CN106441898B - A kind of test device of rolling bearing rotating accuracy - Google Patents
A kind of test device of rolling bearing rotating accuracy Download PDFInfo
- Publication number
- CN106441898B CN106441898B CN201610957481.4A CN201610957481A CN106441898B CN 106441898 B CN106441898 B CN 106441898B CN 201610957481 A CN201610957481 A CN 201610957481A CN 106441898 B CN106441898 B CN 106441898B
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- bearing
- displacement sensor
- mandrel
- hinge mechanism
- flexible hinge
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
一种滚动轴承回转精度的测试装置，包括设置在支撑台面上的参考主轴，参考主轴上设置有芯轴，芯轴的上部分位于轴承盖内侧，芯轴上部分的外周面与轴承盖的内周面通过待测轴承相连接，参考主轴的上端面设置有位移传感器支架，芯轴位于位移传感器支架内侧，位移传感器支架上方通过柔性铰链固定板设置有二自由度柔性铰链机构，轴承盖固定在二自由度柔性铰链机构的底端面中心上，位移传感器支架上对应轴承盖的外周面设置有用于测量轴承盖水平位移的电容位移传感器，二自由度柔性铰链机构的上端面上设置有用于向待测轴承施加预紧力的并同时测量预紧力大小的竖向施力测量装置。本发明可以在不同轴承预紧力、不同转速和载荷条件下，测试轴承的回转精度，分析测试数据。
A test device for the rotation accuracy of a rolling bearing, comprising a reference spindle arranged on a support table, a mandrel is arranged on the reference spindle, the upper part of the mandrel is located inside the bearing cap, the outer peripheral surface of the upper part of the mandrel and the inner periphery of the bearing cap The surface is connected by the bearing to be tested, the upper end face of the reference spindle is provided with a displacement sensor bracket, the mandrel is located inside the displacement sensor bracket, a two-degree-of-freedom flexible hinge mechanism is set above the displacement sensor bracket through the flexible hinge fixing plate, and the bearing cover is fixed on the two On the center of the bottom end face of the degree of freedom flexible hinge mechanism, the outer peripheral surface of the displacement sensor bracket corresponding to the bearing cap is provided with a capacitive displacement sensor for measuring the horizontal displacement of the bearing cap. A vertical force measuring device that applies preload on the bearing and measures the preload at the same time. The invention can test the rotation accuracy of the bearing under different bearing pre-tightening force, different rotational speed and load conditions, and analyze the test data.
Description
Technical field
The present invention relates to a kind of bearing testing devices.More particularly to a kind of test device of rolling bearing rotating accuracy.
Background technique
Rolling bearing is one of the important spare part for turning round class mechanical equipment, its performance directly affects the property of equipment
Energy.The changing rule for studying the factors such as rotating accuracy and the running environment of main shaft determines that main shaft is best pre- under different operating conditions
Clamp force helps to improve the machining accuracy of main shaft.In order to meet the requirement of high-speed, high precision, the requirement to bearing accuracy is also gradually
It improves.However, first having to test its precision to study bearing accuracy.If bearing is placed in main shaft
It tests, test result will receive influence from the other error components of main shaft, for example the deviation from circular from of test ball, main shaft is inclined
Heart error etc..The turn error of bearing can be coupled with the deviation from circular from of main shaft axle journal and bearing hole, be difficult to separate.Institute
With to accurately measure rotating accuracy of the bearing under different pretightning forces, different lubricating conditions, bearing must be in simulation operating condition
Test device on, individually tested and analyzed.Currently, structure is complicated for most of bearing testing device, measuring accuracy is low,
Practical application value is smaller.
Summary of the invention
The technical problem to be solved by the invention is to provide one kind can be in different bearing pre-fastenings, different rotating speeds and load
Under the conditions of lotus, the rotating accuracy of test bearing analyzes the test device of the rolling bearing rotating accuracy of test data.
The technical scheme adopted by the invention is that: a kind of test device of rolling bearing rotating accuracy, including setting are being propped up
Support reference the main shaft on table top, it is described with reference to being provided with mandrel on main shaft, the top quartile of the mandrel in bearing cap inside, and
And the outer peripheral surface of part is connected with the inner peripheral surface of the bearing cap by bearing to be measured on the mandrel, it is described to refer to main shaft
Upper surface be provided with displacement sensor bracket, the mandrel is located on the inside of the displacement sensor bracket, the displacement sensing
Two degrees of freedom flexure hinge mechanism is provided with by flexible hinge fixed plate above device bracket, the bearing cap is fixed on described two
On the bottom face center of freedom degree flexure hinge mechanism, the outer peripheral surface that the bearing cap is corresponded on the displacement sensor bracket is set
The capacitance displacement sensor for measuring bearing cap horizontal displacement is equipped with, on the upper surface of the two degrees of freedom flexure hinge mechanism
It is provided with for applying pretightning force to bearing to be measured and measure the vertical force measuring device of pretightning force size simultaneously.
The capacitance displacement sensor includes X to capacitance displacement sensor and Y-direction capacitance displacement sensor.
The two degrees of freedom flexure hinge mechanism includes frame, and symmetrical is integrally formed in the frame inner periphery
Four structures it is identical concatenate the first axle mechanism formed by two semicircle hook hinge structures, be formed in the frame
The fixed disk for being used to fix the bearing cap at center, the outer periphery of the fixed disk is respectively by by a semicircle Hooke's hinge
Chain first axle mechanism described in the first axle mechanism integrally connected four being configured to.
The counterbore for fixing the bearing cap is formed in the fixed disk.
The vertical force measuring device includes: the load cylinder on air cylinder support, the load cylinder is arranged in
Cylinder rod bottom end force snesor is connected by force snesor pedestal through air cylinder support, be connected on the force snesor and institute
The central part for stating two degrees of freedom flexure hinge mechanism is the loading head of Hertz contact.
The upper end of the loading head is that helicitic texture is used to the force snesor be threaded connection, and lower end is spherical structure
For the central part Hertz contact with the two degrees of freedom flexure hinge mechanism.
The lower part of the air cylinder support is fixed on the shell with reference to main shaft.
A kind of test device of rolling bearing rotating accuracy of the invention, can be in different bearing pre-fastenings, different rotating speeds
Under load-up condition, the rotating accuracy of test bearing is analyzed test data, is studied the bearing accuracy under different operating conditions,
Foundation is provided for geometric parameter and the running parameter determination of bearing.The advantages and positive effects of the present invention are:
1) pretightning force is applied to bearing to be measured by load cylinder, and the big of pretightning force is accurately measured by force snesor
It is small, actual condition can be simulated, rotating accuracy of the bearing to be measured under different pretightning forces is measured；
2) by the bearing inner race rotation to be measured of the reference main shaft drives of high precision high rigidity, pass through two degrees of freedom flexible hinge
Mechanism prevents the outer ring of bearing to be measured from rotating with inner ring, can prevent the influence of other deviation from circular froms, does not have to carry out error separate；
3) displacement data is measured by the capacitance displacement sensor of nanometer resolution, certainly by bearing radial rigidity and two
Correction factor is fitted by the rigidity of the X of degree flexure hinge mechanism, Y-direction, measured displacement data are modified, improves test
Precision.
Detailed description of the invention
Fig. 1 is a kind of overall structure diagram of the test device of rolling bearing rotating accuracy of the present invention；
Fig. 2 is a kind of cut-away view of the test device primary structure of rolling bearing rotating accuracy of the present invention；
Fig. 3 is capacitance displacement sensor distribution schematic diagram in the present invention；
Fig. 4 is the structural schematic diagram of two degrees of freedom flexure hinge mechanism in the present invention；
Fig. 5 is a kind of the first isoboles of rigidity of the test device of rolling bearing rotating accuracy of the present invention；
Fig. 6 is a kind of the second isoboles of rigidity of the test device of rolling bearing rotating accuracy of the present invention.
In figure
1: load cylinder 2: air cylinder support
3: force snesor pedestal 4: force snesor
5: loading head 6: two degrees of freedom flexure hinge mechanism
6-1: frame 6-2: first axle mechanism
6-3: fixed disk 6-4: first axle mechanism
6-5: counterbore 7: bearing cap
8: bearing 9 to be measured: capacitance displacement sensor
9-1:X is to capacitance displacement sensor 9-2:Y to capacitance displacement sensor
10: mandrel 11: flexible hinge fixed plate
12: displacement sensor bracket 13: referring to main shaft
Specific embodiment
It is made in detail below with reference to test device of the embodiment and attached drawing to a kind of rolling bearing rotating accuracy of the invention
Explanation.
As shown in Figure 1 and Figure 2, the test device of a kind of rolling bearing rotating accuracy of the invention, including be arranged in supporting table
Reference main shaft 13 on face, it is described to be placed vertically with reference to main shaft 13, mandrel 10, the mandrel are provided on the reference main shaft 13
10 top quartile in the inside of bearing cap 7, also, on the mandrel 10 outer peripheral surface of part and the bearing cap 7 inner peripheral surface
It is connected by bearing 8 to be measured, the inner ring for driving the bearing to be measured by the upper part of mandrel 10 with reference to main shaft 13
Rotation.The upper surface with reference to main shaft 13 is provided with displacement sensor bracket 12, and the mandrel 10 is located at the displacement sensing
On the inside of device bracket 12, two degrees of freedom flexible hinge is provided with by flexible hinge fixed plate 11 above the displacement sensor bracket 12
Chain mechanism 6, the bearing cap 7 are fixed on the bottom face center of the two degrees of freedom flexure hinge mechanism 6, the displacement sensing
Corresponded on device bracket 12 bearing cap 7 outer peripheral surface be provided with for measuring 7 horizontal displacement of bearing cap capacitive displacement sensing
Device 9 is provided on the upper surface of the two degrees of freedom flexure hinge mechanism 6 pretightning force and same for applying to bearing 8 to be measured
When measure pretightning force size vertical force measuring device.
As shown in figure 3, the capacitance displacement sensor 9 includes X to capacitance displacement sensor 9-1 and Y-direction capacitive displacement
Sensor 9-2.The capacitance displacement sensor 9 has nanometer resolution, and has the precision of very high test, test process
In, the capacitance displacement sensor 9 measures the circular runout of the bearing cap 7, position measured by the capacitance displacement sensor 9
It moves data and receives the influence of the two degrees of freedom flexure hinge mechanism 6, need the displacement data to X, Y-direction multiplied by ζXAnd ζYInto
Row amendment.X is obtained according to the stiffnes s equivalent map analysis of Fig. 5, Fig. 6, the displacement correction coefficient of Y-direction is respectively as follows:
Wherein, kXFor two degrees of freedom flexure hinge mechanism X to rigidity, kYY-direction for two degrees of freedom flexure hinge mechanism is rigid
Degree, kBFor the radial rigidity of bearing to be measured.
As shown in figure 4, the two degrees of freedom flexure hinge mechanism 6 includes frame 6-1, symmetrical is integrally formed in
Four structures of the frame 6-1 inner periphery are identical to concatenate the first axle machine formed by two semicircle hook hinge structures
Structure 6-2 is formed in the outer of the fixed disk 6-3, the fixed disk 6-3 for fixing the bearing cap 7 at the center the frame 6-1
Periphery passes through described in the first axle mechanism 6-4 integrally connected four that is formed as a semicircle hook hinge structure the respectively
One linkage 6-2.The counterbore 6-5 for fixing the bearing cap 7 is formed on the fixed disk 6-3.Described two are freely
Spending flexure hinge mechanism 6 has biggish rotational stiffness and lesser radial rigidity, and the fixed disk 6-3 of the center portion thereof point is can
Movable part can move in certain stroke, can also prevent the outer ring of the bearing to be measured 8 by moment of friction effect with
Inner ring rotation.
As shown in Figure 1, the vertical force measuring device includes: the load cylinder 1 on air cylinder support 2 is set,
The lower part of the air cylinder support 2 is fixed on the shell with reference to main shaft 13.Cylinder is run through in the cylinder rod bottom end of the load cylinder 1
Bracket 2 connects force snesor 4 by force snesor pedestal 3, is connected with and the two degrees of freedom flexible hinge on the force snesor 4
The central part of chain mechanism 6 is the loading head 5 of Hertz contact, and the load cylinder 1 controls its output pressure by regulating valve,
The load cylinder 1 exports pretightning force and can directly be measured by the force snesor 4.The upper end of the loading head 5 is helicitic texture
For being to be threadedly coupled with the force snesor 4, lower end is that spherical structure is used for and the two degrees of freedom flexure hinge mechanism 6
Central part Hertz contact.
A kind of working principle of the test device of rolling bearing rotating accuracy of the invention:
First bearing 8 to be measured is installed according to mode shown in Fig. 1 before test, the bolt of flexible hinge fixed plate 11 not twist
Tightly, it is loaded by loading cylinder 1, after the completion of load, tightens all bolts of flexible hinge fixed plate 11, sensed by power
Device 4 measures the size of applied pretightning force, and keeps pretightning force constant.
Rotation refers to main shaft 13, starts to test, the mandrel 10 connected with reference to main shaft 13 also can with rotation, and then drive to
The inner ring rotation for surveying bearing 8, due to the rigidity with higher of reference main shaft 13 and rotating accuracy, so the inner ring of bearing to be measured 8
Axis of rotation approximation it is motionless, if bearing to be measured 8, there are turn error, the outer ring of bearing 8 to be measured can generate radial bounce,
And the outer ring of bearing 8 to be measured is connected by bearing cap 7 with the central part fixed disk 6-3 of two degrees of freedom flexure hinge mechanism 6, two
Freedom degree flexure hinge mechanism 6 can Approximate Equivalent handled at spring, capacitance displacement sensor 9 measures the circular runout of bearing cap 7,
The circular runout of the outer ring of bearing 8 to be measured is namely measured, then measured displacement value is modified by correction factor, after amendment
Displacement be bearing 8 to be measured turn error.
Although the preferred embodiment of the present invention is described above in conjunction with attached drawing, the invention is not limited to upper
The specific embodiment stated, the above mentioned embodiment is only schematical, be not it is restrictive, this field it is common
Technical staff under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, may be used also
By make it is many in the form of, within these are all belonged to the scope of protection of the present invention.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610957481.4A CN106441898B (en) | 2016-10-27 | 2016-10-27 | A kind of test device of rolling bearing rotating accuracy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610957481.4A CN106441898B (en) | 2016-10-27 | 2016-10-27 | A kind of test device of rolling bearing rotating accuracy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106441898A CN106441898A (en) | 2017-02-22 |
| CN106441898B true CN106441898B (en) | 2019-05-31 |
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| CN201610957481.4A Expired - Fee Related CN106441898B (en) | 2016-10-27 | 2016-10-27 | A kind of test device of rolling bearing rotating accuracy |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106908235B (en) * | 2017-03-21 | 2019-03-26 | 哈尔滨工业大学 | A kind of experimental provision measuring micro- spray lubricating arrangement lubrication micro- amount of redundancy of oil spurts |
| CN109238706A (en) * | 2018-10-18 | 2019-01-18 | 东莞市国森科精密工业有限公司 | Tooling equipment for detecting rotation precision of crossed roller bearing |
| CN111855183B (en) * | 2020-07-29 | 2022-04-19 | 中国科学院光电技术研究所 | Multi-degree-of-freedom motion branched chain resolution testing platform and testing method |
| CN113740012A (en) * | 2021-10-09 | 2021-12-03 | 东莞青锐科技有限公司 | Foil rigidity testing equipment of foil air bearing |
| CN114700805B (en) * | 2022-04-21 | 2023-05-26 | 华中科技大学 | A kind of centering device based on the coaxiality of the ball head of the probe and the handle of the tool based on the contact probe |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3405235B2 (en) * | 1998-11-24 | 2003-05-12 | 日本精工株式会社 | Rotational accuracy and dynamic torque measuring device for radial rolling bearings |
| JP4517648B2 (en) * | 2003-05-22 | 2010-08-04 | 日本精工株式会社 | Load measuring device for rolling bearing units |
| CN101929918B (en) * | 2010-08-11 | 2012-05-09 | 洛阳轴研科技股份有限公司 | Simulation test method of rotating outer ring/fixing inner ring of rolling bearing |
| CN202133547U (en) * | 2011-01-07 | 2012-02-01 | 西安交通大学 | A high-precision measuring device for comprehensive performance of rolling bearings |
| CN104568443B (en) * | 2015-01-27 | 2017-05-03 | 四川大学 | Space rolling bearing comprehensive performance experiment device |
| CN105547697B (en) * | 2015-12-08 | 2017-12-22 | 东南大学 | A kind of ultrahigh speed rolling bearing performance tester |
| CN206683856U (en) * | 2016-10-27 | 2017-11-28 | 天津大学 | A kind of test device of rolling bearing rotating accuracy |
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