Bearing assembly test bench

Abstract

The application provides a bearing combination test bench, which comprises a ground laying platform, a test bearing tool arranged on the ground laying platform, an axial loading device and a radial loading device, the test bearing tool comprises a mandrel and a test bearing arranged in the middle of the mandrel and matched with the radial loading device for loading, a gap exists between the test bearing and the ground laying platform, the radial loading device loads the test bearing in the radial direction to cause a reaction force for loading the test bearings at both ends of the mandrel in the radial direction, the ground laying platform is further provided with a driving mechanism, the output end of the axial loading device is aligned with the outer ring of the test bearing for axial loading, and the driving mechanism drives the test bearing to rotate, so that the test bench can be used for bearing radial loading simulation test through the radial loading device and axial loading state test through the axial loading device. Different influence factor detection is not needed by disassembling a detection mechanism or transferring bearings, and the test of the bearing is conveniently realized.

Description

Technical Field

[0001] This invention relates to a bearing assembly test bench. Background Technology

[0002] In the field of wind turbine main shafts, medium and large-sized bearings are commonly used. Bearings used in wind turbine main shafts are the most widely used and basic support and transmission system components in various wind turbine engines. They have a direct impact on the working condition, reliability and durability of mechanical devices. In order to provide safer and more reliable bearings for wind turbine main shafts and improve the safety performance of wind turbine operation, experiments on wind turbine bearings can simulate the actual working conditions in the laboratory, evaluate the performance of sliding bearings, and study the influence of various factors.

[0003] Modeling and loading actual operating conditions is an important method for studying medium and large bearings. Its most important feature is to simulate the actual operating conditions of the bearing. The most important control variables in medium and large bearing experiments are load, speed, and lubrication medium.

[0004] Typically, testing equipment for wind turbine bearings requires placing the bearing on a testing mechanism. Because bearings used in wind turbine main shafts are relatively large and heavy, they need to be moved before being placed under the testing mechanism. Furthermore, after testing one influencing factor, the measuring device must be changed or the bearing position moved, resulting in low efficiency and high time costs. After testing, the bearing must be moved again to test the next influencing factor, making the operation cumbersome. Moreover, current measuring mechanisms can only test one set of bearings, and cannot test multiple sets. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a bearing assembly test bench.

[0006] To achieve the above objectives, the present invention provides a bearing assembly test bench, including a floor platform, a test bearing fixture disposed on the floor platform, an axial loading device for axially loading the test bearing fixture, and a radial loading device for radially loading the test bearing fixture. The test bearing fixture includes a mandrel and a test bearing disposed in the middle of the mandrel in cooperation with the radial loading device. Test bearing housings for mounting the bearing to be tested are disposed at both ends of the mandrel and between the mandrel and the floor platform. There is a gap between the test bearing and the floor platform. The radial loading device radially loads the test bearing by creating a reaction force to radially load the bearings to be tested at both ends of the mandrel. The floor platform is also provided with a drive mechanism. The output shaft of the drive mechanism is connected to the mandrel to drive rotation to operate the bearing. The output end of the axial loading device is aligned with the outer ring of the bearing to be tested for axial loading. The drive mechanism drives the bearing to be tested to rotate. The axial loading device and the drive mechanism are respectively disposed at both ends of the mandrel to simulate the actual working conditions of the bearing.

[0007] The beneficial effects of this invention are as follows: The structure of this invention, through a floor-mounted platform and a test bearing fixture set on the platform, includes an axial loading device for applying axial loading to the test bearing fixture and a radial loading device for applying radial loading. This allows the bearing under test, located within the test bearing fixture, to withstand either radial or axial loading. It enables the testing of different influencing factors on the bearing under test at the same location. Furthermore, the radial loading device, located in the middle of the mandrel, works in conjunction with a loaded companion bearing to apply reaction force to the bearing under test. The equipment can test two sets of bearings simultaneously. During the test, the drive mechanism rotates the bearing under test, and the radial and axial loading devices apply loads to the bearing, simulating actual bearing operating conditions and testing bearing life. It can be used for both radial loading simulation tests and axial loading tests. It eliminates the need for disassembling and reassembling the testing mechanism or transferring the bearing to test different influencing factors, thus conveniently realizing bearing testing.

[0008] Furthermore, the test bearing fixture includes a radially loaded bearing housing, a pressure cap between the loaded bearing housing and the mandrel, an intermediate spacer for positioning and installing the test bearing on the test mandrel, the test bearings being installed at both axial ends of the intermediate spacer, an intermediate bushing on the mandrel with an installation space for accommodating the intermediate spacer and the test bearings; the test bearing fixture also includes a bearing bushing corresponding to the bearing to be tested, an end bushing for positioning the axial position of the outer ring of the bearing to be tested in the bearing housing to be tested, one of the bearing housings to be tested also having an axial loading block, the axial loading block being clamped between the end bushing and the output end of the axial loading device to transmit axial load to the outer ring of the bearing through the axial loading block; the mandrel also has a bearing spacer to separate the test bearings from the bearing to be tested.

[0009] By adopting the above technical solution, the pressure cap between the loading bearing housing and the mandrel can increase the load area and prevent excessive load from causing unstable force. The intermediate spacer can separate two test bearings. Through radial loading of the two test bearings, the position of the test bearings on the mandrel is slightly deformed downward. The bearing housing supports the bearing under test, which is subjected to a reaction force, and the two bearings under test are radially tested. The test bearing fixture performs radial loading by setting a radial loading bearing housing and pressure cap. The two test bearings are positioned and installed by the intermediate spacer of the test mandrel. The radial loading of the two test bearings is then transmitted to the bearing under test through the reaction force. The bearing housing is equipped with the bearing under test through the bearing bushing. The axial loading block of the bearing housing is pressed against the end bushing that positions the outer ring of the bearing under test. The relative displacement between the outer ring and the inner ring is tested by axial loading of the outer ring of the bearing under test. The mandrel is also equipped with a bearing spacer to prevent the axial relative displacement between the bearing under test and the test bearings on the mandrel.

[0010] Furthermore, the bearing housing under test has an oil inlet at the bottom of the bearing bushing for inputting lubricating oil. The lubricating oil is sprayed onto the bearing raceway through the lubricating oil channel. The oil inlet is connected to a lubrication station for inputting lubricating oil. The lubrication station is equipped with several output pipes connected to the oil inlet. A grease baffle is provided inside the intermediate bushing. The grease baffle is located at the axial openings at both ends of the intermediate bushing to block the grease from the bearing under test during operation.

[0011] By adopting the above technical solution, lubricating oil can be supplied through the oil inlet of the bearing housing and bearing bushing to lubricate the bearing and reduce friction. The lubricating oil is sprayed onto the bearing raceway through the lubricating oil channel to lubricate the bearing. The grease baffles set at both ends of the axial opening of the bushing shield the grease of the test bearing and prevent the grease carried out by the test bearing during the rotation in the simulation test from polluting the environment.

[0012] Furthermore, the radial loading device includes a radial loading arm connected to the radial loading bearing housing to load the test bearing. The radial loading arm includes a mounting part corresponding to the radial loading bearing housing and a fixing part supporting the loading arm. A radial guide rail base is provided at one end of the fixing part near the mounting part. A guide part is provided on the upper end surface of the radial guide rail base. A radial guide rail is slidably mounted on the guide part. A screw for adjusting the radial sliding of the radial guide rail on the guide part is provided in cooperation with the radial guide rail. The other end of the fixing part is connected to a loading cylinder through a radial loading fork. The loading cylinder drives the loading arm to move up and down in the vertical direction. A displacement sensor is provided in the vertical direction of the loading cylinder. The displacement sensor records the position of the cylinder and sets the limit position. The loading cylinder is connected to the radial loading base through a radial cylinder fixing seat.

[0013] By adopting the above technical solution, the radial loading device is installed in different positions through the mounting part corresponding to the radial loading bearing housing and the fixing part supporting the loading arm. The radial loading device mainly uses the loading cylinder to drive the loading arm to move up and down, applying load to the test bearing. The adjusting screw adjusts the radial guide rail to move back and forth, facilitating the installation and disassembly of the bearing in multiple positions. It can perform individual influencing factor tests on the bearing under test by removing the output position of the radial loading device, which facilitates installation during testing and disassembly after testing. The loading adopts hydraulic loading, which itself has buffering performance. The force sensor directly feeds back the force borne by the test bearing, with high accuracy. The displacement sensor records the position of the cylinder, sets the limit position and the tooling change position, improving safety performance. After recording the tooling change position, the equipment can automatically move to the appropriate position each time the tooling is changed, reducing the amount of manual operation.

[0014] Furthermore, a radial loading fixing pin is provided between the fixing part of the loading arm and the radial loading fork to fix the relative position of the loading arm and the radial loading fork; a radial fixing pin is provided on the mounting part of the loading arm to fix the radial loading bearing seat; a loading arm fixing pin is provided on the upper part of the radial guide rail corresponding to the fixing part of the loading arm; and an axial cylinder cover and a radial cylinder seat connecting pin cover are provided on the radial cylinder fixing seat.

[0015] By adopting the above technical solution, the fixing part of the loading arm and the radial loading fork are fixed by the radial loading fixing pin, which improves the integration of the loading arm and the radial loading fork. The mounting part of the loading arm and the radial loading bearing seat are connected by the radial fixing pin, which also facilitates the disconnection of the radial loading bearing seat, making the installation and disassembly process more convenient, increasing efficiency and reducing time costs.

[0016] Furthermore, the drive mechanism includes a drive motor and a coupling mounted on the drive motor. The coupling is connected to a reducer. A drive base is provided on the paving platform. The drive base has a motor base for mounting and fixing the drive motor and a reducer base for mounting the reducer. A drive adjustment screw is provided on the drive base for adjusting the axial output position of the output motor. The adjustment screw adjusts the output position of the output motor to disconnect or connect with the spindle, thereby rotating or disconnecting the bearing under test.

[0017] By adopting the above technical solution, the drive mechanism connects and rotates the spindle or disconnects it through the cooperation of the coupling and the reducer. The motor base and the reducer base installed on the drive base can improve the fixing effect of the motor and the reducer and position the installation position. By adjusting the screw, the output position of the output motor is adjusted to disconnect or connect with the spindle, thereby rotating or disconnecting the bearing under test, which facilitates the rotation or stopping of the spindle and disconnection from the drive mechanism.

[0018] Furthermore, the axial loading device is located at one end of the mandrel, the driving mechanism is located at the other end of the mandrel, the axial loading device is provided with a loading part corresponding to the bearing to be tested, the loading part is arranged corresponding to the center of the axial loading block, and the loading part is slidably arranged relative to the paving platform.

[0019] By adopting the above technical solution, the loading part of the axial loading device can be conveniently loaded onto the bearing under test. The loading part is arranged in a center corresponding to the axial loading block, which can facilitate the axial loading of the bearing by the loading part. At the same time, the sliding loading part can be moved away to offset it from the outer ring of the bearing under test, so as to replace the bearing.

[0020] Furthermore, the paving platform is equipped with a hydraulic station that provides hydraulic power, a control cabinet that monitors various parameters and operating status of the bearings, and an electrical control cabinet that provides the total power source.

[0021] By adopting the above technical solutions, the operation of the entire device is facilitated, its operational efficiency is improved, and it becomes more practical. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure in an embodiment of the present invention;

[0023] Figure 2 This is a cross-sectional structural diagram in an embodiment of the present invention;

[0024] Figure 3 for Figure 2 A magnified structural diagram at point A;

[0025] Figure 4This is a schematic diagram of the radial loading device in an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the exploded structure in an embodiment of the present invention. Detailed Implementation

[0027] The embodiments of the present invention will be further described below with reference to the accompanying drawings: Figure 1-5 As shown, the bearing assembly test bench includes a floor platform 1, a test bearing fixture 2 mounted on the floor platform 1, an axial loading device 3 for axial loading of the test bearing fixture 2, and a radial loading device 4 for radial loading of the test bearing fixture 2. The test bearing fixture 2 includes a mandrel 5 and a test bearing 6 mounted in the middle of the mandrel 5 in cooperation with the radial loading device 4. Test bearing housings 13 for mounting the bearings to be tested are located at both ends of the mandrel 5 and between the mandrel 5 and the floor platform 1. There is a gap between the test bearing 6 and the floor platform 1. The radial loading device 4 radially loads the test bearing 6 by creating a reaction force to radially load the bearings to be tested at both ends of the mandrel 5. The floor platform 1 is also equipped with a drive mechanism 7. The output shaft of the drive mechanism 7 is connected to the mandrel 5 to drive the rotation of the bearing. The output end of the axial loading device 3 is aligned with the outer ring of the bearing to be tested for axial loading. The drive mechanism 7 drives the bearing to be tested to rotate. The axial loading device 3 and the drive mechanism 7 are respectively located at both ends of the mandrel 5 to simulate the actual working conditions of the bearing.

[0028] The test bearing fixture 2 includes a radially loaded bearing housing 8, a pressure cap 9 between the loaded bearing housing and the mandrel 5, an intermediate spacer 10 for positioning and installing a test bearing 6 on the test mandrel 5, the test bearing 6 being installed at both axial ends of the intermediate spacer 10, and an intermediate bushing 11 on the mandrel 5, the intermediate bushing 11 having an installation space to accommodate the intermediate spacer 10 and the test bearing 6; the test bearing fixture 2 also includes a bearing bushing 12 corresponding to the bearing to be tested, an end bushing 14 for positioning the axial position of the outer ring of the bearing to be tested in the bearing housing 13 to be tested, one of the bearing housings 13 to be tested also having an axial loading block 15, the axial loading block 15 being clamped between the end bushing 14 and the output end of the axial loading device 3, so as to transmit axial load to the outer ring of the bearing through the axial loading block 15; a bearing spacer 16 is also provided on the mandrel 5 to separate the test bearing 6 from the bearing to be tested.

[0029] The bearing housing 13 under test has an oil inlet at the bottom of the bearing bushing 12 for inputting lubricating oil. The lubricating oil is sprayed onto the bearing raceway through the lubricating oil channel. The oil inlet is connected to a lubrication station for inputting lubricating oil. The lubrication station is equipped with several output pipes connected to the oil inlet. A grease baffle 17 is provided inside the middle bushing 11. The grease baffle 17 is located at the axial openings at both ends of the middle bushing 11 to shield the grease from the test bearing 6 during operation.

[0030] The radial loading device 4 includes a radial loading arm 18 connected to the radial loading bearing seat 8 to load the test bearing 6. The radial loading arm 18 includes a mounting part 19 corresponding to the radial loading bearing seat 8 and a fixing part 20 supporting the loading arm. A radial guide rail base 21 is provided at one end of the fixing part 20 near the mounting part 19. A guide part 22 is provided on the upper end surface of the radial guide rail base 21. A radial guide rail 23 is slidably mounted on the guide part 22. A screw for adjusting the radial sliding of the radial guide rail 23 on the guide part 22 is provided in cooperation with the guide part 22. The other end of the fixing part 20 is connected to a loading cylinder 25 through a radial loading fork 24. The loading cylinder 25 drives the loading arm to move up and down in the vertical direction. A displacement sensor 26 is provided in the vertical direction of the loading cylinder 25. The displacement sensor 26 records the position of the cylinder and sets the limit position. The loading cylinder 25 is connected to the radial loading base through a radial cylinder fixing seat 27.

[0031] A radial loading fixing pin is provided between the fixing part 20 of the loading arm and the radial loading fork 24 to fix the relative position of the loading arm and the radial loading fork 24; a radial fixing pin is provided on the mounting part 19 of the loading arm to fix the radial loading bearing seat 8; a loading arm fixing pin is provided on the upper part of the radial guide rail 23 corresponding to the fixing part 20 of the loading arm; and an axial cylinder pressure cover 28 and a radial cylinder seat connecting pin pressure cover 29 are provided on the radial cylinder fixing seat 27.

[0032] The drive mechanism 7 includes a drive motor 30 and a coupling 31 mounted on the drive motor 30. The coupling 31 is connected to a reducer 32. A drive base 33 is mounted on the paving platform 1. The drive base 33 has a motor base for mounting and fixing the drive motor 30 and a reducer base for mounting the reducer. A drive adjusting screw 34 is mounted on the drive base 33 for adjusting the axial output position of the output motor. The adjusting screw adjusts the output position of the output motor to disconnect or connect with the spindle 5, thereby rotating or disconnecting the bearing under test.

[0033] The axial loading device 3 is located at one end of the spindle 5, and the driving mechanism 7 is located at the other end of the spindle 5. The axial loading device 3 is provided with a loading part 38 corresponding to the bearing to be tested. The loading part 38 is located in center with the axial loading block 15 and is slidably arranged relative to the flooring platform 1.

[0034] The paving platform 1 is equipped with a hydraulic station 35 that provides hydraulic power, a control cabinet 36 that monitors various parameters and operating conditions of the bearings, and an electrical control cabinet 37 that provides the total power source.

[0035] The paving platform 1 is also provided with a positioning step corresponding to the position of the test bearing 6. The positioning step positions the test bearing 6 and can also prevent the mandrel 5 from abutting against it when it is excessively bent during loading, thus avoiding excessive damage to the overall device and improving safety.

[0036] The above embodiments are merely one preferred embodiment of the present invention. Ordinary variations and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included within the protection scope of the present invention.

Claims

1. A bearing assembly test bench, characterized in that: The system includes a flooring platform, a test bearing fixture mounted on the flooring platform, an axial loading device for axially loading the test bearing fixture, and a radial loading device for radially loading the test bearing fixture. The test bearing fixture includes a mandrel and a test bearing disposed in the middle of the mandrel and cooperating with the radial loading device for loading. Test bearing housings for mounting the bearings to be tested are provided between the mandrel and the flooring platform, and at both ends of the mandrel. There is a gap between the test bearing and the flooring platform. The radial loading device applies radial loading to the test bearing to generate a reaction force for radial loading of the bearings to be tested at both ends of the mandrel. The flooring platform is also equipped with a drive mechanism, the output shaft of which is connected to the mandrel to drive rotation for loading. The bearing under test is operated by axially loading the outer ring of the bearing under test with the output end of the axial loading device. The drive mechanism drives the bearing under test to rotate. The axial loading device and the drive mechanism are respectively set at both ends of the mandrel to simulate the actual working conditions of the bearing under test. The test bearing fixture includes a radial loading bearing housing, with a pressure cap between the radial loading bearing housing and the mandrel. An intermediate spacer for positioning and installing the test bearing is installed on the mandrel. The test bearing is installed at both axial ends of the intermediate spacer. An intermediate bushing is provided on the mandrel, with an installation space for accommodating the intermediate spacer and the test bearing. The test bearing fixture also includes a bearing bushing corresponding to the bearing under test. The bearing housing includes an end bushing for positioning the axial position of the outer ring of the bearing under test. One of the bearing housings also includes an axial loading block, which is sandwiched between the end bushing and the output end of the axial loading device to transmit axial load to the outer ring of the bearing under test. A bearing spacer is also provided on the spindle to separate the test bearing from the auxiliary bearing. The radial loading device includes a radial loading arm that connects to the radial loading bearing housing to load the auxiliary bearing. The radial loading arm includes a mounting portion corresponding to the radial loading bearing housing and a fixing portion supporting the radial loading arm. A radial guide rail base is located below the end of the fixing portion near the mounting portion. A guide portion is located on the upper surface of the radial guide rail base. A radial guide rail is slidably provided, and a screw for adjusting the radial sliding of the radial guide rail on the guide part is provided in conjunction with the radial guide rail; the other end of the fixed part is connected to a loading cylinder through a radial loading fork, and the loading cylinder drives the radial loading arm to move up and down in the vertical direction. A displacement sensor is provided in the vertical direction of the loading cylinder. The displacement sensor records the position of the loading cylinder and sets the limit position and tooling change position. After recording the tooling change position, the equipment can automatically move to the appropriate position each time the tooling is changed. The loading cylinder is connected to a radial loading base through a radial cylinder fixing seat; a radial loading fixing pin is provided between the fixing part of the radial loading arm and the radial loading fork to fix the relative position of the radial loading arm and the radial loading fork.The mounting portion of the radial loading arm is provided with a radial fixing pin to fix the radial loading bearing seat. The upper part of the radial guide rail, corresponding to the fixing portion of the radial loading arm, is provided with a radial loading arm fixing pin. The radial cylinder fixing seat is provided with an axial cylinder cover and a radial cylinder seat connecting pin cover. The drive mechanism includes a drive motor and a coupling mounted on the drive motor. The coupling is connected to a reducer. A drive base is provided on the paving platform. The drive base has a motor base for mounting and fixing the drive motor and a reducer base for mounting the reducer. The drive base is provided with a drive adjusting screw for adjusting the axial output position of the drive motor. The drive adjusting screw adjusts the disconnection or rotation of the bearing under test by adjusting the output position of the drive motor and the connection or disconnection with the mandrel. The axial loading device is located at one end of the mandrel, and the drive mechanism is located at the other end of the mandrel. The axial loading device is provided with a loading portion corresponding to the bearing under test. The loading portion is corresponding to the center of the axial loading block and is slidably positioned relative to the paving platform.

2. The bearing assembly test bench according to claim 1, characterized in that: The bearing housing under test has an oil inlet at the bottom of the bearing bushing for inputting lubricating oil. The lubricating oil is sprayed onto the raceway of the bearing under test through the lubricating oil channel. The oil inlet is connected to a lubrication station for inputting lubricating oil. The lubrication station is equipped with several output pipes corresponding to the oil inlet. A grease baffle is installed inside the intermediate bushing. The grease baffle is located at the axial openings at both ends of the intermediate bushing to block the grease from the bearing under test during operation.

3. The bearing assembly test bench according to claim 1, characterized in that: The paving platform is equipped with a hydraulic station that provides hydraulic power, a control cabinet that monitors various parameters and operating status of the bearings, and an electrical control cabinet that provides the total power source.

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