On the design anddevelopment of hybridjournal bearings: a review

Abstract

This paper presents a comprehensive review of developments in the designand application of hydrostatic and hybrid journal bearing systems during thelast few decades. Revolutionary changes have taken place in the applicationsof hydrostatic and hybrid journal bearings, from very low-speed radar to veryhigh-speed turbo-machinery and ultra-precision machine tools requiring highstiffness to improve accuracy. Hydrostatic and hybrid bearings are of interestbecause of their potential at very high operating speed and heavy load-carrying capacity. This paper also outlines the analyses done of these types ofjournal bearings in practical application, which has led to improved bearingdesign. This review critically discusses the parameters that significantly affectthe static and dynamic performance of a journal bearing. This review includescoverage of recent publications in the literature pertaining to hydrostatic andhybrid journal bearings focusing on the influence of parameters such asbearing geometry, supply pressure, flow control devices, fluid compressibility,fluid inertia, journal misalignment, bearing flexibility, surface roughness, andthermal effects. Copyright © 2006 John Wiley & Sons, Ltd.