Bearing axial loading test device

Abstract

A bearing axial loading test device comprises a driving motor, an accompanying test bearing seat, an auxiliary bearing seat and an axial loading mechanism which are sequentially arranged from left to right. According to the utility model, the steps of the stepped shaft are adopted to position and place the bearing to be tested, the position precision and the dismounting efficiency of the bearing to be tested are improved, and the steps with different diameters are utilized to place the bearings to be tested with different models, so that the test range of the bearing axial loading test device is expanded; the one-way stepped shaft and the two-way stepped shaft form a clamped beam structure by using the accompanying test bearing seat and the auxiliary bearing seat, so that the stability of the stepped shafts under high-speed rotation is improved, the influence of high-speed rotation on the axial load of the to-be-tested bearing is avoided, and the test precision is improved; the separable roller bearing is adopted to reduce the resistance of the stepped shaft during axial movement, the placement cavity is defined by the accompanying test shaft and the auxiliary bearing to store lubricating oil, the lubricating oil is utilized to reduce the resistance of the bearing during relative movement of the inner ring and the outer ring, and the precision of the axial load output to the bearing to be tested is improved.

Description

Technical Field

[0001] The utility model relates to the field of mechanical environment testing, in particular to a bearing axial loading testing device. Background Art

[0002] As a key component of high-speed trains, the performance and reliability of bearings directly affect the safety and operating efficiency of the trains. To ensure the safety of the trains, accurate performance testing and evaluation of the bearings are required.

[0003] However, due to the large number of bearing types on high-speed trains, disassembly and positioning during testing and evaluation are difficult, resulting in poor consistency in test results. At the same time, in order to simulate the actual operating environment of the bearing to be tested during the test, the bearing needs to be kept in a high-speed rotation state. Traditional axial loading test devices will produce certain interference with the axial loading device when in a high-speed motion state, affecting the accuracy of the test results.

[0004] Therefore, in view of the shortcomings of the existing technology, it is necessary to design a bearing axial loading test device to solve the above problems.

[0005] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solution of the present invention and facilitating the understanding of those skilled in the art. It cannot be assumed that the above contents are well known to those skilled in the art simply because they are explained in the background technology of the present invention. Utility Model Content

[0006] In order to overcome the above-mentioned deficiencies in the prior art, the present invention aims to disclose a bearing axial load test device, which is used to solve the problems of difficulty in disassembly and assembly of test bearings and the impact of high-speed rotation on axial load.

[0007] The utility model discloses a bearing axial loading test device, comprising a driving motor, a test bearing seat, an auxiliary bearing seat and an axial loading mechanism which are arranged in sequence from left to right, a test bearing and a one-way stepped shaft with a diameter which decreases step by step from left to right are provided in the test bearing seat, the left end of the one-way stepped shaft is transmission-connected to the output shaft of the driving motor, the inner ring of the test bearing is fixed at the step of the one-way stepped shaft by a first locking nut, the auxiliary bearing seat is provided with an auxiliary bearing and a bidirectional stepped shaft with a diameter which decreases step by step from the middle to both ends, the right end of the bidirectional stepped shaft is connected to the loading end of the axial loading mechanism, the inner ring of the auxiliary bearing is fixed at the right step of the bidirectional stepped shaft by a second locking nut, the left step of the bidirectional stepped shaft is used to fix the bearing to be tested, the right end of the one-way stepped shaft and the left end of the bidirectional stepped shaft are rigidly connected by a tightening sleeve, so that the one-way stepped shaft and the bidirectional stepped shaft form a fixed beam structure, thereby improving their impact resistance and thus improving the stability of the test bearing, and the test bearing and the auxiliary bearing adopt separable roller bearings.

[0008] The preferred technical solution is as follows: a first pressure cover is provided on the one-way stepped shaft at both ends of the companion test bearing, the first pressure cover is detachably connected to the companion test bearing seat and encloses a first placement cavity, and the companion test bearing is arranged in the first placement cavity and is detachably connected through the outer ring; a second pressure cover is provided on the two-way stepped shaft at both ends of the auxiliary bearing, the second pressure cover is detachably connected to the auxiliary bearing seat and encloses a second placement cavity, and the auxiliary bearing is arranged in the second placement cavity and is detachably connected through the outer ring, making disassembly and assembly more convenient.

[0009] Optimal technical solution: A first high-speed oil seal is also provided on the one-way stepped shaft at both ends of the test bearing, and the first high-speed oil seal is located in the connecting gap between the one-way stepped shaft and the first pressure cover; a second high-speed oil seal is also provided on the two-way stepped shaft at both ends of the auxiliary bearing, and the second high-speed oil seal is located in the connecting gap between the two-way stepped shaft and the second pressure cover, so that a large amount of lubricating oil can be stored in the placement cavity, thereby reducing the resistance encountered by the test bearing and the auxiliary bearing during axial movement, thereby improving the test accuracy.

[0010] The preferred technical solution is: the number of the test bearings is two, and the two test bearings are spaced apart by a spacer ring to eliminate the radial load generated during the transmission process of the drive motor and improve the wear resistance of the test bearings.

[0011] Preferred technical solution: The number of steps at both ends of the bidirectional stepped shaft is greater than or equal to two, which is used to facilitate the placement of bearings to be tested of different models.

[0012] Preferred technical solution: The left end of the one-way stepped shaft is connected to the output shaft of the drive motor through a bellows coupling to avoid periodic vibration due to the height difference between the output shaft of the drive motor and the one-way stepped shaft, thereby reducing the impact on the fault signal of the bearing to be tested.

[0013] Preferred technical solution: The loading end of the axial loading mechanism is a spherical surface, and the spherical surface is connected to the right end of the bidirectional stepped shaft through point contact, which reduces the difficulty of installation and prevents the loading end of the axial loading mechanism from bearing the rotational force caused by the high-speed rotation of the stepped shaft.

[0014] Due to the application of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0015] The utility model discloses a bearing axial loading test device, which adopts the steps of a stepped shaft to position and place the bearing to be tested, thereby improving the position accuracy and disassembly efficiency of the bearing to be tested, and adopts steps of different diameters to place bearings to be tested of different models, thereby improving the test range of the bearing axial loading test device; utilizes a test bearing seat and an auxiliary bearing seat to form a fixed beam structure between the one-way stepped shaft and the two-way stepped shaft, thereby improving the stability of the stepped shaft under high-speed rotation, avoiding the influence of high-speed rotation on the axial load of the bearing to be tested, and improving the test accuracy; utilizes a separable roller bearing to reduce the resistance of the stepped shaft during axial movement, and stores lubricating oil in a placement cavity enclosed by the test shaft and the auxiliary bearing, thereby utilizing the lubricating oil to further reduce the resistance during relative movement between the inner ring and the outer ring of the bearing, thereby improving the accuracy of the axial load output to the bearing to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a structural diagram of a bearing axial loading test device according to the present invention;

[0018] Figure 2 This is a structural diagram of the test bearing seat in the utility model;

[0019] Figure 3 It is a structural schematic diagram of the auxiliary bearing seat in the utility model.

[0020] In the above drawings, 1. drive motor; 2. test bearing seat; 21. test bearing; 22. one-way stepped shaft; 23. first locking nut; 24. first pressure cover; 25. first placement cavity; 26. first high-speed oil seal; 27. spacer; 3. auxiliary bearing seat; 31. auxiliary bearing; 32. two-way stepped shaft; 33. second locking nut; 34. second pressure cover; 35. second placement cavity; 36. second high-speed oil seal; 4. axial loading mechanism; 5. expansion sleeve; 6. bearing to be tested. DETAILED DESCRIPTION

[0021] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate to describe the embodiments of the present application here. In addition, the terms "including" and "having" and their synonyms are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0023] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe the present invention and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0024] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0025] Furthermore, the terms "installed," "disposed," "provided with," "connected," "connected," "sleeved," and "fitted" should be interpreted broadly. For example, "connected" can mean a fixed connection, a removable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or internal communication between two devices, elements, or components. For another example, "fitted" can mean complete or partial contact. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0026] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] Example 1:

[0028] like Figure 1As shown, the utility model discloses a bearing axial loading test device, which includes a driving motor 1, a test bearing seat 2, an auxiliary bearing seat 3 and an axial loading mechanism 4 arranged from left to right. The main components of the utility model are described in detail below:

[0029] like Figure 1 and Figure 2 As shown, a test bearing 21 and a one-way stepped shaft 22 with a diameter that decreases step by step from left to right are provided in the test bearing seat 2. The inner ring of the test bearing 21 is fixed to the step of the one-way stepped shaft 22 by a first locking nut 23. The test bearing 21 is a separable roller bearing.

[0030] like Figure 1 and Figure 2 As shown, the output shaft of the drive motor 1 is drivingly connected to the left end of the one-way stepped shaft 22 .

[0031] like Figure 1 and Figure 3 As shown, the auxiliary bearing seat 3 is provided with an auxiliary bearing 31 and a bidirectional stepped shaft 32 whose diameter decreases step by step from the middle to both ends.

[0032] like Figure 1 、 Figure 2 and Figure 3 As shown, the right end of the bidirectional stepped shaft 32 is connected to the loading end of the axial loading mechanism 4, the inner ring of the auxiliary bearing 31 is fixed to the right step of the bidirectional stepped shaft 32 by a second locking nut 33, and the left step of the bidirectional stepped shaft 32 is used to fix the bearing to be tested 6. The left end of the bidirectional stepped shaft 32 is rigidly connected to the right end of the unidirectional stepped shaft 22 through a clamping sleeve 5, and the auxiliary bearing 31 is a separable roller bearing.

[0033] refer to Figure 1 、 Figure 2 and Figure 3 As shown, the usage method and principle of the utility model are as follows: a fixed beam structure is formed by a one-way stepped shaft 22 and a two-way stepped shaft 32, and the high impact resistance of the fixed beam structure is used to maintain the movement stability of the bearing to be tested 6 thereon; the left step of the two-way stepped shaft 32 is used to fix the bearing to be tested 6, and during the test, the load is input from the right side of the fixed beam structure and directly transmitted to the inner ring of the bearing to be tested 6 through the left step of the two-way stepped shaft 32, and in this process, the inner and outer rings of the test bearing 21 and the auxiliary bearing 31 slide against each other, avoiding interference with the axial load transmission, thereby improving the test accuracy of the axial loading test of the bearing to be tested 6.

[0034] Example 2:

[0035] like Figure 1 、 Figure 2 and Figure 3As shown, in order to reduce the transmission loss of axial load, a first pressure cover 24 is provided on the one-way stepped shaft 22 at both ends of the test bearing 21, and the first pressure cover 24 is detachably connected to the test bearing seat 2 and encloses a first placement cavity 25. The test bearing 21 is arranged in the first placement cavity 25 and is detachably connected through the outer ring; a second pressure cover 34 is provided on the two-way stepped shaft 32 at both ends of the auxiliary bearing 31, and the second pressure cover 34 is detachably connected to the auxiliary bearing seat 3 and encloses a second placement cavity 35. The auxiliary bearing 31 is arranged in the second placement cavity 35 and is detachably connected through the outer ring. Placement cavities are provided at the test bearing 21 and the auxiliary bearing 31, and the placement cavities are used to lubricate the test bearing 21 and the auxiliary bearing 31 in lubricating oil, thereby reducing the resistance when the inner and outer rings move relative to each other, thereby reducing the transmission loss of axial load.

[0036] Example 3:

[0037] like Figure 1 、 Figure 2 and Figure 3 As shown, in order to avoid leakage of lubricating oil, a first high-speed oil seal 26 is also provided on the one-way stepped shaft 22 at both ends of the test bearing 21, and the first high-speed oil seal 26 is located in the connecting gap between the one-way stepped shaft 22 and the first pressure cover 24; a second high-speed oil seal 36 is also provided on the two-way stepped shaft 32 at both ends of the auxiliary bearing 31, and the second high-speed oil seal 36 is located in the connecting gap between the two-way stepped shaft 32 and the second pressure cover 34 to prevent lubricating oil from leaking from the gap, thereby reducing the consumption of lubricating oil.

[0038] Example 4:

[0039] like Figure 1 、 Figure 2 and Figure 3 As shown, in order to reduce the radial vibration during transmission between the drive motor and the one-way stepped shaft, the number of the accompanying test bearings 21 is two, and the two accompanying test bearings 21 are spaced apart by a spacer ring 27 to circumferentially restrict the one-way stepped shaft 22 and improve the movement stability of the one-way stepped shaft 22.

[0040] Embodiment 5:

[0041] like Figure 1 、 Figure 2 and Figure 3 As shown, in order to facilitate rapid testing of different types of bearings to be tested, the number of steps at both ends of the bidirectional stepped shaft 32 is two. By setting steps of different diameters on the bidirectional stepped shaft 32, different types of bearings to be tested can be quickly positioned and installed to improve testing efficiency.

[0042] Example 6:

[0043] like Figure 1 、 Figure 2 and Figure 3 As shown, in order to further reduce the vibration impact of the drive motor on the one-way stepped shaft, the left end of the one-way stepped shaft 22 is connected to the output shaft of the drive motor 1 through a bellows coupling 11, so as to avoid periodic vibration between the output shaft of the drive motor and the one-way stepped shaft due to the height difference, thereby reducing the impact on the fault signal of the bearing to be tested.

[0044] Embodiment seven:

[0045] like Figure 1 、 Figure 2 and Figure 3 As shown, in order to further improve the test accuracy, the loading end of the axial loading mechanism 4 is a spherical surface, and the spherical surface is connected to the right end of the bidirectional stepped shaft 32 through point contact, which reduces the difficulty of installation and prevents the loading end of the axial loading mechanism 4 from being subjected to the rotational force caused by the high-speed rotation of the stepped shaft.

[0046] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bearing axial loading test device, comprising a driving motor (1), a test bearing seat (2), an auxiliary bearing seat (3) and an axial loading mechanism (4) arranged in sequence from left to right, characterized in that: The accompanying test bearing seat (2) is provided with an accompanying test bearing (21) and a one-way stepped shaft (22) whose diameter decreases step by step from left to right. The left end of the one-way stepped shaft (22) is connected to the output shaft of the drive motor (1). The inner ring of the accompanying test bearing (21) is fixed to the step of the one-way stepped shaft (22) by a first locking nut (23). The auxiliary bearing seat (3) is provided with an auxiliary bearing (31) and a bidirectional stepped shaft (32) whose diameter decreases step by step from the middle to both ends. The right end of the axial loading mechanism (32) is connected to the loading end of the axial loading mechanism (4), the inner ring of the auxiliary bearing (31) is fixed to the right step of the bidirectional stepped shaft (32) through a second locking nut (33), the left step of the bidirectional stepped shaft (32) is used to fix the bearing to be tested, the right end of the unidirectional stepped shaft (22) and the left end of the bidirectional stepped shaft (32) are rigidly connected through a locking sleeve (5), and the accompanying test bearing (21) and the auxiliary bearing (31) adopt separable roller bearings.

2. A bearing axial load testing device according to claim 1, characterized in that: A first pressure cap (24) is sleeved on the one-way stepped shaft (22) at both ends of the companion bearing (21), the first pressure cap (24) is detachably connected to the companion bearing seat (2) and encloses a first placement cavity (25), and the companion bearing (21) is arranged in the first placement cavity (25) and is detachably connected through the outer ring; a second pressure cap (34) is sleeved on the two-way stepped shaft (32) at both ends of the auxiliary bearing (31), the second pressure cap (34) is detachably connected to the auxiliary bearing seat (3) and encloses a second placement cavity (35), and the auxiliary bearing (31) is arranged in the second placement cavity (35) and is detachably connected through the outer ring.

3. A bearing axial load testing device according to claim 2, characterized in that: A first high-speed oil seal (26) is further provided on the one-way stepped shaft (22) at both ends of the companion bearing (21), and the first high-speed oil seal (26) is located in the connection gap between the one-way stepped shaft (22) and the first pressure cover (24); a second high-speed oil seal (36) is further provided on the two-way stepped shaft (32) at both ends of the auxiliary bearing (31), and the second high-speed oil seal (36) is located in the connection gap between the two-way stepped shaft (32) and the second pressure cover (34).

4. A bearing axial load testing device according to claim 3, characterized in that: The number of the accompanying test bearings (21) is two, and the two accompanying test bearings (21) are spaced apart by a spacer ring (27).

5. The bearing axial load testing device according to claim 1, characterized in that: The number of steps at both ends of the bidirectional stepped shaft (32) is greater than or equal to two.

6. The bearing axial load testing device according to claim 1, characterized in that: The left end of the one-way stepped shaft (22) is connected to the output shaft of the drive motor (1) via a bellows coupling (11).

7. The bearing axial load testing device according to claim 1, characterized in that: The loading end of the axial loading mechanism (4) is a spherical surface, and the spherical surface is connected to the right end of the bidirectional stepped shaft (32) through point contact.

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