PERFORMANCE OF HYDROSTATIC HYBRID JOURNAL BEARINGS WITH UNCONVENTIONAL RECESS GEOMETRIES/

A theoretical study using FEM is performed of multirecess capillary co mpensated hydrostatic/hybrid journal bearings which find use in number of engineering applications. In this study, bearings having four diff erent recess shapes were observed for their static and dynamic perform ance parameters which include minimum film thickness, flow rate, rotor dynamic coefficients and threshold speed. The bearings with four diffe rent recess geometries included in the present study were a square rec ess bearing, a circular recess bearing, a triangular recess bearing an d an elliptical recess bearing. Comparisons of performance characteris tics were made to determine which recess shape gives the best performa nce. The results presented in this paper are expected to hell, machine tool designers make better use of the recess shapes.