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RESEARCH PAPERS

The Effects of Three-Dimensional Pad Deformations on Tilting-Pad Journal Bearings Under Dynamic Loading

[+] Author and Article Information
H. Desbordes, M. Fillon, J. Frêne

Université de Poitiers, Laboratoire de Mécanique des Solides, URA CNRS, 40, Avenue du Recteur Pineau, 86022 Poitiers Cedex, France

C. Chan Hew Wai

Electricité De France, Direction des Etudes et Recherches, Départment Machines, B.P. 24, 6, Quai Watier, 78401 Chatou Cedex, France

J. Tribol 117(3), 379-384 (Jul 01, 1995) (6 pages) doi:10.1115/1.2831262 History: Received February 07, 1994; Revised July 12, 1994; Online January 24, 2008

Abstract

Pad distortions are generally not taken into account for the dynamic study of tilting-pad journal bearings. The objective of this paper is both to show the influence of the three-dimensional (3-D) pad deformations due to the pressure field on the bearing response and to analyse the bearing behavior for various unbalance eccentricities. Similar orbits are obtained using 2-D or 3-D pad deformations; however, due to the axial profile of the film thickness, the minimum film thickness obtained with the 3-D model is about 40 percent lower than the one obtained with the 2-D model for the greatest unbalance eccentricity. The maximum pressure is decreased by about 16 percent when the 3-D model is used but that value is nearly similar to the one obtained without deformation. The dynamic behavior of the bearing is largely modified when the dynamic load is greater than the static load.

Copyright © 1995 by The American Society of Mechanical Engineers
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