The Role of Cavitation in Whirl Instability in a Rotor Bearing, 1: The π-Film Model

[+] Author and Article Information
J. Brindley, L. Elliott, J. T. McKay

School of Mathematics, University of Leeds, Leeds, England LS2 9JT

J. Appl. Mech 50(4a), 877-885 (Dec 01, 1983) (9 pages) doi:10.1115/1.3167161 History: Received May 01, 1981; Revised March 01, 1983; Online July 21, 2009


Dynamically loaded rotor bearings are frequently observed to perform whirling motions, in which the center of the rotor describes some sort of closed orbit. In this paper we demonstrate, by using numerical computations of whirl orbits in a simple π-film model, the role of cavitation of the lubricant in enabling fluid forces alone to drive such stable orbits for certain ranges of parameter values. For other parameter values cavitation may actually enhance the instability always associated with the effects of fluid forces in a full-film bearing.

Copyright © 1983 by ASME
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