Transient Analysis of Tilt Pad Journal Bearings Including Effects of Pad Flexibility and Fluid Film Temperature

[+] Author and Article Information
R. K. Gadangi, A. B. Palazzolo

Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843

J. Tribol 117(2), 302-307 (Apr 01, 1995) (6 pages) doi:10.1115/1.2831247 History: Received March 01, 1994; Revised July 12, 1994; Online January 24, 2008


The paper considers vibration response of spinning shafts supported by flexible tilt pad journal bearings, to large mass imbalance (blade loss). A time transient study of the tilt pad journal bearing with thermal effects and without pad deformations, and with pad deformations and without thermal effects, is performed. Influence of the inclusion of thermal effects on the journal center’s orbit, the minimum film thickness, and the maximum film temperature is evaluated, and also the influence of pad deformations due to the fluid film forces on the journal center’s orbit and the minimum film thickness is studied. Inclusion of thermal effects had little effect on the orbit, while the inclusion of pad deformations had considerable effect on the journal orbit and the minimum film thickness. Three cases are studied in this paper; static load without imbalance, static load with low imbalance, and static load with high imbalance.

Copyright © 1995 by The American Society of Mechanical Engineers
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