속도의 영향에 따른 3차원 거친 표면의 혼합윤활해석

Abstract

Dept. of Mechanical Engineering, Pusan National University(Received September 5, 2012 ; Revised November 11, 2012 ; Accepted November 12, 2012)Abstract − This study examined the effects of surface roughness in the mixed lubrication regime of smooth andrough surfaces for roller bearings. The average flow model was adopted for interaction between the flow rhe-ology of the lubricant and the surface roughness. The average Reynolds equation and related flow factor thatdescribes the coupled effects of surface roughness and flow rheology, the viscosity–pressure and density–pressureequations, the elastic deformation equation, and the force balance equation were solved simultaneously. Theresults showed that the effects of surface roughness on the film thickness and pressure distribution should be con-sidered, especially in elastohydrodynamic lubrication contact problems. Keywords − average Reynolds equation (평균레이놀즈방정식), flow factor (유동계수), surface roughness(표면거칠기), roller bearing (롤러베어링), dimensionless film parameter (유막계수)