0
RESEARCH PAPERS: Design Technology

Instability of Rotors in Fluid Film Bearings

[+] Author and Article Information
J. S. Rao

Indian Institute of Technology

J. Vib., Acoust., Stress, and Reliab 105(3), 274-279 (Jul 01, 1983) (6 pages) doi:10.1115/1.3269100 History: Received January 01, 1981; Online November 23, 2009

Abstract

This paper is concerned with instability of a rotor that arises due to fluid film forces of a journal bearing. The half frequency whirl and the resulting oil whip phenomena is explained by a consideration of flow balance in a bearing which looses the load carrying capacity. The threshold instability criterion for a rigid rotor in plain cylindrical bearings is given in the form of a chart by obtaining the solution of equations of motion with the corresponding spring and damping coefficients. Both translatory and conical whirls are considered. The analysis is then presented for a flexible rotor and a simple procedure is given to obtain the instability threshold speed based on the rigid rotor criterion. The procedure does not involve any trial and error iteration calculations and is illustrated by a case study.

Copyright © 1983 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In