Effect of Frequency Excitation on Force Coefficients of Spiral Groove Gas Seals

[+] Author and Article Information
Nicole Zirkelback

Georgia institute of Technology, George W. Woodruff School of Mechanical Engineering, Atlanta, GA 30332-0405

Luis San Andrés

Texas A&M University, Department of Mechanical Engineering, College Station, TX 77843-3123

J. Tribol 121(4), 853-861 (Oct 01, 1999) (9 pages) doi:10.1115/1.2834145 History: Received February 06, 1998; Revised May 29, 1998; Online January 24, 2008


An analysis for compressible fluid spiral groove thrust bearings (SGTBs) and face seals (SGFSs) is presented. Zeroth- and first-order equations rendering the static and dynamic performance of SGFSs, respectively, are solved using the finite element method with a successive approximation scheme. Comparison of the present isothermal compressible fluid model for static and dynamic SGTB and SGFS performance validates previous narrow groove theory, finite difference, and finite element analyses. A discussion follows to indicate the importance of using a small number of grooves to prevent instabilities from negative damping in SGTBs and SGFSs when pressurization is lost. Force coefficients are shown to reach asymptotic limits as the axial excitation frequency increases.

Copyright © 1999 by The American Society of Mechanical Engineers
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