Synchronous Unbalance Response of an Overhung Rotor with Disk Skew

[+] Author and Article Information
D. J. Salamone

Compressor Division, Allis-Chalmers Corporation, Milwaukee, Wisc.

E. J. Gunter

Dept. of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, Va.

J. Eng. Power 102(4), 749-755 (Oct 01, 1980) (7 pages) doi:10.1115/1.3230336 History: Received December 26, 1978; Online September 28, 2009


This paper deals with the influence of disk skew on the synchronous unbalance response of flexible rotors in damped bearings. A simple overhung rotor is treated to illustrate the effects of various combinations of unbalance and disk skew on the amplitude and phase angle response at the disk and bearings. The paper shows that it is impossible to balance the rotor at all speeds by single plane balancing even if three correction planes are employed. The presence of disk skew may be best detected by monitoring the far bearing for a rapid phase angle decrease after passing through the first critical speed.

Copyright © 1980 by ASME
Topics: Rotors , Disks , Bearings
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