Elastohydrodynamic Analysis of Reverse Pumping in Rotary Lip Seals With Microasperities

[+] Author and Article Information
Richard F. Salant, Andrew L. Flaherty

School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332

J. Tribol 117(1), 53-59 (Jan 01, 1995) (7 pages) doi:10.1115/1.2830606 History: Received February 24, 1994; Revised May 17, 1994; Online January 24, 2008


An elastohydrodynamic analysis of a rotary lip seal containing microasperities, incorporating both the fluid mechanics of the lubricating film and the elastic behavior of the lip, has been performed numerically. The results indicate that some asperity patterns generate reverse pumping that prevents leakage through the seal. Other asperity patterns are found to generate negative reverse pumping that enhances leakage. In all cases considered, the asperities also hydrodynamically generate sufficiently high pressures to provide load support and maintain the integrity of the film.

Copyright © 1995 by The American Society of Mechanical Engineers
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