A high-speed temperature rise performance test platform for precision rolling bearings

Abstract

The application discloses a kind of precise rolling bearing high-speed temperature rise performance test test platform, including platform base, test shaft, driving device, loading device and temperature measuring device, the loading device includes electromagnetic loading cylinder, pressure sensor and loading shell, the loading shell coaxial sleeve is set on test shaft, the inner side wall of this loading shell and the outer ring of the bearing to be measured are mutually fitted, the electromagnetic loading cylinder is fixedly installed on platform base position close to test base, the push rod of this electromagnetic loading cylinder is set towards test base, the pressure sensor is installed on the push rod of electromagnetic loading cylinder, and the end of push rod is abutted to loading shell, temperature measuring hole is formed in the loading shell.The precise rolling bearing high-speed temperature rise performance test test platform of the application adopts electromagnetic loading cylinder to realize load loading, realizes and cooperates with pressure sensor to form closed loop control system, realizes the regulation and control of loading force is convenient.

Description

Technical Field

[0001] This invention relates to a testing platform, and more specifically to a testing platform for high-speed temperature rise performance of precision rolling bearings. Background Technology

[0002] During the bearing manufacturing process, high loads are applied to the bearings, and their ability to achieve the customer's requirements for temperature rise, grease leakage performance, and service life is verified at high speeds. During the test, the bearing temperature, load, speed, vibration, and test duration are monitored.

[0003] For example, in the prior art, patent number 201310240268.8, entitled "A Temperature Rise Test Device and Method for a Sealed Double-Row Angular Contact Ball Bearing," uses a drive shaft, drive motor, and force and measuring device to perform a temperature rise test on the bearing. During the test, the axial movement is mainly generated by tightening the nut through the thread and stud, which deforms the S-shaped sensor of the force and measuring device. The radial force F generated by the deformation is the test load. However, the above loading method is very inconvenient for controlling the loading force, requiring manual tightening of the nut to change the axial movement distance and ultimately change the loading force. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a precision rolling bearing high-speed temperature rise performance testing platform with convenient load force adjustment.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-speed temperature rise performance testing platform for precision rolling bearings, comprising a platform base, a test shaft, a drive device, a loading device, and a temperature measuring device. The platform base is equipped with a test base, and the test shaft is rotatably inserted within the test base. The bearing to be tested is fitted onto the test shaft. The drive device is linked to the test shaft to drive its rotation. The temperature measuring device is positioned above the test base to measure the temperature of the bearing to be tested. The loading device comprises an electromagnetic loading cylinder, a pressure sensor, and a loading housing. The loading housing is coaxially fitted onto the test shaft, and its inner wall is in contact with the outer ring of the bearing to be tested. The electromagnetic loading cylinder is fixedly installed on the platform base near the test base, with its push rod facing the test base. The pressure sensor is mounted on the push rod of the electromagnetic loading cylinder, and the end of the push rod abuts against the loading housing. The loading housing has a temperature measuring hole, through which the temperature measuring device detects the temperature of the outer ring of the bearing to be tested.

[0006] As a further improvement of the present invention, a loading plate is fixedly connected to the side of the loading shell facing the electromagnetic loading cylinder, a loading block is fixed in the middle of the loading plate, and a loading head is coaxially fixed to the end of the electromagnetic loading cylinder push rod. The end of the loading head facing away from the push rod is hemispherical and abuts against the loading block.

[0007] As a further improvement of the present invention, a base ring is provided in the middle of the test shaft, which divides the test shaft into two stations. Each station is coaxially fitted with a clamping ring group, which clamps and fixes the bearing to be tested.

[0008] As a further improvement of the present invention, the clamping ring assembly includes an inner clamping ring and an outer clamping ring. An auxiliary bearing is provided inside the test base, and the test shaft passes through the auxiliary bearing. The inner clamping ring and the outer clamping ring cooperate to clamp and fix the inner ring of the bearing to be tested. The end of the inner clamping ring facing away from the bearing to be tested abuts against the base ring, and the end of the outer clamping ring facing away from the bearing to be tested abuts against the inner ring of the auxiliary bearing. The inner clamping ring is in the shape of a hollow frustum, with its large end face abutting against the base ring and its small end face abutting against the inner ring of the bearing to be tested. The diameter of the large end face is larger than the diameter of the base ring.

[0009] As a further improvement of the present invention, the driving device includes a drive motor and a transmission device. The transmission device is fixed on the platform base near the test base, and a transmission shaft is installed inside it. One end of the transmission shaft is connected to the test shaft through a diaphragm coupling, and the other end is connected to the shaft of the drive motor through a belt.

[0010] As a further improvement of the present invention, a blocking ring is coaxially sleeved at the end of the loading housing facing the transmission device, and the inner ring wall portion of the blocking ring facing away from the transmission device abuts against the outer ring of the bearing to be tested.

[0011] The beneficial effects of this invention are that, through the setup of a platform base, a drive device, a loading device, and a temperature measuring device, a bearing temperature rise performance test platform can be effectively constructed. The loading device, which is composed of an electromagnetic loading cylinder, a pressure sensor, and a loading shell, allows for more convenient control of the loading force compared to the axial movement generated by tightening a nut in the prior art. Furthermore, the loading process can be closed-loop controlled through feedback from the pressure sensor, thereby achieving higher loading accuracy. Attached Figure Description

[0012] Figure 1 This is a top view of the test platform for high-speed temperature rise performance of precision rolling bearings according to the present invention; Figure 2 for Figure 1 A cross-sectional view of the test base. Detailed Implementation

[0013] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0014] Reference Figures 1 to 2 As shown, this embodiment of a precision rolling bearing high-speed temperature rise performance test platform includes a platform base 3, a test shaft 1, a drive device 2, a loading device 4, and a temperature measuring device 5. A test base 6 is mounted on the platform base 3. The test shaft 1 is rotatably inserted into the test base 6, and the bearing to be tested is sleeved on the test shaft 1. The drive device 2 is linked to the test shaft 1 to drive its rotation. The temperature measuring device 5 is positioned above the test base 6 to measure the temperature of the bearing to be tested. The loading device 4 includes an electromagnetic loading cylinder 41, a pressure sensor 42, and a loading housing 43. The loading housing 43 is coaxially sleeved on the test shaft 1, and its inner wall is in contact with the outer ring of the bearing to be tested. The electromagnetic loading cylinder 41 is fixedly installed on the platform base 3 near the test base 6, with its push rod facing the test base 6. The pressure sensor 42 is mounted on the electromagnetic loading cylinder. The push rod of 41 has its end abutting against the loading housing 43. The loading housing 43 has a temperature measuring hole. The temperature measuring device 5 detects the temperature of the outer ring of the bearing under test through the temperature measuring hole. In the process of using the test platform of this embodiment, it is only necessary to put the inner ring of the bearing under test onto the test shaft 1, and then put the loading housing 43 onto the outer ring of the bearing under test. During the test, the test shaft 1 rotates at high speed, while the bearing under test and the loading housing 43 are stationary. Then, through the action of the electromagnetic loading cylinder 41, a loading force is applied to the loading housing 43, and the loading force is fed back in real time through the pressure sensor. The loading force will then be applied to the bearing under test through the loading housing 43. This avoids the influence of the bearing being subjected to a single point load during the test. Moreover, the load can be adjusted by changing the parameters of the electromagnetic loading cylinder 41 through the external electrical control cabinet. The overall adjustment process is more convenient and faster, and the adjustment accuracy is also higher.

[0015] As an improved specific implementation, a loading plate 44 is fixedly connected to the side of the loading housing 43 facing the electromagnetic loading cylinder 41. A loading block 46 is fixed in the middle of the loading plate 44. A loading head 45 is coaxially fixed to the end of the push rod of the electromagnetic loading cylinder 41. The end of the loading head 45 facing away from the push rod is hemispherical and abuts against the loading block 46. By setting the loading plate 44, the loading force can be further dispersed. By setting the loading block 46, the loading force output by the electromagnetic loading cylinder 41 can be effectively collected. Then, by the action of the loading block 46 and the loading plate 44, the loading force can be effectively collected and then dispersed. By setting the loading head 45, the loading force applied by the electromagnetic loading cylinder 41 can be effectively concentrated.

[0016] As an improved specific implementation, the test shaft 1 is provided with a base ring 11 in the middle, which divides the test shaft 1 into two stations. Each station is coaxially fitted with a clamping ring group 12, which clamps and fixes the bearing to be tested. With the above structure, two test stations can be effectively formed, which effectively increases the test efficiency.

[0017] As an improved specific implementation, the clamping ring assembly 12 includes an inner clamping ring 121 and an outer clamping ring 122. An auxiliary bearing is provided inside the test base 6, and the test shaft 1 passes through the auxiliary bearing. The inner clamping ring 121 and the outer clamping ring 122 cooperate to clamp and fix the inner ring of the bearing to be tested. The end of the inner clamping ring 121 facing away from the bearing to be tested abuts against the base ring 11, and the end of the outer clamping ring 122 facing away from the bearing to be tested abuts against the inner ring of the auxiliary bearing. The inner clamping ring 121 is in the shape of a hollow frustum, with its large end face abutting against the base ring 11 and its small end face abutting against the inner ring of the bearing to be tested. The diameter of the large end face is larger than the diameter of the base ring 11. The cooperation of the inner clamping ring 121 and the outer clamping ring 122 can effectively clamp and fix the inner ring of the bearing to be tested, avoiding the problem of the bearing to be tested sliding on the test shaft 1 during testing. Furthermore, no additional fixing parts are required, and the replacement of the test bearing is also very convenient.

[0018] As an improved specific implementation, the drive device 2 includes a drive motor 21 and a transmission device 22. The transmission device 22 is fixed on the platform base 3 near the test base 6, and a transmission shaft 23 is installed inside it. One end of the transmission shaft 23 is connected to the test shaft 1 through a diaphragm coupling, and the other end is connected to the rotating shaft of the drive motor 21 through a belt. With the above structure, the rotating shaft of the drive motor 21 and the transmission shaft 23 can be isolated from each other by the belt, thereby preventing the vibration of the rotating shaft of the drive motor 21 from being transmitted to the transmission shaft 23 and increasing the stability of the rotation of the test shaft 1 during the test.

[0019] As an improved specific implementation, a blocking ring 431 is coaxially sleeved on one end of the loading housing 43 facing the transmission device 22. The inner ring wall portion of the blocking ring 431 facing away from the transmission device 22 abuts against the outer ring of the bearing to be tested. By setting the blocking ring 431, the outer ring of the bearing to be tested can be effectively blocked, avoiding the outer ring from shifting during the test.

[0020] In summary, the test platform of this embodiment, through the configuration of the electromagnetic loading cylinder 41, the pressure sensor 42, and the loading housing 43, can effectively form a loading device 4 that is easy to adjust. Compared with the method of tightening nuts in the prior art, it can achieve closed-loop control, thereby achieving higher control accuracy.

[0021] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A high-speed temperature rise performance test platform for precision rolling bearings, comprising a platform base (3), a test shaft (1), a drive device (2), a loading device (4), and a temperature measuring device (5), wherein a test base (6) is provided on the platform base (3), the test shaft (1) is rotatably inserted into the test base (6), the bearing to be tested is sleeved on the test shaft (1), the drive device (2) is linked with the test shaft (1) to drive the test shaft (1) to rotate, and the temperature measuring device (5) is set above the test base (6) for measuring the temperature of the bearing to be tested, characterized in that: The loading device (4) includes an electromagnetic loading cylinder (41), a pressure sensor (42), and a loading housing (43). The loading housing (43) is coaxially mounted on the test shaft (1). The inner wall of the loading housing (43) is in contact with the outer ring of the bearing to be tested. The electromagnetic loading cylinder (41) is fixedly installed on the platform base (3) near the test base (6). The push rod of the electromagnetic loading cylinder (41) is set towards the test base (6). The pressure sensor (42) is installed on the push rod of the electromagnetic loading cylinder (41). The end of the push rod abuts against the loading housing (43). A temperature measuring hole is provided on the loading housing (43). The temperature measuring device (5) detects the temperature of the outer ring of the bearing to be tested through the temperature measuring hole. A loading plate (44) is fixedly connected to the side of the loading housing (43) facing the electromagnetic loading cylinder (41). A loading block (46) is fixed in the middle of the plate (44). A loading head (45) is coaxially fixed at the end of the push rod of the electromagnetic loading cylinder (41). The end of the loading head (45) facing away from the push rod is hemispherical and abuts against the loading block (46). The driving device (2) includes a drive motor (21) and a transmission device (22). The transmission device (22) is fixed on the platform base (3) near the test base (6). A transmission shaft (23) is installed inside it. One end of the transmission shaft (23) is connected to the test shaft (1) through a diaphragm coupling, and the other end is connected to the shaft of the drive motor (21) through a belt. A blocking ring (431) is coaxially sleeved on the end of the loading shell (43) facing the transmission device (22). The inner ring wall of the blocking ring (431) facing away from the transmission device (22) abuts against the outer ring of the bearing to be tested.

2. The test platform for high-speed temperature rise performance of precision rolling bearings according to claim 1, characterized in that: The test shaft (1) is provided with a base ring (11) in the middle. The base ring (11) divides the test shaft (1) into two stations. Each station is coaxially fitted with a clamping ring group (12), which clamps and fixes the bearing to be tested.

3. The test platform for high-speed temperature rise performance of precision rolling bearings according to claim 2, characterized in that: The clamping ring assembly (12) includes an inner clamping ring (121) and an outer clamping ring (122). An auxiliary bearing is provided inside the test base (6), and the test shaft (1) passes through the auxiliary bearing. The inner clamping ring (121) and the outer clamping ring (122) cooperate to clamp and fix the inner ring of the bearing to be tested. The end of the inner clamping ring (121) facing away from the bearing to be tested abuts against the base ring (11), and the end of the outer clamping ring (122) facing away from the bearing to be tested abuts against the inner ring of the auxiliary bearing. The inner clamping ring (121) is in the shape of a hollow frustum, with its large end face abutting against the base ring (11) and its small end face abutting against the inner ring of the bearing to be tested. The diameter of the large end face is larger than the diameter of the base ring (11).

Images