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RESEARCH PAPERS: Rotor Dynamics

Experiments on Dynamic Stiffness and Damping of Tapered Bore Seals

[+] Author and Article Information
D. P. Fleming

National Aeronautics and Space Administration, Lewis Research Center, Cleveland, Ohio 44135

J. Vib., Acoust., Stress, and Reliab 111(1), 1-5 (Jan 01, 1989) (5 pages) doi:10.1115/1.3269818 History: Received June 01, 1987; Online November 23, 2009

Abstract

Stiffness and damping were measured in tapered bore ring seals with air as the sealed fluid. Excitation was provided by a known unbalance in the shaft which rotated in the test seals. Results were obtained for various seal supply pressures, clearances, unbalance amounts, and shaft speeds. Stiffness and damping varied little with unbalance level, indicating linearity of the seal. Greater variation was observed with speed and particularly supply pressure. A one-dimensional analysis predicted stiffness fairly well, but considerably overestimated damping.

Copyright © 1989 by ASME
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