载荷波动工况下滚动轴承接触特性分析

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Abstract On the basis of considering the dynamic effect of bearing moving parts,the interaction between roller and cage was simulated by nonlinear spring,a dynamic analysis model of cylindrical roller bearing was established to research the internal contact characteristics of rolling bearing under variable load. The Runge-Kutta algorithm with fourth-order fixed step was used to solve the differential equations of motion. The contact characteristics between inner ring and roller and its influence law under variable amplitude and frequency, as well as the dynamic contact characteristics of cage under different forms of periodic fluctuating load were obtained.The results show that the collision between the roller and the front of cage occurred in load zone, reversely, the collision between the roller and the rear of cage occurred in non-load zone.With the increase of fluctuation amplitude, the contact force between roller and inner ring increases in load zone, but the influence is small when entering and leaving the load zone.Under the action of low-frequency load, the trajectory of inner ring centroid is relatively concentrated,with the increase of fluctuation frequency, the load of inner ring increases slowly,simultaneously,the inner ring tends to move upward.Under high frequency load the centroid trajectory of inner ring is disordered and dispersed and the contact between inner ring and roller is unstable,the inner ring vibrates in the vertical direction.When load fluctuates, the degree of collision between the roller and the front of cage intensifies. The peak value of cage collision force from large to small is square wave, sine wave, triangular wave and stable working condition.

Key words： rolling bearing load fluctuation cage dynamic contact dynamics

Received: 07 April 2022 Published: 28 June 2023

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	Articles by authors
	TU Wenbing
	WANG Jiaming
	YANG Benmeng
	LIANG Jie
	LUO Ya
	ZHANG Guiyuan

Cite this article:

TU Wenbing,WANG Jiaming,YANG Benmeng, et al. Analysis of contact characteristics of rolling bearings under load fluctuation[J]. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(12): 227-235.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2023/V42/I12/227

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