The friction and wear mechanism of O-rings in magnetorheological damper: Numerical and experimental study

초록

In this paper, the friction and wear mechanisms of O-ring, commonly used sealing element of magnetorheological damper, were revealed, which has reference significance for seal design, fault diagnosis and life prediction of damper. A series of models of frictional force were established, through calculation and analysis, it was found that the piston rod velocity, particle size and particle mass fraction have certain rules that affect the friction coefficient and the film thickness. Subsequently, the friction and wear test bench of the sealing element of the magnetorheological damper was built, verifying the correctness of the theoretical model. In addition, through the observation of O-rings after the tests under different experimental conditions, the wear mechanism of O-ring is mainly abrasive wear.

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