Bearing testing machine for cylindrical roller bearing

Abstract

The invention relates to a bearing testing machine, in particular to a bearing testing machine for a cylindrical roller bearing. The invention aims to solve the problems that when the size of a tested bearing is changed, the universality of parts of the bearing testing machine is not strong, so that the design work of the bearing testing machine is tedious, and a large amount of manpower and design time are consumed. The device comprises a coupling, a first step bushing, a test mandrel, a second step bushing, a load bearing seat, a loading sliding sleeve, an axial loading mechanism and a radial loading mechanism. The inner ring of the test bearing is sleeved on the second shaft body of the test mandrel, and the outer ring of the test bearing is embedded in the first step bushing; when the size of the test bearing is changed, only the flange plate, the locking nut, the first step bushing, the first shaft body of the test mandrel and the second shaft body of the test mandrel need to be redesigned, and other parts are universal, so that the design workload of the bearing testing machine is greatly reduced. The invention belongs to the technical field of bearing testing machines.

Description

Technical Field

[0001] The invention relates to a bearing testing machine, in particular to a bearing testing machine for a cylindrical roller bearing, and belongs to the technical field of bearing testing machines. Background Art

[0002] Cylindrical roller bearings without flanges on the outer ring are widely used in various industrial fields due to their high load-bearing capacity, easy installation and disassembly, strong adaptability and high precision. To ensure the quality of bearings, performance and durability tests are required before leaving the factory. The test conditions have requirements such as speed and radial load.

[0003] At present, this type of cylindrical roller bearings still use the most traditional test scheme when testing, that is, the two test bearings are arranged in the middle of the shaft system or at both ends of the shaft system. This scheme leads to a large workload and low efficiency when installing and disassembling the test bearings, and the shaft system needs to be completely disassembled to complete the installation; and when the size of the test bearing changes, most of the parts of the test machine need to be redesigned, which requires a lot of manpower and time.

[0004] Therefore, in view of the above technical problems, a bearing testing machine is proposed, which has become a problem to be solved urgently by technicians in this field. Summary of the invention

[0005] The present invention aims at overcoming the above-mentioned deficiencies in the prior art and further provides a bearing testing machine for cylindrical roller bearings.

[0006] The technical solution of the present invention is: a bearing testing machine for cylindrical roller bearings, including a coupling, a first step bushing, a test mandrel, a second step bushing, a load bearing seat, a loading sleeve, an axial loading mechanism and a radial loading mechanism.

[0007] The first stepped bushing and the second stepped bushing are both installed in the seat hole of the split housing.

[0008] The outer ring of the test bearing is embedded in the first step bushing, and the first limit pressure cover and flange are installed on the two end surfaces of the first step bushing respectively; the outer ring of the test bearing is axially limited by the first limit pressure cover and the positioning steps of the inner hole of the first step bushing.

[0009] The test mandrel comprises a first shaft body, a second shaft body, a shaft ring and a third shaft body which are integrally arranged in sequence along the length direction thereof, and a coupling is installed on the end face of the first shaft body.

[0010] The inner ring of the test bearing is sleeved on the second shaft body, and two locking nuts are installed on the first shaft body. The inner ring of the test bearing is axially limited by the locking nut and one end face of the shaft ring, and the outer circumferential surface of the locking nut is connected to the inner hole of the flange through a labyrinth seal.

[0011] The first load bearing, the first spacer ring, the second load bearing, the second spacer ring, the second angular contact ball bearing and the first angular contact ball bearing are sequentially mounted on the third shaft body.

[0012] The inner ring of the first load bearing abuts against the other end face of the shaft ring, the end face of the third shaft body is installed with a third limiting gland, and the end face of the third limiting gland abuts against the inner ring of the first angular contact ball bearing.

[0013] The load bearing seat is mounted on the outer rings of the first load bearing and the second load bearing. The outer rings of the second angular contact ball bearing and the first angular contact ball bearing are both embedded in the second stepped bushing, and the outer ring of the second angular contact ball bearing abuts against the positioning step of the inner hole of the second stepped bushing.

[0014] The loading sleeve is slidably connected to the inner hole of the second stepped bushing, and the end surface of the loading sleeve abuts against the outer ring of the first angular contact ball bearing.

[0015] The axial loading mechanism and the radial loading mechanism are both installed on the split housing. The axial loading mechanism is coaxially arranged with the test mandrel, and the radial loading mechanism is arranged perpendicularly to the axis of the test mandrel. The loading rod of the radial loading mechanism can be abutted against the load bearing seat, and the loading rod of the axial loading mechanism can be abutted against the loading sleeve.

[0016] Compared with the prior art, the present invention has the following effects:

[0017] 1. The present invention adopts a modular design. The test bearing 1 is easy to install and disassemble on the test mandrel 7 and the first step bushing 5. When the size of the test bearing 1 changes, it is only necessary to redesign the flange 3, the locking nut 4, the first step bushing 5, the first shaft body of the test mandrel 7 and the second shaft body of the test mandrel 7, while other parts are universal, which greatly reduces the design workload of the bearing testing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the assembly of the test bearing 1, the coupling 2, the flange 3, the locking nut 4, the first stepped bushing 5, the first limiting gland 6 and the test mandrel 7 of the present invention;

[0020] Figure 3 yes Figure 1 A partial enlarged view of point Ⅰ in the middle;

[0021] Figure 4 yes Figure 1 A partial enlarged view of point II in the middle.

[0022] In the figure: 1. test bearing; 2. coupling; 3. flange; 4. locking nut; 5. first step bushing; 6. first limit cover; 7. test mandrel; 8. second limit cover; 9-1. first load bearing; 9-2. second load bearing; 10. load bearing seat; 11. first spacer ring; 12. second spacer ring; 13. second step bushing; 14-1. first angular contact ball bearing; 14-2. second angular contact ball bearing; 15. third limit cover; 16. loading sleeve; 17. axial loading mechanism; 18. radial loading mechanism; 20. split housing. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and through specific implementations. Obviously, the implementations described below are only part of the implementations of the present invention, not all of the implementations. Based on the implementations in the present invention, all other implementations obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0024] Specific implementation method 1: Combination Figures 1 to 4 To illustrate the present embodiment, a bearing testing machine for a cylindrical roller bearing of the present embodiment includes a coupling 2, a first step bushing 5, a test core shaft 7, a second step bushing 13, a load bearing seat 10, a loading sleeve 16, an axial loading mechanism 17 and a radial loading mechanism 18.

[0025] The first stepped bushing 5 and the second stepped bushing 13 are both installed in the seat hole of the split housing 20 .

[0026] The outer ring of the test bearing 1 is embedded in the first stepped bushing 5 , and the first limit gland 6 and the flange 3 are respectively installed on both end surfaces of the first stepped bushing 5 .

[0027] The first limiting pressure cover 6 is installed on the end surface of the first stepped bushing 5 by means of screws, and the outer ring of the test bearing 1 is axially limited by the first limiting pressure cover 6 and the positioning steps of the inner hole of the first stepped bushing 5.

[0028] The test mandrel 7 comprises a first shaft body, a second shaft body, a shaft ring and a third shaft body which are integrally arranged in sequence along its length direction, and the coupling 2 is installed on the end face of the first shaft body; further, the coupling 2 is connected to the first shaft body of the test mandrel 7 by threads.

[0029] The inner ring of the test bearing 1 is mounted on the second shaft body, and two locking nuts 4 are installed on the first shaft body. The inner ring of the test bearing 1 is axially limited by the locking nut 4 and one end face of the shaft ring, and the outer circumferential surface of the locking nut 4 is connected to the inner hole of the flange 3 through a labyrinth seal. This arrangement can prevent leakage of lubricating oil in the split housing 20.

[0030] The first load bearing 9-1, the first spacer ring 11, the second load bearing 9-2, the second spacer ring 12, the second angular contact ball bearing 14-2 and the first angular contact ball bearing 14-1 are sequentially mounted on the third shaft.

[0031] The inner ring of the first load bearing 9-1 is against the other end face of the shaft ring, and the end face of the third shaft body is installed with a third limit cover 15, and the third limit cover 15 is installed on the end face of the third shaft body by screws. The end face of the third limit cover 15 is against the inner ring of the first angular contact ball bearing 14-1. This arrangement can prevent the first load bearing 9-1, the second load bearing 9-2, the second angular contact ball bearing 14-2 and the first angular contact ball bearing 14-1 from axially moving on the third shaft body.

[0032] The load bearing seat 10 is mounted on the outer rings of the first load bearing 9-1 and the second load bearing 9-2, and both the first load bearing 9-1 and the second load bearing 9-2 are cylindrical roller bearings.

[0033] The outer rings of the second angular contact ball bearing 14 - 2 and the first angular contact ball bearing 14 - 1 are both embedded in the second stepped bushing 13 , and the outer ring of the second angular contact ball bearing 14 - 2 abuts against the positioning step of the inner hole of the second stepped bushing 13 .

[0034] The loading sleeve 16 is slidably connected to the inner hole of the second stepped bushing 13 , and the end surface of the loading sleeve 16 abuts against the outer ring of the first angular contact ball bearing 14 - 1 .

[0035] The axial loading mechanism 17 and the radial loading mechanism 18 are both installed on the split housing 20. The axial loading mechanism 17 is coaxially arranged with the test mandrel 7, and the radial loading mechanism 18 is arranged perpendicular to the axis of the test mandrel 7. The loading rod of the radial loading mechanism 18 can be abutted against the load bearing seat 10, and the loading rod of the axial loading mechanism 17 can be abutted against the loading sleeve 16.

[0036] In the present embodiment, both the first angular contact ball bearing 14-1 and the second angular contact ball bearing 14-2 are angular contact ball bearings with drawing grooves on the inner ring. This arrangement, on the one hand, facilitates the removal of the bearings from the test spindle 7; on the other hand, the width of the inner ring of the angular contact ball bearing is greater than the width of the outer ring, and there is no need to install a spacer ring between the first angular contact ball bearing 14-1 and the second angular contact ball bearing 14-2.

[0037] Specific implementation method 2: Combination Figure 1 To explain this embodiment, the axial loading mechanism 17 and the radial loading mechanism 18 in this embodiment are both hydraulic cylinders. Other components and connection methods are the same as those in the first embodiment.

[0038] Specific implementation method three: Combination Figure 1and Figure 3 To illustrate this embodiment, in this embodiment, the second limit pressure covers 8 are respectively installed on the two end faces of the load bearing seat 10, and the second limit pressure covers 8 are installed on the end faces of the load bearing seat 10 by screws. Other components and connection methods are the same as those of specific embodiments one or two.

[0039] How it works

[0040] Combination Figures 1 to 4 The working principle of the present invention is described:

[0041] The coupling 2 is installed on the first shaft end face of the test mandrel 7, and the driving force from the power system is transmitted through the coupling 2 to make the test mandrel 7 rotate.

[0042] After the loading rod of the axial loading mechanism 17 is against the loading sleeve 16, the transmission route of the axial loading force is: loading sleeve 16 → outer ring of the first angular contact ball bearing 14-1 → rolling element of the first angular contact ball bearing 14-1 → inner ring of the first angular contact ball bearing 14-1 → inner ring of the second angular contact ball bearing 14-2 → rolling element of the second angular contact ball bearing 14-2 → outer ring of the second angular contact ball bearing 14-2. With this arrangement, the axial loading force pre-tightens the second angular contact ball bearing 14-2 and the first angular contact ball bearing 14-1, thereby preventing the axial clearance between the second angular contact ball bearing 14-2 and the first angular contact ball bearing 14-1 from affecting the test results.

[0043] After the loading rod of the radial loading mechanism 18 abuts against the load bearing seat 10, the transmission route of the radial loading force is: load bearing seat 10 → first load bearing 9-1 and second load bearing 9-2 → test core shaft 7 → test bearing 1. In this way, a radial load is applied to the test bearing 1.

[0044] When the size of the test bearing 1 changes, it is only necessary to redesign the flange 3, the locking nut 4, the first step bushing 5, the first shaft body of the test mandrel 7 and the second shaft body of the test mandrel 7, which greatly reduces the design workload of the bearing testing machine.

[0045] The present invention has been disclosed as above in the form of a preferred embodiment, but it is not intended to limit the present invention. Any simple modification, equivalent changes and modifications made to the above implementation cases by any professional and technical personnel who do not deviate from the content of the technical solution of the present invention and based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A bearing testing machine for cylindrical roller bearings, characterized in that: It comprises a coupling (2), a first step bushing (5), a test mandrel (7), a second step bushing (13), a load bearing seat (10), a loading sleeve (16), an axial loading mechanism (17) and a radial loading mechanism (18); The first stepped bushing (5) and the second stepped bushing (13) are both installed in the seat hole of the split housing (20); The outer ring of the test bearing (1) is embedded in the first stepped bushing (5), and the first limit gland (6) and the flange (3) are respectively installed on the two end surfaces of the first stepped bushing (5); the outer ring of the test bearing (1) is axially limited by the first limit gland (6) and the positioning step of the inner hole of the first stepped bushing (5); The test mandrel (7) comprises a first shaft body, a second shaft body, a shaft ring and a third shaft body which are integrally arranged in sequence along the length direction thereof, and the coupling (2) is mounted on the end surface of the first shaft body; The inner ring of the test bearing (1) is sleeved on the second shaft body, and two locking nuts (4) are installed on the first shaft body. The inner ring of the test bearing (1) is axially limited by the locking nut (4) and one end face of the shaft ring, and the outer circumferential surface of the locking nut (4) is connected to the inner hole of the flange (3) through a labyrinth seal; The third shaft body is sequentially mounted with a first load bearing (9-1), a first spacing ring (11), a second load bearing (9-2), a second spacing ring (12), a second angular contact ball bearing (14-2) and a first angular contact ball bearing (14-1); The inner ring of the first load bearing (9-1) abuts against the other end face of the shaft ring, the end face of the third shaft body is installed with a third limiting gland (15), and the end face of the third limiting gland (15) abuts against the inner ring of the first angular contact ball bearing (14-1); The load bearing seat (10) is mounted on the outer rings of the first load bearing (9-1) and the second load bearing (9-2); the outer rings of the second angular contact ball bearing (14-2) and the first angular contact ball bearing (14-1) are both embedded in the second stepped bushing (13); and the outer ring of the second angular contact ball bearing (14-2) abuts against the positioning step of the inner hole of the second stepped bushing (13); The loading sleeve (16) is slidably connected to the inner hole of the second stepped bushing (13), and the end surface of the loading sleeve (16) abuts against the outer ring of the first angular contact ball bearing (14-1); The axial loading mechanism (17) and the radial loading mechanism (18) are both installed on the split housing (20); the axial loading mechanism (17) is coaxially arranged with the test mandrel (7), and the radial loading mechanism (18) is perpendicularly arranged with the axis of the test mandrel (7); the loading rod of the radial loading mechanism (18) can abut against the load bearing seat (10), and the loading rod of the axial loading mechanism (17) can abut against the loading sleeve (16).

2. A bearing testing machine for cylindrical roller bearings according to claim 1, characterized in that: The coupling (2) is connected to the first shaft body of the test mandrel (7) via threads.

3. A bearing testing machine for cylindrical roller bearings according to claim 1, characterized in that: The axial loading mechanism (17) and the radial loading mechanism (18) are both hydraulic cylinders.

4. A bearing testing machine for cylindrical roller bearings according to claim 1, characterized in that: The first load bearing (9-1) and the second load bearing (9-2) are both cylindrical roller bearings.

5. A bearing testing machine for cylindrical roller bearings according to claim 1, characterized in that: The first limiting gland (6) is mounted on the end surface of the first stepped bushing (5) by means of screws.

6. A bearing testing machine for cylindrical roller bearings according to claim 1, characterized in that: Second limit pressure covers (8) are respectively installed on both end surfaces of the load bearing seat (10), and the second limit pressure covers (8) are installed on the end surfaces of the load bearing seat (10) by means of screws.

7. A bearing testing machine for cylindrical roller bearings according to claim 1, characterized in that: The third limiting gland (15) is mounted on the end surface of the third shaft body by means of screws.

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