High-temperature rolling bearing non-circumferential swing test device

Abstract

The utility model belongs to the field of rolling bearing test experiments, and particularly relates to a rolling bearing high-temperature working condition simulation and motion test experiment device which comprises a swing driving device, a main shaft supporting device, a high-temperature test device and a loading device. Swinging driving force generated by a rack and a swinging gear in the swinging driving device is transmitted to a main shaft of the main shaft supporting device through a coupler to drive the main shaft to rotate in a reciprocating mode, a tested bearing is assembled on the main shaft and synchronously rotates along with the main shaft, and the high-temperature testing device is assembled on the main shaft. The environment temperature of the tested bearing is controlled by heating the main shaft, the loading device comprises an axial loading device and a radial loading device, the axial loading device provides an axial load for the tested bearing, and the radial loading device provides a radial load for the tested bearing. The device can simulate the state of the tested bearing under the condition of non-circumferential swing, and ensures the authenticity and accuracy of the test effect.

Description

Technical Field

[0001] The utility model belongs to the field of rolling bearing test experiments, and in particular relates to a rolling bearing high temperature working condition simulation and motion test device and a performance test method. Background Art

[0002] Rolling bearings are partially installed in oscillating conditions such as steering gears and are in high temperature environments. Their non-circular oscillating motion characteristics are quite different from those of traditional periodic rotary motion bearings, which can easily lead to local wear, temperature, fatigue and other faults in the load-bearing and oscillating areas, directly affecting the performance of the bearings. Therefore, it is of great significance to carry out tests that simulate real non-circular oscillation and high temperature conditions.

[0003] At present, Xu Dongdong et al. have developed a method and device for dynamic simulation test of bearing lubricating grease under high temperature environment (CN101419220A). By arranging electric heating wires inside the test box to heat the box body, and using loading springs to load radially and axially, the experiment of bearing internal lubrication changes under high temperature conditions was realized. Wang Jian et al. (High-temperature and high-speed testing machine for grease-lubricated sealed bearings) heated the outer bushing of the test bearing to simulate radial and axial loads, and realized the bearing test under high speed, high temperature and combined load. Wei Lai et al. (Study on dynamic characteristics of rotor-bearing system and evolution of bearing wear) realized the experiment and analysis of wear differences of various parts inside the rotor system at different periods through joint analysis of experimental data and system dynamics model. LIU Weidon (Mechanism analysis of deviaionsourcingand propagation for mechanical assembly) designed a special experimental device for the influence of experimental bearing assembly position differences on wear. By changing the difference in the assembly position of the test bearing in different experimental schemes under the same external load, the influence of different assembly positions of the inner and outer rings on the internal wear of the experimental bearing was obtained.

[0004] Most of the existing testing machines are for rotational periodic tests, and cannot realize non-circular periodic oscillation simulation, let alone adjustment of the inner and outer rings after oscillation. Therefore, a special high-temperature rolling bearing non-circular oscillation test device is required. Summary of the invention

[0005] The utility model aims to solve the above-mentioned deficiencies of the prior art, proposes a test device for an adjustable reciprocating drive conversion non-circular swing device, a high-temperature heating and insulation device, to achieve adjustable reciprocating swing of the non-circular angle of the bearing, and high-temperature environment simulation, and further designs a circumferential position adjustable device for the outer ring and inner ring of the bearing, to achieve adjustment of the circumferential position angle of the local load-bearing area of ​​the bearing after wear under the condition of the non-circular swing device.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following scheme: a high-temperature rolling bearing non-circular swing test device, including a swing drive device, a spindle support device, a high-temperature test device and a loading device; the swing drive force generated by the rack and the swing gear in the swing drive device is transmitted to the spindle of the spindle support device by a coupling, driving the spindle to reciprocate, and the test bearing is assembled on the spindle and rotates synchronously with the spindle. The high-temperature test device is assembled on the spindle, and the ambient temperature of the test bearing is controlled by heating the spindle. The loading device includes an axial loading device and a radial loading device. The axial loading device provides an axial load for the test bearing, and the radial loading device provides a radial load for the test bearing.

[0007] Furthermore, the high-temperature rolling bearing non-circular oscillation test device also includes a sensing test device for measuring the axial load, radial load, inner ring temperature and outer ring temperature of the test bearing, as well as the torque and deflection angle of the test bearing. The data during the test is tested and recorded by the sensing test device.

[0008] The sensor testing device specifically includes a torque sensor, an axial pressure sensor, an outer ring temperature sensor, a radial pressure sensor, and an inner ring temperature sensor.

[0009] Furthermore, the swing driving device, the main shaft supporting device, the high temperature testing device, the loading device and the sensor testing device are arranged on a fixed base.

[0010] Furthermore, the fixed base includes a base, a bracket and a horizontal adjustment bolt. The bracket is supported under the base, and the upper surface of the base is a horizontal plane. The swing drive device, the spindle support device, the high temperature test device, the loading device and the sensor test device are arranged on the base. The bracket is provided with horizontal adjustment bolts at the four corners to adjust the horizontality of the test device.

[0011] Furthermore, the swing drive device also includes a linear guide rail, a guide rail support, a gear shaft, a first bearing seat and a second bearing seat; the linear guide rail is fixed on the guide rail support, the rack is connected to the linear guide rail and displaced along the linear guide rail, the rack is meshed with the swing gear, the gear shaft is fixedly assembled in the swing gear, and both ends of the gear shaft are respectively supported by the first bearing seat and the second bearing seat; the linear displacement of the rack drives the swing gear and the gear shaft to rotate reciprocatingly, and the gear shaft transmits the torque to the main shaft.

[0012] Furthermore, the swing drive device also includes a protective shell, which covers the swing gear, the first bearing seat and the second bearing seat; the gear shaft is fixedly connected to the swing gear through a locking nut; the gear shaft is connected to the torque sensor of the sensing test device through a coupling, and the torque sensor is connected to the main shaft through a coupling. The torque and deflection angle generated by the swing drive device are measured and recorded through the torque sensor.

[0013] Furthermore, the spindle support device includes a supporting bearing seat, a spindle end cover, an adjusting chuck, an axial loading pressure rod and the spindle; a spindle end cover is fixed to the end of the spindle away from the swing driving device; a supporting bearing seat is assembled on the outside of the test bearing, the inner ring of the test bearing is interference fit with the spindle and rotates synchronously, the outer ring of the test bearing is interference fit with the supporting bearing seat, the supporting bearing seat is connected to the adjusting chuck through a tooth structure, the axial loading pressure rod is connected to the center of the side of the adjusting chuck away from the supporting bearing seat, the adjusting chuck rotates along the axis of the spindle with the axial loading pressure rod, the axial loading device is connected to the axial loading pressure rod to provide axial load to the adjusting chuck, the adjusting chuck receives the load and torque from the axial loading pressure rod, transmits them to the supporting bearing seat through the tooth structure, and further transmits them to the test bearing, so as to apply axial load to the test bearing and adjust the position of the outer ring.

[0014] Furthermore, the axial loading device includes an axial hydraulic cylinder and an axial hydraulic cylinder base, the axial hydraulic cylinder base is fixedly arranged, the axial hydraulic cylinder is assembled on the axial hydraulic cylinder base, the piston rod of the axial hydraulic cylinder is connected to the axial loading pressure rod through a hinge bearing connector, the piston rod of the axial hydraulic cylinder, the axial loading pressure rod and the axis of the main shaft coincide; an axial pressure sensor is arranged between the piston rod of the axial hydraulic cylinder and the axial loading pressure rod, and the axial pressure sensor is a device used to measure the axial load of the test bearing in the sensing test device.

[0015] Furthermore, the high-temperature test device includes a high-frequency heating device, a load-bearing module, a test module and a test box. The high-frequency heating device is arranged on the main shaft and heats the main shaft. The load-bearing module includes a load-bearing bearing and a load-bearing bearing seat. The load-bearing bearing is assembled on the main shaft, and a load-bearing bearing seat is installed outside the load-bearing bearing; the test module includes a test bearing and a test bearing seat. The test bearing is assembled on the main shaft, and a test bearing seat is installed outside the test bearing. The load-bearing module, the test module, the test bearing and the supporting bearing seat arranged outside the test bearing are enclosed in the test box, and the high-frequency heating device is arranged outside the test box. The high-frequency heating device heats the main shaft and heats the inner and outer rings of the test module, the load-bearing module and the test bearing through heat conduction.

[0016] Furthermore, the installation method of the load-bearing and test bearing is the same as that of the test bearing, the inner ring of the load-bearing bearing has an interference fit with the main shaft, and the outer ring of the load-bearing bearing has an interference fit with the load-bearing bearing seat; the inner ring of the test bearing has an interference fit with the main shaft, and the outer ring of the test bearing has an interference fit with the test bearing seat.

[0017] Furthermore, the test box is composed of a cylindrical support box and bearing covers on both sides. An adjustment pad is arranged in the test box. The adjustment pad is located below the load-bearing seat, the test bearing seat and the support bearing seat for support. The inner ring of the test bearing and the inner ring of the load-bearing bearing are limited by a spacer sleeve.

[0018] Based on the above technical solution, the spacer sleeve provides an axial clamping force for the inner ring of the test bearing, so that the inner ring of the test bearing is pressed and connected with the main shaft end cover. Under the action of the axial clamping force of the main shaft end cover and the interference fit with the main shaft, the inner ring of the test bearing and the main shaft are ensured to rotate synchronously.

[0019] Furthermore, the load-bearing bearing is a double-row roller bearing, the inner ring is arranged separately, and the two inner rings are limited by a spacer sleeve. The tested bearing, the load-bearing bearing and the accompanying test bearing are arranged on the main shaft in sequence, the stopper of the first bearing cover of the test box body abuts against the end face of the accompanying test bearing seat, the stopper of the second bearing cover of the test box body abuts against the side surface of the adjustment chuck, an O-type sealing ring is arranged between the stopper of the second bearing cover and the adjustment chuck, and the O-type sealing ring is embedded in the stopper of the second bearing cover; the accompanying test bearing and the tested bearing have the same size specifications.

[0020] Furthermore, an insulating water jacket is provided at one end of the main shaft connected to the swing driving device, and the insulating water jacket isolates heat transfer from the high-frequency heating device to the swing driving device and the torque sensor by supplying circulating water.

[0021] Furthermore, an outer ring temperature sensor is arranged inside the test box, and the outer ring temperature sensor has two temperature probes, which respectively measure the outer ring temperatures of the test bearing and the test bearing; an inner ring temperature sensor is arranged outside the test box, and the inner ring temperature sensor is an infrared temperature sensor, which measures the inner ring temperatures of the test bearing and the test bearing; the outer ring temperature sensor and the inner ring temperature sensor are devices in the sensor test device for measuring the inner and outer ring temperatures of the test bearing and the test bearing.

[0022] Furthermore, the first temperature probe of the outer ring temperature sensor passes through the adjusting pad and the supporting bearing seat, and contacts the outer ring of the test bearing for measurement. The second temperature probe of the outer ring temperature sensor passes through the adjusting pad and the test bearing seat, and contacts the outer ring of the test bearing for measurement.

[0023] Furthermore, the radial loading device includes a radial pressure rod, a radial hydraulic cylinder and a radial hydraulic cylinder base, the radial hydraulic cylinder base is fixedly arranged, the radial hydraulic cylinder is assembled on the radial hydraulic cylinder base, the piston rod of the radial hydraulic cylinder is connected to the radial pressure rod, the radial pressure rod passes through the test box and is radially supported on the load-bearing seat; a radial pressure sensor is arranged between the piston rod of the radial hydraulic cylinder and the radial pressure rod, and the radial pressure sensor is a device in the sensing test device for measuring the radial load of the test bearing.

[0024] The test method using the above-mentioned high-temperature rolling bearing non-circular oscillation test device includes a rolling bearing performance test at room temperature, a rolling bearing performance test at high temperature, and an adjustment test of non-uniform wear caused by inner and outer sleeves under non-circular motion;

[0025] The measurement parameters of the rolling bearing performance test at room temperature are the main shaft rotation angle θ and torque M, radial and axial load F x , F y , the temperature change Τ during the experiment, and at the same time, the wear degree of the inner and outer ring raceways of the test bearings is observed by a camera, wherein the test bearings are the tested bearings and the accompanying test bearings;

[0026] Test method: Install the test bearing correctly, record the initial axial position of the inner and outer rings, and set the spindle rotation angle θ and the radial and axial loads F. x , F y Two variables are used to simulate environmental conditions, and the temperature rise T of the test bearing is recorded. After a test period, the swing drive device is turned off, and the axial pressure rod is rotated to adjust the position of the inner and outer rings, and the experimental steps are repeated. After multiple experimental schemes, the test bearing is removed and the difference in internal wear of the bearing is observed;

[0027] The measurement parameters of the rolling bearing performance test under high temperature are the main shaft rotation angle θ and torque M, radial and axial load F x , F y 、Inner and outer ring temperature Τ 1 With T 2 , and at the same time, observing the wear degree of the inner and outer ring raceways of the test bearings through a camera, wherein the test bearings are the tested bearings and the accompanying test bearings;

[0028] Test method: Install the test bearing correctly, record the initial axial position of the inner and outer rings, set the ambient temperature, and heat it with a heating device. 1 With T 2 When the set test temperature is reached, stop heating and keep warm. x , F yTwo variables are used to simulate environmental conditions. During the test, the temperature changes of the inner and outer rings of the test bearing are recorded. After a test period, the swing drive device is turned off, and the axial pressure rod is rotated to adjust the positions of the inner and outer rings, and the experimental steps are repeated. After multiple experimental schemes, the test bearing is removed and the difference in internal wear of the bearing is observed.

[0029] The test method of the non-uniform wear adjustment experiment caused by the inner and outer sleeves under non-circular motion is: install the test bearing correctly, set the spindle rotation angle θ, radial and axial load F in different test time periods x , F y and other environmental variables, and then adjust the positions of the inner and outer rings of the test bearings in different time periods according to the test plan, so as to achieve the purpose of the non-uniform wear test; the specific outer ring adjustment method is to rotate the axial loading pressure rod, thereby indirectly adjusting the circumference of the outer ring of the test bearing, and the inner ring adjustment method is to rotate the main shaft in the shutdown state, thereby adjusting the circumference of the inner ring of the test bearing.

[0030] The beneficial effects of the utility model are as follows: the test device of the utility model can simulate the state of the tested bearing under the condition of non-circular swing, test the performance of the tested bearing in turn, and ensure the authenticity and accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 (a) is a schematic diagram of the overall structure of the utility model;

[0032] Figure 1 (b) is a schematic cross-sectional view of the overall structure of the utility model;

[0033] Figure 2 (a) is a schematic diagram of the structure of the swing drive device of the utility model;

[0034] Figure 2 (b) is a schematic cross-sectional view of the swing drive device of the utility model

[0035] Figure 3 This is a schematic diagram of the gear and rack matching structure principle of the utility model;

[0036] FIG4 (a) is an axonometric schematic diagram of the main shaft support device of the utility model;

[0037] Figure 4 (b) is a schematic diagram of the circumferential adjustment principle of the inner and outer rings of the utility model

[0038] Figure 5 It is a cross-sectional schematic diagram of the high temperature test device of the utility model;

[0039] Figure 6 It is a schematic diagram of the structure of the loading device of the utility model;

[0040] Figure 7 (a) is a schematic diagram of the arrangement of the sensor test device of the utility model;

[0041] FIG7 (b) is a schematic diagram of the infrared sensor measurement method of the utility model;

[0042] Figure 8 It is a schematic diagram of the base structure of the utility model;

[0043] In the figure: 1 swing drive device, 2 spindle support device, 3 high temperature test device, 4 loading device, 5 sensor test device, 6 fixed base; 11 gear shaft, 12 first bearing seat, 121 first bearing seat bearing seat, 122 first bearing seat bearing, 13 protective shell, 14 locking nut, 15 swing gear, 16 second bearing seat, 161 second bearing seat bearing seat, 162 second bearing seat bearing, 17 rack linear guide, 171 rack, 172 linear guide, 18 guide support, 19 sensor support, 21 spindle, 22 test bearing, 23 support bearing seat, 24 spindle end cover, 25 adjustment chuck, 26 axial loading pressure rod, 31 insulation water jacket, 32 high frequency heating device, 33 first bearing cover, 34 test module, 341 test bearing seat, 342 test bearing, 35 bearing module, 351 bearing bearing, 352 bearing bearing seat, 36 spacer, 37 support box, 38 second bearing cover, 381.O type sealing ring, 39 adjustment pad, 41 axial hydraulic cylinder, 42 axial hydraulic cylinder base, 43 radial pressure rod, 44 radial hydraulic cylinder, 45 radial hydraulic cylinder base, 51 torque sensor, 52 axial pressure sensor, 53 outer ring temperature sensor, 54 radial pressure sensor, 55 inner ring temperature sensor, 61 base, 62 bracket, 63 horizontal adjustment bolt. DETAILED DESCRIPTION

[0044] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0045] Referring to Figures 1-8, a high-temperature rolling bearing non-circular swing test device includes a swing drive device 1, a spindle support device 2, a high-temperature test device 3 and a loading device 4; the swing drive force generated by the rack 171 and the swing gear 15 in the swing drive device 1 is transmitted to the spindle 21 of the spindle support device by a coupling, driving the spindle 21 to reciprocate, and the test bearing 22 is assembled on the spindle 21 and rotates synchronously with the spindle. The high-temperature test device 3 is assembled on the spindle 21, and the ambient temperature of the test bearing 22 is controlled by heating the spindle 21. The loading device 4 includes an axial loading device and a radial loading device. The axial loading device provides an axial load for the test bearing 22, and the radial loading device provides a radial load for the test bearing 22.

[0046] Furthermore, the high-temperature rolling bearing non-circular oscillation test device also includes a sensor test device 5 for measuring the axial load, radial load, inner ring temperature and outer ring temperature of the tested bearing, and the torque and deflection angle of the tested bearing, and the data during the test is tested and recorded by the sensor test device 5. The sensor test device 5 specifically includes a torque sensor 51, an axial pressure sensor 52, an outer ring temperature sensor 53, a radial pressure sensor 54, and an inner ring temperature sensor 55.

[0047] Furthermore, the swing driving device 1 , the spindle supporting device 2 , the loading device 4 , the high temperature testing device 3 and the sensor testing device 6 are arranged on a fixed base 6 .

[0048] Furthermore, the fixed base 6 includes a base 61, a bracket 62 and a horizontal adjustment bolt 63. The bracket 62 is supported below the base 61. The upper surface of the base 61 is a horizontal plane. The swing drive device 1, the spindle support device 2, the loading device 4, the high temperature test device 3 and the sensor test device 6 are arranged on the base 61. The bracket 62 is provided with horizontal adjustment bolts 63 at the four corners to adjust the horizontality of the test device.

[0049] Furthermore, the swing drive device 1 also includes a linear guide 172, a guide support 18, a gear shaft 11, a first bearing seat 12 and a second bearing seat 16; the linear guide 172 is fixed on the guide support 18, the rack 171 is connected to the linear guide 172 and displaced along the linear guide 172, the rack 171 is meshed with the swing gear 15, the gear shaft 11 is fixedly assembled in the swing gear 15, and the two ends of the gear shaft 11 are respectively supported by the first bearing seat 12 and the second bearing seat 16; the linear displacement of the rack 171 drives the swing gear 15 and the gear shaft 11 to rotate reciprocatingly, and the gear shaft 11 transmits the torque to the main shaft 21.

[0050] Furthermore, the swing drive device 1 also includes a protective shell 13, which covers the swing gear 15, the first bearing seat 12 and the second bearing seat 16; the gear shaft 11 is fixedly connected to the swing gear 15 through a locking nut 14; the gear shaft 11 is connected to the torque sensor 51 of the sensor test device through a coupling, and the torque sensor 51 is connected to the main shaft 21 through a coupling. The torque and deflection angle generated by the swing drive device 1 are measured and recorded through the torque sensor 51.

[0051] Furthermore, the spindle support device 2 includes a support bearing seat 23, a spindle end cover 24, an adjustment chuck 25, an axial loading pressure rod 26 and the spindle 21; the spindle end cover 24 is fixed to the end of the spindle 21 away from the swing drive device 1; the support bearing seat 23 is assembled on the outside of the test bearing 22, the inner ring of the test bearing 22 is interference fit with the spindle 21 and rotates synchronously, the outer ring of the test bearing 22 is interference fit with the support bearing seat 23, and the support bearing seat 23 is connected to the adjustment chuck 25 through a tooth structure. The axial loading rod 26 is connected to the center of the side of the adjusting chuck 25 away from the supporting bearing seat 23. The adjusting chuck 25 rotates along the axis of the main shaft 21 with the axial loading rod 26. The axial loading device is connected to the axial loading rod 26 to provide an axial load for the adjusting chuck 25. The adjusting chuck 25 receives the load and torque from the axial loading rod 26, transmits it to the supporting bearing seat 23 through the tooth structure, and further transmits it to the test bearing 22, so as to apply the axial load to the test bearing and adjust the outer ring position.

[0052] Furthermore, the axial loading device includes an axial hydraulic cylinder 41 and an axial hydraulic cylinder base 42. The axial hydraulic cylinder base 42 is fixedly arranged, and the axial hydraulic cylinder 41 is assembled on the axial hydraulic cylinder base 42. The piston rod of the axial hydraulic cylinder 41 is connected to the axial loading pressure rod 26 through a hinge bearing connector. The piston rod of the axial hydraulic cylinder 41, the axial loading pressure rod 26 and the axis of the main shaft 21 coincide with each other. An axial pressure sensor 52 is arranged between the piston rod of the axial hydraulic cylinder 41 and the axial loading pressure rod 26. The axial pressure sensor 52 is a device used for measuring the axial load of the test bearing in the sensing test device.

[0053] Further, the high temperature test device 3 includes a high-frequency heating device 32, a bearing module 35, a test module 34 and a test box. The high-frequency heating device 32 is arranged on the main shaft 21 and heats the main shaft. The bearing module 35 includes a bearing bearing 351 and a bearing bearing seat 352. The bearing bearing 351 is assembled on the main shaft 21, and a bearing bearing seat 352 is installed outside the bearing bearing 351; the test module 34 includes a test bearing 342 and a test bearing seat 341. The test bearing 342 is assembled on the main shaft 21, and a test bearing seat 341 is installed outside the test bearing 342. The bearing module 35, the test module 34, the test bearing 22 and the support bearing seat 23 arranged outside the test bearing 22 are enclosed in the test box. The high-frequency heating device 32 is arranged outside the test box. The high-frequency heating device 32 heats the main shaft 21 and heats the inner and outer rings of the test module 34, the bearing module 35 and the test bearing 22 through heat conduction.

[0054] Furthermore, the installation method of the load-bearing bearing 351 and the test bearing 342 is the same as that of the test bearing 22, the inner ring of the load-bearing bearing 351 is interference fit with the main shaft 21, and the outer ring of the load-bearing bearing 351 is interference fit with the load-bearing bearing seat 352; the inner ring of the test bearing 342 is interference fit with the main shaft 21, and the outer ring of the test bearing 342 is interference fit with the test bearing seat 341.

[0055] Furthermore, the high-frequency heating device 32 is a high-frequency heating coil.

[0056] Furthermore, the test box is composed of a cylindrical support box 37 and bearing covers on both sides. An adjustment pad 39 is arranged in the test box. The adjustment pad 39 is located below the load-bearing seat 352, the companion bearing seat 341, and the support bearing seat 23 for support. The inner ring of the test bearing 22 and the inner ring of the load-bearing bearing 351 are limited by a spacer sleeve 36.

[0057] Based on the above technical solution, the spacer sleeve 36 provides an axial clamping force for the inner ring of the test bearing 22, so that the inner ring of the test bearing 22 is pressed and connected with the main shaft end cover 24. Under the action of the axial clamping force of the main shaft end cover 24 and the interference fit with the main shaft 21, the inner ring of the test bearing 22 and the main shaft 21 are ensured to rotate synchronously.

[0058] The load-bearing bearing 351 is a double-row roller bearing, the inner ring is arranged separately, and the two inner rings are limited by a spacer sleeve 36. The test bearing 22, the load-bearing bearing 351 and the accompanying test bearing 342 are arranged on the main shaft 21 in sequence, the stopper of the first bearing cover 33 of the test box body abuts on the end surface of the accompanying test bearing seat 341, the stopper of the second bearing cover 38 of the test box body abuts on the side surface of the adjustment chuck 25, and an O-type sealing ring 381 is arranged between the stopper of the second bearing cover 38 and the adjustment chuck 25, and the O-type sealing ring 381 is embedded in the stopper of the second bearing cover 38; the accompanying test bearing 342 and the test bearing 22 have the same size specifications.

[0059] Furthermore, an insulating water jacket 31 is provided at one end of the main shaft 21 connected to the swing driving device 1. The insulating water jacket 31 isolates heat transfer from the high-frequency heating device 32 to the swing driving device 1 and the torque sensor 51 by supplying circulating water.

[0060] Furthermore, an outer ring temperature sensor 53 is arranged inside the test box, and the outer ring temperature sensor 53 has two temperature probes, which respectively measure the outer ring temperatures of the test bearing 342 and the test bearing 22; an inner ring temperature sensor 55 is arranged outside the test box, and the inner ring temperature sensor 55 is an infrared temperature sensor, and the inner ring temperatures of the test bearing 22 and the test bearing 342 are measured by the inner ring temperature sensor 55; the outer ring temperature sensor 53 and the inner ring temperature sensor 55 are devices used in the sensor test device to measure the inner and outer ring temperatures of the test bearing 22 and the test bearing 342.

[0061] Furthermore, the first temperature probe of the outer ring temperature sensor 53 passes through the adjusting pad 39 and the supporting bearing seat 23, and contacts and measures with the outer ring of the test bearing 22. The second temperature probe of the outer ring temperature sensor 53 passes through the adjusting pad 39 and the test bearing seat 341, and contacts and measures with the outer ring of the test bearing 342.

[0062] Furthermore, the radial loading device includes a radial pressure rod 43, a radial hydraulic cylinder 44 and a radial hydraulic cylinder base 45. The radial hydraulic cylinder base 45 is fixedly arranged, and the radial hydraulic cylinder 44 is assembled on the radial hydraulic cylinder base 45. The piston rod of the radial hydraulic cylinder 44 is connected to the radial pressure rod 43. The radial pressure rod 43 passes through the test box and is radially supported on the load-bearing seat 352. A radial pressure sensor 54 is arranged between the piston rod of the radial hydraulic cylinder 44 and the radial pressure rod 43. The radial pressure sensor 54 is a device in the sensing test device for measuring the radial load of the test bearing 22.

[0063] Beneficial effects of the utility model:

[0064] (1) The swing drive device of the utility model realizes the conversion of reciprocating motion into the swing motion of the main shaft and drives the test bearing to swing at a certain angle. At the same time, the swing angle can be adjusted by controlling the distance of the reciprocating motion.

[0065] (2) The utility model has a high-frequency heating device and is combined with a temperature testing device to form a closed-loop control to achieve temperature control. It further adopts an insulating water jacket structure to achieve temperature insulation of the heated bearing and motor, etc., to avoid the influence of high temperature on other structures, thereby achieving control and simulation of the bearing working condition in a high temperature environment.

[0066] (3) The utility model provides a circumferential adjustment device for the outer ring and the inner ring, which can adjust the inner ring and the outer ring of the swing bearing along the circumferential direction to simulate the influence of the swing on the bearing wear.

[0067] (4) The utility model also has axial and radial loading devices, which can load the bearing with axial and radial loads to simulate the working conditions in a real environment.

[0068] The module structures of each part of the test device of the utility model are described as follows:

[0069] As shown in Fig. 1 (a) and (b), a high-temperature rolling bearing non-circular oscillation test machine test device includes an oscillation drive device 1, a spindle support device 2, a high-temperature test device 3, a loading device 4, a sensor test device 5, and a fixed base 6. The oscillation drive force generated by the rack linear guide 17 in the oscillation drive device 1 is transmitted to the spindle by the coupling. The insulating water jacket 31 and the high-frequency heating device 32 in the test fixture 3 realize the environmental temperature control of the test bearing 22. On the other hand, the axial hydraulic cylinder 41 and the radial hydraulic cylinder 44 in the loading device 4 load the test bearing 22, thereby simulating the actual working condition of the bearing; the data in the test is tested and recorded by the sensor test device 5, providing conditions for subsequent data processing; the above test equipment is placed on the fixed base 6.

[0070] As shown in Figure 2 (a) and (b), the swing drive device consists of a gear shaft 11, a first bearing seat 12, a bearing bearing seat 121, a bearing bearing 122 protective housing 13, a locking nut 14, a swing gear 15, a second bearing seat 16, a bearing bearing seat 161, a bearing bearing 162, a rack linear guide 17, a rack 171, a linear guide 172, a guide rail support 18, and a sensor support 19. During the implementation process, the rack linear guide 17 drives the movement of the swing gear 15 matched with it by controlling the left and right movement of the rack 171; at the same time, the swing gear 151 is placed on the gear shaft 11 and fixed by the locking nut 14, and the gear shaft 11 is kept fixed in space relative to the fixed base 6 by the first bearing seat 12 and the second bearing seat 16. At the same time, the first bearing seat 12 and the second bearing seat 16 are fixed to the guide rail support 18 and the sensor support 19 by bolts; the left side of the gear shaft 11 is connected to the torque sensor 51 in the sensor test system 5 through a coupling and transmits the swing driving force.

[0071] like Figure 3 The rack and pinion cooperate with the swing structure. The module m of the swing gear 15 and the rack 171 is pre-set as a conventional coefficient. At the same time, since the angle of one rotation of the gear is 2π, in order to better control the swing angle, the number of teeth Z is selected as a factor of 360, so that the angle of single tooth motion is θ 1 , and further obtain the displacement s of the matching rack when the swing angle is set to θ. Therefore, by adjusting the displacement s of the rack 171 in the direction of the linear guide 172, the fixed swing angle of the gear 15 can be changed and controlled to θ, thereby realizing the swing motion of the main shaft. The specific formula is as follows:

[0072]

[0073]

[0074]

[0075] In the formula, D is the pitch circle diameter of the gear, m is the gear module, Z is the number of gear teeth, θ is the set swing angle, and θ 1 is the rotation angle of a single tooth, n is the number of teeth when swinging a certain angle, and s is the motion displacement of the matching rack.

[0076] As shown in Fig. 4 (a), the spindle support device 2 is composed of a spindle 21, a test bearing 22, a support bearing seat 23, a spindle end cover 24, an adjustment chuck 25, and an axial loading pressure rod 26. The right end of the spindle 21 is connected to the torque sensor 51 in the sensor test device 5 through a coupling, and rotates or swings under the drive of the torque. At the same time, due to the interference fit between the inner ring of the test bearing 22 and the spindle 21, the inner ring of the test bearing 22 is fixed with the spindle 21 under the action of the clamping force of the spindle end cover 24, so it moves with the spindle; on the other hand, the outer ring of the test bearing 22 is interference fit with the support bearing seat 23, and the adjustment chuck 25 receives the load and torque from the axial loading pressure rod 26, which is transmitted to the support bearing seat 23 through the tooth structure, and further transmitted to the test bearing 22, so that the axial load is applied to the test bearing 22 and the outer ring position is adjusted.

[0077] As shown in Figure 4 (b), the method for adjusting the position and angle of the inner and outer rings of the test bearing is obtained, thereby achieving the control of the load-bearing area and the degree of wear; Circumferential adjustment of the outer ring: The outer ring of the test bearing 22 is interference-connected with the support bearing seat 23, so as to ensure that the inner and outer rings of the test bearing 22 can be adjusted when the main shaft 21 and the support bearing seat 23 rotate. There are teeth on the support bearing seat 23 that match the adjustment chuck 25, so that when the adjustment chuck 25 rotates, the support bearing seat 23 is driven to rotate, and the adjustment chuck 25 is rotated by rotating the axial loading pressure rod 26, thereby indirectly adjusting the angle of the outer ring of the test bearing 22, which is recorded as θ o; Inner ring circumferential adjustment: The inner ring of the test bearing 22 is in interference connection with the main shaft 21 and is subjected to the pressing force of the main shaft end cover 24. When the test device is stopped, the angle of the inner ring of the test bearing 22 is adjusted by manually rotating the main shaft 21. The angle of the inner ring adjustment is θ i Therefore, by adjusting θ i With θ o The size of the bearing can be adjusted to achieve the purpose of angle adjustment, wear control, load-bearing area adjustment, etc. for non-circular motion of the test bearing.

[0078] like Figure 5As shown, the high temperature test device 3 is composed of an insulating water jacket 31, a high frequency heating device 32, a first bearing cover 33, a test module 34, a test bearing seat 341, a test bearing 342, a bearing module 35, a spacer 36, a support box 37, a second bearing cover 38, an O-ring 381, and an adjustment pad 39. The insulating water jacket 31 isolates the heat transfer from the high frequency heating device 32 to other test components by supplying circulating water; the high frequency heating device 32 heats the main shaft 21, and heats the inner and outer rings of the test module 34, the bearing module 35, and the test bearing 22 by heat conduction; the support box 37, the first bearing cover 33, and the second bearing cover 38 together form a test box, which plays the role of carrying the experimental components and keeping the test bearing warm. The O-ring is placed between the second bearing cover 38 and the adjusting chuck 25 to reduce the resistance when adjusting the outer ring of the test bearing; the adjusting pad 39 is arranged in the test box to support the test module 34, the bearing module 35, and the support bearing seat 23 of the test bearing 22.

[0079] like Figure 6 As shown, the loading device 4 is composed of an axial hydraulic cylinder 41, an axial hydraulic cylinder base 42, a radial pressure rod 43, a radial hydraulic cylinder 44, and a radial hydraulic cylinder base 45. The axial hydraulic 41 and the base 42 together constitute the axial loading device, which applies an axial load to the axial pressure rod 26 through the hydraulic cylinder, and transmits the axial load through the axial loading pressure rod 26 to the adjustment chuck 25 and then to the supporting bearing seat 23; the radial pressure rod 43, the radial hydraulic cylinder 44 and the radial support 45 together constitute the radial loading device, which transmits the radial load to the radial pressure rod 43 and the bearing bearing seat 35 through the radial hydraulic cylinder 44, and the bearing bearing seat 352 indirectly provides a radial load to the test bearing 22 through the bearing bearing 351 on the main shaft.

[0080] As shown in Fig. 7 (a) and (b), the sensing and measuring device 5 is composed of a torque sensor 51, an axial pressure sensor 52, an outer ring temperature sensor 53, a radial pressure sensor 54, and an inner ring temperature sensor 55. The torque sensor 51 mainly measures and records the torque and deflection angle generated by the swing drive device 1; the axial pressure sensor 52 and the radial pressure sensor 54 respectively measure the axial load and radial load borne by the test bearing 22; the outer ring temperature sensor 53 has two temperature probes, which respectively measure the outer ring temperature of the companion test bearing 342 and the test bearing 22; since the inner ring is a rotating component and is difficult to measure, an infrared sensor is used to measure the inner ring temperature. The inner ring temperature sensor 55 is an infrared temperature sensor, which measures the inner ring temperature of the test bearing 22 and the companion test bearing 342 by infrared temperature.

[0081] like Figure 8As shown, the fixed base 6 is composed of a base 61, a bracket 62, and a horizontal adjustment bolt 63. The base 61 and the bracket 62 together form the basic platform of the test device; the horizontal adjustment bolt 63 can adjust the levelness of the entire experimental device.

[0082] Based on the above structure, a high-temperature rolling bearing non-circular oscillation experimental device is built, and the performance of the bearing is tested through the experimental device. The specific performance test plan is as follows:

[0083] (1) Rolling bearing performance test at room temperature.

[0084] The measured parameters are the main shaft rotation angle θ and torque M, radial and axial loads F x , F y , the temperature change during the experiment. At the same time, the wear degree of the inner and outer ring raceways of the test bearing is observed by a camera.

[0085] Test method: Install the test bearing correctly, record the initial position difference of the inner and outer rings in the axial direction, and set the spindle rotation angle θ and the radial and axial loads F. x , F y Two variables are used to simulate environmental conditions and record the temperature rise T of the test bearing. After a period of testing, turn off the spindle drive device, rotate and adjust the axial pressure rod and the specific angle of the spindle to make the position difference between the inner and outer rings. The change in the circumferential relative position of the inner and outer rings will affect the change in the radial and axial load force position between the steel ball rolling element, the cage and the inner and outer rings. Repeat the experimental steps. After multiple experimental schemes, remove the test bearing and observe the difference in internal wear of the bearing.

[0086] The specific angle with the main axis refers to the angle variable that you want to control during the experiment. The change in circumferential position affects the change in radial and axial load positions between the steel ball rolling element, the cage and the inner and outer rings. The difference in the position of the inner and outer rings refers to the change in the relative angle of the inner and outer rings in the axial direction and the initial angle.

[0087] (2) Rolling bearing performance test at high temperature

[0088] The measured parameters are the main shaft rotation angle θ and torque M, radial and axial loads F x , F y 、Inner and outer ring temperature Τ 1 With T 2 At the same time, the camera is used to observe the wear degree of the inner and outer ring raceways of the test bearing.

[0089] Test method: Install the test bearing correctly, record the initial position difference of the inner and outer rings in the axial direction, set the ambient temperature, and heat it with a high-frequency heating device. 1 With T 2When the set test temperature is reached, stop heating and keep warm. x , F y Two variables are used to simulate environmental conditions. The temperature changes of the inner and outer rings of the test bearings are recorded during the test. After a period of testing, the spindle rotation device is turned off, and the axial pressure rod and the spindle are rotated to adjust the specific angle to make the inner and outer ring positions different, and the experimental steps are repeated. After multiple experimental schemes, the test bearings are removed and the internal wear differences of the bearings are observed.

[0090] The specific angle with the main axis refers to the angle variable that you want to control during the experiment. The change in circumferential position affects the change in radial and axial load positions between the steel ball rolling element, the cage and the inner and outer rings. The difference in the position of the inner and outer rings refers to the change in the relative angle of the inner and outer rings in the axial direction and the initial angle.

[0091] (3) Adjustment experiment of non-uniform wear of inner and outer sleeves caused by non-circular motion

[0092] Test method: Install the test bearing correctly, set the spindle rotation angle θ, radial and axial load F for different test time periods x , F y and other environmental variables, and then adjust the positions of the inner and outer rings of the tested bearings at different time periods according to the test plan, so as to achieve the purpose of the non-uniform wear test. The specific outer ring adjustment method is to rotate the axial loading pressure rod, thereby indirectly adjusting the outer ring of the tested bearing in the circumferential direction, and the inner ring adjustment method is to rotate the main shaft in the shutdown state, thereby adjusting the inner ring of the tested bearing in the circumferential direction. The inner and outer rings of the adjusted bearings are tested to achieve the purpose of the non-uniform wear test at different circumferential positions of the inner and outer rings.

[0093] In the case of non-circular motion, the degree of wear at different circumferential positions is different. By adjusting the different circumferential positions, the degree of wear at different circumferential positions can be controlled.

[0094] It should be noted that the parts not described in detail in the present invention are prior art.

[0095] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0096] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0097] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0098] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0099] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0100] The above examples are only the best embodiments of the present invention. Obviously, the present invention is not limited to the above examples, and there are many variations. All variations that can be directly derived or associated with the contents disclosed by a person skilled in the art should be considered as the protection scope of the present invention.

Claims

1. A high temperature rolling bearing non-circular oscillation test device, characterized in that: It includes a swing drive device, a main shaft support device, a high temperature test device and a loading device; the swing drive force generated by the rack and the swing gear in the swing drive device is transmitted to the main shaft of the main shaft support device by a coupling, driving the main shaft to reciprocate, and the test bearing is assembled on the main shaft and rotates synchronously with the main shaft. The high temperature test device is assembled on the main shaft, and the environmental temperature of the test bearing is controlled by heating the main shaft. The loading device includes an axial loading device and a radial loading device. The axial loading device provides an axial load for the test bearing, and the radial loading device provides a radial load for the test bearing.

2. A high temperature rolling bearing non-circular oscillation test device according to claim 1, characterized in that: It also includes a sensor test device for measuring the axial load, radial load, inner ring temperature and outer ring temperature of the test bearing, and the torque and deflection angle of the test bearing. The data during the test is tested and recorded through the sensor test device.

3. A high temperature rolling bearing non-circular oscillation test device according to claim 2, characterized in that: The swing driving device, the spindle supporting device, the high temperature testing device, the loading device and the sensing testing device are arranged on a fixed base, and the fixed base includes a base, a bracket and a horizontal adjustment bolt. The bracket is supported under the base, and the upper surface of the base is a horizontal plane. The swing driving device, the spindle supporting device, the high temperature testing device, the loading device and the sensing testing device are arranged on the base, and the bracket is provided with horizontal adjustment bolts at the four corners to adjust the horizontality of the testing device.

4. A high temperature rolling bearing non-circular oscillation test device according to claim 1, characterized in that: The swing drive device also includes a linear guide rail, a guide rail support, a gear shaft, a first bearing seat and a second bearing seat; the linear guide rail is fixed on the guide rail support, the rack is connected to the linear guide rail and displaced along the linear guide rail, the rack is meshed with the swing gear, the gear shaft is fixedly assembled in the swing gear, and the gear shaft is supported by the first bearing seat and the second bearing seat; the linear displacement of the rack drives the swing gear and the gear shaft to rotate reciprocatingly, and the gear shaft transmits the torque to the main shaft.

5. A high temperature rolling bearing non-circular oscillation test device according to claim 4, characterized in that: The swing drive device also includes a protective shell, which covers the swing gear, the first bearing seat and the second bearing seat; the gear shaft is fixedly connected to the swing gear through a locking nut; the gear shaft is connected to the torque sensor of the sensor test device through a coupling, and the torque sensor is connected to the main shaft through the coupling. The torque and deflection angle generated by the swing drive device are measured and recorded through the torque sensor.

6. A high temperature rolling bearing non-circular oscillation test device according to claim 1, characterized in that: The spindle support device comprises a supporting bearing seat, a spindle end cover, an adjusting chuck, an axial loading pressure rod and the spindle; a spindle end cover is fixed to the end of the spindle away from the swing driving device; a supporting bearing seat is assembled on the outside of the test bearing, the inner ring of the test bearing is interference fit with the spindle and rotates synchronously, the outer ring of the test bearing is interference fit with the supporting bearing seat, the supporting bearing seat is connected with the adjusting chuck through a tooth structure, the axial loading pressure rod is connected to the center of the side of the adjusting chuck away from the supporting bearing seat, the adjusting chuck rotates along the axis of the spindle with the axial loading pressure rod, the axial loading device is connected to the axial loading pressure rod to provide axial load to the adjusting chuck, the adjusting chuck receives the load and torque from the axial loading pressure rod, transmits them to the supporting bearing seat through the tooth structure, and further transmits them to the test bearing, so as to apply axial load to the test bearing and adjust the position of the outer ring.

7. A high temperature rolling bearing non-circular oscillation test device according to claim 6, characterized in that: The axial loading device includes an axial hydraulic cylinder and an axial hydraulic cylinder base. The axial hydraulic cylinder base is fixedly arranged, and the axial hydraulic cylinder is assembled on the axial hydraulic cylinder base. The piston rod of the axial hydraulic cylinder is connected to the axial loading pressure rod through a hinge bearing connector. The piston rod of the axial hydraulic cylinder, the axial loading pressure rod and the axis of the main shaft coincide. An axial pressure sensor is arranged between the piston rod of the axial hydraulic cylinder and the axial loading pressure rod. The axial pressure sensor is a device used for measuring the axial load of the test bearing in the sensing test device.

8. The high temperature rolling bearing non-circular oscillation test device according to claim 1, characterized in that: The high-temperature test device includes a high-frequency heating device, a load-bearing module, a test module and a test box. The high-frequency heating device is arranged on the main shaft and heats the main shaft. The load-bearing module includes a load-bearing bearing and a load-bearing bearing seat. The load-bearing bearing is assembled on the main shaft, and a load-bearing bearing seat is installed outside the load-bearing bearing; the test module includes a test bearing and a test bearing seat. The test bearing is assembled on the main shaft, and a test bearing seat is installed outside the test bearing. The load-bearing module, the test module, the test bearing and the supporting bearing seat arranged outside the test bearing are enclosed in the test box. The high-frequency heating device is arranged outside the test box. The high-frequency heating device heats the main shaft and heats the inner and outer rings of the test module, the load-bearing module and the test bearing through heat conduction.

9. A high temperature rolling bearing non-circular oscillation test device according to claim 8, characterized in that: The test box body is composed of a cylindrical supporting box body and bearing covers on both sides. An adjusting pad is arranged in the test box body, and the adjusting pad is located below the load-bearing seat, the test bearing seat, and the supporting bearing seat for support. The inner ring of the tested bearing and the inner ring of the load-bearing bearing are limited by a spacer sleeve; an insulating water jacket is arranged at one end of the main shaft connected to the swing driving device; an outer ring temperature sensor is arranged in the test box body, and the outer ring temperature sensor has two temperature probes, which respectively measure the outer ring temperatures of the test bearing and the tested bearing; an inner ring temperature sensor is arranged outside the test box body, and the inner ring temperature sensor is an infrared temperature sensor, and the inner ring temperatures of the tested bearing and the test bearing are measured by the inner ring temperature sensor; the outer ring temperature sensor and the inner ring temperature sensor are devices used in the sensing test device to measure the inner and outer ring temperatures of the tested bearing and the test bearing.

10. A high temperature rolling bearing non-circular oscillation test device according to claim 8, characterized in that: The radial loading device includes a radial pressure rod, a radial hydraulic cylinder and a radial hydraulic cylinder base. The radial hydraulic cylinder base is fixedly arranged, and the radial hydraulic cylinder is assembled on the radial hydraulic cylinder base. The piston rod of the radial hydraulic cylinder is connected to the radial pressure rod, and the radial pressure rod passes through the test box and is radially supported on the load-bearing seat; a radial pressure sensor is arranged between the piston rod of the radial hydraulic cylinder and the radial pressure rod, and the radial pressure sensor is a device used in the sensing test device to measure the radial load of the test bearing.

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