Stability Characteristics of a Journal Bearing Mounted in an Uncentralized Squeeze Film Damper

[+] Author and Article Information
Yuichi Sato

Department of Mechanical Engineering, Saitama University, Urawa 388, Japan

H. Fujino, H. Sakakida, S. Hisa

Toshiba Corporation, Yokohama, 230, Japan

J. Tribol 113(3), 584-589 (Jul 01, 1991) (6 pages) doi:10.1115/1.2920663 History: Received February 26, 1990; Revised June 25, 1990; Online June 05, 2008


This paper describes the stability of a journal bearing mounted in an uncentralized squeeze film damper. It is known that mounting a journal bearing in a centralized squeeze film damper improves the bearing stability. From a practical viewpoint, however, it is difficult to centralize journal bearings which support a heavy rotor, such as a steam turbine. Experimentally, we show that a journal bearing can be stabilized by mounting in an uncentralized squeeze film damper. The effect of clearance of a squeeze film damper is investigated. By using short bearing analysis, rotor trajectories are calculated. Calculated results also shows stability improvement.

Copyright © 1991 by The American Society of Mechanical Engineers
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