Stability Criterion for Spiral Grooved Thrust Gas Bearings

[+] Author and Article Information
V. N. Constantinescu, S. Galetuse

Faculty of Aviation, Polytechnic Institute of Bucharest, Bucharest, Romania

J. Tribol 112(4), 734-737 (Oct 01, 1990) (4 pages) doi:10.1115/1.2920322 History: Received April 19, 1990; Revised May 31, 1990; Online June 05, 2008


A previous analysis of dynamic stability for a blocked center inward pumping spiral grooved thrust gas bearing is extended to two other types of similar bearings, namely annular thrust bearings with either inward or outward pumping. Both a numerical small perturbation analysis and an analytical procedure are used, the latter one being based on an approximate shape of the pressure distribution. The analysis provides a critical compressibility number up to which the bearings is unconditionally stable.

Copyright © 1990 by The American Society of Mechanical Engineers
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