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http://dx.doi.org/10.9725/kstle.2011.27.6.326

EHL Analysis of Ball Bearing for Rough Surface With the FlowFactor  

Lee, Byung-Wook (Dept. of Mechanical Engineering, Pusan National University)
Moon, Seok-Man (Dept. of Mechanical Engineering, Pusan National University)
Kim, Tae-Wan (Dept. of Mechanical Engineering, PuKyong National University)
Cho, Yong-Joo (Dept. of Mechanical Engineering, Pusan National University)
Publication Information
Tribology and Lubricants / v.27, no.6, 2011 , pp. 326-331 More about this Journal
Abstract
The purpose of this paper is to analyze and discuss the effects of surface roughness by comparing the elastohydrodynamic lubrication(EHL) analysis of smooth surface and rough surface as the ball bearing. In order to do this, The average flow model is adapted for the interaction of the flow rheology of lubricant and surface roughness. The average Reynolds equation and the related flow factor which describes the coupled effects of surface roughness and flow rheology, the viscosity-pressure and density-pressure relations equations, the elastic deformation equation, and the force balance equation are solved simultaneously. The results show that effects of surface roughness on the film thickness and pressre distribution should be considered especially in EHL contact problems.
Keywords
elastohydrodynamic lubrication(EHL); average reynolds equation; flow factor; surface roughness; ball bearing;
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