An Analytical Study of Starved Porous Bearings

Abstract

An analytical solution for the performance characteristics of starved porous bearings is obtained. The solution is based on a finite bearing with an arbitrary wall thickness. The Reynolds equation is modified to include the effect of velocity slip at the interface between the oil film and porous wall. The data presented are for a bearing with a length-to-diameter ratio of 1.0, an outside diameter-to-inside diameter ratio of 1.25 and a radial clearance-to-inside radius ratio of 0.0015. The data are presented in a form such that by knowing the oil supplied externally to the porous bearing or by knowing the active oil film arc, the load capacity and coefficient of friction of the bearing can be obtained for given eccentricity ratios and permeability parameters.