Deflection state simulation test device for cylindrical roller bearing

Abstract

The invention discloses a deflection state simulation test device for a cylindrical roller bearing, and relates to a bearing test device. The invention aims to solve the problem that there is no device for a deflection state test of a cylindrical roller bearing in the prior art. Each test bearing seat comprises a seat body, two limiting glands and two inclined washers, the two inclined washers are arranged on the two sides of the test bearing respectively, the inclined planes of the two inclined washers are always kept in a parallel state, and the inclined planes of the inclined washers abut against the end face of the outer ring of the test bearing. The inclined gasket can be designed and machined according to the deflection angle required by the test. The seat body is sleeved on the outer ring of the test bearing, and the inner diameter of the seat body is larger than the outer diameter of the outer ring, so that the outer ring of the test bearing can generate angle deflection relative to the inner ring of the test bearing after the inclined gasket is tightly propped by the limiting gland, and the test of the bearing in different deflection states can be realized. The invention belongs to the technical field of bearing testing machines.

Description

Technical Field

[0001] The present invention relates to a bearing testing machine, specifically to a test device for simulating the skewed state of a cylindrical roller bearing, belonging to the technical field of bearing testing machines. Background Art

[0002] Cylindrical roller bearings play a role of rotational support in the transmission system, mainly bearing radial loads. However, when the bearings are installed and used, due to the influence of machining, positioning accuracy of the installation position, rotor skew, etc., skew inevitably occurs between the inner ring and the outer ring. Therefore, when designing the structure of cylindrical roller bearings, it is necessary to meet the usage requirements of the bearing skew angle. Otherwise, local edge contact will occur on the bearing raceway, generating large edge stresses, and ultimately leading to spalling failure, affecting the operation of the equipment.

[0003] Currently, through mathematical model calculations, the stress state of cylindrical roller bearings in the skewed state can be analyzed to further guide the optimization of their structural design. For the optimized bearings, a skewed state test still needs to be carried out to verify the design effect, but currently, there is no device for the skewed state test of cylindrical roller bearings.

[0004] Therefore, in view of the above technical problems, a bearing test device is proposed, which has become an urgent problem to be solved by those skilled in the art in the current field. Summary of the Invention

[0005] In view of the above deficiencies of the prior art, the present invention further provides a test device for simulating the skewed state of a cylindrical roller bearing.

[0006] The technical solution of the present invention is: a test device for simulating the skewed state of a cylindrical roller bearing, including a radial load unit, a radial loading mechanism, a stepped mandrel, and two test bearing seats.

[0007] The stepped mandrel includes a first shaft body, a shaft collar, and a second shaft body integrally arranged in sequence along its length direction.

[0008] A coupling is inserted into the inner hole of the second shaft body, and a first spacer ring, a radial load unit, a stepped bushing, and a second positioning nut are sequentially installed on the second shaft body. The two end faces of the first spacer ring are respectively abutted against the shaft collar and the radial load unit.

[0009] Test bearings are installed on both the first shaft body and the stepped bushing. The test bearing on the first shaft body is axially positioned by a first positioning nut, and the test bearing on the stepped bushing is axially positioned by a second positioning nut.

[0010] The test bearing seats and the radial loading mechanism are both installed on the support base, and the loading rod of the radial loading mechanism can abut against the radial load unit.

[0011] Both of the two test bearing seats include a seat body, two limiting gland plates and two bevel washers.

[0012] The two limiting gland plates are respectively installed on the two end faces of the seat body. The seat body is sleeved on the outer ring of the test bearing, and the inner diameter of the seat body is larger than the outer diameter of the outer ring.

[0013] A retaining lug is integrally arranged on the outer circumferential surface of the bevel washer, and a retaining groove is formed on the inner circumferential surface of the seat body. The two bevel washers are respectively arranged on both sides of the test bearing, and the inclined surfaces of the two bevel washers always remain parallel to each other. The inclined surface of the bevel washer abuts against the end face of the outer ring of the test bearing, and the flat surface of the bevel washer abuts against the limiting gland plate.

[0014] The present invention has the following effects compared with the prior art:

[0015] 1. Both of the two test bearing seats 11 of the present invention include a seat body 12, two limiting gland plates 4 and two bevel washers 3. The two bevel washers 3 are respectively arranged on both sides of the test bearing 2, and the inclined surfaces of the two bevel washers 3 always remain parallel to each other, and the inclined surface of the bevel washer 3 abuts against the end face of the outer ring of the test bearing 2. Further, the bevel washer 3 can be designed and processed according to the deflection angle required by the test.

[0016] Since the seat body 12 is sleeved on the outer ring of the test bearing 2, and the inner diameter of the seat body 12 is larger than the outer diameter of the outer ring, when the limiting gland plate 4 presses the bevel washer 3 tightly, the outer ring of the test bearing 2 can generate an angular deflection relative to its inner ring. With such a setting, the test of the test bearing 2 (i.e., the cylindrical roller bearing) in different deflection states can be realized, which can provide verification for its optimized design.

[0017] 2. The present invention adopts a symmetrical layout, and two bearings can be tested simultaneously in a single test, improving the test efficiency. Description of the Drawings

[0018] Figure 1 is the first cross-sectional view of the present invention;

[0019] Figure 2 is the second cross-sectional view of the present invention;

[0020] Figure 3 is the front view of the bevel washer 3 of the present invention;

[0021] Figure 4 is Figure 3 the cross-sectional view in the A direction in

[0022] In the figure: 1. First positioning nut; 2. Test bearing; 3. Taper washer; 4. Limit gland; 5. Step bearing housing; 6. Radial loading mechanism; 7. Second spacer ring; 8. End cover; 9. Second positioning nut; 10. Coupling; 11. Test bearing housing; 12. Housing body; 13. First spacer ring; 14. Ball bearing; 15. Step mandrel; 16. Step bushing; 20. Support base; 30. Radial load unit. Detailed implementation mode

[0023] The following further describes the technical solution of the present invention in conjunction with the accompanying drawings and through specific implementation modes. Obviously, the following described implementation modes are only a part of the implementation modes of the present invention, rather than all implementation modes. Based on the implementation modes in the present invention, all other implementation modes obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0024] Detailed implementation mode one: In combination with Figures 1 to 4 To illustrate this implementation mode, a test device for simulating the skewed state of a cylindrical roller bearing in this implementation mode includes a radial load unit 30, a radial loading mechanism 6, a step mandrel 15, and two test bearing housings 11.

[0025] The step mandrel 15 includes a first shaft body, a shaft collar, and a second shaft body that are integrally arranged in sequence along its length direction.

[0026] A coupling 10 is inserted into the inner hole of the second shaft body, and a first spacer ring 13, a radial load unit 30, a step bushing 16, and a second positioning nut 9 are sequentially installed on the second shaft body. The two end faces of the first spacer ring 13 are respectively abutted against the shaft collar and the radial load unit 30.

[0027] Test bearings 2 are installed on both the first shaft body and the step bushing 16. The test bearing 2 on the first shaft body is axially positioned by the first positioning nut 1, and the test bearing 2 on the step bushing 16 is axially positioned by the second positioning nut 9.

[0028] The test bearing housings 11 and the radial loading mechanism 6 are both installed on the support base 20, and the loading rod of the radial loading mechanism 6 can abut against the radial load unit 30.

[0029] Both of the two test bearing housings 11 include a housing body 12, two limit glands 4, and two taper washers 3.

[0030] The two limit glands 4 are respectively installed on the two end faces of the housing body 12. The housing body 12 is sleeved on the outer ring of the test bearing 2, and the inner diameter of the housing body 12 is larger than the outer diameter of the outer ring.

[0031] A retaining lug is integrally provided on the outer circumferential surface of the inclined washer 3, and a retaining groove adapted to the retaining lug is formed on the inner circumferential surface of the seat body 12; two inclined washers 3 are respectively arranged on both sides of the test bearing 2, and the inclined surfaces of the two inclined washers 3 always remain parallel to each other; the inclined surface of the inclined washer 3 abuts against the outer ring end face of the test bearing 2, and the flat surface of the inclined washer 3 abuts against the limit gland 4.

[0032] Specific Embodiment 2: In combination with Figures 1 to 4 This specific embodiment is described. In this specific embodiment, the radial load unit 30 includes a stepped bearing seat 5, a second spacer ring 7, an end cover 8, and two ball bearings 14.

[0033] The second spacer ring 7 and the two ball bearings 14 are both installed on the second shaft body, and the second spacer ring 7 is arranged between the two ball bearings 14. The two end faces of the first spacer ring 13 respectively abut against the shaft collar and the inner ring of one of the ball bearings 14; the two end faces of the stepped bushing 16 respectively abut against the second positioning nut 9 and the inner ring of the other ball bearing 14.

[0034] The stepped bearing seat 5 is sleeved on the outer ring of the ball bearing 14, and the loading rod of the radial loading mechanism 6 can abut against the stepped bearing seat 5; the end cover 8 is installed on one end face of the stepped bearing seat 5, and a limit step is integrally provided on the other end face of the stepped bearing seat 5. The outer ring of the ball bearing 14 is axially positioned through the end cover 8 and the limit step.

[0035] Other components and connection methods are the same as those in Specific Embodiment 1.

[0036] Specific Embodiment 3: In combination with Figures 1 to 4 This specific embodiment is described. In this specific embodiment, the radial loading mechanism 6 is a hydraulic cylinder.

[0037] Further, the limit gland 4 is installed on the end face of the seat body 12 by screws.

[0038] Further, the end cover 8 is installed on the end face of the stepped bearing seat 5 by screws.

[0039] Other components and connection methods are the same as those in Specific Embodiment 1 or 2.

[0040] Specific Embodiment 4: In combination with Figures 1 to 4 This specific embodiment is described. In this specific embodiment, the coupling 10 and the second shaft body are circumferentially fixed by spline connection. Other components and connection methods are the same as those in Specific Embodiments 1, 2, or 3.

[0041] Working Principle

[0042] In combination with Figures 1 to 4 The working principle of the present invention is described as follows:

[0043] The radial loading mechanism 6 and the two test bearing seats 11 are both installed on the support base 20. With such an arrangement, two bearings can be tested simultaneously in a single test, improving the test efficiency.

[0044] The two bevel washers 3 are respectively arranged on both sides of the test bearing 2, and the inclined surfaces of the two bevel washers 3 always remain parallel to each other, and the inclined surfaces of the bevel washers 3 abut against the outer ring end faces of the test bearing 2. At the same time, since the seat body 12 is sleeved on the outer ring of the test bearing 2 and the inner diameter of the seat body 12 is larger than the outer diameter of the outer ring, with such an arrangement, after the limit gland 4 presses the bevel washer 3 tightly, the outer ring of the test bearing 2 can generate an angular deflection relative to its inner ring. Further, the bevel washer 3 can be designed and processed according to the deflection angle required by the test.

[0045] Further, a stop ear is integrally provided on the outer circumferential surface of the bevel washer 3, and a stop groove adapted to the stop ear is formed on the inner circumferential surface of the seat body 12. With such an arrangement, the bevel washer 3 is circumferentially positioned within the seat body 12.

[0046] The loading rod of the radial loading mechanism 6 applies a radial force to the stepped bearing seat 5, and the radial force is transmitted to the stepped core shaft 15 through the ball bearing 14 and then evenly distributed to the two test bearings 2. With such an arrangement, a radial force is applied to the test bearing 2 in a deflected state. The external motor transmits power to the stepped core shaft 15 through the coupling 10 to drive the stepped core shaft 15 to rotate for testing.

[0047] The present invention has been disclosed in the above preferred embodiments, but it is not intended to limit the present invention. Any person skilled in the relevant art, without departing from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A test device for simulating the deflection state of a cylindrical roller bearing, characterized in that: It comprises a radial load unit (30), a radial loading mechanism (6), a stepped mandrel (15) and two test bearing seats (11); The stepped mandrel (15) comprises a first shaft body, a shaft ring and a second shaft body which are integrally arranged in sequence along the length direction thereof; A coupling (10) is inserted into the inner hole of the second shaft body, and a first spacing ring (13), a radial load unit (30), a stepped bushing (16) and a second positioning nut (9) are sequentially installed on the second shaft body, and both end surfaces of the first spacing ring (13) are respectively abutted against the shaft ring and the radial load unit (30); A test bearing (2) is installed on both the first shaft body and the stepped bushing (16); the test bearing (2) on the first shaft body is axially positioned by a first positioning nut (1), and the test bearing (2) on the stepped bushing (16) is axially positioned by a second positioning nut (9); The test bearing seat (11) and the radial loading mechanism (6) are both mounted on a support base (20), and a loading rod of the radial loading mechanism (6) is capable of abutting against a radial load unit (30); The two test bearing seats (11) each include a seat body (12), two limit glands (4) and two inclined washers (3); Two limit glands (4) are respectively mounted on the two end surfaces of the seat body (12); the seat body (12) is sleeved on the outer ring of the test bearing (2); and the inner diameter of the seat body (12) is greater than the outer diameter of the outer ring; A stop ear is integrally provided on the outer circumferential surface of the inclined washer (3), and a stop groove is provided on the inner circumferential surface of the seat body (12); the two inclined washers (3) are respectively arranged on both sides of the test bearing (2), and the inclined surfaces of the two inclined washers (3) always remain parallel to each other; the inclined surfaces of the inclined washers (3) abut against the outer ring end surface of the test bearing (2), and the plane of the inclined washers (3) abuts against the limit pressure cover (4).

2. A test device for simulating the deflection state of a cylindrical roller bearing according to claim 1, characterized in that: The radial load unit (30) comprises a stepped bearing seat (5), a second spacer ring (7), an end cover (8) and two ball bearings (14); The second spacer ring (7) and the two ball bearings (14) are both mounted on the second shaft body, and the second spacer ring (7) is arranged between the two ball bearings (14); The stepped bearing seat (5) is sleeved on the outer ring of the ball bearing (14), and the loading rod of the radial loading mechanism (6) can abut against the stepped bearing seat (5); the end cover (8) is installed on one end surface of the stepped bearing seat (5), and the other end surface of the stepped bearing seat (5) is integrally provided with a limiting step, and the ball bearing (14) is axially positioned by the end cover (8) and the limiting step.

3. A test device for simulating the deflection state of a cylindrical roller bearing according to claim 2, characterized in that: The radial loading mechanism (6) is a hydraulic cylinder.

4. A test device for simulating the deflection state of a cylindrical roller bearing according to claim 3, characterized in that: The limiting pressure cover (4) is mounted on the end surface of the seat body (12) by means of screws.

5. The test device for simulating the deflection state of a cylindrical roller bearing according to claim 2, characterized in that: The end cover (8) is mounted on the end surface of the stepped bearing seat (5) by means of screws.

6. A test device for simulating a deflection state of a cylindrical roller bearing according to claim 1, characterized in that: The coupling (10) and the second shaft body are connected by a spline to achieve circumferential fixation.

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