Analysis of Elastohydrodynamic Lubrication Friction of Rolling Element Bearing

doi:10.12068/j.issn.1005-3026.2015.07.019

Abstract

Abstract: Based on a set of full non-Newtonian elastohydrodynamic lubrication (EHL) point contact numerical simulation method， the steady and transient EHL characteristics at ball element and raceway elliptical contact in deep groove ball bearing were investigated. According to the results of film pressure and thickness， the effects of surface roughness， surface geometrical morphology (rough surface heights)， slide-to-roll ratio， contact load and rolling velocity on the friction coefficient of deep groove ball bearing were discussed. The results show that the effect of surface roughness on the friction coefficient is negligible， while different surface geometrical morphologies have weak influence on the friction coefficient. The friction coefficient increases with the increase of slide-to-roll ratio and the improvement of the contact force and rolling speed lead to the increase of the friction coefficient.

Key words: elastohydrodynamic lubrication, point contact, deep groove ball bearing, friction coefficient, surface roughness

CLC Number:

TH133.3

ZHANG Yu， XIE Li-yang， HU Zhi-yong， ZHANG Xiao-chen. Analysis of Elastohydrodynamic Lubrication Friction of Rolling Element Bearing[J]. Journal of Northeastern University Natural Science, 2015, 36(7): 1000-1004.

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