CN102778313A - Device for testing dynamic friction torque of precise micro rolling bearing - Google Patents
Device for testing dynamic friction torque of precise micro rolling bearing Download PDFInfo
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- CN102778313A CN102778313A CN2012101785984A CN201210178598A CN102778313A CN 102778313 A CN102778313 A CN 102778313A CN 2012101785984 A CN2012101785984 A CN 2012101785984A CN 201210178598 A CN201210178598 A CN 201210178598A CN 102778313 A CN102778313 A CN 102778313A
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- dynamic friction
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Abstract
The invention relates to a device for testing the dynamic friction torque of a precise micro rolling bearing. The device comprises a machine base, an air static pressure suspension bearing block, two sets of tested bearings, a driving electric spindle, a pressure sensor and a speed sensor, wherein the two sets of tested bearings are arranged in a central hole of a suspension shaft in the air static pressure suspension bearing block; a rotary central spindle is sleeved in the central hole of the two sets of tested bearings and is connected with the driving electric spindle through a rubber hose flexible coupling; the pressure sensor is arranged on the part close to the left end of the suspension shaft; and the speed sensor is arranged on the part close to the right end of the suspension shaft. The dynamic friction torque of the tested bearings can be tested in real time in a start process, a stop process and an operation process with different rotation speeds.
Description
Technical field
The present invention relates to a kind of bearing dynamic property testing machine, specifically is a kind of accurate miniature rolling bearing dynamic friction torque test device.
Background technology
The accurate miniature rolling bearing is made up of outer ring, inner ring, ball rolling body and retainer; It is the support unit of rotating machinery in exact instrument and the instrument, is widely used in the accurate sensing instrument, instrument of high-end sciemtifec and technical spheres such as Aeronautics and Astronautics, navigation, diving.The parameter of expression bearing dynamic property and overall quality has a lot; The inner moment of friction of its centre bearer is one of most important dynamic characteristic parameter and technical indicator; It is the concrete reflection of virtual conditions such as bearing when operation internal lubrication state, carrying situation, temperature variation, rubbing wear, directly influences the precision and the overall performance of instrument and meter.
The accurate miniature rolling bearing is because size is all very little with carrying; Its inner moment of friction is very little in the operational process; And change with rotating speed is different; In test process, be easy to receive other factors influence on every side and cause measuring error bigger, be difficult to the actual dynamic friction torque of true reflection.Therefore need a kind of accurate miniature rolling bearing dynamic friction torque test device of design, with test starting, shutdown, speed change or the inner dynamic friction torque of accurate miniature rolling bearing when different rotating speeds moves.
Summary of the invention
The objective of the invention is to the problem that when at present the accurate miniature rolling bearing move test error of dynamic friction torque is big, be difficult to the dynamic friction torque of true reflection reality; A kind of proving installation of accurate miniature rolling bearing dynamic friction torque is provided, can be accurately and real-time testing go out by the dynamic friction torque of examination accurate miniature rolling bearing.
For achieving the above object, design of the present invention is following:
Accurate miniature rolling bearing dynamic friction torque test device of the present invention is mainly in order to the dynamic friction torque in the test accurate miniature rolling bearing operational process.It mainly by support, static air pressure levitation axis bearing, the support etc. that tried bearing, internal space ring and external space ring, rotation mandrel, drive electric main shaft, rubber hose flexible connection, pressure transducer, speed pickup and lay sensor forms.Said static air pressure levitation axis bearing is according to the aerostatic bearing principle; Adopt the suspension bearing holder structure of static air pressure supporting; Levitation axis is unsettled fully and separated fully with other exterior part on every side together by the examination bearing, avoid the influence of any contact to test result; Each two cover bearings are tested in pairs during test, and the axial preload of bearing is applied by the stand out of inside and outside spacer ring between the examination bearing through two, and utilizes the electric main shaft of variable ratio frequency changer speed governing to drive; Drive electric main shaft and by between the examination bearing rotation mandrel with the connection of rubber hose flexible connection, avoid driving the influence of vibration and the heat of electric main shaft to tested accurate miniature rolling bearing in the levitation axis bearing; During test; Rotate together through flexible connection driven rotary mandrel with by bearing inner race by driving electric main shaft; Because by function of friction between examination bearing internal ball rolling body and the inner and outer ring raceway, make the trend that rotation is arranged by examination bearing outer ring and levitation axis together, the driving lever that utilization is installed in the levitation axis left end compresses rack-mount pressure transducer; And the piezoelectric signal in the pressure transducer delivered to data collecting card, signal amplifier and the controlling computer that is attached thereto; Obtain driving lever and act on the pressure on the sensor, this pressure multiply by driving lever to the distance of rotating the mandrel axis, can obtain to be tried the bearing dynamic friction torque in when rotation.
According to the foregoing invention design, the present invention adopts following technical proposals:
A kind of accurate miniature rolling bearing dynamic friction torque test device; Comprise that support, static air pressure levitation axis bearing, two covers are tried bearing, drive electric main shaft, pressure transducer and speed pickup; It is characterized in that: said two covers are placed in the center pit of the levitation axis in the static air pressure levitation axis bearing by the examination bearing, and two covers are fixedly sleeved by examination bearing center hole and a rotation mandrel; Said rotation mandrel connects the electric main shaft of driving through a rubber hose flexible connection; Near said levitation axis left end, said pressure transducer is installed; Near the levitation axis right-hand member, said speed pickup is installed.
Described accurate miniature rolling bearing dynamic friction torque test device; It is characterized in that: said static air pressure levitation axis bearing is installed on the support with the electric main shaft of driving; According to the aerostatic bearing principle; Utilize pressurized air that levitation axis is unsettled fully and separated fully with other exterior parts on every side together by the examination bearing, avoid the influence of any contact test result.
Described accurate miniature rolling bearing dynamic friction torque test device is characterized in that: utilize to place two covers by the stand out of cone spacer and outer ring spacer between the examination bearing quilt examination bearing to be applied axial preload.
Described accurate miniature rolling bearing dynamic friction torque test device; It is characterized in that: a driving lever is installed at the levitation axis left end; This driving lever is pressed on the pressure transducer on the pressure transducer; Pressure transducer is installed on the pressure transducer support, with the dynamic friction torque of test bearing; The installation rate sensor test goes out to rotate the actual speed of mandrel on the speed pickup support.
The present invention has following conspicuous outstanding substantive distinguishing features and marked improvement compared with prior art:
The present invention through pressurized air make install unsettled and have no with outside other parts and to contact by the levitation axis of examination bearing, so can be accurately and real-time testing go out to be tried the dynamic friction torque of accurate miniature rolling bearing.Drive electric main shaft and can utilize the frequency converter frequency control; Said speed pickup can detect the rotating speed of rotation mandrel in real time; Promptly tried the actual motion speed of bearing, so utilize this proving installation accurately to try the dynamic friction torque of bearing in startup, shutdown and different rotating speeds operational process with real-time reflection quilt.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a static air pressure suspension bearing holder structure synoptic diagram of the present invention.
Embodiment
The preferred embodiments of the present invention combine detailed description of the drawings following:
Embodiment one:
Referring to Fig. 1 and Fig. 2; This accurate miniature rolling bearing dynamic friction torque test device; Comprise that support (6), static air pressure levitation axis bearing (5), two covers are tried bearing (20), drive electric main shaft (10), pressure transducer (3) and speed pickup (8), it is characterized in that:
1) said two covers are placed in the center pit of the levitation axis (4) in the static air pressure levitation axis bearing (5) by examination bearing (20), and two covers are fixedly sleeved by examination bearing (a 20) center pit and a rotation mandrel (19);
2) said rotation mandrel (19) connects driving electric main shaft (10) through a rubber hose flexible connection (9);
3) near said levitation axis (4) left end, said pressure transducer (3) is installed,, said speed pickup (8) is installed near levitation axis (4) right-hand member.
Embodiment two:
Described accurate miniature rolling bearing dynamic friction torque test device; It is characterized in that: said static air pressure levitation axis bearing (5) and the electric main shaft of driving (10) are installed on the support (6); According to the aerostatic bearing principle; Utilize pressurized air that levitation axis (4) is unsettled fully and separated fully with other exterior parts on every side together by examination bearing (20), avoid the influence of any contact test result.
Described accurate miniature rolling bearing dynamic friction torque test device is characterized in that: utilize to place two covers by the stand out of cone spacer (16) and outer ring spacer (17) between the examination bearing (20) quilt examination bearing (20) to be applied axial preload.
Described accurate miniature rolling bearing dynamic friction torque test device; It is characterized in that: a driving lever (1) is installed at levitation axis (4) left end; This driving lever (1) is pressed on the pressure transducer (3) on the pressure transducer (3); Pressure transducer (3) is installed on the pressure transducer support (2), with the dynamic friction torque of test bearing; Go up the actual speed that installation rate sensor (8) tests out rotation mandrel (19) at speed pickup support (7).
Embodiment three:
Shown in Figure 1; Accurate miniature rolling bearing dynamic friction torque test device; Include: static air pressure levitation axis bearing (5) and the electric main shaft of driving (10) are installed on the support (6), and be according to the aerostatic bearing principle, that levitation axis (4) is unsettled fully; And with rubber hose flexible connection (9) connection, a driving lever (1) that is installed in levitation axis (4) left end simultaneously is pressed on the pressure transducer (3) that is installed in pressure transducer support (2).
Above-mentioned described static air pressure levitation axis bearing (5); As shown in Figure 2; It includes: pressurized air feeds and is installed in the admission piece (15) on the shell (11); Through gas channel (12), it is unsettled with levitation axis (4) to get into aerostatic bearing (13), leads to the external world from outlet nozzle (21).Two covers of mounted in pairs are installed in the levitation axis (4) by examination bearing (21); Utilization place two covers by the stand out of cone spacer (16) between examination bearings (20) and outer ring spacer (17) to being applied axial preload by examination bearing (20), and quilt is tried bearing (20) location and installation with the nut (14) that is installed in rotation mandrel (19) left end and the end face nut (18) of levitation axis (4) right-hand member.
During test, each two cover bearings are tested in pairs, and the axial preload of bearing is applied by the stand out of the inside and outside spacer ring (16 and 17) between the examination bearing (20) through two, and utilizes the driving electricity main shaft (10) of variable ratio frequency changer speed governing to drive; Between driving electric main shaft (10) and rotation mandrel (19), connect, avoid driving the vibration of electric main shaft (10) and heat tries bearing (20) to quilt in the levitation axis (4) influence with rubber hose flexible connection (9); During test; Rotate together through flexible connection (9) driven rotary mandrel (19) with by bearing (20) inner ring by driving electric main shaft (10); Because by function of friction between examination bearing (20) internal ball rolling body and the inner and outer ring raceway; Make the trend that rotation is arranged by examination bearing (20) outer ring and levitation axis (4) together; The driving lever (1) that utilization is installed in levitation axis (4) left end compresses the pressure transducer (3) that is installed on the support (2); And the piezoelectric signal in the pressure transducer (3) delivered to data collecting card, signal amplifier and the controlling computer that is attached thereto, and obtain driving lever (1) and act on the pressure on the pressure transducer (3), this pressure multiply by driving lever (1) to the distance of rotating mandrel (20) axis
LCan obtain the dynamic friction torque of two cover quilt examination bearings (20) in startup, shutdown and different rotating speeds operational process, and utilize the speed pickup (8) that is installed on the speed pickup support (7) to test out the actual speed of rotation mandrel (19) and two cover quilt examination bearings (20).
Claims (4)
1. accurate miniature rolling bearing dynamic friction torque test device; Comprise that support (6), static air pressure levitation axis bearing (5), two covers are tried bearing (20), drive electric main shaft (10), pressure transducer (3) and speed pickup (8), it is characterized in that:
1) said two covers are placed in the center pit of the levitation axis (4) in the static air pressure levitation axis bearing (5) by examination bearing (20), and two covers are fixedly sleeved by examination bearing (a 20) center pit and a rotation mandrel (19);
2) said rotation mandrel (19) connects driving electric main shaft (10) through a rubber hose flexible connection (9);
3) near said levitation axis (4) left end, said pressure transducer (3) is installed,, said speed pickup (8) is installed near levitation axis (4) right-hand member.
2. accurate miniature rolling bearing dynamic friction torque test device according to claim 1; It is characterized in that: said static air pressure levitation axis bearing (5) and the electric main shaft of driving (10) are installed on the support (6); According to the aerostatic bearing principle; Utilize pressurized air that levitation axis (4) is unsettled fully and separated fully with other exterior parts on every side together by examination bearing (20), avoid the influence of any contact test result.
3. accurate miniature rolling bearing dynamic friction torque test device according to claim 1 is characterized in that: utilize to place two covers by the stand out of cone spacer (16) and outer ring spacer (17) between the examination bearing (20) quilt examination bearing (20) to be applied axial preload.
4. accurate miniature rolling bearing dynamic friction torque test device according to claim 1; It is characterized in that: a driving lever (1) is installed at levitation axis (4) left end; This driving lever (1) is pressed on the pressure transducer (3) on the pressure transducer (3); Pressure transducer (3) is installed on the pressure transducer support (2), with the dynamic friction torque of test bearing; Go up the actual speed that installation rate sensor (8) tests out rotation mandrel (19) at speed pickup support (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012101785984A CN102778313A (en) | 2012-06-02 | 2012-06-02 | Device for testing dynamic friction torque of precise micro rolling bearing |
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| CN2012101785984A CN102778313A (en) | 2012-06-02 | 2012-06-02 | Device for testing dynamic friction torque of precise micro rolling bearing |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048072A (en) * | 2012-12-14 | 2013-04-17 | 瓦房店轴承集团有限责任公司 | Bearing torque detection testing machine |
| CN103528741A (en) * | 2013-10-25 | 2014-01-22 | 中国科学院西安光学精密机械研究所 | Device and method for testing friction torque of bearing under actual working conditions |
| CN103759871A (en) * | 2014-01-02 | 2014-04-30 | 上海大学 | Device for testing dynamic friction torque of air static-pressure axial thrust bearing |
| CN103968981A (en) * | 2014-04-14 | 2014-08-06 | 上海大学 | Testing device for high-speed miniature bearing dynamic friction torque |
| CN106092398A (en) * | 2016-08-08 | 2016-11-09 | 上海大学 | A kind of high-speed micro bearing dynamic friction torque measuring instrument |
| CN107063688A (en) * | 2017-04-05 | 2017-08-18 | 上海大学 | Match angular contact ball bearing Dynamic wear test device |
| CN108918128A (en) * | 2018-08-02 | 2018-11-30 | 南京梵科智能科技有限公司 | A kind of intelligent apparatus for rotating machinery progress fault location |
| CN108918129A (en) * | 2018-08-02 | 2018-11-30 | 南京梵科智能科技有限公司 | A kind of intelligent apparatus of pair of slewing implementing monitoring |
| CN109060210A (en) * | 2018-09-03 | 2018-12-21 | 北京控制工程研究所 | A kind of bearing frictional torque measurement method and system based on piezoelectric ceramics |
| CN109211551A (en) * | 2018-09-14 | 2019-01-15 | 南京梵科智能科技有限公司 | A kind of trouble-shooter for rotating machinery |
| CN109520737A (en) * | 2018-11-27 | 2019-03-26 | 河南科技大学 | A kind of measuring method of deep groove ball bearing moment of friction |
| CN111707386A (en) * | 2020-06-28 | 2020-09-25 | 上海理工大学 | Dynamic and static pressure main shaft bearing temperature and dynamic pressure testing structure device |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048072A (en) * | 2012-12-14 | 2013-04-17 | 瓦房店轴承集团有限责任公司 | Bearing torque detection testing machine |
| CN103528741A (en) * | 2013-10-25 | 2014-01-22 | 中国科学院西安光学精密机械研究所 | Device and method for testing friction torque of bearing under actual working conditions |
| CN103528741B (en) * | 2013-10-25 | 2015-12-30 | 中国科学院西安光学精密机械研究所 | The proving installation of moment of friction and method under a kind of bearing actual condition |
| CN103759871A (en) * | 2014-01-02 | 2014-04-30 | 上海大学 | Device for testing dynamic friction torque of air static-pressure axial thrust bearing |
| CN103968981A (en) * | 2014-04-14 | 2014-08-06 | 上海大学 | Testing device for high-speed miniature bearing dynamic friction torque |
| CN106092398A (en) * | 2016-08-08 | 2016-11-09 | 上海大学 | A kind of high-speed micro bearing dynamic friction torque measuring instrument |
| CN107063688A (en) * | 2017-04-05 | 2017-08-18 | 上海大学 | Match angular contact ball bearing Dynamic wear test device |
| CN107063688B (en) * | 2017-04-05 | 2019-06-25 | 上海大学 | Match angular contact ball bearing Dynamic wear test device |
| CN108918128A (en) * | 2018-08-02 | 2018-11-30 | 南京梵科智能科技有限公司 | A kind of intelligent apparatus for rotating machinery progress fault location |
| CN108918129A (en) * | 2018-08-02 | 2018-11-30 | 南京梵科智能科技有限公司 | A kind of intelligent apparatus of pair of slewing implementing monitoring |
| CN109060210A (en) * | 2018-09-03 | 2018-12-21 | 北京控制工程研究所 | A kind of bearing frictional torque measurement method and system based on piezoelectric ceramics |
| CN109211551A (en) * | 2018-09-14 | 2019-01-15 | 南京梵科智能科技有限公司 | A kind of trouble-shooter for rotating machinery |
| CN109520737A (en) * | 2018-11-27 | 2019-03-26 | 河南科技大学 | A kind of measuring method of deep groove ball bearing moment of friction |
| CN109520737B (en) * | 2018-11-27 | 2020-05-19 | 河南科技大学 | Method for measuring and calculating friction torque of deep groove ball bearing |
| CN111707386A (en) * | 2020-06-28 | 2020-09-25 | 上海理工大学 | Dynamic and static pressure main shaft bearing temperature and dynamic pressure testing structure device |
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Application publication date: 20121114 |