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RESEARCH PAPERS: Gas Turbines: Structures and Dynamics

Optimization of Bearing Locations for Rotor Systems With Magnetic Bearings

[+] Author and Article Information
S. Srinivasan

United Technologies Research Center, East Hartford, CT 0618

E. H. Maslen, L. E. Barrett

Department of Mechanical, Aerospace, and Nuclear Engineering, University of Virginia, Charlottesville, VA

J. Eng. Gas Turbines Power 119(2), 464-468 (Apr 01, 1997) (5 pages) doi:10.1115/1.2815597 History: Received February 27, 1995; Online November 19, 2007

Abstract

This paper presents a method for quickly evaluating the effect of changes in bearing location on bearing design for stability of rotating machinery. This method is intended for use by rotating machinery designers to select the “best” bearing locations prior to the bearing design process. The purpose of the method is to improve the design process by separating the problem of determining the “best” bearing locations from that of determining the actual bearing design. The method is independent of the type of bearing employed. For each candidate bearing configuration, the method provides a scalar measure of the relative ability of bearings to meet stability specifications. Within certain limits, the stability specifications are defined by the designer. The scalar measure is used to rank the candidate bearing locations and thereby select the best one. The scalar measure is compared to a practical measure of magnetic bearing design such as the infinity norm of the controller for an example design of a multistage centrifugal compressor.

Copyright © 1997 by The American Society of Mechanical Engineers
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