A fretting wear test device and wear calculation method for rolling bearings

Abstract

The invention discloses a rolling bearing fretting wear test device and a wear calculation method. The real rolling bearing is used as the test object, and the piezoelectric ceramic actuator is used as the power source. The power connector is transmitted to the torsion shaft, which promotes the torsional micro-motion of the inner raceway of the bearing, which is further transformed into a compound micro-motion mode of tangential, rolling and torsion between the bearing circumferential rolling body and the inner and outer raceways of the bearing. Set the measurement point at the appropriate position, use the measuring instrument to obtain the amount of fretting wear, and substitute it into the Archard model to obtain the wear coefficient. Finally, the fretting wear estimation model suitable for the working conditions and structural characteristics of the rolling bearing can be obtained. Compared with the prior art, the present invention has the advantages of reproducing the complex operating conditions of rolling bearing fretting wear, having the characteristics of large output, high frequency and high precision, and can be used for multi-faceted, batch-scale fretting wear tests, It can also be used for the determination of bearing fretting wear coefficient.

Description

technical field [0001] The invention relates to the technical field of mechanical wear, in particular to a fretting wear test device and a wear calculation method for rolling bearings. Background technique [0002] Fretting is an extremely small movement between two contacting surfaces, usually on the order of microns. These contact surfaces are usually static on a macroscopic scale, but imperceptible small reciprocating motions occur at the actual contact. According to the direction of relative motion between contact bodies, fretting wear is divided into four basic operation modes, namely: tangential type, radial type, rolling type and twisting type. Among them, tangential fretting is also called translational fretting, which is the most common fretting mode and the most commonly used form in fretting experiments. The repeated action of fretting wear on small parts will cause friction and wear on the contact surface, and then initiate fatigue cracks, reduce local fatigue ...

AI Technical Summary

Problems solved by technology

However, for the bearings in the clutch structural components, this scheme is quite different from the real working conditions of rolling bearings, and it is difficult to realize its high-frequency compound micro-motion form

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