Bearing testing module and bearing testing device

Abstract

The utility model provides a bearing test module, which is used for testing paired bearings arranged face to face, and comprises a bearing seat provided with a first flange interacting with an outer ring of a first bearing; and the cover plate is detachably connected to the bearing seat, and the cover plate is provided with a second flange which interacts with the outer ring of the second bearing. The utility model also provides a bearing testing device which comprises a first bearing testing module and a second bearing testing module which are arranged in a shell, and each of the first bearing testing module and the second bearing testing module is the above bearing testing module. Through the bearing testing module and the bearing testing device, uniform and stable axial force loading of the tested bearing can be realized through a modularized structure, and axial fastening of the bearing testing module is realized through a simple structural design. In combination with the adjustment of the pre-tightening force of the bearing by the bearing test module, the precise simulation and control of the axial force and the pre-tightening force of the actual working condition load can be realized.

Description

TECHNICAL FIELD

[0001] The utility model provides a bearing test module and a bearing test device. BACKGROUND

[0002] Bearings are widely used in various equipment and instruments. Among various bearings, some bearings need to be arranged in pairs, such as angular contact bearings or tapered roller bearings. In some cases, such bearings need to be arranged in a so-called "face-to-face" manner and rotate at high speed under a relatively large axial force, and sometimes even need to be accelerated or decelerated sharply. Therefore, such complex working conditions put higher requirements on the performance and reliability of bearings.

[0003] For bearing manufacturers, if the bearings can be simulated and tested under actual working conditions after the design or manufacture of the bearings is completed, such as testing the temperature, vibration, damage, etc. of the bearings under different axial forces, different rotating speeds, and different acceleration and deceleration conditions, it can provide a favorable basis for subsequent product improvement and quality control.

[0004] However, there is currently no means for simulating the working conditions of such bearings. SUMMARY

[0005] To solve the above problems and meet the needs mentioned above, the present disclosure proposes a novel technical solution, which solves the above problems and brings other technical effects due to the adoption of the following technical features.

[0006] The utility model provides a bearing test module for testing the pair of bearings arranged face-to-face, comprising: a bearing seat having a first flange acting on the outer ring of a first bearing in the pair of bearings; a cover plate detachably connected to the bearing seat to form a space between the bearing seat and the cover plate for accommodating the pair of bearings to be tested, and the cover plate has a second flange acting on the outer ring of a second bearing in the pair of bearings.

[0007] Preferably, a first elastic component is arranged between the first flange and the outer ring of the first bearing; and / or a second elastic component is arranged between the second flange and the outer ring of the second bearing.

[0008] Preferably, the first elastic component and / or the second elastic component is a disc spring; preferably, the cover plate is detachably connected to the bearing seat through an adjusting screw, so that the pre-tightening force applied to the pair of bearings through the bearing seat, the cover plate and the disc spring can be adjusted via the adjusting screw.

[0009] Preferably, the bearing test module further comprises: a first temperature sensor for measuring the temperature of the outer ring of the first bearing, preferably the bearing seat comprises a first through hole extending from its outer surface to the outer ring of the first bearing, and the first temperature sensor is arranged in the first through hole and directly contacts the outer ring of the first bearing; and / or a second temperature sensor for measuring the temperature of the outer ring of the second bearing, preferably the bearing seat comprises a second through hole extending from its outer surface to the outer ring of the second bearing, and the second temperature sensor is arranged in the second through hole and directly contacts the outer ring of the second bearing; and / or a vibration sensor arranged on the bearing seat.

[0010] Preferably, a lubricant flow channel is arranged in the bearing seat, which delivers lubricant into the gap between the outer ring of the first bearing and the outer ring of the second bearing; preferably the lubricant flow channel comprises a first branch and a second branch, and the lubricant outlet of the first branch and the lubricant outlet of the second branch are symmetrically arranged relative to the rotation center of the pair of bearings in the radial direction.

[0011] Preferably, the inner diameter of the first flange is smaller than the inner diameter of the outer ring shoulder of the first bearing; and / or the inner diameter of the second flange is smaller than the inner diameter of the outer ring shoulder of the second bearing.

[0012] The utility model also provides a kind of bearing test device, comprising: shell, first bearing test module and second bearing test module are arranged in the shell, the first bearing test module and second bearing test module each are the bearing test module as described above, the cover plate of the first bearing test module and the cover plate of the second bearing test module face each other;Pivot, the pair of bearings to be tested in the first bearing test module and the second bearing test module are arranged on the pivot;Loading assembly, for the bearing seat of the first bearing test module is applied axial force;Wherein, the shell includes stop portion, and the stop portion abuts against the bearing seat of the second bearing test module.

[0013] Preferably, the loading assembly comprises a loading block and a first loading plate, the loading block applies an axial force to the first loading plate along the rotation axis of the pivot, and the first loading plate abuts against the bearing seat of the first bearing test module to uniformly transmit the axial force from the loading block to the bearing seat of the first bearing test module;Or the loading assembly comprises one or more loading blocks, and the one or more loading blocks directly apply an axial force along the rotation axis of the pivot to the bearing seat of the first bearing test module.

[0014] Preferably, the bearing test device further comprises a drive shaft, and the axial end thereof is connected to the pivot on the side opposite to the loading assembly to drive the pivot to rotate.

[0015] Preferably, the stopper is a second loading plate arranged between the inner wall of the housing and the bearing seat of the second bearing test module; or the stopper is an inner wall of the housing or a protrusion extending from the inner wall; and / or the housing comprises a lubricant outlet arranged at the bottom thereof and corresponding to the middle position between the first bearing test module and the second bearing test module.

[0016] The bearing test module and the bearing test device according to the utility model can realize uniform and stable axial force loading on the bearing under test in a modular structure, and axial fastening of the bearing test module is realized through simple structure design. Meanwhile, in combination with the adjustment of the pre-tightening force of the bearing test module as described above, accurate simulation and control of the axial force and the pre-tightening force for actual working condition load can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Fig. 4 is a perspective view of the bearing test module and the bearing test device according to the preferred embodiment of the utility model, which also shows a partial enlarged view.

[0018] Figure 2 Fig. 5 is a plan view of the bearing test module and the bearing test device according to the preferred embodiment of the utility model;

[0019] Figure 3 and Figure 4 Fig. 6 shows the lubricant flow channel of the bearing test module according to the preferred embodiment of the utility model in plan view and perspective view respectively;

[0020] Figure 5 is an enlarged view of the dashed box portion of Figure 2 Fig. 7;

[0021] Figure 6 Fig. 8 is a schematic view for explaining the force transmission of the bearing test device according to the preferred embodiment of the utility model. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the technical scheme of the present disclosure clearer, the technical scheme of the embodiments of the present disclosure will be described clearly and completely in the following with reference to the drawings of the embodiments of the present disclosure. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present disclosure.

[0023] Compared with the embodiments shown in the drawings, the feasible implementation solutions within the protection scope of the present disclosure can have fewer components, have other components not shown in the drawings, have different components, have differently arranged components, or have differently connected components, etc. In addition, two or more components in the drawings can be implemented in a single component, or a single component shown in the drawings can be implemented as a plurality of separate components.

[0024] Unless otherwise defined, technical terms or scientific terms used herein should have the ordinary meanings as understood by those skilled in the art to which the present disclosure pertains. The terms "first", "second", and similar terms used in the description and the claims of the present patent application do not necessarily mean any order, number, or importance, but are only used to distinguish different components. When the number of components is not specified, the number of components can be one or more; similarly, the terms "one", "the", "said", and the like do not necessarily mean a quantity limitation. The terms "comprise", "contain", and the like mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "mount", "set", "connect", or "connected" and the like do not necessarily mean physical or mechanical mounting, setting, or connection, but can include electrical mounting, setting, or connection, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like are only used to represent the relative positional relationship of the device in use or the positional relationship shown in the drawings, and when the absolute position of the described object changes, the relative positional relationship can also change accordingly.

[0025] For the convenience of description, the direction of the rotation axis of the bearing / rotating shaft is referred to as the axial direction, the direction perpendicular to the axial direction is referred to as the radial direction, and the rotation direction of the bearing / rotating shaft is referred to as the circumferential direction.

[0026] The utility model is described below with reference to the drawings.

[0027] The utility model discloses a bearing test module for the "face-to-face" configuration of a pair of bearings (for example, angular contact ball bearings or tapered roller bearings) and further discloses a bearing test device using the bearing test module to perform actual working condition simulation testing. This test is usually performed to simulate actual working conditions, such as simulating certain axial loads, various rotational speeds, even severe acceleration or deceleration, etc., and obtaining performance parameters such as the temperature and vibration of the bearing, evaluating the risk of bearing damage, etc., to provide multi-dimensional data support and physical characterization of the test bearing for bearing analysis.

[0028] As Figures 1-2As shown, two bearing test modules 100, 200 according to a preferred embodiment of the present application have been assembled in a bearing test device. These two bearing test modules have the same configuration, each of which comprises a bearing seat 1 and a cover plate 2. Specifically, the cover plate 2 is detachably connected to the bearing seat 1 (e.g. connected together by screws), so as to form a space between the bearing seat 1 and the cover plate 2 for accommodating a pair of bearings to be tested. In addition, the bearing seat 1 has a first flange 11 acting on an outer ring 31 of a first bearing of the pair of bearings, and the cover plate 2 has a second flange 21 acting on an outer ring 32 of a second bearing of the pair of bearings. It should be understood that "acting on" here means that the flanges 11, 12 have a force interaction relationship with the outer rings 31, 32, i.e. they can act on each other in a direct contact manner or have intermediate transmission components therebetween.

[0029] With such a bearing test module, the pair of bearings to be tested arranged face to face can be stably arranged in the module to form a relatively independent unit that can be tested in various ways. At present, there is no such bearing test module in the prior art, so that the pair of bearings arranged face to face cannot be tested reliably and stably, and thus valuable test data cannot be obtained. The bearing test module of the present application solves this problem. Moreover, since the cover plate and the bearing seat are detachably mounted, they can be properly adjusted to accommodate bearings of different sizes and specifications. In addition, in the bearing test module of the present application, the bearing seat and the cover plate "clamp" the pair of bearings therebetween, so that the play of the pair of bearings can also be adjusted to better simulate the actual working conditions of the bearings.

[0030] Further preferably, referring to Figure 2 A first elastic component 41 can be arranged between the first flange 11 of the bearing seat 1 and the outer ring 31 of the first bearing. Similarly, a second elastic component 42 can also be arranged between the second flange 21 of the cover plate 2 and the outer ring 32 of the second bearing. By arranging the first elastic component 41 and / or the second elastic component 42, an adjustable pre-tightening force can be applied to the bearings to achieve accurate control and adjustment of the play of the bearings, thereby meeting the needs of various working condition simulation tests. It should be understood that the above-mentioned elastic components can be any suitable spring or the like. According to a more preferred embodiment, the first elastic component 41 and / or the second elastic component 42 can be a disc spring, for example, so that a larger pre-tightening force adjustment can be achieved in a relatively narrow space.

[0031] Further preferably, the cover plate 2 is detachably connected to the bearing seat 1 by adjustment screws 20, so that the pre-tightening force applied to the pair of bearings by the bearing seat 1, the cover plate 2 and the disc spring can be adjusted via the adjustment screws 20. In a preferred embodiment according to the present application, four adjustment screws 20 can be arranged at uniform intervals in the circumferential direction (as shown in the figure).Figure 3 a cross-sectional view of the bearing test module (as shown in FIG. 1).

[0032] In addition, the bearing test module according to the preferred embodiment of the present application can integrate suitable detection devices. For example, in a preferred embodiment, the bearing test module can include a first temperature sensor 51 for measuring the temperature of the outer ring 31 of the first bearing, as shown in FIG. 2. It should be understood that the first temperature sensor 51 can directly or indirectly measure the temperature of the outer ring 31 of the first bearing. For example, referring to FIGS. 3 and 4, the bearing housing 1 can include a first through hole 13 extending from its outer surface to the outer ring 31 of the first bearing, and the first temperature sensor 51 can be disposed in the first through hole 13 and directly contact the outer ring 31 of the first bearing. This direct contact temperature measurement method can obtain more accurate outer ring temperature data. Figure 2 Figure 1 Figure 2

[0033] Similarly, the bearing test module can include a second temperature sensor 52 for measuring the temperature of the outer ring 32 of the second bearing. Preferably, the bearing housing 1 can include a second through hole 14 extending from its outer surface to the outer ring 32 of the second bearing, and the second temperature sensor 52 can be disposed in the second through hole 14 and directly contact the outer ring 32 of the second bearing.

[0034] Of course, according to the principle of the present application, other temperature measurement means can also be used, for example, an infrared temperature sensor can be disposed at a suitable position in the first through hole 13 and the second through hole 14 or at the opening thereof, to measure the temperature in a non-contact manner.

[0035] On the other hand, vibration during the operation of the bearing is also an important indicator for evaluating the performance of the bearing. Therefore, the bearing test module according to the preferred embodiment of the present application can further include a vibration sensor 6 disposed on the bearing housing 1, as shown in FIG. 5. The vibration sensor 6 is preferably disposed on the outer surface of the bearing housing 1 and directly opposite the bearing. Figure 2

[0036] The bearing usually needs to be lubricated during actual use, and different lubrication conditions also affect the operation performance of the bearing. Therefore, in order to more realistically simulate the actual working condition of the bearing, the bearing test module of the present application further integrates a bearing lubrication structure. The inner rings of the pair of bearings arranged face to face are in close contact with each other, while there is a certain gap between the outer rings. Therefore, the present application fully utilizes this feature of the pair of bearings arranged face to face to design the bearing lubrication structure.

[0037] Specifically, Figure 3 a cross-sectional view taken along the inner ring abutting surface of the pair of bearings is shown in FIG. 6, Figure 4 ​​​​A perspective view thereof is shown. The bearing test module can comprise a lubricant flow channel arranged in the bearing seat 1, which can deliver lubricant into the gap between the outer ring 31 of the first bearing and the outer ring 32 of the second bearing, so that the lubricant entering the gap through the lubricant flow channel can flow into each of the pair of bearings without having to arrange a separate lubricant flow channel for each bearing. It should be understood that the lubricant flow channel can be arranged at any position of the bearing seat 1 as appropriate as long as it can deliver lubricant into the gap between the outer ring 31 of the first bearing and the outer ring 32 of the second bearing.

[0038] Further preferably, the lubricant flow channel can comprise a first branch 71 and a second branch 72, as shown in Figure 3 and 4 The lubricant outlet of the first branch 71 and the lubricant outlet of the second branch 72 are arranged symmetrically relative to the rotation center O of the pair of bearings in the radial direction. With this structure, lubricant can be delivered symmetrically on both sides of the pair of bearings to achieve more uniform and efficient bearing lubricant supply. Moreover, the inlets of the two branches of the lubricant flow channel can be connected to the same lubricant supply source outside the bearing test module, further reducing structural complexity.

[0039] Further, although lubricant can be continuously supplied to the pair of bearings, in order to maintain sufficient lubricant in the pair of bearings, the utility model also proposes to introduce a lubricant retention structure in the bearing test module. Specifically, referring to Figure 5 (which is an enlarged view of the dashed box part of Figure 2 ), the inner diameter of the first flange 11 of the bearing seat 1 can be set to be smaller than the inner diameter of the outer ring shoulder 311 of the first bearing, so that the first flange 11 can play a certain blocking role for the lubricant inside the bearing, and even in the case of lubricant supply cut-off, there is still a certain amount of lubricant inside the bearing, avoiding damage to the bearing due to lack of lubricant. Similarly, although not shown, the inner diameter of the second flange 21 of the cover plate 2 can also be set to be smaller than the inner diameter of the outer ring shoulder of the second bearing.

[0040] The utility model also provides a bearing test device. Specifically, referring to Figure 1 and Figure 6The bearing testing device comprises a housing 8, a rotating shaft 90 and a loading assembly. A first bearing testing module 100 and a second bearing testing module 200 are arranged in the housing 8, and each of the first bearing testing module 100 and the second bearing testing module 200 is a bearing testing module as described above. Moreover, a cover plate of the first bearing testing module 100 and a cover plate of the second bearing testing module 200 face each other. A pair of bearings to be tested in the first bearing testing module 100 and the second bearing testing module 200 are arranged on the rotating shaft 90. The loading assembly is used to apply an axial force to the bearing seat of the first bearing testing module 100. The housing 8 further comprises a stop portion 80 which abuts against the bearing seat of the second bearing testing module 200.

[0041] It should be understood that the stop portion 80 can be a second loading plate as shown, which is arranged between the inner wall of the housing 8 and the bearing seat of the second bearing testing module 200; or, in a preferred embodiment not shown, the stop portion 80 can be an inner wall of the housing 8 or a protrusion extending from the inner wall, as long as it can abut against the bearing seat of the second bearing testing module 200.

[0042] The loading assembly preferably comprises a loading block 91 and a first loading plate 92. The loading block is connected to an external force applying mechanism, for example, and applies an axial force to the first loading plate 92 along the rotation axis of the rotating shaft 90, and in turn, the first loading plate 92 abuts against the bearing seat of the first bearing testing module 100, so that the axial force from the loading block 91 is uniformly transmitted to the bearing seat of the first bearing testing module 100.

[0043] According to the concept of the present application, other embodiments of the loading assembly can be conceived, for example, the first loading plate 92 can be integrated with the bearing seat of the first bearing testing module 100 as one component, and correspondingly, the loading assembly can only comprise the loading block 91 as described above, or can comprise a plurality of loading blocks which apply a circumferential load to the integrated bearing seat at a plurality of circumferential positions (this embodiment is not shown), as long as the loading component directly applies an axial force along the rotation axis of the rotating shaft 90 to such integrated bearing seat of the first bearing testing module 100.

[0044] The axial force loading of the bearing testing device according to the present application will be described below with reference to Figure 6

[0045] ​Firstly, as shown by the solid arrow at the loading block 91, the loading block 91 applies an axial force to the first loading plate 92; subsequently, as shown by the subsequent series of hollow arrows, the first loading plate 92 uniformly transmits the axial force to the bearing seat of the first bearing test module 100, which in turn transmits the axial force via the bearing outer ring, rolling elements, bearing inner ring in the first bearing test module 100 to the shaft 90, and then the axial force is transmitted via the shaft 90 to the bearing inner ring, rolling elements, bearing outer ring in the second bearing test module 200, and then to the bearing seat thereof; since the bearing seat of the second bearing test module 200 abuts against the stop portion 80, the bearing seat of the second bearing test module 200 will receive a counterforce from the stop portion 80, as shown by the solid arrow at the stop portion 80.

[0046] Therefore, by the above structure of the bearing test device, the uniform and stable axial force loading of the bearing under test can be achieved in a modularized configuration, and the axial fastening of the bearing test module is also achieved by a simple structure design. Meanwhile, in combination with the adjustment of the pre-tightening force of the bearing by the bearing test module as described above, the accurate simulation and control of the axial force and the pre-tightening force for the actual working condition load can be achieved.

[0047] Further preferably, the bearing test device can further comprise a driving shaft 99, the axial end of which is connected with the shaft 90 on the side opposite to the loading assembly, and the other end of the driving shaft 99 can be connected to an external power source, such as a rotary motor, to receive a rotary torque. In the preferred embodiment shown in the drawings, the second loading plate 80 is an annular plate with a middle hole, and the driving shaft 99 can pass through the second loading plate 80 to be connected with the shaft 90. In addition, the driving shaft 99 and the shaft 90 can be rotatably connected with each other in any suitable manner. For example, the axial end of the driving shaft 99 comprises a square protrusion, and correspondingly, the corresponding end of the shaft 90 comprises a square groove, and after the two are engaged, the rotary torque can be transmitted from the driving shaft 99 to the shaft 90. Of course, it should be understood that the bearing test device can also not comprise the driving shaft 99, but for example, the output shaft of the rotary motor can be directly connected to the shaft 90.

[0048] In addition, as described above, each bearing test module can comprise a lubricant flow channel, and the utility model further proposes a structure capable of realizing the circulating flow of lubricant. To this end, the housing 8 can further comprise a lubricant outlet 81 arranged at the bottom thereof and corresponding to the middle position between the first bearing test module 100 and the second bearing test module 200, as shown in Figure 6 .

[0049] The bearing test module and the bearing test device are described above with reference to the drawings of preferred embodiments of the present application. With the understanding of the principle of the present application, those skilled in the art can connect multiple bearing test devices as described above in series, flexibly set the bearing running program, realize the rotating movement of the bearing in multiple working conditions, and do not interfere with the application of axial force, overcoming the difficulty of simultaneously testing multiple bearings at different high speeds and acceleration / deceleration. This simulation test can provide rich data support for subsequent performance analysis of the bearing, help to deeply understand the physical properties of the bearing, and provide strong support for the development and optimization of the bearing

[0050] Specifically, multiple bearing test devices can be arranged in a row along the axial direction, the first bearing test device can receive the axial force from the external force applying mechanism, and the rotating shaft of the first bearing test device can be connected with a force transmission member (which can also transmit the rotating torque) to continue transmitting the axial force to the second bearing test device; in this way, the axial force can be transmitted to multiple subsequent bearing test devices. The rotating shaft of the last bearing test device can be connected with the driving shaft to receive the rotating torque of the external rotating motor, for example, so as to realize the rotating drive of the rotating shaft in all bearing test devices.

[0051] The exemplary embodiments of the present disclosure are described in detail above with reference to preferred embodiments, however, those skilled in the art can understand that various modifications and changes can be made to the above specific embodiments without departing from the concept of the present disclosure, and various technical features and structures proposed in the present disclosure can be combined without exceeding the protection scope of the present disclosure, and the protection scope of the present disclosure is determined by the appended claims.

Claims

1. A bearing test module for testing a pair of bearings in a face-to-face configuration, the bearing test module comprising: comprising: a bearing seat (1) having a first flange (11) acting on an outer ring (31) of a first bearing of said pair of bearings; a cover plate (2) removably connected to the bearing seat (1) so as to form a space between the bearing seat (1) and the cover plate (2) for accommodating the pair of bearings to be tested, and said cover plate (2) having a second flange (21) acting on an outer ring (32) of a second bearing of said pair of bearings.

2. The bearing test module according to claim 1, wherein: a first elastic member (41) is provided between said first flange (11) and the outer ring (31) of said first bearing; and / or a second elastic member (42) is provided between said second flange (21) and the outer ring (32) of said second bearing.

3. The bearing test module of claim 2, wherein, said first elastic member (41) and / or said second elastic member (42) is a disc spring; preferably, said cover plate (2) is removably connected to the bearing seat (1) by means of an adjusting screw (20) so as to be able to adjust the pre-tightening force exerted on said pair of bearings by means of the bearing seat (1), the cover plate (2) and the disc spring via said adjusting screw.

4. The bearing test module of any of claims 1-3, wherein, further comprising: a first temperature sensor (51) for measuring the temperature of the outer ring (31) of said first bearing, preferably said bearing seat (1) comprises a first through hole (13) extending from its outer surface to the outer ring (31) of said first bearing, and the first temperature sensor (51) is arranged in the first through hole (13) and directly contacts the outer ring (31) of said first bearing; and / or a second temperature sensor (52) for measuring the temperature of the outer ring (32) of said second bearing, preferably said bearing seat (1) comprises a second through hole (14) extending from its outer surface to the outer ring (32) of said second bearing, and the second temperature sensor (52) is arranged in the second through hole (14) and directly contacts the outer ring (32) of said second bearing; and / or a vibration sensor (6) arranged on the bearing seat (1).

5. The bearing test module of any of claims 1-3, wherein, a lubricant flow channel is provided in the bearing seat (1) for delivering lubricant into a gap between the outer ring (31) of said first bearing and the outer ring (32) of said second bearing; preferably, said lubricant flow channel comprises a first branch (71) and a second branch (72), and the lubricant outlet of said first branch (71) and the lubricant outlet of said second branch (72) are symmetrically arranged in a radial direction with respect to the center of rotation of said pair of bearings.

6. The bearing test module according to claim 5, wherein: the inner diameter of said first flange (11) is smaller than the inner diameter of a shoulder (311) of the outer ring of said first bearing; and / or the inner diameter of said second flange (21) is smaller than the inner diameter of a shoulder of the outer ring of said second bearing.

7. A bearing testing apparatus characterized by, comprising: a housing (8) in which a first bearing test module (100) and a second bearing test module (200) are arranged, each of the first bearing test module (100) and the second bearing test module (200) being a bearing test module as claimed in any one of claims 1 to 6, the cover plate of the first bearing test module (100) and the cover plate of the second bearing test module (200) facing each other; a rotating shaft (90) on which a pair of bearings to be tested in the first bearing test module (100) and the second bearing test module (200) are arranged; a loading assembly for applying an axial force to the bearing seat of the first bearing test module (100); wherein the housing (8) comprises a stop portion (80) abutting against the bearing seat of the second bearing test module (200).

8. The bearing test device according to claim 7, wherein the loading assembly comprises a loading block (91) and a first loading plate (92), the loading block applying an axial force to the first loading plate (92) along the rotation axis of the rotating shaft (90), the first loading plate (92) abutting against the bearing seat of the first bearing test module (100) to uniformly transmit the axial force from the loading block (91) to the bearing seat of the first bearing test module (100); or the loading assembly comprises one or more loading blocks directly applying an axial force along the rotation axis of the rotating shaft (90) to the bearing seat of the first bearing test module (100).

9. The bearing test device according to claim 8, wherein the bearing test device further comprises a driving shaft (99) connected to the rotating shaft (90) at an axial end thereof on a side opposite to the loading assembly to drive the rotating shaft (90) to rotate.

10. The bearing test device according to claim 9, wherein the stop portion (80) is a second loading plate arranged between an inner wall of the housing (8) and the bearing seat of the second bearing test module (200); or the stop portion (80) is an inner wall of the housing (8) or a protrusion extending from the inner wall; and / or the housing (8) comprises a lubricant outlet arranged at a bottom thereof and corresponding to a middle position between the first bearing test module (100) and the second bearing test module (200).

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