Lundberg형 프로파일의 원통형 로울러의 탄성유체윤활 해석

Abstract

The rollers and/or races in cylindrical and tapered roller bearings should be profiled to relieve highedge stress concentrations caused by their finite lengths and misalignment. In this study, a numerical analysis wasperformed to investigate the elastohydrodynamic (EHL) lubrication of a Lundberg profile-type cylindrical roller. A finite difference method with fully nonuniform grids and the Newton-Raphson method eere used to presentdetailed EHL pressure distributions and film shapes, as well as the variations in the minimum and central filmthicknesses with the profile modification coefficient. In the Lundberg profile, the maximum pressure and minimumfilm thickness always occurred near the edges. Proper modification of the Lundberg profile considerablyincreased the minimum film thickness.