Double-row roller bearing tester

Abstract

A double-row roller bearing tester relates to the technical field of bearing test. The objective of the invention is to solve the problem that the existing bearing tester with an inner ring rotation mode and a unidirectional axial loading force cannot meet the test requirements of a double-row roller bearing. The device comprises an upper shell, a lower shell, a fixed shaft, a test shaft, a test bearing, an end cover and an axial loading mechanism, the upper shell and the lower shell are connected to form a test cavity, the end cover is installed in a test bushing, the fixed shaft is fixedly installed on the end cover, the test shaft is rotatably installed in the test cavity through a first process bearing and a second process bearing which are distributed at an interval, and the axial loading mechanism is arranged in the test cavity. When a test is carried out, the outer ring of the test bearing rotates, the inner ring of the test bearing is fixed, the radial loading mechanism applies a radial force through the load body, the process bearing and the test axial test bearing, and the axial loading mechanism applies a bidirectional axial force through the load body, the process bearing and the test axial test bearing, so that the test requirements of the double-row roller bearing are met.

Description

Technical Field

[0001] The present invention relates to the technical field of bearing testing, in particular to a double-row roller bearing tester. Background Art

[0002] Bearing testing refers to operating the bearing under certain operating conditions to verify whether the bearing achieves the expected performance and service life.

[0003] Conventional bearing testers rotate the inner ring, and the axial loading force is usually unidirectional, without the function of reversing the axial load. The test objects are usually cylindrical roller bearings, deep groove ball bearings and double-half inner ring angular contact bearings. Since double-row roller bearings can withstand radial forces as well as bidirectional axial forces, conventional bearing testers cannot meet the testing requirements of double-row roller bearings.

[0004] In summary, the existing bearing tester, which uses inner ring rotation and unidirectional axial loading, cannot meet the test requirements of double-row roller bearings. Summary of the Invention

[0005] The present invention aims to solve the problem that bearing testers with inner ring rotation and unidirectional axial loading cannot meet the testing requirements of double-row roller bearings. Furthermore, a double-row roller bearing tester is provided.

[0006] The technical solution of the present invention is: a double-row roller bearing tester, comprising: an upper shell, a lower shell, a fixed shaft, a test shaft, a test bearing, an end cover, and an axial loading mechanism, wherein the upper shell and the lower shell are connected to form a test cavity, the end cover is mounted on a test bushing, the fixed shaft is fixedly mounted on the end cover, the test shaft is rotatably mounted in the test cavity via a first process bearing and a second process bearing that are spaced apart, one end of the test shaft is connected to a coupling extending to the outside of the test cavity, the first process bearing has a load body, the load body is connected to the driving end of the radial loading mechanism, and a radial force is applied to the test bearing via the radial loading mechanism;

[0007] The test bearing is arranged in the test cavity, the inner ring of the test bearing is fixedly connected to the fixed shaft, the outer ring of the test bearing is fixedly connected to the test shaft, the driving end of the axial loading mechanism is connected to the load body, and a bidirectional axial force is applied to the test bearing through the axial loading mechanism.

[0008] Furthermore, the first process bearing is a double-half inner ring angular contact bearing, and the second process bearing is a cylindrical roller bearing, and the cylindrical roller bearing is installed in the test cavity through a process bushing.

[0009] Furthermore, the radial loading mechanism is a first hydraulic cylinder, the first hydraulic cylinder has a retractable radial loading head, and the retractable direction of the radial loading head is perpendicular to the test axis.

[0010] Furthermore, the first hydraulic cylinder is threadedly connected to the upper housing or the lower housing.

[0011] Furthermore, the axial loading mechanism includes a second hydraulic cylinder and a third hydraulic cylinder, the second hydraulic cylinder is located on one side of the load body, and the third hydraulic cylinder is located on the other side of the load body, the second hydraulic cylinder has a retractable axial loading head, and the retractable direction of the axial loading head is parallel to the test bearing.

[0012] Furthermore, a loading disc is slidably provided in the test cavity, the axial loading head of the second hydraulic cylinder abuts against the loading disc, the loading disc is connected to the load body through a first loading rod, and the third hydraulic cylinder is connected to the load body through a second loading rod.

[0013] Furthermore, the second hydraulic cylinder is threadedly connected to the outer shell formed by the upper shell and the lower shell, and the third hydraulic cylinder is threadedly connected to the outer shell formed by the upper shell and the lower shell.

[0014] Furthermore, the upper shell has a plurality of bearing temperature measuring holes staggeredly distributed on both sides.

[0015] Compared with the prior art, the present invention has the following effects:

[0016] 1. In the double-row roller bearing tester provided by the present invention, during the test, the outer ring of the test bearing rotates and the inner ring is fixed. The radial loading mechanism applies radial force through the load body, the process bearing and the test axial test bearing, and the axial loading mechanism applies bidirectional axial force through the load body, the process bearing and the test axial test bearing, thereby meeting the test requirements of the double-row roller bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 1 is a schematic diagram of the overall structure of the double-row roller bearing tester of the present invention;

[0018] Figure 2 yes Figure 1 Cross-sectional view at AA in the middle;

[0019] Figure 3 yes Figure 2 Enlarged view of area A in the middle;

[0020] Figure 4 yes Figure 2 Magnified view of area B.

[0021] In the figure: 1. Upper shell; 2. Lower shell; 3. Fixed shaft; 4. Test shaft; 5. Test bearing; 6. End cover; 7. Test cavity; 8. First process bearing; 9. Second process bearing; 10. Coupling; 11. Load body; 12. Test bushing; 13. Process bushing; 14. First hydraulic cylinder; 15. Radial loading head; 16. Second hydraulic cylinder; 17. Third hydraulic cylinder; 18. Axial loading head; 19. Loading plate; 20. First loading rod; 21. Second loading rod. DETAILED DESCRIPTION

[0022] Specific implementation method 1: Combination Figures 1 to 4 Describe this embodiment, this embodiment includes an upper shell 1, a lower shell 2, a fixed shaft 3, a test shaft 4, a test bearing 5, an end cover 6 and an axial loading mechanism. After the upper shell 1 and the lower shell 2 are connected, a test cavity 7 is formed. The end cover 6 is installed in the test bushing. The fixed shaft 3 is fixedly installed on the end cover 6. The test shaft 4 is rotatably installed in the test cavity 7 through the first process bearing 8 and the second process bearing 9 distributed at intervals. One end of the test shaft 4 is connected to a coupling 10 extending to the outside of the test cavity 7. The first process bearing 8 has a load body 11, which is connected to the driving end of the radial loading mechanism. A radial force is applied to the test bearing 5 through the radial loading mechanism. The test bearing 5 is arranged in the test cavity 7. The inner ring of the test bearing 5 is fixedly connected to the fixed shaft 3, and the outer ring of the test bearing 5 is fixedly connected to the test shaft 4. The driving end of the axial loading mechanism is connected to the load body 11, and a bidirectional axial force is applied to the test bearing 5 through the axial loading mechanism.

[0023] It should be noted that the forces applied by the radial loading mechanism and the axial loading mechanism first act on the load body 11, and then are transmitted to the test bearing 5 through the process bearing and the test shaft 4, thereby testing the test bearing 5. The outer ring of the test bearing 5 rotates with the test shaft 4, and the inner ring is fixed on the fixed shaft 3 and does not rotate. The upper shell 1 and the lower shell 2 can be connected by bolts to facilitate disassembly and replacement of the test. The upper shell 1 and the lower shell 2 are connected to form an outer shell.

[0024] In the double-row roller bearing tester of this embodiment, when conducting a test, the outer ring of the test bearing 5 rotates and the inner ring is fixed. The radial loading mechanism applies a radial force to the test bearing 5 through the load body 11, the process bearing and the test shaft 4, and the axial loading mechanism applies a bidirectional axial force to the test bearing 5 through the load body 11, the process bearing and the test shaft 4, thereby meeting the test requirements of the double-row roller bearing.

[0025] Specific implementation method 2: Combination Figure 2 、 Figure 4This embodiment differs from the first embodiment in that the first process bearing 8 is a double-half inner ring angular contact bearing, and the second process bearing 9 is a cylindrical roller bearing. The cylindrical roller bearing is mounted within the test cavity 7 via a process bushing 13. Considering the potential for bidirectional axial forces on the test bearing 5, the first process bearing 8 utilizes a double-half inner ring angular contact bearing capable of withstanding both bidirectional axial and radial loads. To withstand axial displacement of the shafting caused by axial loading, the second process bearing 9 utilizes a cylindrical roller bearing fixed to the test cavity 7. Other components and connections are the same as those in the first embodiment.

[0026] Specific implementation method three: Combination Figure 2 This embodiment differs from the first embodiment in that the radial loading mechanism is a first hydraulic cylinder 14 , which has a retractable radial loading head 15 . The retractable direction of radial loading head 15 is perpendicular to the test axis 4 . The radial loading head 15 of the first hydraulic cylinder 14 applies a radial force to the test bearing 5 . The higher the pressure applied by the first hydraulic cylinder 14 , the better the test effect. The remaining components and connections are the same as those of the first embodiment.

[0027] Specific implementation method four: Combination Figure 2 This embodiment differs from the third embodiment in that the first hydraulic cylinder 14 is threadedly connected to the upper housing 1 or the lower housing 2. In this embodiment, the upper housing 1 has interface threads that mate with the first hydraulic cylinder 14. This threaded connection facilitates maintenance and replacement of the first hydraulic cylinder 14, making it more convenient to use. The remaining components and connections are the same as those in the third embodiment.

[0028] Specific implementation method five: Combination Figure 2 This embodiment differs from the first embodiment in that the axial loading mechanism includes a second hydraulic cylinder 16 and a third hydraulic cylinder 17. The second hydraulic cylinder 16 is located on one side of the load body 11, and the third hydraulic cylinder 17 is located on the other side of the load body 11. The second hydraulic cylinder 16 has a retractable axial loading head 18, the extension direction of which is parallel to the test bearing 5. By controlling the pressure of the second and third hydraulic cylinders 16, 17, the direction and magnitude of the axial load on the test bearing 5 can be changed. The higher the pressure of the second and third hydraulic cylinders 16, 17, the better the test results and the higher the applicable standards. The other components and connections are the same as those of the first embodiment.

[0029] Specific implementation method six: combination Figure 2This embodiment is described. This embodiment differs from the fifth embodiment in that a loading disc 19 is slidably disposed within the test chamber 7. The sliding direction of the loading disc 19 is axial. The axial loading head 18 of the second hydraulic cylinder 16 abuts against the loading disc 19. The loading disc 19 is connected to the load body 11 via a first loading rod 20. The first loading rod 20 is mounted on the loading disc 19. The third hydraulic cylinder 17 is connected to the load body 11 via a second loading rod 21. The first loading rod 20 and the second loading rod 21 have multiple evenly distributed circumferentially, which serve to transmit axial force. This increases the contact area, allowing the axial force to act evenly on the load body 11, resulting in better test results. Other components and connection relationships are the same as those of the fifth embodiment.

[0030] Specific implementation method seven: combination Figure 2 This embodiment differs from the fifth embodiment in that the second hydraulic cylinder 16 is threadedly connected to the housing formed by the upper and lower housings 1 and 2, and the third hydraulic cylinder 17 is threadedly connected to the housing formed by the upper and lower housings 1 and 2. This threaded connection facilitates maintenance and replacement of the second and third hydraulic cylinders 16 and 17, making them more convenient to use. The remaining components and connections are the same as those in the fifth embodiment.

[0031] Specific implementation method eight: combination Figure 1 This embodiment differs from Specific Embodiment 1 in that the upper housing 1 has multiple bearing temperature measurement holes staggered on both sides. These holes facilitate the installation of sensors to measure the bearing outer ring temperature. Given the size and spacing of the bearing inner ring, a short-rod temperature sensor can be used to measure the inner ring end face, the inner diameter circumference, or by directly welding the sensor probe to the bearing inner ring. The remaining components and connections are the same as in Specific Embodiments 1 to 7.

[0032] Working principle of this embodiment:

[0033] During operation, the test shaft 4 drives the outer ring of the test bearing 5 to rotate, and the first hydraulic cylinder 14 drives the radial loading head 15 to move downward to apply radial force to the load body 11, and transmits the radial force to the test bearing 5 through the double half inner ring angular contact bearing and the test shaft 4. The axial loading head 18 of the second hydraulic cylinder 16 acts on one side of the load body 11 through the first loading rod 20, and the third hydraulic cylinder 17 acts on the other side of the load body 11 through the second loading rod 21. By changing the axial loads of the second hydraulic cylinder 16 and the third hydraulic cylinder 17, the direction and force of the axial load of the test bearing 5 are controlled to realize the test of the test bearing 5.

[0034] The content of the present invention is not limited to the content of the above-mentioned embodiments. The combination of one or more specific embodiments can also achieve the purpose of the invention.

Claims

1. A double-row roller bearing tester comprising: An upper shell (1), a lower shell (2), a fixed shaft (3), a test shaft (4), a test bearing (5), an end cover (6) and an axial loading mechanism, wherein the upper shell (1) and the lower shell (2) are connected to form a test cavity (7), the end cover (6) is installed in a test bushing (12), the fixed shaft (3) is fixedly installed on the end cover (6), the test shaft (4) is rotatably installed in the test cavity (7) through a first process bearing (8) and a second process bearing (9) distributed at intervals, one end of the test shaft (4) is connected to a coupling (10) extending to the outside of the test cavity (7), the first process bearing (8) has a load body (11), the load body (11) is connected to the driving end of the radial loading mechanism, and a radial force is applied to the test bearing (5) through the radial loading mechanism; It is characterized in that the test bearing (5) is arranged in the test cavity (7), the inner ring of the test bearing (5) is fixedly connected to the fixed shaft (3), the outer ring of the test bearing (5) is fixedly connected to the test shaft (4), the driving end of the axial loading mechanism is connected to the load body (11), and a bidirectional axial force is applied to the test bearing (5) through the axial loading mechanism.

2. A double row roller bearing tester according to claim 1, characterized in that: The first process bearing (8) is a double-half inner ring angular contact bearing, and the second process bearing (9) is a cylindrical roller bearing. The cylindrical roller bearing is installed in the test cavity (7) through a process bushing (13).

3. The double-row roller bearing tester according to claim 1, characterized in that: The radial loading mechanism is a first hydraulic cylinder (14), and the first hydraulic cylinder (14) has a retractable radial loading head (15). The retractable direction of the radial loading head (15) is perpendicular to the test axis (4).

4. A double row roller bearing tester according to claim 3, characterized in that: The first hydraulic cylinder (14) is threadedly connected to the upper housing (1) or the lower housing (2).

5. The double-row roller bearing tester according to claim 1, characterized in that: The axial loading mechanism comprises a second hydraulic cylinder (16) and a third hydraulic cylinder (17), wherein the second hydraulic cylinder (16) is located on one side of the load body (11), and the third hydraulic cylinder (17) is located on the other side of the load body (11), and the second hydraulic cylinder (16) has a retractable axial loading head (18), and the retractable direction of the axial loading head (18) is parallel to the test bearing (5).

6. A double row roller bearing tester according to claim 5, characterized in that: A loading disc (19) is slidably provided in the test chamber (7), an axial loading head (18) of the second hydraulic cylinder (16) abuts against the loading disc (19), the loading disc (19) is connected to the load body (11) via a first loading rod (20), and the third hydraulic cylinder (17) is connected to the load body (11) via a second loading rod (21).

7. The double-row roller bearing tester according to claim 5, characterized in that: The second hydraulic cylinder (16) is threadedly connected to the outer shell formed by the upper shell (1) and the lower shell (2), and the third hydraulic cylinder (17) is threadedly connected to the outer shell formed by the upper shell (1) and the lower shell (2).

8. A double row roller bearing tester according to any one of claims 1 to 7, characterized in that: The upper housing (1) has a plurality of bearing temperature measuring holes staggeredly distributed on both sides.

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