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RESEARCH PAPERS

Optimal Design of Squeeze Film Supports for Flexible Rotors

[+] Author and Article Information
M. D. Rabinowitz

Hawker DeHavilland Australia, Lidcombe, New South Wales, Australia

E. J. Hahn

University of New South Wales, Kensington, New South Wales, Australia

J. Eng. Power 105(3), 487-494 (Jul 01, 1983) (8 pages) doi:10.1115/1.3227441 History: Received December 15, 1981; Online September 28, 2009

Abstract

Assuming central preloading, operation below the second bending critical speed, and full film lubrication, this paper presents a theoretical model which allows one, with minimum computation, to design squeeze film damped rotors under conditions of high unbalance loading. Closed form expressions are derived for the maximum vibration amplitudes pertaining to optimally damped conditions. The resulting vibration amplitude and transmissibility data of design interest are presented for a wide range of practical operating conditions on a single chart. It can be seen that for a given rotor, the lighter the bearing the more easily one can satisfy design constraints relating to allowable rotor vibration levels and lubricant supply pressure requirements. The data presented are shown to be applicable to a wide variety of rotors, and a recommended procedure for optimal design is outlined.

Copyright © 1983 by ASME
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