Bearing strengthening life test device

Abstract

The utility model provides a bearing strengthening life test device, which comprises a box body, a test shaft, a first working bearing and a second working bearing, a test shaft, a first working bearing, a test bearing and a second working bearing are arranged in the box body; the test shaft is sequentially sleeved with a first working bearing, a test bearing and a second working bearing; the side wall of the box body corresponding to the end surface of the test bearing is a first side wall, the first working bearing is close to the first side wall, and the side wall of the box body corresponding to the peripheral surface of the test bearing is a second side wall; an axial load applying hole is formed in the first side wall, and a radial load applying hole is formed in the second side wall; a test shaft driving device connecting hole is formed in the surface, opposite to the first side wall, of the box body; radial load and axial load can be applied to a set of experimental bearing, bearing lubrication is adjusted, and the requirement of a bearing strengthening test is met.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearings, in particular to a bearing strengthening life test device. Background Art

[0002] The test bearings are a wide series and require combined load application (radial load and axial load) and the load is large. If two sets of bearings are tested, twice the radial load needs to be applied, which exceeds the load range of the testing machine. Therefore, it is changed to test one set of bearings, and radial load and axial load are applied. The bearing lubrication is adjusted to meet the requirements of the bearing strengthening test, so this device is designed. Utility Model Content

[0003] In view of the above problems, the purpose of this application is to provide a bearing enhancement life test device, which can apply load to a set of bearing tests, adjust the bearing lubrication, and meet the requirements of the bearing enhancement test. Therefore, this device is designed.

[0004] To achieve some or all of the above-mentioned purposes or other purposes, the present application provides the following technical solutions: a bearing enhancement life test device, comprising a housing, a test shaft, a first working bearing, and a second working bearing; a test shaft, a first working bearing, a test bearing, and a second working bearing are arranged inside the housing; the first working bearing, the test bearing, and the second working bearing are sequentially sleeved on the test shaft; the side wall of the housing corresponding to the end face of the test bearing is the first side wall, the first working bearing is close to the first side wall, and a side wall of the housing corresponding to the circumferential surface of the test bearing is the second side wall; an axial load application hole is provided on the first side wall, and a radial load application hole is provided on the second side wall; a test shaft drive device connection hole is provided on the housing surface opposite to the first side wall.

[0005] Furthermore, the test shaft includes a first end, a center portion, and a second end; a shoulder is arranged at the connection between the first end and the center portion, and the diameter of the first end is smaller than the diameter of the center portion; an annular boss is arranged at the connection between the center portion and the second end; the first working bearing is arranged on the first end, the test bearing is arranged on the center portion, and the second working bearing is arranged on the second end.

[0006] Furthermore, it also includes a first disassembly ring, a first isolation ring, a positioning ring, a second disassembly ring, and a second isolation ring; the first disassembly ring and the first isolation ring are sleeved on the first end portion, one end of the first disassembly ring contacts the end face of the inner ring of the first working bearing, the other end of the first disassembly ring contacts one end of the first isolation ring, and the other end of the first isolation ring contacts the shaft shoulder and one end face of the inner ring of the test bearing; the positioning ring is sleeved on the center portion, the other end face of the inner ring of the test bearing contacts one end of the positioning ring, and the other end of the positioning ring contacts one end of the annular boss; the second disassembly ring and the second isolation ring are sleeved on the second end portion, the other end of the annular boss contacts one end of the second disassembly ring, the other end of the second disassembly ring contacts one end of the second isolation ring, and the other end of the second isolation ring contacts one end face of the inner ring of the second working bearing.

[0007] Furthermore, it also includes a first end sleeve, a loading sleeve, a spacer sleeve, a middle sleeve, and a second end sleeve; the first end sleeve is arranged on the first working bearing, and a first boss is arranged on a side of the first end sleeve close to the first side wall, an inner circumferential surface of the first end sleeve contacts the outer circumferential surface of the outer ring of the first working bearing, an inner end surface of the first boss contacts the outer ring end surface of the first working bearing, and an inner circumferential surface of the first end sleeve also contacts the loading sleeve; a second boss is arranged on a side of the loading sleeve away from the first side wall, an end surface of the loading sleeve close to the first side wall contacts the other end surface of the outer ring of the first working bearing, and an outer circumferential surface of the loading sleeve close to the first side wall contacts the inner circumferential surface of the first end sleeve; an end surface of the first end sleeve away from the first side wall contacts the inner end surface of the second boss, an end surface of the loading sleeve away from the first side wall contacts one end of the spacer sleeve, and the other end of the spacer sleeve contacts the outer ring end surface of the test bearing; the middle sleeve is arranged on the spacer sleeve and the test bearing; The second end sleeve is mounted on the second working bearing, and a third boss is arranged on the side of the second end sleeve away from the first side wall. The inner circumference of the second end sleeve contacts the outer circumference of the outer ring of the second working bearing, and the inner end surface of the third boss contacts the outer end surface of the second working bearing.

[0008] Furthermore, it also includes a left end sleeve, a middle end sleeve and a right end sleeve; the left end sleeve is a cylinder, the bottom of the cylinder is close to the first side wall, there is a gap between the bottom of the cylinder and the first side wall, and the left end sleeve is arranged on the first end sleeve; the middle end sleeve is arranged on the middle sleeve, and there is a gap between the middle end sleeve and the second side wall; the right end sleeve is a cylinder, the bottom of the cylinder is close to the box body, and the right end sleeve is arranged on the second end sleeve, and the test shaft driving device passes through the bottom of the cylinder and is fixedly connected to the test shaft.

[0009] Furthermore, a radial loading device is arranged in the radial load application hole, and the radial loading device includes a radial hydraulic cylinder, and the cylinder piston of the radial hydraulic cylinder is pressed against the middle end sleeve; an axial loading device is arranged in the axial load application hole, and the axial loading device includes an axial hydraulic cylinder, and the cylinder piston of the axial hydraulic cylinder is pressed against the bottom of the left end sleeve body.

[0010] Furthermore, lubricating oil holes corresponding to the positions are provided on the middle bushing and the middle end sleeve.

[0011] Furthermore, the first working bearing is a cylindrical roller bearing, and the inner ring of the first working bearing is mounted on a test shaft; the second working bearing is a tapered roller bearing, and the inner ring of the second working bearing is mounted on a test shaft; the test bearing is a tapered roller bearing, and the inner ring of the test bearing is mounted on a test shaft.

[0012] Furthermore, it also includes a transmission shaft and a driving device; the test shaft is connected to one end of the transmission shaft through a connecting hole of the test shaft driving device, and the other end of the transmission shaft is connected to the driving device.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: in the utility model, when conducting a test, the first working bearing, the test bearing and the second working shaft are sequentially sleeved on the test shaft; the radial load application hole is arranged at a position corresponding to the outer circumferential surface of the outer ring of the test bearing, and when a radial load is applied, the force applied by the radial load is all applied to the outer circumferential surface of the outer ring of the test bearing, and the force is transmitted to the test shaft through the test bearing, and the test shaft transmits the load to the working bearings at both ends, and the working bearings at both ends jointly bear the radial load through the reaction force; the axial load application hole is arranged at a position corresponding to the end surface of the outer ring of the test bearing, and when an axial load is applied, the force applied by the axial load is all applied to the end surface of the outer ring of the test bearing through the first end sleeve, the outer ring of the first working bearing, the loading sleeve, and the spacer, and the force is transmitted to the test shaft through the test bearing, and then transmitted to the second working bearing, and the second working bearing bears the radial load through the reaction force.

[0014] This application only needs to apply twice the radial load and axial load to the testing machine, which will not exceed the load range of the testing machine. Radial load and axial load can be applied to a set of test bearings, and the bearing lubrication and adjustment can meet the requirements of the bearing strengthening test.

[0015] By simulating the load loading unit, a radial load is applied to the radial direction of the test shaft, and an axial load is applied to the axial direction of the test shaft, thus forming a bending moment force with the test bearing as the fulcrum and the test shaft as the lever arm. The bending moment force formed by the applied radial force and axial force is then transmitted to the test bearing through the test shaft. This truly simulates the stress conditions of the test bearing when the test shaft is subjected to complex working conditions such as radial force, axial force and bending moment force, thereby improving the accuracy of the test bearing test and ensuring the test quality of the test bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a top view of the structure of the utility model;

[0017] Figure 2 It is the top view of the structure when the load is applied;

[0018] In the figure: 1. test shaft; 1-1. shoulder; 1-2. annular boss; 2. first working bearing; 3. second working bearing; 4. test bearing; 5. first disassembly ring; 6. first isolating ring; 7. positioning ring; 8. second disassembly ring; 9. second isolating ring; 10. first end sleeve; 11. loading sleeve; 12. spacer sleeve; 13. middle sleeve; 14. second end sleeve; 15. left end sleeve; 16. middle end sleeve; 17. right end sleeve; 18. housing; 18-1. axial load application hole; 18-2. radial load application hole; 19. driving device; 19-1. transmission shaft. DETAILED DESCRIPTION

[0019] In order to make the structure and function of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] See attached Figure 1 A bearing reinforcement life test device comprises a box body 18, a test shaft 1, a first working bearing 2, and a second working bearing 3; the test shaft 1, the first working bearing 2, the test bearing 4, and the second working bearing 3 are arranged inside the box body 18; the first working bearing 2, the test bearing 4, and the second working bearing 3 are sequentially sleeved on the test shaft 1; the side wall of the box body 18 corresponding to the end face of the test bearing 4 is the first side wall, the first working bearing 2 is close to the first side wall, and a side wall of the box body 18 corresponding to the circumferential surface of the test bearing 4 is the second side wall; an axial load application hole 18-1 is opened on the first side wall, and the axial load is applied to the left end sleeve through the axial load application hole 18-1, and a radial load application hole 18-2 is opened on the second side wall; a test shaft drive device connection hole is opened on the box body surface opposite to the first side wall.

[0021] Furthermore, the test shaft 1 includes a first end, a center portion, and a second end; a shoulder 1-1 is arranged at the connection between the first end and the center portion, and the diameter of the first end is smaller than the diameter of the center portion; an annular boss 1-2 is arranged at the connection between the center portion and the second end; the first working bearing 2 is sleeved on the first end, the test bearing 4 is sleeved on the center portion, and the second working bearing 3 is sleeved on the second end.

[0022] Furthermore, it also includes a first disassembly ring 5, a first isolation ring 6, a positioning ring 7, a second disassembly ring 8, and a second isolation ring 9; the first disassembly ring 5 and the first isolation ring 6 are sleeved on the first end portion, one end of the first disassembly ring 5 contacts the end face of the inner ring of the first working bearing 2, the other end of the first disassembly ring 5 contacts one end of the first isolation ring 6, and the other end of the first isolation ring 6 contacts the shoulder 1-1 and one end face of the inner ring of the test bearing 4; the positioning ring 7 is sleeved on the center portion, the other end face of the inner ring of the test bearing 4 contacts one end of the positioning ring 7, and the other end of the positioning ring 7 contacts one end of the annular boss 1-2; the second disassembly ring 8 and the second isolation ring 9 are sleeved on the second end portion, the other end of the annular boss 1-2 contacts one end of the second disassembly ring 8, the other end of the second disassembly ring 8 contacts one end of the second isolation ring 9, and the other end of the second isolation ring 9 contacts one end face of the inner ring of the second working bearing 3.

[0023] Furthermore, it also includes a first end sleeve 10, a loading sleeve 11, a spacer sleeve 12, a middle bushing 13, and a second end sleeve 14; the first end sleeve 10 is sleeved on the first working bearing 2, and a first boss is arranged on the side of the first end sleeve 10 close to the first side wall, the inner circumference of the first end sleeve 10 contacts the outer circumference of the outer ring of the first working bearing 2, the inner end face of the first boss contacts the outer end face of the first working bearing 2, and the inner circumference of the first end sleeve 10 also contacts the loading sleeve 11; the loading sleeve 11 is away from the first side wall. A second boss is provided on one side, and the end face of the loading sleeve 11 close to the first side wall contacts the other end face of the outer ring of the first working bearing 2, and the outer peripheral surface of the loading sleeve 11 close to the first side wall contacts the inner peripheral surface of the first end sleeve 10; the end face of the first end sleeve 10 away from the first side wall contacts the inner end face of the second boss, the end face of the loading sleeve 11 away from the first side wall contacts one end of the spacer sleeve 12, and the other end of the spacer sleeve 12 contacts the outer ring end face of the test bearing 4; the middle sleeve 13 is sleeved on the spacer sleeve 12 and the test bearing 4; the second end sleeve 14 is sleeved on the second working bearing 3, and a third boss is provided on the side of the second end sleeve 14 away from the first side wall, the inner peripheral surface of the second end sleeve 14 contacts the outer peripheral surface of the outer ring of the second working bearing 3, and the inner end face of the third boss contacts the outer ring end face of the second working bearing 3.

[0024] Furthermore, it also includes a left end sleeve 15, a middle end sleeve 16 and a right end sleeve 17; the left end sleeve 15 is a cylinder, the bottom of the cylinder is close to the first side wall, there is a gap between the bottom of the cylinder and the first side wall, and the left end sleeve 15 is sleeved on the first end sleeve 10; the middle end sleeve 16 is sleeved on the middle sleeve 13, and there is a gap between the middle end sleeve 16 and the second side wall; the right end sleeve 17 is a cylinder, the bottom of the cylinder is close to the box body 18, the right end sleeve 17 is sleeved on the second end sleeve 14, the test shaft driving device passes through the bottom of the cylinder and is fixedly connected to the test shaft 1; the right end sleeve 17 is fixedly connected to the box body 18; the test shaft driving device is fixedly connected to the test shaft 1 through the test shaft driving device connecting shaft 19-1.

[0025] Furthermore, a radial loading device is arranged in the radial load application hole 18-2, and the radial loading device includes a radial hydraulic cylinder, and the cylinder piston of the radial hydraulic cylinder is pressed against the middle end sleeve 16; an axial loading device is arranged in the axial load application hole 18-1, and the axial loading device includes an axial hydraulic cylinder, and the cylinder piston of the axial hydraulic cylinder is pressed against the bottom of the cylinder body of the left end sleeve 15; the radial loading device applies force to the middle end sleeve 16 through the radial hydraulic cylinder, and the axial loading device applies force to the bottom of the left end sleeve 15 through the axial hydraulic cylinder.

[0026] Furthermore, lubricating oil holes corresponding to the positions are provided on the middle bushing 13 and the middle end sleeve 16; the lubricating oil hole is L-shaped, and the outlet of the lubricating oil hole corresponds to the test bearing 4; the inlet of the lubricating oil hole corresponds to the outer peripheral surface of the outer ring of the test bearing 4, and the bearing is not overloaded. If the lubricating oil hole is designed vertically, the outer ring of the bearing blocks the oil hole, so it is designed to be L-shaped so that the oil can be sprayed into the bearing to lubricate the test bearing 4.

[0027] Furthermore, the first working bearing 2 is a cylindrical roller bearing, and the inner ring of the first working bearing 2 is mounted on the test shaft 1; the second working bearing 3 is a tapered roller bearing, and the inner ring of the second working bearing 3 is mounted on the test shaft 1; the test bearing 4 is a tapered roller bearing, and the inner ring of the test bearing 4 is mounted on the test shaft 1.

[0028] Furthermore, it also includes a transmission shaft and a driving device; the test shaft 1 is connected to one end of the transmission shaft 19-1 through the connecting hole of the test shaft driving device, and the other end of the transmission shaft 19-1 is connected to the driving device 19; a square hole matching the transmission shaft is provided at one end of the test shaft 1 connected to the transmission shaft, and the test shaft 1 and the transmission shaft 19-1 are key-connected for easy installation and disassembly.

[0029] Furthermore, an assembly method and steps of a bearing reinforcement life test device are as follows: a second disassembly ring, a second isolation ring, and a second working bearing are sequentially sleeved on the second end portion of the test shaft, and a second end sleeve and a right end sleeve are sequentially sleeved on the outer ring of the second working bearing; a positioning ring and a test bearing are sequentially sleeved on the central portion of the test shaft; a first isolation ring and a first disassembly ring are sequentially sleeved on the first end portion of the test shaft; a spacer sleeve and a loading sleeve are sequentially arranged on the outer ring end face of the test bearing; the first working bearing is continued to be sleeved on the first end portion of the test shaft so that the outer ring end face of the first working bearing contacts with the end face of the loading sleeve; a middle sleeve and a middle end sleeve are sequentially sleeved on the outer circumferential surface of the spacer sleeve and the outer circumferential surface of the outer ring of the test bearing, and a first end sleeve is sleeved on the outer ring of the first working bearing and the outer circumferential surface of the loading sleeve; a left end sleeve is arranged outside the first end sleeve; all the above components are assembled into a housing, and then connected to a driving device.

[0030] The above disclosure is only the preferred embodiment of the present application, which certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A bearing strengthening life test device, characterized in that: It includes a box body, a test shaft, a first working bearing, and a second working bearing; the test shaft, the first working bearing, the test bearing, and the second working bearing are arranged inside the box body; the first working bearing, the test bearing, and the second working bearing are sequentially sleeved on the test shaft; the side wall of the box body corresponding to the end face of the test bearing is the first side wall, the first working bearing is close to the first side wall, and the box body side wall corresponding to the circumferential surface of the test bearing is the second side wall; an axial load application hole is opened on the first side wall, and a radial load application hole is opened on the second side wall; a test shaft drive device connection hole is opened on the box body surface opposite to the first side wall.

2. A bearing enhancement life test device according to claim 1, characterized in that: The test shaft includes a first end, a center portion, and a second end. A shoulder is arranged at the connection between the first end and the center portion, and the diameter of the first end portion is smaller than the diameter of the center portion. An annular boss is arranged at the connection between the center portion and the second end portion. The first working bearing is sleeved on the first end portion, the test bearing is sleeved on the center portion, and the second working bearing is sleeved on the second end portion.

3. A bearing enhancement life test device according to claim 1, characterized in that: It also includes a first disassembly ring, a first isolation ring, a positioning ring, a second disassembly ring, and a second isolation ring; the first disassembly ring and the first isolation ring are sleeved on the first end portion, one end of the first disassembly ring contacts the end face of the inner ring of the first working bearing, the other end of the first disassembly ring contacts one end of the first isolation ring, and the other end of the first isolation ring contacts the shaft shoulder and one end face of the inner ring of the test bearing; the positioning ring is sleeved on the center portion, the other end face of the inner ring of the test bearing contacts one end of the positioning ring, and the other end of the positioning ring contacts one end of the annular boss; the second disassembly ring and the second isolation ring are sleeved on the second end portion, the other end of the annular boss contacts one end of the second disassembly ring, the other end of the second disassembly ring contacts one end of the second isolation ring, and the other end of the second isolation ring contacts one end face of the inner ring of the second working bearing.

4. A bearing enhancement life test device according to claim 1, characterized in that: It also includes a first end sleeve, a loading sleeve, a spacer sleeve, a middle sleeve, and a second end sleeve; the first end sleeve is arranged on the first working bearing, a first boss is arranged on the side of the first end sleeve close to the first side wall, the inner circumference of the first end sleeve contacts the outer circumference of the outer ring of the first working bearing, the inner end face of the first boss contacts the end face of the outer ring of the first working bearing, and the inner circumference of the first end sleeve also contacts the loading sleeve; a second boss is arranged on the side of the loading sleeve away from the first side wall, the end face of the loading sleeve close to the first side wall contacts the other end face of the outer ring of the first working bearing, and the loading sleeve close to the first side wall contacts the inner circumference of the first end sleeve. The outer circumferential surface of the first side wall contacts the inner circumferential surface of the first end sleeve; the end surface of the first end sleeve away from the first side wall contacts the inner end surface of the second boss, the end surface of the loading sleeve away from the first side wall contacts one end of the spacer sleeve, and the other end of the spacer sleeve contacts the outer ring end surface of the test bearing; the middle sleeve is sleeved on the spacer sleeve and the test bearing; the second end sleeve is sleeved on the second working bearing, and a third boss is provided on the side of the second end sleeve away from the first side wall, the inner circumferential surface of the second end sleeve contacts the outer circumferential surface of the outer ring of the second working bearing, and the inner end surface of the third boss contacts the outer ring end surface of the second working bearing.

5. A bearing enhancement life test device according to claim 4, characterized in that: It also includes a left end sleeve, a middle end sleeve and a right end sleeve; the left end sleeve is a cylinder, the bottom of the cylinder is close to the first side wall, there is a gap between the bottom of the cylinder and the first side wall, and the left end sleeve is sleeved on the first end sleeve; the middle end sleeve is sleeved on the middle sleeve, and there is a gap between the middle end sleeve and the second side wall; the right end sleeve is a cylinder, the bottom of the cylinder is close to the box body, and the right end sleeve is sleeved on the second end sleeve, and the test shaft driving device passes through the bottom of the cylinder and is fixedly connected to the test shaft.

6. A bearing enhancement life test device according to claim 5, characterized in that: A radial loading device is arranged in the radial load application hole, and the radial loading device includes a radial hydraulic cylinder, and the cylinder piston of the radial hydraulic cylinder is pressed against the middle end sleeve; an axial loading device is arranged in the axial load application hole, and the axial loading device includes an axial hydraulic cylinder, and the cylinder piston of the axial hydraulic cylinder is pressed against the bottom of the left end sleeve body.

7. The bearing enhancement life test device according to claim 1, characterized in that: It also includes a transmission shaft and a driving device; the test shaft is connected to one end of the transmission shaft through a connecting hole of the test shaft driving device, and the other end of the transmission shaft is connected to the driving device.

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