CN100387954C - Measuring for friction torque of bearing under micro-loading at different rotation rate and measuring apparatus therefor - Google Patents
Measuring for friction torque of bearing under micro-loading at different rotation rate and measuring apparatus therefor Download PDFInfo
- Publication number
- CN100387954C CN100387954C CNB2006100520868A CN200610052086A CN100387954C CN 100387954 C CN100387954 C CN 100387954C CN B2006100520868 A CNB2006100520868 A CN B2006100520868A CN 200610052086 A CN200610052086 A CN 200610052086A CN 100387954 C CN100387954 C CN 100387954C
- Authority
- CN
- China
- Prior art keywords
- dynamometer
- bearing
- moment
- measured bearing
- main shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The present invention relates to a method for measuring the friction torque of a bearing with the micro load and at different rotary speeds and a measuring apparatus. A thin nylon wire with one end connected with a weight and the other end connected with a dynamometer is hung on a measured bearing. When the measured bearing with the diameter D is still, the pulling force of the weight and the pulling force of the dynamometer are balanced, and a display value on the dynamometer is A1. If the bearing runs at a certain rotation direction and at certain rotary speed, the display value on the dynamometer is increased to A2, and the friction torque value of the bearing at the corresponding rotary speed is calculated through M=(A2-A1). D/2. An electric main shaft which is arranged on a bracket and is connected with the measured bearing modulates the frequency and changes the speed. Simultaneously, the corresponding A2 value is displayed on the dynamometer and the friction torque values of the bearing at different rotating speeds are calculated by the formula. The present invention has the advantages of simple principle of the measuring method, reliable method, simple structure of the measuring apparatus, few measurement items, easy operation, direct measurement and display, small measurement error, high accuracy, real data and strong practicability. Besides, the present invention solves the problems which need to be solved urgently by users.
Description
Technical field
The present invention relates to the measuring method and the equipment therefor of bearing frictional torque, particularly a kind of bearing under micro-loading, The measure of frictional moment of different rotational speed and the survey meter.
Background technology
The method that is usually used in measuring medium and small bearing frictional torque is the manual measurement method, on the rotatable platform that soon bearing will be placed on torque sensor links to each other, 4 right cylinder clamp shaft bearing outer-rings are arranged on the rotatable platform, rotate the axle that inserts in the bearing inner race aperture by hand, axle rotates and drives the outer ring by inner ring and rotates, thereby pass through rotatable platform, torque sensor makes connected indicating instrument show the friction force value of bearing, this method is rotated with manual methods, not only rotational speed is slow, inhomogeneous, and measuring error is big, the moment of friction under the various rotating speeds of energy measurement not, the more not moment of friction of energy measurement under at a high speed.
Patent No. CN03242670.4 " bearing frictional torque measuring instrument " just provides each action of a kind of measuring process to be finished automatically by computer control, and measurement result can show at random, file or printout.But its structure is complicated, in the whole measuring process, the moment of friction that measured bearing produces converts electric signal to by whole strain torque sensor, through amplification, filtering, A/D conversion, send into computing machine and carry out data processing, not direct measurement, but measure indirectly that measuring accuracy is not high, only the moment of friction under the energy measurement slow-speed of revolution can't be measured the moment of friction under the different rotating speeds.
Number of patent application CN200510049805.6 " friction force of bearing under tiny load measuring method and device " utilizes power upwards, from top to being placed with the measurement bay imposed load of measured bearing, be suspended in the gravity of measurement bay in the rotating shaft itself with balance, the realization tiny load is measured the angle that is produced after the pulling force balance of friction force and off normal, under leverage, be enlarged into the perpendicular displacement of extension arm end, use non-contacting sensor to realize slip, the friction force of rolling bearing and the accurate measurement of friction factor.After measurement friction force relies on and is suspended in the moment of friction and loading moment balance of the measurement bay in the rotating shaft, just handy measure equation calculating and error were no more than 5% when the rotational angle θ that produces wanted＜5 °, therefore there is certain limitation, also be indirect displacement measurement simultaneously, data and the parameter measured are many, troublesome poeration, measuring accuracy are not high, can't measure the moment of friction under the different rotating speeds.
Summary of the invention
Technical matters to be solved by this invention is: a kind of bearing under micro-loading, The measure of frictional moment of different rotational speed and the survey meter are provided, can directly measure the moment of friction value of bearing under different rotating speeds, and measuring method, device is simple and reliable and measuring accuracy is high, also can measure
The moment of friction of specification bearing under different rotating speeds.
The present invention addresses the above problem the technical scheme that is adopted:
Hang with an end on moment of friction measuring method: a, the measured bearing and connect the messenger wire that weights one end connects dynamometer, when measured bearing is static, the pulling force balance on the messenger wire on weights and the dynamometer, at this moment the displayed value on the dynamometer is A
1, when measured bearing rotated by certain sense of rotation, under a certain rotating speed, corresponding displayed value was A on the dynamometer
2, measured bearing outer diameter D, moment of friction M=(A
2-A
1) D/2;
B, change are installed in the different rotating speeds of measured bearing on the electric main shaft, show corresponding A from dynamometer simultaneously
2Value is with M=(A
2-A
1) D/2 calculates the pairing moment of friction of measured bearing under the various different rotating speeds.
The moment of friction measuring instrument: be made up of the measurement mechanism that is installed on the base, described measurement mechanism is connected on the base by the bracing frame adjustable ground that dynamometer is installed, and the electric main shaft of variable-ratio is installed on the support that is fixed in base; One end is connected the messenger wire that an end is connected with dynamometer and hangs on the measured bearing during measurement with weights, and measured bearing and anti-release member also are installed on the spindle specially of described electric spindle nose during measurement.
1), the principle of work of this measuring method and moment of friction measuring instrument compared with prior art, the invention has the advantages that:, be according to moment of friction formula M=(A
2-A
1) D/2, as long as utilize dynamometer just can directly demonstrate the friction force of measured bearing under certain rotating speed, just obtain the moment of friction value by formula calculating.
The computing formula that prior art is used
, having comprised a lot of contents in the friction factor, P loading force, G measurement bay weight, R loading force application point are to the distance at measurement bay center, r rotating shaft radius etc.Rotational angle θ under the Frotteurism must be under＜5 ° situation, and error is no more than 5% just use value, so the limitation of the method is very big, measurement data multioperation trouble is measured the big poor accuracy of cumulative errors.
2), this method is directly to utilize dynamometer to measure different rotating speeds friction force down, prior art but is that employing monoblock type strain torque sensor or contactless position sensor-based system are measured indirectly.
3), measurement axis of this measuring instrument and driving shaft are same electric main shafts, measured bearing is to be directly installed on the spindle specially of electric front-end of spindle, the measurement axis of prior art and driving shaft are two complete separate piece, are the secondary indirect drive by the sliding friction transferring power between driving shaft and the measured bearing both ends of the surface to measurement axis.
4), this method is as long as constantly change the rotating speed of electric main shaft by frequency modulation, just can measure the moment of friction of bearing under 100～10000 rev/mins of different rotating speeds, as long as transposing is installed in the spindle specially of electric front-end of spindle, just can be used for the measurement of various different size bearings, and the measuring method of prior art and measuring instrument can't be used to measure the moment of friction of bearing under different rotating speeds.
In sum, this measuring method principle is simple, method is reliable, and measuring instrument is simple in structure, and the measurement project is few, easy to operate, and can directly measure, directly show, no intermediate conversion process, so measuring error is little, accuracy of measurement height, data are true.Solved the problem that bearing user urgent need will solve, so practicality is stronger.
Description of drawings
The structural representation of Fig. 1, moment of friction measuring instrument of the present invention (duty).
The left view of Fig. 2, Fig. 1.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.
The moment of friction measuring method: a), choose the weight of weights when measured bearing is static, hang a superfine nylon filament 6 in the middle of the bearing outside diameter, hang weights 5 at an end of nylon filament 6, nylon filament end in addition is connected with dynamometer.Weights 5 weight will make nylon filament 6 not have relative slip with measured bearing 7 outer rings and be as the criterion.
When measured bearing is static, the pulling force balance of weights 5 and dynamometer 4, the displayed value A on the dynamometer 4 at this moment
1(newton N), when measured bearing and spindle specially counterclockwise rotate, with certain desired speed rotation, weights descends bearing inner race under spindle specially drives, and displayed value increases to A on the dynamometer
2(newton N), the product of the added value of dynamometer displayed value and measured bearing radius is the moment of friction value M=(A of measured bearing under this desired speed
2-A
1) D/2, D is measured bearing external diameter millimeter mm;
B), change the different rotating speeds that is installed in measured bearing on the electric main shaft: promptly realize electric main shaft 10 speed changes, thereby make measured bearing 7 speed changes, from dynamometer 4, can demonstrate corresponding A simultaneously by frequency modulation
2Value is according to M=(A
2-A
1) D/2 calculates the moment of friction value of pairing measured bearing under different rotating speeds.
For measuring the moment of friction value of different size bearing, the spindle specially of interchangeable different size inserts respectively on the electric main shaft 10, uses in order to the measured bearing that different size is installed.
During use, measured bearing 7 is installed on the spindle specially that inserts electric main shaft 10 ends, nylon filament 6 hangs in the middle of the measured bearing external diameter, to receive on the electric main shaft 10 by the power lead of frequency modulation device, realize changing the rotating speed of electric main shaft, drive measured bearing and under different rotating speeds, rotate, weights whereabouts dynamometer displayed value is increased, calculate moment of friction value under different rotating speeds with regard to available above-mentioned moment of friction formula.
The method and measuring instrument can be used for the measurement of sliding bearing moment of friction value equally.
Claims (7)
1. a bearing under micro-loading, different rotating speeds moment of friction measuring method, it is characterized in that: hang with an end on a, the measured bearing and connect the messenger wire that weights one end connects dynamometer, when measured bearing is static, the pulling force balance on the messenger wire on weights and the dynamometer, at this moment the displayed value on the dynamometer is A
1, when measured bearing rotated by certain sense of rotation, under a certain rotating speed, corresponding displayed value was A on the dynamometer
2, measured bearing outer diameter D, moment of friction M=(A
2-A
1) D/2;
B, change are installed in the different rotating speeds of measured bearing on the electric main shaft, demonstrate corresponding A from dynamometer simultaneously
2Value is with M=(A
2-A
1) D/2 calculates the pairing moment of friction value of measured bearing under various different rotating speeds.
2. bearing under micro-loading according to claim 1, different rotating speeds moment of friction measuring method is characterized in that making electric main shaft speed change with frequency modulation method, thereby make the measured bearing speed change that is connected on the electric main shaft.
3. moment of friction measuring instrument that is used for the described method of claim 1, form by the measurement mechanism that is installed on the base (1), the structure that it is characterized in that described measurement mechanism is connected on the base (1) for bracing frame (2) adjustable ground that dynamometer (4) are installed, and the electric main shaft (10) of variable-ratio is installed on the two stands (3) that is fixed in base (1); Measured bearing and anti-release member also are installed on the spindle specially of described electric spindle nose, and one end is connected an end and hangs on the measured bearing with the messenger wire that dynamometer (4) is connected during measurement with weights (5).
4. moment of friction measuring instrument according to claim 3 is characterized in that messenger wire selects superfine nylon filament (6) for use, hangs in the middle of measured bearing (7) external diameter.
5. moment of friction measuring instrument according to claim 3, it is characterized in that dynamometer (4) selects high-precision digital force gauge for use, the electric main shaft (10) of variable-ratio is selected high-precision electric main shaft for use, the line of force of dynamometer (4) is overlapped with measured bearing (7) external diameter tangent line, after bracing frame (2) is screwed on base (1).
6. moment of friction measuring instrument according to claim 3, it is characterized in that two stands (3) is screwed on base (1), it is interior also fixing with screw (11) that electricity main shaft (10) is installed in the circular hole of two stands (3) upper end, and measured bearing (7) is installed on the spindle specially that inserts electric main shaft (10) end.
7. moment of friction measuring instrument according to claim 3 is characterized in that the anti-release member of installing on the spindle specially of electric main shaft (10) end is pressing plate (9), and pressing plate (9) is fixed on the spindle specially with screw (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100520868A CN100387954C (en) | 2006-06-22 | 2006-06-22 | Measuring for friction torque of bearing under micro-loading at different rotation rate and measuring apparatus therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100520868A CN100387954C (en) | 2006-06-22 | 2006-06-22 | Measuring for friction torque of bearing under micro-loading at different rotation rate and measuring apparatus therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1865878A CN1865878A (en) | 2006-11-22 |
| CN100387954C true CN100387954C (en) | 2008-05-14 |
Family
ID=37424962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100520868A Active CN100387954C (en) | 2006-06-22 | 2006-06-22 | Measuring for friction torque of bearing under micro-loading at different rotation rate and measuring apparatus therefor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100387954C (en) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100478663C (en) * | 2007-05-14 | 2009-04-15 | 中国科学院上海技术物理研究所 | Detector for measuring bearing friction torque |
| CN102519639A (en) * | 2011-12-14 | 2012-06-27 | 河南科技大学 | Friction torque measurement apparatus of horizontal bearing |
| CN103162884A (en) * | 2013-02-04 | 2013-06-19 | 西北工业大学 | Device capable of measuring static torque |
| CN104748898A (en) * | 2013-12-31 | 2015-07-01 | 贵州航天乌江机电设备有限责任公司 | Method and device for measuring actual static frictional torque of rolling bearing |
| CN103808445B (en) * | 2014-01-15 | 2016-05-18 | 洛阳理工学院 | The manual detector of a kind of portable bearing starting friction moment |
| CN104034366B (en) * | 2014-03-28 | 2017-02-22 | 江阴万讯自控设备有限公司 | Electric actuator detection device and detection method thereof |
| CN105136364B (en) * | 2015-09-16 | 2018-07-31 | 河北汉光重工有限责任公司 | A kind of stabilized platform sports ring eccentric moment measurement method |
| CN105277364A (en) * | 2015-11-02 | 2016-01-27 | 常熟长城轴承有限公司 | Bearing friction torque measuring instrument |
| CN105258835B (en) * | 2015-11-27 | 2018-07-06 | 上海电气凯士比核电泵阀有限公司 | A kind of method and device measured for sliding bearing liquid film friction torque |
| KR101788071B1 (en) | 2016-05-12 | 2017-11-15 | 강원대학교 산학협력단 | Underwater bearing test system |
| CN106092405A (en) * | 2016-06-06 | 2016-11-09 | 哈尔滨电机厂有限责任公司 | Measure the hydraulic means moment of friction methods such as hydrostatic bearing |
| 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 |
| CN107976314A (en) * | 2017-11-24 | 2018-05-01 | 四川凌峰航空液压机械有限公司 | Calibration tape carries the device of bearing frictional torque |
| CN108775982B (en) * | 2018-06-08 | 2020-04-07 | 陕西理工大学 | Measuring device and measuring method for rotational friction torque of shafting shaft lever |
| 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 |
| CN109186829A (en) * | 2018-08-27 | 2019-01-11 | 四川大学 | A kind of device for air heat engine experiment precise measurement torque |
| CN110702287A (en) * | 2019-10-16 | 2020-01-17 | 中国航发哈尔滨轴承有限公司 | Rotating friction torque measuring device and measuring method for paired bearings |
| CN115096489A (en) * | 2022-06-30 | 2022-09-23 | 河北汉光重工有限责任公司 | Brush friction torque measuring method and system of brush torque motor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4763508A (en) * | 1985-10-12 | 1988-08-16 | Deutsche Forschungs- Und Versuchsanstalt Fur Luft- Und Raumfahrt E.V. | Method for determining the friction torque of a test bearing |
| CN2131101Y (en) * | 1992-06-04 | 1993-04-28 | 清华大学 | Torque and rotary speed measurer for motor |
| JPH11241957A (en) * | 1998-02-25 | 1999-09-07 | Namiki Precision Jewel Co Ltd | Minute torque detecting means and its system |
| CN2604674Y (en) * | 2003-03-27 | 2004-02-25 | 洛阳轴研科技股份有限公司 | Bearing friction force torque measuring instrument |
| CN1687728A (en) * | 2005-05-24 | 2005-10-26 | 浙江大学 | Method and device for measuring friction force of bearing under tiny load |
-
2006
- 2006-06-22 CN CNB2006100520868A patent/CN100387954C/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4763508A (en) * | 1985-10-12 | 1988-08-16 | Deutsche Forschungs- Und Versuchsanstalt Fur Luft- Und Raumfahrt E.V. | Method for determining the friction torque of a test bearing |
| CN2131101Y (en) * | 1992-06-04 | 1993-04-28 | 清华大学 | Torque and rotary speed measurer for motor |
| JPH11241957A (en) * | 1998-02-25 | 1999-09-07 | Namiki Precision Jewel Co Ltd | Minute torque detecting means and its system |
| CN2604674Y (en) * | 2003-03-27 | 2004-02-25 | 洛阳轴研科技股份有限公司 | Bearing friction force torque measuring instrument |
| CN1687728A (en) * | 2005-05-24 | 2005-10-26 | 浙江大学 | Method and device for measuring friction force of bearing under tiny load |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1865878A (en) | 2006-11-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100387954C (en) | Measuring for friction torque of bearing under micro-loading at different rotation rate and measuring apparatus therefor | |
| CN101487751B (en) | Measuring apparatus for frictional moment of bearing under different axial loads and rotation speeds | |
| CN100529699C (en) | Micro-bearing friction torgue measuring instrument | |
| CN202255755U (en) | Calibrating device for calibrating torsion and corner measuring mechanism | |
| CN201364215Y (en) | Friction moment measuring device of bearing under different axial loads and rotating speed | |
| CN201497602U (en) | Friction moment measurement device of bearing | |
| CN106324499A (en) | Dynamic performance test device for linear rotating motor and testing method | |
| CN206581119U (en) | A kind of Road surface level instrument | |
| CN106092441A (en) | A kind of simulator stand measuring dynamic balancing data | |
| CN200941071Y (en) | Friction moment measurer for microload and different speed of bearing | |
| CN103175454A (en) | Portable centering frame for fixing dial indicator | |
| US5461791A (en) | Apparatus and method for rotationally positioning a rotor | |
| CN207114093U (en) | A kind of hydraulic dynamometer measures calibration system | |
| CN203376110U (en) | Torque verification device of torque sensor | |
| CN102426072B (en) | Moment testing machine of permanent magnet transmission system and method thereof | |
| CN202267558U (en) | Permanent magnet transmission system torque testing machine | |
| US4235092A (en) | Low friction bearing running torque measuring apparatus | |
| CN105424245A (en) | Torque and rotation speed measurement device of anti-falling safety device | |
| CN213688752U (en) | Bearing rotating torque measuring device | |
| CN102735205B (en) | Elliptical type weight suspended cable declination angle measuring device for flow measurement of hydrometric cableway | |
| CN208313176U (en) | The numerical control measuring device of assembling angular contact ball bearing projection amount | |
| CN201464091U (en) | Acting force measuring device for exercise equipment | |
| CN207248524U (en) | A kind of sliding bear experiment device | |
| CN201425567Y (en) | Abrasive resistance tester for hard alloys | |
| CN215766851U (en) | Crankshaft crank neck parallelism detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: NINGBO CIXING BEARING CO., LTD. Assignor: Cixing Group Co., Ltd. Contract fulfillment period: 2008.12.13 to 2013.12.12 contract change Contract record no.: 2008330002612 Denomination of invention: Measuring for friction torque of bearing under micro-loading at different rotation rate and measuring apparatus therefor Granted publication date: 20080514 License type: Exclusive license Record date: 20081215 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.12.13 TO 2013.12.12; CHANGE OF CONTRACT Name of requester: NINGBO CIXING BEARING CO., LTD. Effective date: 20081215 |