Modeling and Analysis of a Wavy Thrust Bearing

Abstract

This paper presents an analytical and numerical development for the simulation of a wavy thrust bearing. The analytical formulation is based on an expanded, compressible Reynolds equation model, while the numerical procedure is based on the solution of the discretized (finite difference) form of the Reynolds equation. Effects of the bearing radius, clearance, lubricant viscosity, circumferential wave amplitude, and angular velocity are examined. Numerical results of the parametric studies are summarized through graphs for the pressure distributions and resulting load capacities. The major findings of this study show that the wavy configuration, even for extremely low wave amplitudes, produces significant pressure build-up and thus allows the generation of relatively large load carrying capacities. It has also been determined that while the bearing number A, angular velocity, surface wave period and viscosity do not affect the phase angle between the peak pressure and the bearing surface wave, the wave amplitude ‘g’ does indeed substantially change the phase angle. It has been concluded that the continuous wavy configuration acts as a succession of mini-slider bearings and is a rather viable alternative to the Raleigh step, or spiral configurations for a self-acting thrust bearing.

Presented at the 56th Annual Meeting in Orlando, Florida May 20–24, 2001

Notes

Presented at the 56th Annual Meeting in Orlando, Florida May 20–24, 2001