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Measuring for friction torque of bearing under micro-loading at different rotation rate and measuring apparatus therefor

A friction torque and measuring instrument technology, used in force/torque/work measuring instruments, torque measurement, mechanical bearing testing, etc. Achieve the effect of small measurement error, few measurement items and high measurement accuracy

Active Publication Date: 2008-05-14
CIXING GROUP
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Problems solved by technology

After the measurement friction force is balanced by the friction moment of the measuring frame suspended on the rotating shaft and the loading moment, the generated rotation angle θ must be <5° to be calculated by the measurement formula and the error does not exceed 5%, so there are certain limitations. At the same time, it is also an indirect displacement measurement. There are many measured data and parameters, the operation is troublesome, the measurement accuracy is not high, and the friction torque at different speeds cannot be measured.

Method used

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  • Measuring for friction torque of bearing under micro-loading at different rotation rate and measuring apparatus therefor

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Embodiment Construction

[0018] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0019] Friction torque measurement method: a) Select the weight of the French yard when the bearing under test is at rest, hang a very thin nylon filament 6 in the middle of the outer diameter of the bearing, hang a French yard 5 on one end of the nylon filament 6, and hang the French yard 5 on the other end of the nylon filament connected to the force gauge. The weight of the French code 5 is to make the nylon filament 6 and the outer ring of the tested bearing 7 not have relative sliding as the criterion.

[0020] When the bearing under test is at rest, the tensile force of the French code 5 and the dynamometer 4 is balanced, and the displayed value A on the dynamometer 4 is 1 (Newton N), when the bearing under test rotates counterclockwise with the special mandrel, the inner ring of the bearing rotates at a predetermined speed driven by the...

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Abstract

The disclosed measuring apparatus and method for frictional moment comprise: the target bearing with diameter as D is suspended a segment nylon wire with ends connected to weight and dynamometer respectively, when bearing static, the show value on dynamometer as A1 balances to the weight; if rotating toward one direction by some rate, the show value increases to A2, and the formula M=(A2-A1) .D / 2 can express the corresponding frictional moment. This invention is reliable, simple, and well practical.

Description

technical field [0001] The invention relates to a method for measuring bearing friction torque and a device used therein, in particular to a bearing microload and different rotating speed friction torque measurement and measuring instrument. Background technique [0002] The method commonly used to measure the friction torque of small and medium bearings is the manual measurement method, that is, the bearing is placed on a rotating platform connected to the torque sensor. There are 4 cylinders on the rotating platform to clamp the outer ring of the bearing, and rotate it by hand and insert it into the bore of the inner ring of the bearing. The mandrel rotates and drives the outer ring to rotate through the inner ring, so that the indicating instrument connected to it can display the friction value of the bearing through the rotating platform and the torque sensor. This method rotates manually, not only the rotation speed is slow and uneven, but also The measurement error is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L3/00G01L5/00G01M13/04
Inventor 方正全邓木松郭为民
Owner CIXING GROUP
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