CN2802484Y - Device for measuring microload friction of bearing - Google Patents
Device for measuring microload friction of bearing Download PDFInfo
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- CN2802484Y CN2802484Y CN 200520102383 CN200520102383U CN2802484Y CN 2802484 Y CN2802484 Y CN 2802484Y CN 200520102383 CN200520102383 CN 200520102383 CN 200520102383 U CN200520102383 U CN 200520102383U CN 2802484 Y CN2802484 Y CN 2802484Y
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- bearing
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- friction
- measuring disk
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Abstract
The utility model discloses a device for measuring the micro-load friction of a bearing. A measuring frame comprises an extension arm, a measuring disc, a loading force screw bolt, a measured bearing and a baffle plate, wherein the measured bearing is arranged in a measuring disc hole of the measuring frame, the measuring frame is exerted with the load from the upper side by using the upward force, the self gravity of the measuring frame is suspended on a rotating shaft and is balanced, and the micro-load measurement is realized. An angle which is generated after the friction and the asymmetrical pulling force are balanced is amplified into the perpendicular displacement of the end part of the extension arm under the action of a lever, a non-contact type sensor is used, and the accurate measurement of the friction and the friction coefficient of a sliding bearing and a rolling bearing is realized. The utility model can measure the real friction state of a radial bearing with the micro-load, and has the obvious advantages of researching the characteristics of opening and closing of the bearing, the real lubrication effect of the bearing, the sliming effect of the bearing, etc. The utility model has the judgment value for the development or the checking of the novel bearing and the lubricant.
Description
Technical field
The utility model relates to the measurement of moment, is specifically related to a kind of friction force of bearing under tiny load measurement mechanism.
Background technology
The measuring method of friction has many kinds, but in any case, all be unable to do without the measurement of two parameters, i.e. pressure and friction force.For the situation of transverse bearing under the tiny load condition, friction force measurement difficulty is 2 points: the instability of friction force, this instability are often relevant with bearing capacity, rotating speed and structure; Small friction force is difficult to measure with common method.So measure the friction force under the transverse bearing tiny load, must find a kind of accurate measurement method of friction force.
Summary of the invention
The purpose of this utility model is to provide a kind of friction force of bearing under tiny load measurement mechanism.
The technical scheme that its technical matters that solves the utility model adopts is:
Tiny load can be guaranteed, and promptly obtains radial load substantially and approaches zero loading, realizes the condition of tiny load friction.For the realization of tiny load condition, concrete solution is as follows: load from direction straight up, with the weight of loading force equalizer bearing itself and measurement bay, realize tiny load.
One, friction force of bearing under tiny load measuring method:
1) its method of measuring friction force is for utilizing lever principle, between tested sliding bearing and the rotating shaft or the moment of friction between the tested rolling bearing Internal and external cycle be converted to rotational angle by the measurement bay that is suspended on the rotating shaft, after the pulling force balance that loads the force, its rotational angle can keep balance, and this rotational angle and moment of friction keep linear approximate relationship in low-angle＜5 °, make error be no more than 5 ‰;
2) from the top loading force, load the line of force and be connected on the pulley, utilize its force direction conversion, realize loading;
What 3) measure that friction force relies on is to be suspended in the rotational angle that produces after the moment of friction of the measurement bay in the rotating shaft and the loading moment balance;
4) two arms are stretched out in the measurement bay end, one of them arm is laid the position sensing system that comprises PSD position transducer and laser instrument, utilize PSD position transducer moving with respect to static laser facula, the variation of measurement bay rotational angle relies on the vertical displacement of the measurement point of cantilever, its displacement numerical value and jib-length, be the distance of rotating shaft core, calculate the anglec of rotation, the displacement that promptly utilizes the lever amplification to be caused to sensor.
When rotational angle＜5 °, measure equation is as follows:
In the formula: μ-friction factor; The N-rotating shaft is to the pressure of bearing, N=|P-G|; The P-loading force; G-measurement bay weight; Rotational angle under θ-Frotteurism; R-loading force application point is to the distance at measurement bay center; R-rotating shaft radius; The displacement that l-measures; The s-displacement transducer is to the distance at measurement bay center.The error of this formula under ° situation of angle θ＜5 is no more than 5 ‰, can meet the demands fully.
Two, friction force of bearing under tiny load measurement mechanism can be divided into following two kinds:
1, bush(ing) bearing friction measurement device: measurement bay comprises extension arm, measuring disk, loading force bolt, tested sliding bearing, baffle plate.Tested sliding bearing is placed in the measuring disk hole of measurement bay, tested sliding bearing and measuring disk hole are wringing fit, tested sliding bearing and rotating shaft are clearance fit, two baffle plates are pressed in two end faces of tested sliding bearing respectively, measurement bay is suspended in the rotating shaft, the loading force bolt is housed on the measuring disk face of cylinder, have aperture in the loading force bolt, an end that loads the line of force passes the aperture location of loading force bolt, the other end of the loading line of force is walked around pulley and is carried the lotus counterweight, be positioned on the measuring disk face of cylinder that loads the line of force both sides extension arm is housed respectively, lay the position sensing system that comprises PSD position transducer and laser instrument on the extension arm.
2, annular bearing with rolling contact friction measurement device: measurement bay comprises extension arm, measuring disk, loading force bolt, tested rolling bearing, baffle plate.Tested rolling bearing is placed in the measuring disk hole of measurement bay, tested housing washer and measuring disk hole are wringing fit, tested rolling bearing inner ring and rotating shaft are wringing fit, two baffle plates are pressed into two end faces of tested rolling bearing respectively, the baffle plate internal diameter is greater than the inner ring maximum gauge, measurement bay is suspended in the rotating shaft, the loading force bolt is housed on the measuring disk face of cylinder, have aperture in the loading force bolt, an end that loads the line of force passes the aperture location of loading force bolt, the other end of the loading line of force is walked around pulley and is carried the lotus counterweight, be positioned on the measuring disk face of cylinder that loads the line of force both sides extension arm is housed respectively, lay the position sensing system that comprises PSD position transducer and laser instrument on the extension arm.
The useful effect that the utlity model has is:
By certain any displacement on the arm that measure to amplify length, make the friction angle also can be measured accurately; The balance cancellation weight influence of bearing itself and measurement bay, can realize the measurement under the tiny load situation; Use non-contacting sensor, realized the friction force of sliding bearing and rolling bearing and the accurate measurement of friction factor.This method can be measured under the small load real transverse bearing Frotteurism, to the open and shut characteristic of research bearing, truly lubricated and stick-slip effect etc. has remarkable advantages.The exploitation of novel bearing and lubricant or the judge that has of detection are worth.
Description of drawings
Fig. 1 is a friction measurement synoptic diagram of the present utility model;
Fig. 2 is the dynamic balance synoptic diagram of measurement of the present utility model;
Fig. 3 is a structural principle synoptic diagram of the present utility model;
Fig. 4 is a measurement bay isometric cutaway view of the present utility model;
Fig. 5 is a loading force bolt isometric cutaway view of the present utility model.
Among the figure: 1, extension arm, 2, measurement bay, 3, rotating shaft, 4, position sensing system (comprising PSD position transducer and laser instrument), 5, load counterweight, 6, load the line of force, 7, pulley, 8, measuring disk, 9, loading force bolt, 10, tested sliding bearing, 11, baffle plate, 12, aperture.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Be the friction measurement synoptic diagram as shown in Figure 1 and Figure 2, its measuring process is as follows:
1) its method of measuring friction force is for utilizing lever principle, between tested sliding bearing and the rotating shaft or the moment of friction between the tested rolling bearing Internal and external cycle be converted to rotational angle by the measurement bay that is suspended on the rotating shaft, after the pulling force balance that loads the force, its rotational angle can keep balance, and this rotational angle and moment of friction keep linear approximate relationship in low-angle＜5 °, make error be no more than 5 ‰;
2) from the top loading force, load the line of force and be connected on the pulley, utilize its force direction conversion, realize loading;
What 3) measure that friction force relies on is to be suspended in the rotational angle that produces after the moment of friction of the measurement bay in the rotating shaft and the loading moment balance;
4) two arms are stretched out in the measurement bay end, one of them arm is laid the position sensing system that comprises PSD position transducer and laser instrument, utilize PSD position transducer moving with respect to static laser facula, the variation of measurement bay rotational angle relies on the vertical displacement of the measurement point of cantilever, its displacement numerical value and jib-length, be the distance of rotating shaft core, calculate the anglec of rotation, the displacement that promptly utilizes the lever amplification to be caused to sensor.
When rotational angle＜5 °, measure equation is as follows:
In the formula: μ-friction factor; The N-rotating shaft is to the pressure of bearing, N=|P-G|; The P-loading force; G-measurement bay weight; Rotational angle under θ-Frotteurism; R-loading force application point is to the distance at measurement bay center; R-rotating shaft radius; The displacement that l-measures; The s-displacement transducer is to the distance at measurement bay center.The error of this formula under ° situation of angle θ＜5 is no more than 5 ‰, can meet the demands fully.
As Fig. 3, Fig. 4, shown in Figure 5, be the bush(ing) bearing friction measurement device, wherein:
The annular bearing with rolling contact friction measurement device, structure is the same substantially with the bush(ing) bearing friction measurement device, just has any different on the clamping to bearing, do not figure in addition, wherein:
Can adopt wringing fit for sliding bearing 10 and housing washer, to guarantee the rigidity of measurement bay 2, the extension arm 1 of measurement bay 2 wherein an end lay the position sensing system 4 that comprises PSD position transducer and laser instrument, with the perpendicular displacement l that measures after the anglec of rotation that friction causes in its end points.By the parameter of l value and other (measurement bay weight G loads the distance R of force to the axle center, displacement transducer to the axle center apart from s etc.) can determine the size of friction factor.Measurement bay inside as shown in Figure 4, regulate measurement range for convenience, the place of laying at loading force bolt 9 has designed helicitic texture, make that R can be adjusted, thereby make and also can measure bigger friction, expansion measurement range that can be suitable is as at a high speed and under the bigger lubricant situation of viscosity.Load the force as shown in Figure 5, aperture 12 of design on the axis of loading force bolt 9, its diameter is no more than 0.05mm, and such design can guarantee to load the stability in force.
This method is applicable to transverse bearing or has the rub measurement that rotatablely moves under tiny load or little load condition.Its with balance method cancellation the weight influence of bearing itself and measurement bay, can realize the measurement under the tiny load situation, the use non-contacting sensor has been realized the accurate measurement of friction force and friction factor.
Above-mentioned embodiment is used for the utility model of explaining; rather than the utility model limited; in the protection domain of spirit of the present utility model and claim, any modification and change to the utility model is made all fall into protection domain of the present utility model.
Claims (2)
1, a kind of friction force of bearing under tiny load measurement mechanism is characterized in that: measurement bay (2) comprises extension arm (1), measuring disk (8), loading force bolt (9), tested sliding bearing (10), baffle plate (11); Tested sliding bearing (10) is placed in measuring disk (8) hole of measurement bay (2), tested sliding bearing (10) is a wringing fit with measuring disk (8) hole, tested sliding bearing (10) is a clearance fit with rotating shaft (3), two baffle plates (11) are pressed in (10) two end faces of tested sliding bearing respectively, measurement bay (2) is suspended in the rotating shaft (3), measuring disk (8) is equipped with loading force bolt (9) on the face of cylinder, have aperture (12) in the loading force bolt (9), an end that loads the line of force (6) passes aperture (12) location of loading force bolt (9), the other end of the loading line of force (6) is walked around pulley (7) and is carried lotus counterweight (5), be positioned on measuring disk (8) face of cylinder that loads the line of force (6) both sides extension arm (1) is housed respectively, lay the position sensing system (4) that comprises PSD position transducer and laser instrument on the extension arm.
2, a kind of friction force of bearing under tiny load measurement mechanism is characterized in that: measurement bay (2) comprises extension arm (1), measuring disk (8), loading force bolt (9), tested rolling bearing, baffle plate (11); Tested rolling bearing is placed in measuring disk (8) hole of measurement bay (2), tested housing washer and measuring disk (8) hole is a wringing fit, tested rolling bearing inner ring and rotating shaft (3) are wringing fit, two baffle plates (11) are pressed into two end faces of tested rolling bearing respectively, baffle plate (11) internal diameter is greater than the inner ring maximum gauge, measurement bay (2) is suspended in the rotating shaft (3), measuring disk (8) is equipped with loading force bolt (9) on the face of cylinder, have aperture (12) in the loading force bolt (9), an end that loads the line of force (6) passes aperture (12) location of loading force bolt (9), the other end of the loading line of force (6) is walked around pulley (7) and is carried lotus counterweight (5), be positioned on measuring disk (8) face of cylinder that loads the line of force (6) both sides extension arm (1) is housed respectively, lay the position sensing system (4) that comprises PSD position transducer and laser instrument on the extension arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520102383 CN2802484Y (en) | 2005-05-24 | 2005-05-24 | Device for measuring microload friction of bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520102383 CN2802484Y (en) | 2005-05-24 | 2005-05-24 | Device for measuring microload friction of bearing |
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| Publication Number | Publication Date |
|---|---|
| CN2802484Y true CN2802484Y (en) | 2006-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520102383 Expired - Lifetime CN2802484Y (en) | 2005-05-24 | 2005-05-24 | Device for measuring microload friction of bearing |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1321321C (en) * | 2005-05-24 | 2007-06-13 | 浙江大学 | Method and device for measuring friction force of bearing under tiny load |
| CN102759425A (en) * | 2012-06-29 | 2012-10-31 | 北京市三一重机有限公司 | Torque measuring device |
| CN104180992A (en) * | 2014-09-18 | 2014-12-03 | 天津电气科学研究院有限公司 | Measuring method for vertical type hydrostatic bearing sensitivity |
| CN110470473A (en) * | 2019-09-23 | 2019-11-19 | 河海大学常州校区 | A kind of water lubriucated bearing experimental rig |
-
2005
- 2005-05-24 CN CN 200520102383 patent/CN2802484Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1321321C (en) * | 2005-05-24 | 2007-06-13 | 浙江大学 | Method and device for measuring friction force of bearing under tiny load |
| CN102759425A (en) * | 2012-06-29 | 2012-10-31 | 北京市三一重机有限公司 | Torque measuring device |
| CN104180992A (en) * | 2014-09-18 | 2014-12-03 | 天津电气科学研究院有限公司 | Measuring method for vertical type hydrostatic bearing sensitivity |
| CN104180992B (en) * | 2014-09-18 | 2016-08-24 | 天津电气科学研究院有限公司 | A kind of measuring method of vertical hydrostatic bearing sensitivity |
| CN110470473A (en) * | 2019-09-23 | 2019-11-19 | 河海大学常州校区 | A kind of water lubriucated bearing experimental rig |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20050524 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |