Driving bearing performance evaluation device

Abstract

The utility model relates to the technical field of bearings, in particular to a driving bearing performance evaluation device. The driving bearing performance evaluation device comprises a bearing platform, a driving shaft, a telescopic mechanism, a pressing head and a sound receiver. During application, the to-be-tested bearing to be tested is sleeved on the driving shaft, and the driving shaft has power so as to drive the inner ring of the to-be-tested bearing to rotate. One or more telescopic mechanisms surrounding the driving shaft are operated to control the telescopic component to stretch out and draw back, so that the pressing head gradually approaches the outer ring of the to-be-detected bearing and abuts against the outer ring of the to-be-detected bearing, and the inner ring and the outer ring of the to-be-detected bearing rotate relatively. And the rotation state of the to-be-tested bearing is recorded through the sound receiver, so that rotation sound data of the to-be-tested bearing are obtained, and the performance, related to rotation sound, of the to-be-tested bearing is evaluated and analyzed. The plurality of sound receivers can collect rotation sound at different positions of the to-be-tested bearing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bearings, in particular to a driving bearing performance evaluation device. BACKGROUND

[0002] In the field of driving bearing performance evaluation, traditional detection methods mainly rely on vibration signal analysis, temperature monitoring or lubrication state detection and other technical means. However, with the development of driving bearings towards high speed, integration and intelligence (such as new energy vehicle driving motors, high-density servo joints and other scenarios), their operating conditions are becoming increasingly complex, and the traditional detection methods gradually expose the following limitations:

[0003] Contact sensing limitations: vibration sensors need to be directly installed on bearing seats, which is difficult to deploy on narrow spaces or rotating parts, and is easily disturbed by mechanical structure transmission paths;

[0004] Fault characterization lag: temperature monitoring is slow to respond to early minor damage (such as micro-pitting, cage deformation), making it difficult to achieve fault warning;

[0005] Multi-physical field coupling interference: electromagnetic noise, fluid noise and bearing abnormal noise are mixed in high-power density drive systems, resulting in a decrease in the analysis accuracy of a single signal source.

[0006] In recent years, acoustic detection technology has attracted attention due to its non-contact and full-life-cycle advantages. Existing research (such as patent CN112985626A) shows that bearing abnormal noise is strongly related to internal defects (raceway spalling, rolling element out-of-roundness, etc.). Therefore, how to collect the rotating sound of the driving bearing is a technical problem to be solved in the field. CONTENT OF THE INVENTION

[0007] Therefore, the present application provides a driving bearing performance evaluation device, which can collect the rotating sound of each part of the driving bearing when rotating, for evaluating and analyzing the performance of the to-be-tested bearing related to the rotating sound.

[0008] In a first aspect, the application provides a bearing performance evaluation device, comprising: a bearing platform; a drive shaft arranged on the bearing platform, the drive shaft being arranged in a vertical direction and perpendicular to a platform surface of the bearing platform, and a bearing to be tested being sleeved on the drive shaft; a telescopic mechanism comprising a telescopic component, the telescopic mechanism being used to drive the telescopic component to perform telescopic movement along the platform surface of the bearing platform, the telescopic mechanism being in a plurality in number, and the plurality of telescopic mechanisms being arranged on the platform surface of the bearing platform around the drive shaft; a pressing head connected to each telescopic component one by one, the pressing head being used to press against an outer ring of the bearing to be tested; and a sound receiver arranged on the bearing platform, the sound receiver being in a plurality in number, and each sound receiver being located between the pressing head and the drive shaft.

[0009] With reference to the first aspect, in a possible implementation manner, the telescopic mechanism comprises: a screw rod seat and a screw rod, the length direction of the screw rod being parallel to the platform surface of the bearing platform, and the screw rod seat being configured to drive the screw rod to perform telescopic movement along the platform surface of the bearing platform.

[0010] With reference to the first aspect, in a possible implementation manner, the plurality of telescopic mechanisms are uniformly arranged around the drive shaft, and the plurality of sound receivers are uniformly arranged around the drive shaft.

[0011] With reference to the first aspect, in a possible implementation manner, the pressing head is provided with a rubber head towards an end of the drive shaft.

[0012] With reference to the first aspect, in a possible implementation manner, the device further comprises: a variable-diameter ring sleeved on the drive shaft, the bearing to be tested being sleeved on the variable-diameter ring, a connecting notch being arranged on an inner ring of the variable-diameter ring, a connecting protrusion being arranged on an outer surface of the drive shaft, and the connecting notch and the connecting protrusion being matched and connected.

[0013] With reference to the first aspect, in a possible implementation manner, an outer ring surface of the variable-diameter ring is provided with a rubber layer.

[0014] With reference to the first aspect, in a possible implementation manner, the sound receiver adopts a directional microphone, a sound receiving direction of the sound receiver being vertically upward, and the sound receiver being located below the bearing to be tested.

[0015] With reference to the first aspect, in a possible implementation manner, a body of the sound receiver is embeddedly arranged in the bearing platform, and a sound receiving opening of the sound receiver being lower than the platform surface of the bearing platform.

[0016] In a possible implementation of the first aspect, the device further comprises a limiting sleeve, which is sleeved on the driving shaft, and the limiting sleeve has a limiting boss, and a top surface of the limiting boss faces upward, and the bearing to be tested is located above the top surface of the limiting boss.

[0017] In application, the bearing to be tested is sleeved on the driving shaft, and the driving shaft has power to drive the inner ring of the bearing to rotate. The telescopic mechanism around the driving shaft is controlled to make the telescopic part extend or retract, so that the pressing head gradually approaches the outer ring of the bearing to be tested and presses against the outer ring of the bearing to be tested, and then the inner ring and the outer ring of the bearing to be tested rotate relative to each other. The rotation state of the bearing to be tested is recorded by the microphone, so as to obtain the rotation sound data of the bearing to be tested, and the performance of the bearing to be tested related to the rotation sound is evaluated and analyzed. A plurality of microphones can collect the rotation sound at different positions of the bearing to be tested. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The structure of the driving bearing performance evaluation device provided by an embodiment of the application is shown.

[0019] Figure 2 The structure of the telescopic mechanism and the pressing head is shown.

[0020] Figure 3 The top view of the driving shaft and the variable-diameter ring is shown.

[0021] Figure 4 The structure of the bearing to be tested installed on the driving shaft is shown.

[0022] Figure 5 The partial structure side view provided by an embodiment is shown. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the application will be described clearly and completely in the following with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, but not all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0024] The exemplary driving bearing performance evaluation device is as follows:

[0025] Figure 1 The structure of the driving bearing performance evaluation device provided by an embodiment of the application is shown. Figure 4 The structure of the bearing to be tested installed on the driving shaft is shown. The application provides a driving bearing performance evaluation device, in an embodiment, as shown in Figure 1 and 4As shown, the drive bearing performance evaluation device includes: a support platform 1, a drive shaft 2, a telescopic mechanism 3, a pressing head 4, and a microphone 5. The drive shaft 2 is mounted on the support platform 1, vertically aligned and perpendicular to the platform surface. The drive bearing to be tested is selected as the bearing under test 10, and is fitted onto the drive shaft 2. The telescopic mechanism 3 includes a telescopic component 301, which drives the telescopic component 301 to extend and retract along the platform surface of the support platform 1. Multiple telescopic mechanisms 3 are arranged around the drive shaft 2 on the platform surface of the support platform 1. The pressing head 4 is connected one-to-one with each telescopic component 301 and presses against the outer ring of the bearing under test 10. Multiple microphones 5 are mounted on the support platform 1, each located between the pressing head 4 and the drive shaft 2.

[0026] In this embodiment, the bearing to be tested 10 is mounted on a drive shaft 2. The drive shaft 2 has power to rotate the inner ring of the bearing 10. One or more telescopic mechanisms 3 surrounding the drive shaft 2 control the telescopic component 301 to extend and retract, causing the pressing head 4 to gradually approach and press against the outer ring of the bearing 10, thereby causing the inner and outer rings of the bearing 10 to rotate relative to each other. A microphone 5 records the rotational state of the bearing 10, obtaining rotational sound data for evaluating and analyzing the performance of the bearing 10 related to the rotational sound. Multiple microphones 5 can collect rotational sounds from different positions of the bearing 10.

[0027] Multiple pressure heads 4 can press against different positions on the outer ring of the bearing 10 under test. At this time, the force on the bearing 10 under test is uneven, thus enabling the collection of rotational sound at the pressing positions. When all pressure heads 4 are pressed against the outer ring of the bearing 10 under test, the force on the bearing 10 under test is balanced, and the rotational sound at each position of the bearing 10 under test can be collected.

[0028] Figure 2 This is a schematic diagram of the telescopic mechanism and the pressure head. In one embodiment, as shown... Figure 2As shown, the telescopic mechanism 3 includes a screw rod base 302 and a screw rod 303, that is, the telescopic mechanism 3 adopts a common screw rod telescopic device on the market, the length direction of the screw rod 303 is parallel to the platform surface of the bearing platform 1, and the screw rod base 302 is configured to drive the screw rod 303 to perform telescopic movement along the platform surface of the bearing platform 1. When the screw rod 303 is operated to rotate, the screw rod 303 telescopes relative to the screw rod base 302, thereby driving the abutting head 4 to travel along the platform surface. The ways of operating the screw rod 303 to rotate include: 1, directly twisting the screw rod 303; 2, providing a rotating piece 304 with threads in the screw rod base 302, the threads of the rotating piece 304 are engaged with the threads of the screw rod 303, and when the rotating piece 304 is operated to rotate, the screw rod 303 can be driven to travel.

[0029] In an embodiment, as shown in Figure 1 , the plurality of telescopic mechanisms 3 are uniformly arranged around the drive shaft 2, and the plurality of sound receivers 5 are uniformly arranged around the drive shaft 2.

[0030] In an embodiment, as shown in Figure 2 , the abutting head 4 is provided with a rubber head 401 at the end thereof facing the drive shaft 2, the rubber head 401 has a certain friction and elasticity, can effectively abut against the outer ring of the bearing under test 10, so that the inner ring and the outer ring of the bearing under test 10 relatively rotate, and the outer ring of the bearing under test 10 is not damaged.

[0031] Figure 3 is a top view of the drive shaft and the variable-diameter ring. In an embodiment, as shown in Figure 3 , 4 , 5, the drive bearing performance evaluation device further includes a variable-diameter ring 6, the variable-diameter ring 6 is sleeved on the drive shaft 2, the bearing under test 10 is sleeved on the variable-diameter ring 6, the inner ring of the variable-diameter ring 6 is provided with a connecting gap 601, the outer surface of the drive shaft 2 is provided with a connecting protrusion 201, and the connecting gap 601 and the connecting protrusion 201 are matched and connected. The mutual cooperation of the connecting gap 601 and the connecting protrusion 201 enables the variable-diameter ring 6 to be fixed on the drive shaft 2, and the variable-diameter ring 6 can enable the drive shaft 2 to be able to assemble bearings under test 10 of various models and sizes.

[0032] In some embodiments, the outer ring surface of the variable-diameter ring 6 is provided with a rubber layer, the rubber layer is in contact with the inner ring of the bearing under test 10, and the bearing under test 10 can be more tightly sleeved on the variable-diameter ring 6.

[0033] Specifically, the sound receiver 5 adopts a directional microphone, the sound receiving direction of the sound receiver 5 is vertically upward, the sound receiver 5 is located below the bearing under test 10, can accurately sound upward, so as to more accurately collect the rotating sound of the part of the bearing under test 10 located above the sound receiver 5, thereby more accurately evaluating the bearing performance of each part of the bearing under test 10 related to the rotating sound.

[0034] In an embodiment, the body of the sound collector 5 is embedded in the bearing platform 1, and the sound collecting port of the sound collector 5 is below the platform surface of the bearing platform 1, which can further improve the sound collecting directivity of the sound collector 5, so that the sound collecting range of the sound collector 5 is more concentrated.

[0035] Figure 5 Part of the structure side view is provided for an embodiment, in which the bearing platform 1, the limiting sleeve ring 7, the variable diameter ring 6, and the bearing to be tested 10 are cut open. In an embodiment, as shown in Figure 5 The driving bearing performance evaluation device further comprises a limiting sleeve ring 7, which is sleeved on the driving shaft 2, and the limiting sleeve ring 7 has a limiting boss 701, the top surface of the limiting boss 701 faces upward, and the bearing to be tested 10 is located above the top surface of the limiting boss 701. The limiting boss 701 of the limiting sleeve ring 7 can support the bearing to be tested 10 from below, so as to avoid the position of the bearing to be tested 10 from moving downward on the driving shaft 2.

[0036] In an embodiment, as shown in Figure 5 The motor 8 for driving the driving shaft 2 to rotate is arranged in the bearing platform 1.

[0037] The above describes the basic principles of the present application in combination with specific embodiments, but it should be pointed out that the advantages, advantages, effects and the like mentioned in the present application are only examples and not limitations, and these advantages, advantages, effects and the like cannot be considered as the must-have of each embodiment of the present application. In addition, the above-mentioned specific details are only for the purpose of example and for the purpose of understanding, and are not limited to the present application, and the above-mentioned specific details are not limited to the present application.

[0038] The block diagram of the device, apparatus, equipment, system involved in the present application is only an illustrative example and is not intended to require or imply that the connection, arrangement, configuration must be as shown in the block diagram. As those skilled in the art will recognize, these devices, apparatus, equipment, system can be connected, arranged, configured in any way. Words such as "include", "contain", "have" and the like are open-ended words, which mean "include but not limited to", and can be used interchangeably. The words "or" and "and" used herein mean the word "and / or", and can be used interchangeably unless the context clearly indicates otherwise. The word "such as" used herein means the phrase "such as but not limited to", and can be used interchangeably.

[0039] It should also be noted that in the device, equipment and method of the present application, each component or each step can be decomposed and / or recombined. These decompositions and / or recombination should be considered as equivalent solutions of the present application.

[0040] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0041] The preferred embodiments of the application are described above in detail for the purposes of clarity and understanding. It should be appreciated that the application is not limited to the embodiments described, but is instead intended to cover any and all modifications and equivalents within the scope of the following claims.

Claims

1. A drive bearing performance evaluation device characterized by comprising: The utility model relates to a bearing performance evaluation device, including: A bearing platform (1); A drive shaft (2) is arranged on the bearing platform (1), the drive shaft (2) is arranged along the vertical direction and is perpendicular to the platform surface of the bearing platform (1), and a bearing (10) to be measured is sleeved on the drive shaft (2); A telescopic mechanism (3) includes a telescopic component (301), the telescopic mechanism (3) is used to drive the telescopic component (301) to carry out telescopic motion along the platform surface of the bearing platform (1), the number of the telescopic mechanism (3) is multiple, and multiple telescopic mechanisms (3) are arranged on the platform surface of the bearing platform (1) around the drive shaft (2); A pressing head (4) is connected on each telescopic component (301) one by one, and the pressing head (4) is used to press on the outer ring of the bearing (10) to be measured;And A sound receiver (5) is arranged on the bearing platform (1), and the number of the sound receiver (5) is multiple, and each sound receiver (5) is located between the pressing head (4) and the drive shaft (2).

2. The drive bearing performance evaluation device of claim 1, wherein The telescopic mechanism (3) includes: A screw rod base (302) and a screw rod (303), the length direction of the screw rod (303) is parallel to the platform surface of the bearing platform (1), and the screw rod base (302) is configured to drive the screw rod (303) to carry out telescopic motion along the platform surface of the bearing platform (1).

3. The bearing performance evaluation device according to claim 1, wherein Multiple telescopic mechanisms (3) are uniformly arranged around the drive shaft (2), and multiple sound receivers (5) are uniformly arranged around the drive shaft (2).

4. The drive bearing performance evaluation apparatus according to claim 1, wherein The pressing head (4) is provided with a rubber head (401) towards the end of the drive shaft (2).

5. The drive bearing performance evaluation apparatus of claim 1, wherein Further comprising: A variable-diameter ring (6) is sleeved on the drive shaft (2), the bearing (10) to be measured is sleeved on the variable-diameter ring (6), a connecting notch (601) is arranged on the inner ring of the variable-diameter ring (6), a connecting protrusion (201) is arranged on the outer surface of the drive shaft (2), and the connecting notch (601) and the connecting protrusion (201) are matched and connected.

6. The drive bearing performance evaluation apparatus according to claim 5, wherein A rubber layer is arranged on the outer ring surface of the variable-diameter ring (6).

7. The apparatus of claim 1, wherein The sound receiver (5) adopts a directional microphone, the sound receiving direction of the sound receiver (5) is vertically upward, and the sound receiver (5) is located below the bearing (10) to be measured.

8. The drive bearing performance evaluation apparatus according to claim 7, wherein The body of the sound receiver (5) is embeddedly arranged in the bearing platform (1), and the sound receiving opening of the sound receiver (5) is lower than the platform surface of the bearing platform (1).

9. The drive bearing performance evaluation apparatus of claim 1, wherein Further comprising: A limiting sleeve ring (7) is sleeved on the drive shaft (2), the limiting sleeve ring (7) has a limiting boss (701), the mesa of the limiting boss (701) faces upward, and the bearing (10) to be measured is located above the mesa of the limiting boss (701).

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