Performance Analysis of Magnetic Hydrodynamic Tilted Bearing with Surface Roughness

Abstract

The performances characteristics of magnetic hydrodynamic tilted bearing with surface roughness lubricated with ferrofluid are studied in this study. To explore the effects of ferrofluid to the bearings, the Shah’s theoretical model and the modified items of characteristics related to magnetic ferrofluid are adopted. As the affections of surface roughness to the bearings, the stochastic Christensen Reynolds’ equation is applied; meanwhile, with the consideration of the non-zero mean α, variance σ and skewness ε. According to the results, comparing with the Newtonian fluids, the tilted bearing lubricated with magnetic ferrofluid has the higher built-up pressure distribution and load-carrying capacities. As the non-zero mean α of the surface roughness increases, the responding time decreases. On the other hand, increases the variation σ, decreases the responding time in longitudinal surface roughness; whereas, the transverse type has the inverse trend of responding time when variation increases.