Bearing material rolling contact fatigue test equipment

Abstract

The utility model discloses bearing material rolling contact fatigue test equipment which comprises an upper gland, a plurality of upper rolling bodies, a left side fixing plate, a right side fixing plate, a plurality of lower rolling bodies, a lower gland, an upper test head shaft, a test machine base and a lower test head shaft. The upper rolling body is in rolling fit with the upper surface of the bearing sample; the lower test head shaft is in driving connection with a second motor and can ascend and descend in the vertical direction, and the lower rolling body is used for being attached to the lower surface of the bearing sample in a rolling mode; and the bearing sample is limited and clamped by the left side fixing plate and the right side fixing plate. The bearing material rolling contact fatigue test equipment provided by the utility model can carry out bidirectional load loading on the upper surface and the lower surface of the bearing material, can simulate the rolling contact fatigue condition of a bearing in actual working conditions more truly, and provides powerful reference for performance evaluation and optimization of the bearing material.

Description

Technical Field

[0001] The utility model relates to the technical field of fatigue life testing of bearing materials, and more specifically, to a rolling contact fatigue test device for bearing materials. Background Art

[0002] During the operation of a bearing, due to the action of rolling contact, the bearing material may suffer fatigue damage, which may ultimately lead to bearing failure.

[0003] Chinese Patent CN 116660035A discloses a material rolling contact fatigue testing machine, which realizes the rolling contact fatigue life test of bearing materials. However, the loading load is limited to the vertical downward pressure and cannot achieve bidirectional loading of the bearing; Chinese Patent CN 116296928A discloses a method for testing the rolling contact fatigue performance of GCr15 bearing steel used to manufacture high-speed ceramic hybrid bearings, but the test specimen is a bearing steel specimen rod, which is different from the actual working conditions of the bearing; Chinese Patent CN 214748866U discloses a rolling contact fatigue testing machine, which considers the influence of air flow and dust particles in the air on bearing testing, but the structure is relatively complex. The problems existing in the above devices are that in the process of rolling contact fatigue testing of bearing materials, the prior art all adopts single-direction load loading on the bearing materials, and the device structure is relatively complex. Summary of the Utility Model

[0004] In view of this, the purpose of the present utility model is to provide a rolling contact fatigue test device for bearing materials, which can perform bidirectional load loading on the upper and lower surfaces of the bearing material, can more realistically simulate the rolling contact fatigue situation of the bearing under actual working conditions, and provide a strong reference for the performance evaluation and optimization of the bearing material.

[0005] For the above purposes, the utility model provides a rolling contact fatigue test device for bearing materials, which includes an upper pressure cover, a plurality of upper rolling elements, a left fixing plate, a right fixing plate, a plurality of lower rolling elements, a lower pressure cover, an upper test head shaft, a test machine base, and a lower test head shaft. Among them: The upper pressure cover includes a first mounting surface and a second mounting surface arranged oppositely. The first mounting surface is mounted on the upper test head shaft, and a plurality of the upper rolling elements are all rotatably mounted on the second mounting surface. The upper test head shaft is used for driving connection with a first motor, and the upper test head shaft is vertically arranged to be liftable. A plurality of the upper rolling elements are used for rolling and fitting on the upper surface of the bearing specimen; The lower pressure cover includes a third mounting surface and a fourth mounting surface arranged oppositely. The third mounting surface is mounted on the lower test head shaft, and a plurality of the lower rolling elements are all rotatably mounted on the fourth mounting surface. The lower test head shaft is used for driving connection with a second motor, and the lower test head shaft is vertically arranged to be liftable. A plurality of the lower rolling elements are used for rolling and fitting on the lower surface of the bearing specimen; The left fixing plate and the right fixing plate are both mounted at two opposite ends of the test machine base. The left fixing plate is used for mounting on one side of the bearing specimen, and the right fixing plate is used for mounting on the other side of the bearing specimen. The left fixing plate and the right fixing plate are used for limiting and clamping the bearing specimen.

[0006] Optionally, it further includes an upper dust cover and a lower dust cover. The upper dust cover and the lower dust cover are both threadedly mounted on the test machine base. The upper dust cover is sleeved outside the upper test head shaft and has a gap with the upper test head shaft. The lower dust cover is sleeved outside the lower test head shaft and has a gap with the lower test head shaft.

[0007] Optionally, the first mounting surface and the lower end of the upper test head shaft are fixedly connected by a first pin shaft.

[0008] Optionally, the third mounting surface and the lower end of the lower test head shaft are fixedly connected by a second pin shaft.

[0009] Optionally, a plurality of first mounting grooves are formed on the second mounting surface, and a plurality of the upper rolling elements are rotatably mounted in the plurality of first mounting grooves in a one-to-one correspondence.

[0010] Optionally, a plurality of second mounting grooves are provided on the fourth mounting surface, and a plurality of the lower rolling elements are rotatably mounted in the plurality of second mounting grooves in a one-to-one correspondence.

[0011] Optionally, it further includes an upper bearing cage, on which a plurality of equally spaced first mounting through holes are provided. The upper rolling elements are cylindrical upper rolling elements, which are rotatably mounted in the first mounting grooves. The two end faces of the cylindrical upper rolling elements are abutted and mounted on the hole walls of the first mounting through holes, so that the cylindrical upper rolling elements are mounted in the first mounting holes, and the circumferential surfaces of the cylindrical upper rolling elements are attached to the upper surface of the bearing specimen.

[0012] Optionally, it further includes a lower bearing cage, on which a plurality of equally spaced second mounting through holes are provided. The lower rolling elements are cylindrical lower rolling elements, which are rotatably mounted in the second mounting grooves. The two end faces of the cylindrical lower rolling elements are abutted and mounted on the hole walls of the second mounting through holes, so that the cylindrical lower rolling elements are mounted in the second mounting holes, and the circumferential surfaces of the cylindrical lower rolling elements are attached to the lower surface of the bearing specimen.

[0013] The rolling contact fatigue test equipment for bearing materials provided by the present utility model includes an upper pressing cover, a plurality of upper rolling elements, a left fixing plate, a right fixing plate, a plurality of lower rolling elements, a lower pressing cover, an upper test head shaft, a testing machine base, and a lower test head shaft. First, the upper pressing cover is mounted on the upper test head shaft, the upper test head shaft is drivingly connected to a first motor, the lower pressing cover is mounted on the lower test head shaft, and the lower test head shaft is drivingly connected to a second motor. Then, a plurality of upper rolling elements are rotatably mounted on the upper pressing cover, and the plurality of upper rolling elements are used for rolling and attaching to the upper surface of the bearing specimen. A plurality of lower rolling elements are rotatably mounted on the lower pressing cover, and the plurality of lower rolling elements are used for rolling and attaching to the lower surface of the bearing specimen. Finally, the left fixing plate and the right fixing plate are used to limit and clamp the bearing specimen so that the bearing specimen remains fixed. For the rolling contact fatigue test equipment for bearing materials provided by the present utility model, when the first motor drives the upper test head shaft to apply different axial loads to the upper surface of the bearing specimen and the second motor drives the lower test head shaft to apply different axial loads to the lower surface of the bearing specimen, the working states of the bearing specimen under different loads are simulated. When the rotation speeds of the first motor and the second motor are respectively adjusted, and the rotation speeds of the upper test head shaft and the lower test head shaft are respectively adjusted, the working states of the upper and lower surfaces of the bearing specimen at different rotation speeds are simulated. Thus, bidirectional load loading on the upper and lower surfaces of the bearing material can be performed, and the rolling contact fatigue situation of the bearing under actual working conditions can be more realistically simulated, providing a strong reference for the performance evaluation and optimization of the bearing material. Description of the Drawings

[0014] The preferred embodiments of the present utility model will be described in detail below with reference to the drawings, which will help to understand the purpose and advantages of the present utility model, wherein:

[0015] Figure 1Schematic cross-sectional view structure diagram of a rolling contact fatigue test device for bearing materials according to an embodiment of the present utility model;

[0016] Figure 2 Installation schematic diagram among the upper pressure cover, upper rolling element, lower pressure cover, lower rolling element, and bearing specimen in a rolling contact fatigue test device for bearing materials according to an embodiment of the present utility model;

[0017] Figure 3 Schematic structure diagram of a rolling contact fatigue test device for bearing materials according to an embodiment of the present utility model;

[0018] Figure 4 Schematic structure diagram of the bearing specimen in a rolling contact fatigue test device for bearing materials according to an embodiment of the present utility model;

[0019] Figure 5 Installation schematic diagram between the upper rolling element and the upper bearing cage or between the lower rolling element and the lower bearing cage in a rolling contact fatigue test device for bearing materials according to an embodiment of the present utility model.

[0020] Explanation of reference numerals:

[0021] 1: Upper pressure cover; 2: Upper rolling element; 3: Left fixing plate; 4: Right fixing plate; 5: Lower rolling element; 6: Lower pressure cover; 7: Upper test head shaft; 8: Lower test head shaft; 9: Test machine base; 10: Upper dust cover; 11: Lower dust cover; 12: First pin shaft; 13: Second pin shaft; 14: Upper bearing cage; 15: Lower bearing cage; 16: Bearing specimen. Detailed implementation manners

[0022] The present utility model will be described in detail below in conjunction with embodiments. The same components are denoted by the same reference numerals. It should be noted that the terms "front", "rear", "left", "right", "upper", and "lower" used in the following description refer to the directions in the drawings, and the terms "inner" and "outer" refer to the directions towards or away from the geometric center of a specific component, respectively.

[0023] Such as Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown in the figure, the rolling contact fatigue test equipment for bearing materials provided by the present utility model includes an upper pressure cover 1, a plurality of upper rolling elements 2, a left fixing plate 3, a right fixing plate 4, a plurality of lower rolling elements 5, a lower pressure cover 6, an upper test head shaft 7, a testing machine base 9, and a lower test head shaft 8. Among them: The upper pressure cover 1 includes a first mounting surface and a second mounting surface arranged oppositely. The first mounting surface is mounted on the upper test head shaft 7, and a plurality of upper rolling elements 2 are all rotatably mounted on the second mounting surface. The upper test head shaft 7 is used to be drivingly connected to a first motor, and the upper test head shaft 7 is vertically liftable. A plurality of upper rolling elements 2 are used to rollingly fit on the upper surface of the bearing specimen 16; The lower pressure cover 6 includes a third mounting surface and a fourth mounting surface arranged oppositely. The third mounting surface is mounted on the lower test head shaft 8, and a plurality of lower rolling elements 5 are all rotatably mounted on the fourth mounting surface. The lower test head shaft 8 is used to be drivingly connected to a second motor, and the lower test head shaft 8 is vertically liftable. A plurality of lower rolling elements 5 are used to rollingly fit on the lower surface of the bearing specimen 16; The left fixing plate 3 and the right fixing plate 4 are both mounted at opposite ends of the testing machine base 9. The left fixing plate 3 is used to be mounted on one side of the bearing specimen 16, and the right fixing plate 4 is used to be mounted on the other side of the bearing specimen 16. The left fixing plate 3 and the right fixing plate 4 are used to limit and clamp the bearing specimen 16.

[0024] It should be noted that: A plurality of upper rolling elements 2 are partially rotatably mounted on the upper pressure cover 1, and the exposed part is rollingly fitted on the upper surface of the bearing specimen 16. Similarly, a plurality of lower rolling elements 5 are also partially rotatably mounted on the lower pressure cover 6, and the exposed part is rollingly fitted on the lower surface of the bearing specimen 16; The testing machine base 9 is fixed and immovable.

[0025] The rolling contact fatigue test equipment for bearing materials provided by the utility model includes an upper pressing cover 1, multiple upper rolling elements 2, a left fixing plate 3, a right fixing plate 4, multiple lower rolling elements 5, a lower pressing cover 6, an upper test head shaft 7, a testing machine base 9, and a lower test head shaft 8. First, the upper pressing cover 1 is installed on the upper test head shaft 7, the upper test head shaft 7 is drivingly connected to a first motor, the lower pressing cover 6 is installed on the lower test head shaft 8, and the lower test head shaft 8 is drivingly connected to a second motor. Then, multiple upper rolling elements 2 are rotatably installed on the upper pressing cover 1, and the multiple upper rolling elements 2 are used for rolling and fitting on the upper surface of the bearing specimen 16. Multiple lower rolling elements 5 are rotatably installed on the lower pressing cover 6, and the multiple lower rolling elements 5 are used for rolling and fitting on the lower surface of the bearing specimen 16. Finally, the left fixing plate 3 and the right fixing plate 4 are used to limit and clamp the bearing specimen 16 so that the bearing specimen 16 remains fixed. For the rolling contact fatigue test equipment for bearing materials provided by the utility model, when the first motor drives the upper test head shaft 7 to apply different axial loads to the upper surface of the bearing specimen 16 and the second motor drives the lower test head shaft 8 to apply different axial loads to the lower surface of the bearing specimen 16, the working state of the bearing specimen 16 under different loads is simulated. When the rotational speeds of the first motor and the second motor are adjusted respectively, and the rotational speeds of the upper test head shaft 7 and the lower test head shaft 8 are adjusted respectively, the working states of the upper and lower surfaces of the bearing specimen 16 at different rotational speeds are simulated. Thus, bidirectional load loading on the upper and lower surfaces of the bearing material can be carried out, and the rolling contact fatigue situation of the bearing under actual working conditions can be more realistically simulated, providing a strong reference for the performance evaluation and optimization of the bearing material.

[0026] As Figure 1 and Figure 3 shown, it further includes an upper dust cover 10 and a lower dust cover 11. The upper dust cover 10 and the lower dust cover 11 are both threadedly installed on the testing machine base 9. The upper dust cover 10 is sleeved outside the upper test head shaft 7 and has a gap with the upper test head shaft 7. The lower dust cover 11 is sleeved outside the lower test head shaft 8 and has a gap with the lower test head shaft 8. In this embodiment, the upper dust cover 10 and the lower dust cover 11 can play a role in dust prevention and protection, ensuring the convenience of use and the experimental reliability of the rolling contact fatigue test equipment for bearing materials.

[0027] As Figure 1 shown, the first mounting surface is fixedly connected to the lower end of the upper test head shaft 7 through a first pin shaft 12. In this embodiment, the pin shaft connection can facilitate the installation and disassembly between the upper test head shaft 7 and the upper pressing cover 1, improving the convenience of installation and disassembly of the rolling contact fatigue test equipment for bearing materials.

[0028] As Figure 1As shown, the third mounting surface is fixedly connected to the lower end of the lower test head shaft 8 through the second pin shaft 13. In this embodiment, the pin shaft connection facilitates the installation and disassembly between the lower test head shaft 8 and the lower pressing cover 6, improving the convenience of installation and disassembly of the bearing material rolling contact fatigue test equipment.

[0029] In an embodiment of the present utility model, a plurality of first mounting grooves are formed on the second mounting surface, and a plurality of upper rolling bodies 2 are respectively and rotatably mounted in the plurality of first mounting grooves. The upper rolling bodies 2 can roll stably in the upper pressing cover 1, improving the structural stability of the bearing material rolling contact fatigue test equipment.

[0030] In an embodiment of the present utility model, a plurality of second mounting grooves are provided on the fourth mounting surface, and a plurality of lower rolling bodies 5 are respectively and rotatably mounted in the plurality of second mounting grooves. The lower rolling bodies 5 can roll stably in the lower pressing cover 6, improving the structural stability of the bearing material rolling contact fatigue test equipment.

[0031] As Figure 2 shown, it further includes an upper bearing cage 14. A plurality of equally spaced first mounting through holes are formed on the upper bearing cage 14. The upper rolling body 2 is a cylindrical upper rolling body 2. The cylindrical upper rolling body 2 is rotatably mounted in the first mounting groove. The two end faces of the cylindrical upper rolling body 2 are abutted and mounted on the hole walls of the first mounting through holes, so that the cylindrical upper rolling body 2 is mounted in the first mounting hole. The circumferential surface of the cylindrical upper rolling body 2 is attached to the upper surface of the bearing specimen 16. In this embodiment, the upper bearing cage 14 can keep the plurality of upper rolling bodies 2 equidistant from each other, achieving the purpose of average load distribution. At the same time, it can also prevent the upper rolling bodies 2 from rubbing and colliding with each other during operation, improving the structural stability and use convenience of the bearing material rolling contact fatigue test equipment.

[0032] As Figure 5 shown, it further includes a lower bearing cage 15. A plurality of equally spaced second mounting through holes are formed on the lower bearing cage 15. The lower rolling body 5 is a cylindrical lower rolling body 5. The cylindrical lower rolling body 5 is rotatably mounted in the second mounting groove. The two end faces of the cylindrical lower rolling body 5 are abutted and mounted on the hole walls of the second mounting through holes, so that the cylindrical lower rolling body 5 is mounted in the second mounting hole. The circumferential surface of the cylindrical lower rolling body 5 is attached to the lower surface of the bearing specimen 16. In this embodiment, the lower bearing cage 15 can keep the plurality of lower rolling bodies 5 equidistant from each other, achieving the purpose of average load distribution. At the same time, it can also prevent the lower rolling bodies 5 from rubbing and colliding with each other during operation, improving the structural stability and use convenience of the bearing material rolling contact fatigue test equipment.

[0033] As Figure 4As shown, in an embodiment of the present utility model, the bearing specimen 16 is annular, with an inner diameter of 15 mm, an outer diameter of 26 mm, and a thickness of 6 mm.

[0034] The rolling contact fatigue test equipment for bearing materials provided by the present utility model includes an upper pressing cover 1, a plurality of upper rolling elements 2, a left fixing plate 3, a right fixing plate 4, a plurality of lower rolling elements 5, a lower pressing cover 6, an upper test head shaft 7, a testing machine base 9, and a lower test head shaft 8. First, the upper pressing cover 1 is installed on the upper test head shaft 7, the upper test head shaft 7 is drivingly connected to a first motor, the lower pressing cover 6 is installed on the lower test head shaft 8, and the lower test head shaft 8 is drivingly connected to a second motor. Then, a plurality of upper rolling elements 2 are rotatably installed on the upper pressing cover 1, and the plurality of upper rolling elements 2 are used to roll and fit on the upper surface of the bearing specimen 16. A plurality of lower rolling elements 5 are rotatably installed on the lower pressing cover 6, and the plurality of lower rolling elements 5 are used to roll and fit on the lower surface of the bearing specimen 16. Finally, the left fixing plate 3 and the right fixing plate 4 are used to limit and clamp the bearing specimen 16 to keep the bearing specimen 16 fixed. For the rolling contact fatigue test equipment for bearing materials provided by the present utility model, when the first motor drives the upper test head shaft 7 to apply different axial loads to the upper surface of the bearing specimen 16 and the second motor drives the lower test head shaft 8 to apply different axial loads to the lower surface of the bearing specimen 16, the working state of the bearing specimen 16 under different loads is simulated. When the rotational speeds of the first motor and the second motor are respectively adjusted, and the rotational speeds of the upper test head shaft 7 and the lower test head shaft 8 are respectively adjusted, the working states of the upper and lower surfaces of the bearing specimen 16 at different rotational speeds are simulated. Thus, bidirectional load loading on the upper and lower surfaces of the bearing material can be carried out, and the rolling contact fatigue situation of the bearing under actual working conditions can be more realistically simulated, providing a strong reference for the performance evaluation and optimization of the bearing material.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. However, such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present utility model.

Claims

1. A rolling contact fatigue test device for bearing materials, characterized in that It includes an upper gland, multiple upper rolling elements, a left fixing plate, a right fixing plate, multiple lower rolling elements, a lower gland, an upper test head shaft, a testing machine base, and a lower test head shaft, where: The upper gland includes a first mounting surface and a second mounting surface which are oppositely arranged. The first mounting surface is mounted on the upper test head shaft. Multiple upper rolling elements are all rotatably mounted on the second mounting surface. The upper test head shaft is used to be drivingly connected to a first motor. The upper test head shaft is vertically movable up and down. Multiple upper rolling elements are used to roll and fit on the upper surface of the bearing specimen. The lower gland includes a third mounting surface and a fourth mounting surface which are oppositely arranged. The third mounting surface is mounted on the lower test head shaft. Multiple lower rolling elements are all rotatably mounted on the fourth mounting surface. The lower test head shaft is used to be drivingly connected to a second motor. The lower test head shaft is vertically movable up and down. Multiple lower rolling elements are used to roll and fit on the lower surface of the bearing specimen. The left fixing plate and the right fixing plate are both mounted at two opposite ends of the testing machine base. The left fixing plate is used to be mounted on one side of the bearing specimen, and the right fixing plate is used to be mounted on the other side of the bearing specimen. The left fixing plate and the right fixing plate are used to limit and clamp the bearing specimen.

2. The rolling contact fatigue test equipment for bearing materials according to claim 1, wherein It further includes an upper dust cover and a lower dust cover. The upper dust cover and the lower dust cover are both threadedly mounted on the testing machine base. The upper dust cover is sleeved outside the upper test head shaft and has a gap with the upper test head shaft. The lower dust cover is sleeved outside the lower test head shaft and has a gap with the lower test head shaft.

3. The rolling contact fatigue test equipment for bearing materials according to claim 1, characterized in that, The first mounting surface and the lower end of the upper test head shaft are fixedly connected by a first pin shaft.

4. The rolling contact fatigue test equipment for bearing materials according to claim 1, wherein The third mounting surface and the lower end of the lower test head shaft are fixedly connected by a second pin shaft.

5. The rolling contact fatigue test equipment for bearing materials according to claim 1, characterized in that, Multiple first mounting grooves are formed on the second mounting surface. Multiple upper rolling elements are rotatably mounted in multiple first mounting grooves in a one-to-one correspondence.

6. The rolling contact fatigue test equipment for bearing materials according to claim 1, characterized in that, Multiple second mounting grooves are provided on the fourth mounting surface. Multiple lower rolling elements are rotatably mounted in multiple second mounting grooves in a one-to-one correspondence.

7. The rolling contact fatigue test equipment for bearing materials according to claim 5, characterized in that, It further includes an upper bearing cage. Multiple equally spaced first mounting through holes are formed on the upper bearing cage. The upper rolling element is a cylindrical upper rolling element. The cylindrical upper rolling element is rotatably mounted in the first mounting groove. The two end faces of the cylindrical upper rolling element are abutted and mounted on the hole walls of the first mounting through holes, so that the cylindrical upper rolling element is mounted in the first mounting hole. The circumferential surface of the cylindrical upper rolling element is in contact with the upper surface of the bearing specimen.

8. The rolling contact fatigue test equipment for bearing materials according to claim 5, characterized in that, It further includes a lower bearing cage, on which a plurality of second mounting through holes at equal intervals are formed. The lower rolling elements are cylindrical lower rolling elements, which are rollably mounted in the second mounting grooves. Both end faces of the cylindrical lower rolling elements are abutted and mounted on the hole walls of the second mounting through holes, so that the cylindrical lower rolling elements are mounted in the second mounting holes, and the circumferential surfaces of the cylindrical lower rolling elements are attached to the lower surface of the bearing specimen.

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