CN215811633U - Bearing unit vibration testing device - Google Patents
Bearing unit vibration testing device Download PDFInfo
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- CN215811633U CN215811633U CN202121928928.8U CN202121928928U CN215811633U CN 215811633 U CN215811633 U CN 215811633U CN 202121928928 U CN202121928928 U CN 202121928928U CN 215811633 U CN215811633 U CN 215811633U
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- inner ring
- bearing unit
- vibration
- outer ring
- vacuum box
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Abstract
The utility model relates to a bearing unit vibration testing device, comprising: the vacuum box is internally provided with an inner ring support shaft and an outer ring support frame; one of the inner ring support shaft and the outer ring support frame is a fixed part, the other one is a rotating part, the fixed part and the vacuum box are relatively fixedly assembled, and the rotating part and the vacuum box are relatively rotatably assembled; the motor rotor drives the rotating part to rotate, the inner ring or the outer ring fixedly assembled with the rotating part drives the rolling body of the bearing unit to rotate, and then the rolling body applies vibration force to the outer ring or the inner ring fixedly assembled with the fixing part; and the vibration sensor is fixedly arranged on the fixing piece and used for detecting the vibration condition of the outer ring or the inner ring fixedly assembled with the fixing piece. The vacuum box is utilized to form a vacuum working environment, and the vibration sensor is directly or indirectly and directly fixed and assembled on the fixing piece, so that the vibration performance of the bearing unit in the vacuum environment can be accurately measured.
Description
Technical Field
The utility model relates to a bearing unit vibration testing device.
Background
To obtain an inertia actuating mechanism of a spacecraft attitude control system with long service life and high performance, one of the key technologies is to obtain a bearing unit rotation support system with low friction wear and reliable operation. The bearing unit of the spacecraft inertia actuating mechanism adopts disposable thin oil lubrication and is free of maintenance throughout the life, and the performance of the spacecraft inertia actuating mechanism can be reduced due to tiny defects, and the task failure of the spacecraft can be caused in serious cases.
For the bearing unit, the vibration can effectively reflect the comprehensive characteristics of the running of the bearing unit, and is very sensitive to the early tiny defects of the bearing unit, so that under the condition that the bearing unit is not disassembled and does not shut down, relevant information parameters can be known through vibration testing, the running state of the bearing unit can be known and mastered, whether the whole or part of the bearing unit is normal or not is determined, and the early defects are found.
The utility model discloses a bearing finished product vibration detection device in chinese utility model patent that the publication number is CN21274308U, it includes that the bearing places a section of thick bamboo for place the bearing that awaits measuring, place a section of thick bamboo the place ahead at the bearing and set up and detect the boss, detect the boss and be used for stretching into the bearing inner circle, during the use, motor drive bearing places a section of thick bamboo and bearing gyration, detect the boss and insert the bearing inner circle, the vibration that the bearing produced is detected by the pressure sensor who detects the boss bottom and be equipped with, the realization is to the detection of bearing vibration.
The existing vibration detection device for the bearing mostly adopts the structure, and the structure has a problem that the vibration measurement is mostly directly completed in the atmospheric environment. For the inertia execution structure of the spacecraft, the working place is usually in a vacuum environment, and the vibration test result completed in the atmospheric environment has more deviation, which is not beneficial to accurately judging the performance of the bearing unit in the inertia execution structure.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a bearing unit vibration testing device to solve the technical problem that in the prior art, most bearing vibration testing devices directly complete vibration measurement in an atmospheric environment, so that the performance of a bearing unit in a vacuum environment cannot be accurately reflected.
In order to achieve the purpose, the technical scheme of the vibration testing device for the bearing unit provided by the utility model is as follows: a bearing unit vibration testing apparatus comprising:
the vacuum box is internally provided with an inner ring support shaft and an outer ring support frame;
the inner ring support shaft is used for fixedly assembling an inner ring of the bearing unit to be detected;
the outer ring support frame is used for fixedly assembling the outer ring of the detection unit to be detected;
one of the inner ring support shaft and the outer ring support frame is a fixed part, the other one is a rotating part, the fixed part and the vacuum box are relatively fixedly assembled, and the rotating part and the vacuum box are relatively rotatably assembled;
the motor rotor and the motor stator which are matched for use are arranged in the vacuum box, the motor rotor and the rotating part are fixedly assembled to drive the rotating part to rotate, the inner ring or the outer ring fixedly assembled with the rotating part drives the rolling body of the bearing unit to rotate, and then the rolling body applies vibration force to the outer ring or the inner ring fixedly assembled with the fixing part;
and the vibration sensor is directly fixedly arranged on the fixing piece or indirectly fixedly arranged on the fixing piece through a rigid connecting piece and is used for detecting the vibration condition of the outer ring or the inner ring fixedly assembled with the fixing piece.
The beneficial effects are that: in the bearing unit vibration testing device provided by the utility model, a vacuum environment is formed by utilizing the vacuum box, the inner ring of the bearing unit to be tested and the inner ring supporting shaft are fixedly assembled, the outer ring of the bearing unit to be tested and the outer ring supporting frame are fixedly assembled, wherein, the inner ring supporting shaft or the outer ring supporting frame is a rotating part, when in use, the motor rotor drives the rotating part to rotate, the inner ring or the outer ring which is fixedly assembled with the rotating part drives the rolling body of the bearing unit to rotate, and then the rolling body applies vibration force to the outer ring or the inner ring fixedly assembled with the fixed part, and the vibration sensor detects the vibration performance of the fixed part, thereby not only forming a vacuum working environment by using the vacuum box, moreover, the vibration sensor is directly or indirectly and fixedly assembled on the fixing piece, so that the vibration condition of the corresponding outer ring or inner ring fixedly assembled on the fixing piece can be accurately reflected, and the vibration performance of the bearing unit in a vacuum environment can be accurately measured.
As a further improvement, the axis of the inner ring support shaft extends in the up-down direction.
As a further improvement, when the inner ring support shaft serves as the mount and the vibration sensor is indirectly mounted on the mount through a rigid coupling, the rigid coupling is mounted on the top of the inner ring support shaft.
The beneficial effects are that: the rigid connecting piece is arranged at the top of the inner ring supporting shaft, and the installation and the detection are convenient.
As a further improvement, the rigid connecting piece is a threaded connecting piece, the lower end of the threaded connecting piece is fixedly assembled with the inner ring supporting shaft through a threaded connecting structure, and the upper end of the threaded connecting piece is fixedly assembled with the vibration sensor through the threaded connecting structure.
The beneficial effects are that: the rigid connecting piece adopts a threaded connecting piece, so that the vibration sensor is conveniently and rigidly and fixedly arranged on the inner ring supporting shaft.
As a further improvement, the lower end of the threaded connecting piece is provided with a bottom threaded column to be in threaded connection with an internal threaded hole at the top end of the inner ring supporting shaft, and the upper end of the threaded connecting piece is provided with a top threaded hole for the threaded fastening assembly of the vibration sensor.
The beneficial effects are that: the fastening assembly of the vibration sensor and the inner ring support shaft is conveniently realized.
As a further improvement, the motor rotor is coaxially sleeved outside the inner ring supporting shaft at intervals, a motor stator is relatively and fixedly assembled in the vacuum box, the motor stator is matched with the motor rotor to ensure the motor rotor to normally rotate, the motor stator is in an annular interval, and the motor stator is coaxially sleeved outside the inner ring supporting shaft at intervals.
As a further improvement, the vacuum box is supported and installed on a vibration isolation platform.
The beneficial effects are that: the vibration isolation platform is arranged, so that the interference of the external environment on the vacuum box is conveniently reduced, and the measurement precision is ensured.
As a further improvement, the vacuum box comprises a support bottom plate and an opening box body which is arranged in an inverted buckle mode, the support bottom plate and the opening box body are assembled in a sealing mode, and a vacuumizing structure is arranged on the support bottom plate.
As a further improvement, an electric connector unit is arranged on the supporting bottom plate in a centralized mode, a signal line and a power supply line are connected to the electric connector unit, the power supply line supplies power to the motor stator to drive the motor rotor to rotate, and the signal line is connected with the vibration sensor.
The beneficial effects are that: the electric connector units are arranged on the bottom plate in a centralized mode and used for configuring signal lines and power supply lines, power supply and signal connection are conveniently achieved, and leakage risks caused by too many openings are avoided.
As a further improvement, the vibration sensor is a three-axis type vibration sensor.
Drawings
FIG. 1 is a schematic structural diagram of a vibration testing apparatus for a bearing unit according to the present invention;
fig. 2 is a schematic structural view of the rigid connection member of fig. 1.
Description of reference numerals:
1. a rigid connection; 101. a bottom threaded post; 102. a top threaded hole; 2. a vacuum box; 3. a rotor fastening screw; 31. an outer ring support frame; 4. a stator fastening screw; 5. a seal ring; 6. a vacuum valve; 7. a vibration sensor; 8. a signal line; 9. a bearing unit; 10. a motor rotor; 11. a motor stator; 12. a power supply line; 13. an electrical connector unit; 14. a support frame; 15. a vibration isolation platform; 16. a power source; 17. an A/D conversion device; 18. an upper computer; 19. a fixing plate; 20. the inner ring supports the shaft.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, elements recited by the phrase "comprising an … …" do not exclude the inclusion of such elements in processes or methods.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
The present invention will be described in further detail with reference to examples.
The specific embodiment 1 of the vibration testing device for a bearing unit provided by the utility model:
in the existing common bearing vibration measuring device, vibration testing is mainly carried out in an atmospheric environment, a corresponding probe or a corresponding sensor is directly contacted with a bearing ring, the difference between the measuring environment and the working environment of an inertial executing mechanism of a spacecraft is large, and the vibration measuring result is inaccurate.
Correspondingly, as shown in fig. 1 and fig. 2, the vibration testing apparatus for a bearing unit provided in this embodiment is used for measuring the bearing unit, where the bearing unit 9 includes two bearings used in pair, each of the bearings includes a bearing inner ring, a bearing outer ring and balls, an inner spacer is supported between the two bearing inner rings, and an outer spacer is supported between the two bearing outer rings, during measurement, the inner rings and the inner spacers of the two bearings are fixedly sleeved on the inner ring supporting shaft 20 correspondingly, thereby implementing a pre-tightening fixed assembly, and meanwhile, the outer rings and the outer spacers of the two bearings are fixedly installed on the outer ring supporting frame 31 correspondingly, so as to facilitate a corresponding vibration test.
Specifically, the vibration testing device is provided with a vacuum box 2 for forming a vacuum environment, and parts arranged in the vacuum box ensure the vibration test of the bearing unit 9, realize the vibration test in the vacuum environment and ensure the accuracy of the measuring result.
The vacuum box 2 comprises a bottom plate and an opening box body arranged in an inverted buckle mode, the bottom opening of the opening box body is hermetically assembled with the bottom plate, the vacuum degree of the vacuum box 2 can be effectively guaranteed, and a sealing ring 5 is arranged at the butt joint of the opening box body and the bottom plate. And a vacuum valve 6 is arranged on the bottom plate and is used for being communicated with a vacuumizing air path to vacuumize the vacuum box 2.
The fixing plate 19 is arranged on the bottom plate, the inner ring supporting shaft 20 is fixedly assembled on the fixing plate 19, the inner ring supporting shaft 20 extends in the vertical direction, the inner ring supporting shaft 20 is used for fixedly assembling an inner ring of the bearing unit 9 to be tested, when the bearing unit 9 is used, the bearing unit 9 is sleeved on the inner ring supporting shaft, and the inner ring supporting shaft are relatively fixedly assembled together.
The motor stator 11 is fixedly assembled on the fixing plate 19 through the stator fastening bolt 4, the motor stator 11 is sleeved outside the inner ring supporting shaft in a clearance mode, the motor rotor 10 is assembled corresponding to the motor stator 11, the motor rotor 10 is also sleeved outside the inner ring supporting shaft in a clearance mode, the motor rotor 10 and the outer ring supporting frame 31 are fixedly assembled together through the rotor fastening bolt 3, and the outer ring supporting frame 31 is used for being fixedly assembled together with the outer ring of the bearing unit 9.
After the motor stator 11 is electrified, the motor rotor 10 rotates, the outer ring is driven to rotate through the outer ring support frame 31, the outer ring drives the rolling body to roll, the rolling body applies exciting force to the inner ring in the rolling process, and the inner ring drives the inner ring support shaft to vibrate together.
The vibration of inner circle back shaft is detected by vibration sensor 7, vibration sensor 7 is three-axis type vibration sensor, vibration sensor 7 passes through rigid connection spare 1 fixed mounting at inner circle back shaft top, rigid connection spare 1 specifically is threaded connection spare, threaded connection spare's lower extreme sets up bottom screw thread post 101, with the internal thread hole threaded connection on inner circle back shaft top, the threaded connection spare upper end sets up top screw hole 102, for vibration sensor 7 screw fastening assembly, the lower extreme of rigid connection spare 1 passes through threaded connection structure and inner circle back shaft 20 fixed assembly, threaded connection structure and vibration sensor 7 fixed assembly are passed through to the upper end of rigid connection spare 1. The vibration sensor 7 and the inner ring supporting shaft 20 are rigidly and fixedly assembled together through a threaded connection piece, when rolling bodies roll, exciting force can be applied to the inner ring, vibration of the inner ring can be fed back and transmitted to the inner ring supporting shaft 20, and vibration parameters are detected by the vibration sensor 7.
In fact, in order to improve the vibration measurement precision, the vacuum box 2 is fixedly installed on a vibration isolation platform 15 through the supporting frame 14, and vibration interference caused by external vibration to the vacuum box 2 is reduced. The vibration isolation platform may adopt a structure commonly used in the prior art, and is not described in detail herein.
In consideration of a vacuum environment, an electric connector unit 13 is centrally arranged on the bottom plate, a signal line 8 and a power supply line 12 are connected to the electric connector unit 13, the power supply line 12 supplies power to a motor stator 11 to drive a motor rotor 10 to rotate, the signal line 8 is connected with the vibration sensor 7, a part of the power supply line 12 is positioned in the vacuum box 2, a part of the power supply line is positioned outside the vacuum box 2, the line positioned in the vacuum box 2 is electrically connected with the motor stator 11, and the line positioned outside the vacuum box is communicated with a power supply 16 to ensure power supply. A part of the signal line 8 is also positioned in the vacuum box 2, a part of the signal line is positioned outside the vacuum box 2, a corresponding line positioned in the vacuum box 2 is connected with the vibration sensor 7, a corresponding line positioned outside the vacuum box 2 is connected with an A/D conversion device 17, and the A/D conversion device 17 is connected with an upper computer 18. The detection data of the vibration sensor 7 is converted by the A/D conversion equipment 17 and then transmitted to the upper computer 18, the vibration signals collected by the three-axis type vibration sensor are converted into digital signals by the A/D conversion equipment 17, vibration information parameters are extracted by the signal processing method of the upper computer 18, and whether the state of the bearing unit 9 is normal or not is judged by combining historical data and alarm thresholds of various parameter indexes.
During assembly, a bearing, a motor rotor 10, a motor stator 11 and the like are correspondingly installed in the vacuum box 2, and the vibration sensor 7 is fixedly installed at the top end of the inner ring supporting shaft through the rigid connecting piece 1.
And then, carrying out vacuum pumping operation on the vacuum box 2, wherein the vacuum degree is less than 10Pa, supporting and mounting the vacuum box 2 after vacuum pumping on a vibration isolation platform 15, connecting a power supply 16 and an A/D conversion device 17, and adjusting the running rotating speed of the bearing unit 9 to the rated working rotating speed so as to carry out corresponding vibration test.
The vibration testing time is not less than 30min, and the running state of the bearing unit is generally evaluated by combining the vibration information parameters with the vertical data and the alarm threshold of each parameter index.
The bearing unit vibration testing device provided by the embodiment carries out the vibration test of the bearing unit, and under the condition that the bearing unit is not disassembled and does not shut down, the running state of the bearing unit is known and mastered through vibration information parameters. The testing device provided by the embodiment is simple and effective in testing and convenient to process and manufacture.
The specific embodiment 2 of the vibration testing device for the bearing unit provided by the utility model comprises the following components:
the difference from example 1 is mainly that: in embodiment 1, the inner ring support shaft is a fixed member, the outer ring support frame is a rotating member, the rotating member is driven to rotate by the motor rotor, and corresponds to a vibration test scenario of the outer ring rotation and corresponds to a bearing of the outer ring rotation. In this embodiment, the inner ring support shaft is a rotating member, the outer ring support frame is a fixed member, at this time, the inner ring support shaft is driven to rotate by the motor rotor, and the outer ring support frame and the vacuum box are relatively and fixedly assembled, and this structure corresponds to a vibration test scene of the rotation of the inner ring and corresponds to a bearing of the rotation of the inner ring. At the moment, the inner ring support shaft serves as a test main shaft and can be driven to rotate by the motor rotor through the motor output shaft.
The specific embodiment 3 of the vibration testing device for a bearing unit provided by the utility model:
the difference from example 1 is mainly that: in embodiment 1, the vibration sensor is fixed to the top of the inner ring support shaft indirectly via a rigid connection. In this embodiment, the vibration sensor can be directly bonded and fixed to the inner ring support shaft, so that effective detection is guaranteed.
The specific embodiment 4 of the vibration testing device for a bearing unit provided by the utility model:
the difference from example 1 is mainly that: in embodiment 1, the inner ring support shaft extends in the up-down direction. In this embodiment, the inner ring support shaft may also extend in the horizontal transverse direction, in which case the rotational center axis of the corresponding motor rotor also extends in the transverse direction.
Finally, although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments without departing from the inventive concept, or some of the technical features may be replaced with equivalents. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A bearing unit vibration testing device, characterized by comprising:
the vacuum box (2) is internally provided with an inner ring support shaft (20) and an outer ring support frame (31);
the inner ring supporting shaft (20) is used for fixedly assembling an inner ring of the bearing unit (9) to be detected;
the outer ring support frame (31) is used for fixedly assembling the outer ring of the detection unit to be detected;
one of the inner ring support shaft and the outer ring support frame (31) is a fixed part, the other one is a rotating part, the fixed part and the vacuum box (2) are relatively fixedly assembled, and the rotating part and the vacuum box (2) are relatively rotatably assembled;
the motor rotor (10) and the motor stator (11) which are matched for use are arranged in the vacuum box (2), the motor rotor (10) and the rotating piece are fixedly assembled to drive the rotating piece to rotate, the inner ring or the outer ring fixedly assembled with the rotating piece drives the rolling body of the bearing unit (9) to rotate, and then the rolling body applies vibration force to the outer ring or the inner ring fixedly assembled with the fixing piece;
and the vibration sensor (7) is directly fixedly arranged on the fixing piece or indirectly fixedly arranged on the fixing piece through a rigid connecting piece (1) and is used for detecting the vibration condition of the outer ring or the inner ring fixedly assembled with the fixing piece.
2. The bearing unit vibration testing apparatus according to claim 1, wherein an axis of said inner ring support shaft extends in an up-down direction.
3. The bearing unit vibration testing device according to claim 2, characterized in that, when said inner ring support shaft serves as said fixture and said vibration sensor (7) is indirectly mounted on said fixture through a rigid connection member (1), said rigid connection member (1) is mounted on top of said inner ring support shaft.
4. The bearing unit vibration testing device according to claim 3, characterized in that said rigid connection member (1) is a threaded connection member having a lower end fixedly fitted with said inner ring support shaft by means of a threaded connection structure and an upper end fixedly fitted with said vibration sensor (7) by means of a threaded connection structure.
5. The bearing unit vibration testing device according to claim 4, wherein the lower end of the threaded connector is provided with a bottom threaded post (101) to be in threaded connection with an internally threaded hole at the top end of the inner ring support shaft, and the upper end of the threaded connector is provided with a top threaded hole (102) for the threaded fastening assembly of the vibration sensor.
6. The bearing unit vibration testing device according to any one of claims 2 to 5, wherein the motor rotor (10) is coaxially and alternately sleeved outside the inner ring supporting shaft, a motor stator (11) is relatively and fixedly assembled in the vacuum box (2), the motor stator (11) is matched with the motor rotor (10) to ensure the motor rotor (10) to normally rotate, the motor stator (11) is in an annular interval, and the motor stator (11) is coaxially and alternately sleeved outside the inner ring supporting shaft.
7. The bearing unit vibration testing arrangement according to any of the claims 1 to 5, characterized in that the vacuum box (2) is support mounted on a vibration isolation platform (15).
8. The bearing unit vibration testing arrangement according to any of the claims 1 to 5, characterized in that the vacuum box (2) comprises a support floor and an open box of an inverted arrangement, the support floor and the open box being sealingly assembled, the support floor being provided with a vacuum structure.
9. The bearing unit vibration testing device according to claim 8, characterized in that an electrical connector unit (13) is centrally arranged on the supporting bottom plate, a signal line (8) and a power supply line (12) are connected to the electrical connector unit (13), the power supply line (12) supplies power to the motor stator (11) to drive the motor rotor (10) to rotate, and the signal line (8) is connected to the vibration sensor (7).
10. The bearing unit vibration testing device according to any of the claims 1 to 5, characterized in that the vibration sensor (7) is a three-axis type vibration sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121928928.8U CN215811633U (en) | 2021-08-17 | 2021-08-17 | Bearing unit vibration testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121928928.8U CN215811633U (en) | 2021-08-17 | 2021-08-17 | Bearing unit vibration testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215811633U true CN215811633U (en) | 2022-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121928928.8U Active CN215811633U (en) | 2021-08-17 | 2021-08-17 | Bearing unit vibration testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215811633U (en) |
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2021
- 2021-08-17 CN CN202121928928.8U patent/CN215811633U/en active Active
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