A load simulation test device for bearing retainer

Abstract

The present invention proposes a load simulation test device for a bearing retainer, comprising: a workbench; a movable part, which is movably installed on the surface of the workbench, and the bearing retainer and the roller can be placed above the movable part; a pressure member, which is liftably arranged above the movable part and is arranged to apply pressure to the roller above the movable part when the movable part moves; a ballast member, which is installed below the pressure member and forms a raceway with the movable part for accommodating the retainer and the roller; the present invention has a reasonable design structure. On the one hand, it can simulate the actual rotation radius of the retainer when working, and meet the actual working conditions in terms of size. On the other hand, the roller can be pressed by the pressure member, so that the roller moves under pressure, thereby simulating the actual stress state of the retainer. After the retainer is damaged or broken, the actual service life of the retainer can be calculated. The present invention has the advantages of simple operation and high precision.

Description

Technical Field

[0001] The invention belongs to the technical field of retainer testing, and in particular relates to a load simulation testing device for a bearing retainer. Background Art

[0002] A bearing retainer (also called a cage) is a bearing component that partially encloses all or part of the rolling elements and moves with them to isolate the rolling elements and usually guide and retain them in the bearing. The reliability and performance of bearings are critical to all rotating mechanical equipment. Therefore, monitoring and maintaining the condition of bearings, especially the condition of bearing cages, is very important to prevent failures, extend equipment life and reduce maintenance costs.

[0003] However, in the prior art, the test of the service life of the bearing retainer is difficult and has low accuracy. The main reason is that the actual operating conditions of the retainer cannot be simulated during the test. For example, when the turntable bearing of a wind turbine is working, due to the complex working conditions, different rollers inside it are subjected to uneven forces during actual operation, which leads to different loads at different positions of the retainer. However, the test device in the prior art cannot simulate this situation. Therefore, there is an urgent need for a load simulation test device for the bearing retainer that can simulate its specific operating conditions to solve the above problems. Summary of the invention

[0004] The present invention provides a load simulation test device for a bearing retainer, which is used to solve the problem that the existing test device mentioned in the above background technology cannot simulate the actual working conditions of the retainer, resulting in great test difficulty and low accuracy.

[0005] The technical solution adopted by the present invention is: a load simulation test device for a bearing retainer, comprising:

[0006] Workbench;

[0007] The movable part is movably mounted on the workbench surface, the bearing retainer and the roller can be placed above the movable part, the retainer is a frame structure with a single pocket, and multiple retainers are arranged end to end and placed above the movable part, and the roller is placed in the pocket of the retainer;

[0008] A pressure member, which is escalably arranged above the movable member and is arranged to apply pressure to the roller above the movable member when the movable member moves; both the movable member and the ballast member are arc-shaped structures;

[0009] The ballast member is installed below the pressure member, and forms a raceway with the movable member for accommodating the retainer and the roller. When working, the ballast member contacts the roller and applies pressure to the roller under the action of the pressure member. The contact area between the ballast member and the pressure member decreases from the middle to both sides of the ballast member, so that when the ballast member contacts the upper pressure member, the force transmitted by the ballast member to the lower roller gradually decreases from the middle to both sides, so as to simulate the actual working state in which the local roller load is large and the other roller loads are small.

[0010] A horizontal driving member is installed on the workbench and is configured to drive the movable member to move on the workbench surface; the horizontal driving member comprises a bracket installed on the side of the workbench, a driving cylinder is hinged on the upper surface of the bracket, and the end of the telescopic rod of the driving cylinder is hinged at the end position of the movable member;

[0011] A guide assembly is arranged on the workbench and is arranged to make the movable member move in an arc along a specified movable radius when the horizontal driving member drives the movable member to move;

[0012] The support member is arranged on the workbench and is located below the movable member, and is arranged to support the movable member during its movement and reduce the friction force of the movable member during its movement.

[0013] The movable part and the ballast part are both arc-shaped structures.

[0014] The cross section of the ballast member is an L-shaped structure, the middle part of the ballast member is connected to the upper pressure member through bolts, and the lower surface of the pressure member is in contact with the upper surface of the ballast member.

[0015] The guide assembly comprises at least two first guide wheels and at least one second guide wheel installed on the surface of the workbench, and the first guide wheels and the second guide wheels are respectively located at two sides of the movable part.

[0016] The horizontal driving member comprises a bracket installed on the side of the workbench, a driving cylinder is hinged on the upper surface of the bracket, and the end of the telescopic rod of the driving cylinder is hinged at the end position of the movable member.

[0017] The invention also includes a supporting member, which is arranged on the workbench and located below the movable member, and is arranged to support the movable member during its movement and reduce the friction force of the movable member during its movement.

[0018] The pressurizing member includes a top plate, a bottom plate, and a reinforcing plate connecting the top plate and the bottom plate.

[0019] The device also includes a pressure driving member, which is installed at the four corners of the workbench and connected to the pressure member, and is configured to provide a vertical force to the pressure member.

[0020] The upper surface of the ballast member is provided with a plurality of convex strips, and the lengths of the convex strips gradually decrease from the middle position of the ballast member to both sides.

[0021] The beneficial effects of the present invention are:

[0022] (1) The design structure of the present invention is reasonable. On the one hand, it can simulate the actual turning radius of the cage when working, and the size meets the actual working conditions. On the other hand, the roller can be pressed by the pressure member, so that the roller moves under pressure, thereby simulating the actual stress state of the cage. After the cage is damaged or broken, the actual service life of the cage can be calculated. It has the advantages of simple operation and high precision.

[0023] (2) The contact area between the ballast member and the pressure member of the present invention decreases gradually from the middle of the ballast member to both sides. When the pressure member applies pressure to the ballast member, the lower roller near the middle of the pressure member is subjected to a large load, while the lower roller near the two ends of the pressure member is subjected to a small load. This simulates the actual uneven force on the roller, and then simulates the actual uneven force on the retaining frame, resulting in better test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A perspective view of the present invention;

[0025] Figure 2 An exploded view of the present invention;

[0026] Figure 3 A three-dimensional diagram of a pressure member of the present invention;

[0027] Figure 4 A three-dimensional ballast member according to an embodiment of the present invention Figure 1 ;

[0028] Figure 5 A three-dimensional ballast member according to an embodiment of the present invention Figure 2 ;

[0029] Figure 6 A three-dimensional diagram of a ballast member according to another embodiment of the present invention

[0030] Figure 7 The three-dimensional movable part of the present invention Figure 1 ;

[0031] Figure 8 The three-dimensional movable part of the present invention Figure 2 ;

[0032] Fig. 9 It is a three-dimensional view of the bearing retainer and roller of the present invention.

[0033] in:

[0034] 1. Workbench; 2. Pressurized member; 201. Top plate; 202. Reinforcement plate; 203. Bottom plate; 3. Ballast member; 301. Threaded hole; 302. Raised strip; 4. Movable member; 401. Arc groove; 5. Support member; 6. Driving cylinder; 7. Bracket; 8. First guide wheel; 9. Second guide wheel; 10. Pressurized driving member; 11. Retainer; 12. Roller. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] As shown in the figure, a load simulation test device for a bearing retainer includes a workbench;

[0037] The movable part 4 is movably mounted on the surface of the workbench 1, and the bearing retainer 11 and the roller 12 can be placed above the movable part 4; in this example, the retainer 11 is a frame structure with a single pocket, and multiple retainers 11 are arranged end to end and placed above the movable part 4, and the roller 12 is placed in the pocket of the retainer 11 to simulate the state of the retainer 11 in actual work, wherein the movable part 4 is an arc-shaped structure, and its upper surface near the center of the circle is a convex structure to simulate the inner ring structure of the actual bearing (because the inner ring of the bearing rotates during actual work, the movable part 4 is designed as a movable structure, which can also simulate the state of the inner ring rotation of the bearing).

[0038] In order to facilitate the movement of the movable part 4 and make the movable part 4 simulate the rotation of the inner ring of the bearing, the simulation test device also includes a support member 5, which is arranged on the workbench 1 and is located below the movable part 4, and is configured to support the movable part 4 during the movement of the movable part 4 and reduce the friction force of the movable part 4 when the movable part 4 moves; in this example, the middle part of the lower surface of the movable part 4 has an inwardly concave arc groove 401, and the retainer 11 and the roller 12 are also installed in the arc groove 401. The retainer 11 and the roller 12 in the arc groove 401 serve as a support member 5 for facilitating the movement of the movable part 4, so that the movable part 4 can move on the workbench 1.

[0039] The pressure member 2 is liftably arranged above the movable member 4, and is arranged to apply pressure to the roller 12 above the movable member 4 when the movable member 4 moves; wherein the pressure member 2 includes a top plate 201, a bottom plate 203 and a reinforcing plate 202 connecting the top plate 201 and the bottom plate 203, so that the pressure member 2 is a frame structure as a whole. Compared with a flat plate structure, its structural stability is better, deformation problems are not easily generated, and the accuracy of the test results is contributed to.

[0040] The ballast member 3 is installed below the pressure member 2 and forms a raceway with the movable member 4 for accommodating the retainer 11 and the roller 12 . When working, the ballast member 3 contacts the roller 12 and applies pressure to the roller 12 under the action of the pressure member 2 .

[0041] The contact area between the ballast member 3 and the pressure member 2 decreases from the middle of the ballast member 3 to the sides. This arrangement is to ensure that in the process of transmitting the force to the roller 12 below through the ballast member 3, the roller 12 below the middle of the ballast member 3 is subjected to a large force, while the roller 12 below the two sides of the ballast member 3 is subjected to a small force. This is because the closer to the two sides of the ballast member 3, the greater the degree of bending deformation of the ballast member 3 due to the smaller contact area. Due to its bending deformation, the force applied to the roller 12 below will be smaller than that in the middle. For example, in extreme cases, when the ballast member 3 is in contact with the upper pressure member 2 only in the middle position, and the two sides are not in contact with the pressure member 2, the degree of bending deformation (bending upward) of the two sides of the ballast member 3 is the largest, and thus the force applied to the roller 12 below will be reduced, thereby achieving the effect of different loads on the rollers 12 at different positions below.

[0042] The ballast member 3 is an arc-shaped structure, and the cross section of the ballast member 3 is an L-shaped structure. The middle part of the ballast member 3 is connected to the upper pressure member 2 by bolts, and the lower surface of the pressure member 2 is in contact with the upper surface of the ballast member 3. During the test, the ballast member 3 is installed below the pressure member 2 to simulate the working state that the outer ring of the bearing is in a static state during actual operation. The cross section of the ballast member 3 is an L-shaped structure to combine with the movable member 4, so that a raceway can be formed between the two to facilitate the movement of the retainer 11 and the roller 12, and the actual working state of the retainer 11 can be more realistically simulated.

[0043] In one embodiment, Figure 4-5As shown, the upper surface of the ballast member 3 is wide in the middle and narrow at both ends, that is, in this example, the upper edge ridge of the arc-shaped ballast member 3 is chamfered. The uneven chamfering makes the distance from the side to the chamfer root in the middle of the ballast member 3 a, and the distance from the side to the chamfer root at the two ends of the ballast member 3 is b, where a<b. This arrangement is mainly to form a certain gradient distribution of the compressive loads of the rollers 12 at different positions when pressure is applied to the lower roller 12, that is, the loads on the rollers 12 at different positions are different. This is because during the use of the bearing, for example, the turntable bearing of a wind turbine, the force on different rollers inside the turntable bearing will be uneven due to fluctuations in wind speed, load, torque, etc. The ballast member 3 is set to be wide in the middle and narrow at both ends to change the contact area between the ballast member 3 and the pressure member 2, so as to achieve the purpose of different loads on the lower roller 12 at different positions, which is more in line with the stress state of the roller 12 at various positions in the actual bearing and has a better simulation effect. In this example, a threaded hole 301 is opened in the middle of the upper surface of the ballast member 3 to connect with the upper pressure member 2 by bolt connection.

[0044] In another embodiment, if Figure 6 As shown, the upper surface of the ballast member 3 has a plurality of convex strips 302, and the length of the convex strips 302 gradually decreases from the middle position of the ballast member 3 to both sides, so as to realize that when in contact with the upper pressure member 2, the force transmitted by the ballast member 3 to the lower roller gradually decreases from the middle to both sides, so as to simulate the actual working state in which the local roller load is large and the other roller loads are small.

[0045] A horizontal driving member is installed on the workbench 1 and is configured to drive the movable member 4 to move on the surface of the workbench 1. In this example, the horizontal driving member includes a bracket 7 installed on the side of the workbench 1, and a driving cylinder 6 is hinged on the upper surface of the bracket 7. The end of the telescopic rod of the driving cylinder 6 is hinged at the end position of the movable member 4. The driving cylinder 6 can be used to drive the movable member 4 to move on the surface of the workbench 1.

[0046] A guide assembly is arranged on the workbench 1, and is configured to make the movable part 4 move in an arc along a specified movable radius when the horizontal driving part drives the movable part 4 to move, wherein the guide assembly includes at least two first guide wheels 8 and at least one second guide wheel 9 installed on the surface of the workbench 1, and the first guide wheel 8 and the second guide wheel 9 are respectively located on both sides of the movable part 4; in this example, the first guide wheel 8 is located at the outer side of the arc-shaped movable part 4, and the second guide wheel 9 is located at the inner side of the arc-shaped movable part 4, there are two first guide wheels 8 and one second guide wheel 9, which can jointly limit the movable part 4, so that the movable part 4 simulates the rotation radius of the inner ring of the bearing to move.

[0047] It also includes a pressure driving member 10, which is installed at the four corners of the workbench 1 and is connected to the pressure member 2, and is configured to provide a vertical force to the pressure member 2. In this example, the pressure driving member 10 is a hydraulic cylinder, and four hydraulic cylinders are connected to the pressure member 2 to drive the pressure member 2 to move downward during the test, thereby applying pressure to the roller 12.

[0048] When using the load simulation test device for the bearing retainer 11, after the bearing retainer 11 and the roller 12 are assembled, they are placed above the movable part 4, and the pressure-applying driving part 10 drives the pressure-applying part 2 to move downward, so that the ballast part 3 contacts and applies pressure to the roller 12 to simulate the stress state of the roller 12 during actual operation. When the roller 12 is under pressure, the horizontal driving part is used to drive the movable part 4 to move in an arc of a specified radius to simulate the size of the actual bearing, and the telescopic rod of the driving cylinder 6 drives the movable part 4 to move back and forth until the retainer 11 is worn, deformed or broken, and then the test is stopped. At this time, the actual service life of the bearing retainer 11 can be calculated. Since the actual working conditions are simulated in terms of size and force, the test results are more accurate and have more reference value.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A load simulation test device for a bearing retainer, characterized in that: include: Workbench; The movable part is movably mounted on the workbench surface, the bearing retainer and the roller can be placed above the movable part, the retainer is a frame structure with a single pocket, and multiple retainers are arranged end to end and placed above the movable part, and the roller is placed in the pocket of the retainer; A pressure member, which is escalably arranged above the movable member and is arranged to apply pressure to the roller above the movable member when the movable member moves; both the movable member and the ballast member are arc-shaped structures; The ballast member is installed below the pressure member, and forms a raceway with the movable member for accommodating the retainer and the roller. When working, the ballast member contacts the roller and applies pressure to the roller under the action of the pressure member. The contact area between the ballast member and the pressure member decreases from the middle to both sides of the ballast member, so that when the ballast member contacts the upper pressure member, the force transmitted by the ballast member to the lower roller gradually decreases from the middle to both sides, so as to simulate the actual working state in which the local roller load is large and the other roller loads are small. A horizontal driving member is installed on the workbench and is configured to drive the movable member to move on the workbench surface; the horizontal driving member comprises a bracket installed on the side of the workbench, a driving cylinder is hinged on the upper surface of the bracket, and the end of the telescopic rod of the driving cylinder is hinged at the end position of the movable member; A guide assembly is arranged on the workbench and is arranged to make the movable member move in an arc along a specified movable radius when the horizontal driving member drives the movable member to move; The support member is arranged on the workbench and is located below the movable member, and is arranged to support the movable member during its movement and reduce the friction force of the movable member during its movement.

2. A load simulation test device for a bearing retainer according to claim 1, characterized in that: The cross section of the ballast member is an L-shaped structure, the middle portion of the ballast member is connected to the upper pressure member through bolts, and the lower surface of the pressure member is in contact with the upper surface of the ballast member.

3. A load simulation test device for a bearing retainer according to claim 1, characterized in that: The guide assembly comprises at least two first guide wheels and at least one second guide wheel installed on the surface of the workbench, and the first guide wheel and the second guide wheel are respectively located at two sides of the movable part.

4. A load simulation test device for a bearing retainer according to claim 1, characterized in that: The pressurizing member includes a top plate, a bottom plate, and a reinforcing plate connecting the top plate and the bottom plate.

5. A load simulation test device for a bearing retainer according to claim 1, characterized in that: It also includes a pressurizing driving member, which is installed at the four corners of the workbench and connected to the pressurizing member, and is configured to provide a vertical force to the pressurizing member.

6. A load simulation test device for a bearing retainer according to claim 1, characterized in that: The upper surface of the ballast member is provided with a plurality of convex strips, and the lengths of the convex strips gradually decrease from the middle position of the ballast member to both sides.

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