CN100529699C - Micro-bearing friction torgue measuring instrument - Google Patents
Micro-bearing friction torgue measuring instrument Download PDFInfo
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- CN100529699C CN100529699C CNB2007100419706A CN200710041970A CN100529699C CN 100529699 C CN100529699 C CN 100529699C CN B2007100419706 A CNB2007100419706 A CN B2007100419706A CN 200710041970 A CN200710041970 A CN 200710041970A CN 100529699 C CN100529699 C CN 100529699C
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Abstract
The invention is a microtype bearing friction moment measurer, belonging to the field of measuring and control technique. And the invention comprises: mechanical part, electrical part and embedded system, where the mechanical part is connected with the input end of the electrical part through lead wires and USB interface, and the input and output ends of the electrical part are connected the input and output ends of the embedded system, respectively. And the invention adopts digital image processing technique, embedding technique and auto control technique to be able to accurately measure friction moment of a microtype bearing. And the measurer has simple structure, operating convenience and high measuring accuracy.
Description
Technical field
What the present invention relates to is the surveying instrument in a kind of observation and control technology field, specifically is a kind of micro-bearing friction torgue measuring instrument.
Background technology
During bearing operation, produce relative motion between inner ring, outer ring, retainer and the rolling body, the while also produces the motion-impeding comprehensive moment with direction of rotation, is exactly the moment of friction of bearing.Moment of friction is an important parameter of bearing performance quality.Moment of friction directly has influence on bearing temperature, noise, vibration and energy loss, thereby influences the performance of exact instrument and the accuracy that information is transmitted.
The friction of rolling bearing is mainly from the following aspects:
1) the elastic properties of materials pure rolling friction that lags behind and to cause;
2) the caused friction of differential slip on the rolling surface of contact;
3) rolling body is along the caused friction of the spinning of surface of contact centre normal;
4) simple sliding friction at sliding contact position;
5) viscous friction of lubricant;
Owing to the factor of the moment of friction that influences bearing is a lot, the bearing of same model, its moment of friction is also not necessarily identical, accurately know the moment of friction value of a certain given bearing, just must carry out actual measurement.
There are at present the multiple measuring instrument that is used for micro-bearing friction torgue, these measuring instruments all to adopt the form of force transducer to measure the size of moment of friction both at home and abroad.In order to improve measuring accuracy, wherein the support of measuring system mostly is air support and magnetic levitation support, and the mechanical mechanism complexity is difficult for processing, the cost height; Gear train adopts motor by the belt drives main shaft, main shaft is by two cover roller bearings, the main shaft other end is directly installed measured bearing, and the vibration of belt produces in the transmission radial force, vibration and back-up roller dynamic bearing causes measuring error to the intrinsic moment of friction of measured bearing; Employed in addition hanging strip type sensor accuracy also is difficult to guarantee, also influences measuring accuracy.
Find that through literature search patent name is: bearing frictional torque measuring instrument, publication number: CN 2604674Y to prior art.The bearing frictional torque tester that this patent is mentioned, its structure comprise mechanical host machine part, electric part, computing machine part and scaling system.Motor is by being with the transmission and the friction gearing secondary kind of drive synchronously, realize driving the measured bearing rotation, the moment of friction that measured bearing produces converts electric signal to by monoblock type strain torque sensor, through amplification, filtering, A/D conversion, send into computing machine and carry out data processing.Obtain moment of friction measurement result and moment of friction change curve.Still there is complicated in mechanical structure in the measuring method that this measuring instrument adopts, and the problem that the error that gear train causes is big is therefore low for the moment of friction measuring accuracy of miniature bearing.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of micro-bearing friction torgue measuring instrument is provided.The present invention adopts technology such as digital image processing techniques, embedded technology and automatic control, can accurately measure the moment of friction of micro bearing.This measuring instrument is simple in structure, and is easy to operate, the measuring accuracy height.
The present invention is achieved by the following technical solutions, the present invention includes: mechanical part, electric part and embedded system, mechanical part is connected with the input end of electric part by lead and USB interface, and the input/output terminal of electric part is connected with the embedded system input/output terminal by USB interface respectively;
Described mechanical part comprises: the support of balancing point, measured bearing, bearing holder (housing, cover), DC servo motor, photoelectric encoder, speed reduction unit, DC servo motor system, test bracing strut, industrial camera, support, video camera machine are apart from adjusting mechanism, base; The support of DC servo motor system, test bracing strut and video camera are installed on the base respectively apart from adjusting mechanism; DC servo motor, photoelectric encoder and speed reduction unit directly are connected and fixed on the support and directly are connected and fixed with the test axle; The interior ring of measured bearing is coated on the test axle, and bearing holder (housing, cover) is coated on the outer shroud of test bearing, and balancing point is directly fixed on bearing holder (housing, cover); Industrial camera is fixed in support by erection column, and support and video camera machine are connected to a fixed apart from adjusting mechanism.
Described balancing point is fixed on the outer ring of bearing holder (housing, cover).
Described embedded system, DC servo motor and photoelectric encoder form closed-loop control system.
Described embedded system is connected with industrial camera by USB interface.
Described test axle directly is connected with DC servo motor by speed reduction unit.
Of the present invention is to be added in the moment of friction that the balancing point deflection angle size of bearing outer ring is come the indirectly testing bearing by test.Because the moment of friction of miniature bearing is very little, directly measures the then very big measuring error of existence with torque sensor, try to achieve its moment of friction value so overcome the drift angle that gravity torque produces by indirect measurement bearing frictional torque.Tested Bearing Installation is in the rotating shaft of level, and bearing outer ring is balancing point fixedly.When the inner ring of bearing during along with the rotating shaft uniform rotation, owing to exist frictional rotation moment, this moment of friction will drive the outer ring and balancing point forwards certain angle to, forms mobile equilibrium.The gravitational torque that this moment, balancing point produced just is equal to bearing frictional torque, surveys moment of friction and has just converted check weighing moment to.
Owing to adopted aforesaid technical scheme, the present invention has following advantage:
Integral mechanical structure is simple, cost is low, and has satisfied the measuring accuracy requirement; Owing in measurement, servomotor directly drives measurement axis and rotates, and has eliminated in traditional use sensor measurement to have disturbing factors such as friction force and vibration in the gearing, has improved precision and the reliability measured.
Description of drawings
The each several part structural representation that Fig. 1 relates to for the course of work of the present invention.
Fig. 2 is a physical construction synoptic diagram of the present invention.
Among the figure: the 1---balancing point, the 2---measured bearing, 3---bearing holder (housing, cover), 4---DC servo motor, the 5---photoelectric encoder, 6---speed reduction unit, 7---are tested axle, the support of 8---DC servo motor system, 9---tests bracing strut, the 10----industrial camera, 11---industrial camera fixed support, 12---video camera machine is apart from adjusting mechanism.The 13---base
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated: present embodiment has provided detailed embodiment being to implement under the prerequisite with the technical solution of the present invention, but protection scope of the present invention is not limited to following embodiment.
As Fig. 1, shown in Figure 2, present embodiment comprises: mechanical part, electric part and embedded system, and mechanical part is connected with the input end of electric part by lead and USB interface, and the input/output terminal of electric part is connected with the embedded system input/output terminal by USB interface respectively; Described mechanical part comprises: the support 8 of balancing point 1, measured bearing 2, bearing holder (housing, cover) 3, DC servo motor 4, photoelectric encoder 5, speed reduction unit 6, DC servo motor system, test bracing strut 9, industrial camera 10, support 11, video camera machine are apart from adjusting mechanism 12, base 13; The support 8 of DC servo motor system, test bracing strut 9 and video camera are installed on respectively on the base 13 apart from adjusting mechanism 12; DC servo motor 4, photoelectric encoder 5 and speed reduction unit 6 directly are connected and fixed on the support 8 and directly are connected and fixed with test axle 7; The interior ring of measured bearing 2 is coated on the test axle 7, and bearing holder (housing, cover) 3 is coated on the outer shroud of test bearing 7, and balancing point 1 is directly fixed on bearing holder (housing, cover) 3; Industrial camera 10 is fixed in support 11 by erection column, and support 11 is connected to a fixed apart from adjusting mechanism 12 with the video camera machine.
As shown in Figure 1, embedded system, DC servo motor 4 and photoelectric encoder 5 form closed-loop control system, and bearing test speed stably is provided.The digital camera images acquired, the view data of acquisition is sent into embedded system by USB interface.Carry out Digital Image Processing via software, extract through gray processing processing, binary conversion treatment, profile successively, obtain the drift angle value.Obtain the moment of friction value by formula then, and on liquid crystal display, show the moment of friction value.
As shown in Figure 2, measure main shaft 7 by speed reduction unit 6 directly and DC servo motor 4 join, replaced baroque air-supported or magnetic suspension bearing in the traditional measurement instrument, the shortcoming that the method for belt gear, rolling bearing supporting of having overcome is brought, simplified apparatus structure, reduce the vibration of measured bearing, improved the moment of friction measuring reliability.
Present embodiment is when measuring, embedded system is controlled DC servo motor 4 by USB interface and electric machine controller communication and is at the uniform velocity rotated, directly driving test axle 7 after speed reduction unit 6 slows down rotates, and then the inner ring that drives measured bearing 2 rotates, owing to have friction force between the Internal and external cycle of miniature bearing, so this friction force can be rotated driving bearing outer ring since on the outer ring fixing balancing point 1, balancing point can produce a drift angle that is directly proportional with the friction force size.Embedded system can calculate result and forward and reverse bearing frictional torque change curve of forward and reverse maximum friction moment, average friction moment, torque difference after treatment by the image of industrial camera 10 with certain frequency shooting balancing point 1.Carry out test operation by mouse, keyboard realization man-machine conversation, measuring process is finished automatically by embedded system control.The measurement result liquid crystal display shows, also can file and printout.Adopt the new technology of Digital Image Processing, eliminated the influence that has mismachining tolerance and friction force in machining and the transmission.
Claims (5)
1. micro-bearing friction torgue measuring instrument, comprise: mechanical part, electric part and embedded system, mechanical part is connected with the input end of electric part by lead and USB interface, and the input/output terminal of electric part is connected with the embedded system input/output terminal by USB interface respectively; It is characterized in that described mechanical part comprises: the support (8) of balancing point (1), measured bearing (2), bearing holder (housing, cover) (3), DC servo motor (4), photoelectric encoder (5), speed reduction unit (6), DC servo motor system, test bracing strut (9), industrial camera (10), industrial camera fixed support (11), video camera are apart from adjusting mechanism (12), base (13); The support of DC servo motor system (8), test bracing strut (9) and video camera are installed on respectively on the base (13) apart from adjusting mechanism (12); DC servo motor (4), photoelectric encoder (5) and speed reduction unit (6) directly are fastened on the support (8) of DC servo motor system and go up and directly be connected and fixed with test axle (7); The interior ring of measured bearing (2) is coated on the test axle (7), and bearing holder (housing, cover) (3) is coated on the outer shroud of measured bearing (2), and balancing point (1) directly is fixed on the bearing holder (housing, cover) (3); Industrial camera (10) is fixed in industrial camera fixed support (11) by erection column, and industrial camera fixed support (11) is connected to a fixed apart from adjusting mechanism (12) with video camera.
2. micro-bearing friction torgue measuring instrument as claimed in claim 1 is characterized in that, described balancing point (1) is fixed on the outer ring of bearing holder (housing, cover) (3).
3. micro-bearing friction torgue measuring instrument as claimed in claim 1 is characterized in that, described embedded system, DC servo motor (4) and photoelectric encoder (5) form closed-loop control system.
4. as claim 1 or 3 described micro-bearing friction torgue measuring instruments, it is characterized in that described embedded system is connected with industrial camera (10) by USB interface.
5. micro-bearing friction torgue measuring instrument as claimed in claim 1 is characterized in that, described test axle (7) directly is connected with DC servo motor (4) by speed reduction unit (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100419706A CN100529699C (en) | 2007-06-14 | 2007-06-14 | Micro-bearing friction torgue measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100419706A CN100529699C (en) | 2007-06-14 | 2007-06-14 | Micro-bearing friction torgue measuring instrument |
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| Publication Number | Publication Date |
|---|---|
| CN101067578A CN101067578A (en) | 2007-11-07 |
| CN100529699C true CN100529699C (en) | 2009-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007100419706A Expired - Fee Related CN100529699C (en) | 2007-06-14 | 2007-06-14 | Micro-bearing friction torgue measuring instrument |
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Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102621019A (en) * | 2011-01-30 | 2012-08-01 | 纬创资通股份有限公司 | Clamping fixture, friction testing device possessing the same, and friction testing method |
| CN102706495B (en) * | 2012-05-15 | 2014-07-30 | 广州数控设备有限公司 | Automatic detection device and method for miniature starting torque |
| CN103292941B (en) * | 2013-01-05 | 2015-10-28 | 中国航空工业集团公司西安飞机设计研究所 | A kind of cable pulley system friction force forms tripping device and measuring method |
| CN103234668B (en) * | 2013-04-07 | 2015-07-08 | 上海交通大学 | Device and method for measuring contact pressure of gyrounit |
| CN103335848A (en) * | 2013-07-09 | 2013-10-02 | 西北工业大学 | Testing device of oil drop throwing and ejecting of rotating part and determination method of oil drop mode transition |
| CN104198103A (en) * | 2014-09-12 | 2014-12-10 | 北京新立机械有限责任公司 | On-line real-time measurement system for precision assembly |
| CN106353084B (en) * | 2016-10-12 | 2019-02-01 | 燕山大学 | Joint precision bearing system rigidity and moment of friction performance degradation experimental rig |
| CN108827633B (en) * | 2018-04-25 | 2020-03-31 | 重庆大学 | Intelligent debugging device for paired rolling bearings |
| CN108663210B (en) * | 2018-07-03 | 2020-05-12 | 西安轻工业钟表研究所有限公司 | Method and device for measuring friction torque and friction coefficient of bearing |
| CN109338575B (en) * | 2018-09-20 | 2021-06-15 | 西安工程大学 | Upper and lower beam of loom cooperation method based on friction force feedback |
| CN109342058B (en) * | 2018-10-19 | 2020-07-07 | 东莞理工学院 | Bearing running friction real-time monitoring device for machine manufacturing system |
| CN109297624A (en) * | 2018-11-27 | 2019-02-01 | 河南科技大学 | A kind of auxiliary device for calculating deep groove ball bearing moment of friction |
| CN110031223B (en) * | 2019-04-15 | 2020-11-13 | 浙江省机电产品质量检测所有限公司 | Bearing friction torque measuring device |
| CN110095217B (en) * | 2019-04-26 | 2020-09-22 | 杭州电子科技大学 | Device and method for measuring friction torque of rolling bearing |
| CN114270163A (en) * | 2019-10-15 | 2022-04-01 | 深圳市大疆创新科技有限公司 | Inner rotor assembly testing system and movable platform |
| CN111307435B (en) * | 2020-03-09 | 2023-07-28 | 西南交通大学 | Multimode interface tribology behavior simulation test bed based on vibration decoupling |
| CN112556908B (en) * | 2020-11-26 | 2022-04-08 | 河南科技大学 | Real-time stress detection device and method for rolling friction of elastic rolling ring |
| CN113639906A (en) * | 2021-06-18 | 2021-11-12 | 上海宇航系统工程研究所 | Rolling ring and slip ring friction torque measuring device under high and low temperature |
| CN113532855B (en) * | 2021-07-23 | 2024-03-12 | 北京卫星环境工程研究所 | Ground comprehensive test system for verifying joint life of aerospace mechanical arm |
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2007
- 2007-06-14 CN CNB2007100419706A patent/CN100529699C/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 单摆法检测万向支架轴承摩擦力矩. 宓子宁，颜德田.微计算机信息，第21卷第4期. 2005 |
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| CN101067578A (en) | 2007-11-07 |
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Assignee: Shanghai Schiak Testing Machinery Co., Ltd. Assignor: Shanghai Jiao Tong University Contract record no.: 2010310000115 Denomination of invention: Micro-bearing friction torgue measuring instrument Granted publication date: 20090819 License type: Exclusive License Open date: 20071107 Record date: 20100716 |
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Granted publication date: 20090819 Termination date: 20120614 |