CN102175369B - Friction torque testing device for rolling bearing at low temperature - Google Patents
Friction torque testing device for rolling bearing at low temperature Download PDFInfo
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- CN102175369B CN102175369B CN2011100436784A CN201110043678A CN102175369B CN 102175369 B CN102175369 B CN 102175369B CN 2011100436784 A CN2011100436784 A CN 2011100436784A CN 201110043678 A CN201110043678 A CN 201110043678A CN 102175369 B CN102175369 B CN 102175369B
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- rolling bearing
- bearing
- friction torque
- low temperature
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Abstract
The invention relates to a friction torque testing device for a rolling bearing at low temperature. The friction torque testing device comprises a support and a pair of objective rolling bearings of same type, wherein the pair of objective rolling bearings of same type is mounted at two ends of a shaft so as to be placed in a sleeve, two ends of the sleeve are respectively located by a left end cover and a right end cover so as to be fixed on the support, and a temperature sensor is placed in a part of the sleeve near a drilling part of the objective rolling bearing so as to test the temperature variation of the bearing; an extending end of the shaft fixes a balance wheel through two set screws, two ends of each set screw are provided with two balance nuts to fine adjust the eccentricity of the balance wheel; a string comes around the balance wheel, and two trays are respectively hung on the two ends of the string; when weights are placed in the trays, a starting friction torque of the objective rolling bearing can be tested as soon as the balance wheel turns. The friction torque testing device for the rolling bearing at low temperature can effectively control certain pre-tightening force to test performance indexes of the friction torque of the bearing with different lubricants under different radial loads at low temperature; and the friction torque testing device is simple in structure, low in manufacturing cost and convenient to operate, and can repeatedly test the friction torque at harsh low temperature.
Description
Technical field
The present invention relates to the bearings with rolling contact field, be specially the friction torque test device of rolling bearing under a kind of low temperature.
Background technology
Rolling bearing is a kind of assembly of supporting rotating shaft, is widely used in the every field of mechanical industry.Moment of friction is crucial performance index of bearing, and on the big equipment such as space flight and aviation of some temperature variation, the size of bearing frictional torque and undulatory property not only influence the transmission of system capacity, also affects the accuracy that system signal transmits.Friction torque testing instrument is of a great variety under the normal temperature; Be furnished with various control system, structure is comparatively complicated, it is placed under the rigorous environment temperature conditions make an experiment; With high costs; Especially different lubricants need a large amount of revision tests to tests such as moment of friction influences under the test for low temperature, and difference variation is prone to reduce the testing tool precision repeatedly, even damage testing tool.This is proposed a kind of easy device, realize under the harsh low temperature environment temperature guaranteeing to measure at every turn under identical pretightning force, can change radial load, different lubricants influences performance to moment of friction and carries out the repetition test analysis.
Summary of the invention
The objective of the invention is to be defective, the friction torque test device of rolling bearing under a kind of low temperature is provided to the prior art existence.Realize the starting friction moment properties test of rolling bearing under the low temperature environment temperature, for achieving the above object, design of the present invention is:
Do not consider zero frictions but baroque support system such as air bearing; Measured bearing promptly is used for supporting revolving shaft, again as unique load, has only the moment of friction that overcomes bearing when rotating torque; Rotating shaft just can be rotated, and utilizes lever principle to try to achieve the moment of friction of bearing.Some test macros often require bearing that certain rigidity is arranged, and need certain pretightning force, and different pretightning forces can make the moment of friction value different, and for this reason, each measurement all will guarantee the pretightning force of identical size.Because of measured bearing is a rolling bearing, moment of friction is very little, and the friction of other contact position will be far smaller than the moment of friction of rolling bearing, can have fine tuning structure to compensate for inevitable systematic error in measuring, and measured value is more accurate.The temperature variation of bearing can be measured accurately, but will avoid infiltrating impurity as far as possible.
According to the foregoing invention design, reach goal of the invention through following technical scheme:
The friction torque test device of rolling bearing under a kind of low temperature comprises a bearing and a pair of homotype
Number tested rolling bearing is characterized in that the tested rolling bearing of said a pair of same model is installed in the two ends of an axle and puts into a sleeve, and left end cap is used at two ends respectively; Right end cap locates and is fixed on the said bearing; Holing near tested rolling bearing place of said sleeve put into temperature sensor to measure this bearing temperature variation, and the external part of said axle is with the fixing balance wheel of two holding screws, and these holding screw two ends are equipped with the off-centre of two balance nuts fine setting balance wheels; Balance wheel walked around by cord and a pallet is respectively hung at two ends; When counterweight is put into this pallet, balance wheel is in case rotate, and the starting friction moment of tested rolling bearing just can record.
Said tested rolling bearing inner ring and axle wringing fit; Outer ring and the loose fit of sleeve inner ring are convenient to dismounting and are not destroyed bearing accuracy, and matching surface requires correct grinding; The right alignment of two mating surfaces of sleeve inner ring and axle requires high, guarantees that two tested rolling bearings are installed on the same straight line.
A spring, a spring base and an inner shield ring are arranged in the said left end cap; In the end groove, an end is on spring base, and is gapped between spring and the left end cap inwall in left end cap for spring one end; The length of spring is set according to pretightning force; Spring base one end has tapering, and the gathering sill origination point contact through inner shield ring evenly is applied to pretightning force on the left end measured bearing; The right end cap end face fine-grinding is screwed at the sleeve right-hand member.
Said near tested rolling bearing, to locate boring and put into temperature sensor, boring can not be communicated with tested rolling bearing, prevents dust as far as possible, and water vapor gets into bearing internal influence bearing lubricant performance and moment of friction value; The external digital indicator reading numerical values of temperature sensor.
Said two carry a tray can increase the identical weight counterweight simultaneously and apply radial load, and balance wheel is wanted as close as possible tested axis of rolling socket end, reduces torque influence as far as possible.
Whole testing device is placed in the cold control case; In cooling and test process, cold control case is opened all the time, guarantees its cooling requirement; In time absorb airborne water vapor and prevent that bearing from freezing, when not reaching the bearing lubricant solidifying point, can not get into water vapor influence test.
The present invention has following significant advantage compared with prior art:
The present invention is simple in structure, and is cheap for manufacturing cost, simple to operate, can realize cooling rapidly, under the low temperature of harshness, sample carried out a large amount of revision tests.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the tube-in-tube structure synoptic diagram of band temperature sensor among the present invention;
Fig. 3 is the structural representation of axis of the present invention and the combination of tested rolling bearing;
Fig. 4 is the structural representation of left end cap spring pretightening mechanism among the present invention;
Fig. 5 is the eccentric structural representation of adjustment wheel among the present invention;
Fig. 6 is the structural representation of balance wheel among the present invention.
Embodiment
The preferred embodiments of the present invention combine detailed description of the drawings following:
Embodiment one:
Ginseng Fig. 1; The friction torque test device of rolling bearing under this low temperature; Comprise a bearing (2) and the tested rolling bearing of a pair of same model (12); It is characterized in that the tested rolling bearing of said a pair of same model (12) to be installed in the two ends of an axle (10) and put into a sleeve (9), two ends are used left end cap (7) right end cap (13) to locate respectively and are fixed on the said bearing (2), the locating boring near tested rolling bearing (12) and put into temperature sensor (3) and change to measure this bearing temperature of said sleeve (9); The external part of said axle (10) is with the fixing balance wheel (14) of two holding screws (15); This holding screw (15) two ends are equipped with the off-centre of two balance nuts (16) fine settings balance wheels (14), and cord is walked around balance wheel (14) and a pallet (17) is respectively hung at two ends, when counterweight (18) is put into this pallet (17); Balance wheel (14) in a single day rotates, and the starting friction moment of tested rolling bearing (12) just can record.
Embodiment two:
Present embodiment and embodiment one are basic identical, and more concrete detailed structure is following:
Present embodiment is: referring to Fig. 1; The friction torque test device of rolling bearing under this low temperature comprises the cold control case (1) that environment temperature is controlled, referring to Fig. 2; Sleeve boring is extremely near the bearing place; Temperature sensor PT100 (3) is sticked in the hole, the lead external digital indicator, displays temperature changes.Referring to Fig. 3, a pair of same model test rolling bearing (12) is installed in the two ends of said axle (10) with the special tooling of preparation, axle (10) and test bearing (12) wringing fit, and the shaft shoulder is located bearing, and shaft shoulder height is lower than bearing inner race rib size.
Said apparatus is put into sleeve (9), and dismounting is convenient in test bearing (12) outer ring and said sleeve (9) inner ring loose fit.Right end cap (13) is fastening with 4 screws (8), and right end cap (13) central through hole constitutes the cantilevered radial support to said rotating shaft.Referring to Fig. 4, the built-in groove of left end cap (7), spring (6) one ends are in the left end cap groove; One end is on spring base (5); Spring (6) is gapped with the left end cap inwall, and the length of spring is set according to pretightning force, and spring base (5) other end has tapering; Gathering sill origination point contact through inner shield ring (4) evenly is applied to pretightning force on the left end measured bearing (12).Tighten 4 screws (8) on the left end cap, can guarantee the pretightning force constant magnitude, and evenly be applied on the measured bearing.
Said apparatus is packed on the bearing (2), and is fixing with screw (11).Referring to Fig. 5 and Fig. 6; Lay balance wheel (14) at the cantilever end of axle (10); Two holding screws (15) are fixed on balance wheel (14) on the axle (10); With cord two equal in quality pallets (17) are suspended in the two ends of balance wheel (14), respectively are equipped with nut (16) on the holding screw (15), fine-tuning nut (16) position guarantees holding screw (15) horizontal equilibrium.Package unit is put into the cold control case of environment temperature (1), with tweezers counterweight (18) is put into pallet (17) gently, and whether observation balance wheel (14) rotates, and rotates amassing of back calculating counterweight (18) gravity and balance wheel (14) radius and is the moment of friction of two bearings.
Claims (7)
1. the friction torque test device of rolling bearing under the low temperature; Comprise a bearing (2) and the tested rolling bearing of a pair of same model (12); It is characterized in that the tested rolling bearing of said a pair of same model (12) to be installed in the two ends of an axle (10) and put into a sleeve (9); Two ends are used left end cap (7), right end cap (13) to locate respectively and are fixed on the said bearing (2); The locating boring near tested rolling bearing (12) and put into temperature sensor (3) and change of said sleeve (9) to measure this bearing temperature, the external part of said axle (10) is with the fixing balance wheel (14) of two holding screws (15), and this holding screw (15) two ends are equipped with the off-centre that two balance nuts (16) are finely tuned balance wheels (14); Balance wheel (14) walked around by cord and a pallet (17) is respectively hung at two ends; When counterweight (18) is put into this pallet (17), balance wheel (14) is in case rotate, and the starting friction moment of tested rolling bearing (12) just can record.
2. the friction torque test device of rolling bearing under the low temperature as claimed in claim 1; It is characterized in that: said tested rolling bearing (12) inner ring and axle (10) wringing fit; Outer ring and sleeve (9) inner ring loose fit is convenient to dismounting and is not destroyed bearing accuracy, and matching surface requires correct grinding; The right alignment of two mating surfaces of sleeve (9) inner ring and axle (10) requires high, guarantees that two tested rolling bearings (12) are installed on the same straight line.
3. the friction torque test device of rolling bearing under according to claim 1 or claim 2 the low temperature; It is characterized in that: a spring (6), a spring base (5) and an inner shield ring (4) are arranged in the said left end cap (7); In the end groove, an end is on spring base (5), and is gapped between spring (6) and left end cap (7) inwall in left end cap (7) for spring (6) one ends; The length of spring (6) is set according to pretightning force; Spring base (5) one ends have tapering, and the gathering sill origination point contact through inner shield ring (4) evenly is applied to pretightning force on the tested rolling bearing of left end (12); Right end cap (13) end face fine-grinding is screwed at sleeve (9) right-hand member.
4. the friction torque test device of rolling bearing under the low temperature as claimed in claim 1; It is characterized in that: saidly locate boring near tested rolling bearing (12) and put into temperature sensor (3); Boring can not be communicated with tested rolling bearing (12), prevents that as far as possible dust, water vapor from getting into bearing internal influence bearing lubricant performance and moment of friction value; The external digital indicator reading numerical values of temperature sensor (3).
5. the friction torque test device of rolling bearing under the low temperature as claimed in claim 1 is characterized in that: should guarantee that two holding screws (15) are at same horizontal level.
6. the friction torque test device of rolling bearing under the low temperature as claimed in claim 1; It is characterized in that: said two carry a tray (17) can increase the identical weight counterweight simultaneously and apply radial load; Balance wheel (14) is wanted as close as possible tested rolling bearing (12) end, reduces torque influence as far as possible.
7. like claim 1,2,3; The friction torque test device of rolling bearing under 4,5,6 any described low temperature; It is characterized in that: whole testing device is placed in the cold control case (1), and in cooling and test process, cold control case (1) is opened all the time; Guarantee its cooling requirement, in time absorb airborne water vapor and prevent that bearing from freezing, when not reaching the bearing lubricant solidifying point, can not get into water vapor influence test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100436784A CN102175369B (en) | 2011-02-24 | 2011-02-24 | Friction torque testing device for rolling bearing at low temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100436784A CN102175369B (en) | 2011-02-24 | 2011-02-24 | Friction torque testing device for rolling bearing at low temperature |
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| CN102175369A CN102175369A (en) | 2011-09-07 |
| CN102175369B true CN102175369B (en) | 2012-07-04 |
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| CN2011100436784A Expired - Fee Related CN102175369B (en) | 2011-02-24 | 2011-02-24 | Friction torque testing device for rolling bearing at low temperature |
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| EP3835749A4 (en) * | 2018-08-06 | 2022-04-27 | Zhejiang Ute Bearing Co., Ltd | Integrated bearing seat capable of accurately detecting operating condition of bearing |
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| CN102607749B (en) * | 2012-03-23 | 2014-03-12 | 西安交通大学 | Device for measuring friction moment of roller bearing |
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| 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 |
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