carbide is circularly sprayed on the experimental insulated bearing rollaway nest, so that the insulation performance degradation of the insulated bearing rollaway nest is accelerated, and the life performance degradation data obtained through experiments are more practical.
2. According to the utility model, the driving motor is connected with the transmission main shaft through the insulating coupler, the insulating bearing is arranged on the insulating bearing seat, and the insulating sealing ring is arranged between the main shaft and the sealing device, so that the loading current in the process of accelerating the service life degradation of the bearing is only acted on the rotating shaft and the insulating bearing, multiple insulating measures are taken to prevent current leakage, the reliability of experimental data is ensured, and the safety performance of the test bed is ensured.
3. The utility model can obtain the performance degradation data of the whole life of the insulating bearing under multiple working conditions in a short time.
4. The utility model can establish performance acceleration degradation models under various motor insulating bearing working conditions (different rotating speeds, different currents, different temperatures, different humidities, temperature sand wind environments, different radial loads and different torque loads).
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present utility model.
Fig. 2 is a schematic view of the internal structure of the sealing device of the present utility model.
Fig. 3 is a cross-sectional view of the experimental insulated bearing of the present utility model in radial loading and current loading.
Detailed Description
The utility model is further described below with reference to the drawings and examples.
As shown in fig. 1-3, the current damage simulation device for the insulating bearing shaft of the subway traction motor comprises a driving motor 1, a transmission shaft 3, a sealing device 4, an experimental insulating bearing 28, a fan support 25, a centrifugal fan 15, a sand blasting device 22, an electric heating wire 17, a humidifier 5, a radial loading device, a torque loading device 8, a torque detection device 6, a data acquisition device 10, a control module 12, a current loading device and a base 13. The driving motor 1, the sealing device 4, the bearing support 23, the fan support 25, the sand blasting device 22, the torque detecting device 6 and the torque loading device 8 are arranged on the base 13. The sealing device 4 is internally provided with a fan 15, a sand blasting device 22, an electric heating wire 17, a humidifier 5 and a radial loading device. The experimental insulated bearing is arranged on the bearing seat 23 and is arranged in the sealing device 4. The driving motor 1 is connected with the transmission shaft 3 through the insulating coupler 2, and the other end of the transmission shaft 3 is connected with the torque acquisition device 6 through the insulating coupler 20 and then connected with the torque loading device 8 through the coupler 7.
The test bed is provided with a data acquisition device 10 for monitoring vibration, current, voltage, torque, temperature and humidity change conditions in the service life degradation process of the insulating bearing, and the control module 12 can control motor rotation speed, fan rotation speed, heating wire temperature, loading current and loading torque.
The centrifugal fan 15 in the sealing device 4 is arranged on the fan support 25, the heating wire 17 is arranged in front of the fan, the spray heads 16 of the sand blasting device are fixed in front of the fan through adjustable hoses 26 and face the experimental insulating bearings 28, silicon carbide can be sprayed onto the rollaway nest of the insulating bearings 28, and the insulating performance of the rollaway nest of the bearings is accelerated. The sand blast collection device 22 is mounted below the insulating bearing support 23 to facilitate improved silicon carbide utilization.
The sealing device 4 is a metal cavity, and a visual window 11 made of transparent toughened glass is arranged on one side of the cavity, so that real-time condition of accelerated service life degradation of an insulating bearing in the sealing device can be observed under the condition of ensuring personal safety.
The radial loading device comprises a loading oil cylinder 29, a loading bracket 24 with an insulating coating and a hydraulic cylinder 9. The outside of the insulating bearing support 23 is respectively provided with a loading device support 24, an oil cylinder 29 support is fixed above the insulating bearing seat, two loading oil cylinders are symmetrically arranged between the oil cylinder support 24 and the insulating bearing seat 23, the loading oil cylinder 29 is hinged with the hydraulic cylinder support along the radial direction of the bearing, one end of the loading oil cylinder 29 is directly acted on an outer ring of the insulating bearing through the insulating loading bearing seat, and an insulating gasket 27 is arranged between the loading oil cylinder and the insulating loading bearing.
The current loading device is connected with an electric brush 18 on the transmission shaft 3 through a wire, and the other end of the current loading device is connected with a metal rod 19 connected with the outer ring of the insulated bearing through a wire 31 to form a current loading closed loop.
The humidifier 5 can increase the air humidity in the sealing device 4 and accelerate the deterioration of the insulation performance.
The shaft couplings at the two ends of the transmission shaft 3 are all insulating couplings, the transmission shaft penetrates through the sealing device 4 and drives the experimental insulating bearing 28, insulating sealing rings 14 and 21 are arranged at the joint of the shaft and the sealing device, the sealing experimental environment of the insulating bearing is ensured, and the loading current is ensured not to leak outwards.
The working principle of the utility model is as follows:
1. accelerated insulation bearing insulation performance degradation portion: the driving motor 1 drives the transmission shaft 3 to rotate through the insulating coupler 2, and the transmission shaft 3 drives the inner ring of the experimental insulating bearing 28 in the insulating bearing seat 23 to rotate. The sand blasting device 22 ejects the carborundum from the spray head 16 through the adjustable hose 26, and blows the carborundum onto the insulated bearing roller path through the centrifugal fan 15, so that abrasion and falling of the insulated coating of the insulated bearing 28 are accelerated.
2. Accelerating the mechanical property degradation part of the insulating bearing: a loading device bracket 24 is fixed above the insulating bearing seat 23, two loading oil cylinders 29 are symmetrically arranged between the bracket and the bearing seat, and the oil cylinders directly act on the outer ring of the insulating bearing 28 through the insulating bearing seat 23 to load symmetrical radial loads. The torque loading device 8 at the tail end of the transmission shaft 3 loads the torque load for the test bearing, and the mechanical property degradation of the insulating bearing is accelerated.
3. Shaft current loading section: one is connected to the electric brush 18 of the transmission shaft 3 and the other is connected to the metal conductive rod 19 connected with the outer ring of the experimental insulated bearing 28 through two wires of the control module 12, a current loading loop is formed on the insulated bearing 28, and the pulse current is applied to break through the insulating coating on the inner ring roller path and the outer ring roller path of the insulated bearing 28, so that the shaft current is damaged.
4. Motor temperature simulation loading part: the heat generated by the electric heating wire 17 is transferred to the experimental insulating bearing 28 through the centrifugal fan 15, so that the temperature rise in the operation of the traction motor can be simulated, and the performance degradation of the insulating bearing can be accelerated.
5. Motor humidity simulation loading part: the working environment with different humidity is provided for the sealing device 4 through the humidifier 5.
Claims (5)
1. The accelerated life degradation test bed for the motor insulating bearing is characterized by comprising a driving motor, a transmission shaft, a sealing device, an experimental insulating bearing, a fan support, a centrifugal fan, a sand blasting device, an electric heating wire, a humidifier, a radial loading device, a torque detection device, a data acquisition device, a control module, a current loading device and a base; the driving motor, the sealing device, the bearing support, the fan support, the sand blasting device, the torque detecting device and the torque loading device are arranged on the base; a fan, a sand blasting device, an electric heating wire, a humidifier and a radial loading device are arranged in the sealing device; the experimental insulating bearing is arranged on the bearing seat and is arranged in the sealing device; the driving motor is connected with the transmission shaft through an insulating coupler, and the other end of the transmission shaft is connected with the torque acquisition device through the insulating coupler and then connected with the torque loading device through the coupler.
2. The accelerated life degradation test stand of the motor insulating bearing according to claim 1, wherein the test stand is provided with a data acquisition device for monitoring vibration, current, voltage, torque, temperature and humidity changes in the insulating bearing damage process, and the control module can control motor rotation speed, fan rotation speed, heating wire temperature, loading current and loading torque.
3. The accelerated life degradation test stand of the motor insulating bearing according to claim 1, wherein a centrifugal fan in the sealing device is arranged on a fan support, an electric heating wire is arranged in front of the fan, a spray head of the sand blasting device is fixed in front of the fan through an adjustable hose and faces the experimental insulating bearing, and silicon carbide can be sprayed onto an insulating bearing raceway to accelerate degradation of insulating performance of the bearing raceway; the sand blasting collecting device is arranged below the insulating bearing support.
4. The accelerated life degradation testing stand of a motor insulating bearing of claim 1, wherein the radial loading device comprises a loading oil cylinder, a loading bracket with an insulating coating and a hydraulic cylinder; the outer sides of the insulating bearing supports are respectively provided with a loading device support, the oil cylinder supports are fixed above the insulating bearing seats, two loading oil cylinders are symmetrically arranged between the oil cylinder supports and the insulating loading bearing seats, one ends of the loading oil cylinders are hinged with the hydraulic cylinder supports along the radial direction of the bearings, the other ends of the loading oil cylinders directly act on the outer rings of the insulating bearings through the insulating loading bearing seats, and insulating gaskets are arranged between the loading oil cylinders and the insulating loading bearings.
5. The accelerated life degradation test stand of the motor insulating bearing according to claim 1, wherein the couplings at two ends of the transmission shaft are insulating couplings, the transmission shaft penetrates through the sealing device and drives the experimental insulating bearing, and an insulating sealing ring is arranged at the joint of the shaft and the sealing device, so that the sealing experimental environment of the insulating bearing is ensured, and meanwhile, the loading current is ensured not to leak outwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320821011.0U CN220207779U (en) | 2023-04-13 | 2023-04-13 | Accelerated life degradation test bed for motor insulating bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320821011.0U CN220207779U (en) | 2023-04-13 | 2023-04-13 | Accelerated life degradation test bed for motor insulating bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220207779U true CN220207779U (en) | 2023-12-19 |
Family
ID=89151066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320821011.0U Active CN220207779U (en) | 2023-04-13 | 2023-04-13 | Accelerated life degradation test bed for motor insulating bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220207779U (en) |
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2023
- 2023-04-13 CN CN202320821011.0U patent/CN220207779U/en active Active
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