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RESEARCH PAPERS

Transient Thermoelastohydrodynamic Study of Tilting-Pad Journal Bearings—Application to Bearing Seizure

[+] Author and Article Information
P. Monmousseau, M. Fillon, J. Frêne

Université de Poitiers, UMR CNRS, Laboratoire de Mécanique des Solides, S.P.2M.I., BP 179, 86960 Futuroscope cedex, France

J. Tribol 120(2), 319-324 (Apr 01, 1998) (6 pages) doi:10.1115/1.2834429 History: Received February 24, 1997; Revised May 30, 1997; Online January 24, 2008

Abstract

Nowadays, tilting-pad journal bearings are used under more and more severely demanding operating conditions. Three limits of safe operation were defined (Leopard, 1976): the hydrodynamic limit, the mechanical limit and the thermal limit. The purpose of this study is to determine the hydrodynamic limit of safe operation during start-up for a tilting-pad journal bearing. During start-up, the rapid increase of the temperature in the bearing solids leads to the thermal expansion of both the pads and the shaft. The operating bearing clearance decreases and, when it tends toward zero, seizure occurs. The evolution of the main characteristics (temperature, pressure, film thickness and displacements) versus time is analyzed in the case when a seizure occurs.

Copyright © 1998 by The American Society of Mechanical Engineers
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