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RESEARCH PAPERS

The Dynamic Characteristics of a Turborotor Simulator Supported on Gas-Lubricated Foil Bearings—Part 3: Rotation in Foil Bearings of Reduced Length, With Starting and Stopping Unaided by External Pressurization

[+] Author and Article Information
L. Licht

Ampex Corporation, Redwood City, Calif.

J. of Lubrication Tech 94(3), 211-220 (Jul 01, 1972) (10 pages) doi:10.1115/1.3451692 History: Received March 01, 1971; Revised July 06, 1971; Online October 18, 2010

Abstract

Experiments and analysis, reported in detail in references [1] through [5], demonstrated that high-speed rotors, supported by foil bearings, were free from whirl-instability and sensitivity to excitation at frequency equal one half the speed of rotation. It was shown also that the foil bearing could accommodate thermal and geometrical distortions, combining this attribute with excellent wipe-wear characteristics and tolerance of particles. The present investigation was directed toward the solution of two important problems: (a) the reduction of foil bearing length without detriment to rotor performance, and (b) the elimination of the foil-lift system and attainment of multiple start-stops without the aid of external pressurization. A description of experimental methods, which lead to the realization of the foregoing objectives, is given.

Copyright © 1972 by ASME
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