Experimental Test Results for Four High-Speed, High-Pressure, Orifice-Compensated Hybrid Bearings

[+] Author and Article Information
N. M. Franchek

Purdue University, 1077 Ray W. Herrick Laboratories, West Lafayette, IN 47907

D. W. Childs

Texas A&M University, Turbomachinery Laboratory, College Station, TX 77843

J. Tribol 116(1), 147-153 (Jan 01, 1994) (7 pages) doi:10.1115/1.2927031 History: Received February 11, 1993; Revised July 06, 1993; Online June 05, 2008


In this study, four hybrid bearings having different geometric configurations were experimentally tested for their static and dynamic characteristics, including flowrate, load capacity, rotordynamic coefficients, and whirl frequency ratio. The four bearings included a square-recess, smooth-land, radial-orifice bearing (baseline), a circular-recess bearing, a triangular-recess bearing, and an angled-orifice bearing. Each bearing had the same orifice diameter rather than the same pressure ratio. Unique to these test results is the measurement of the added mass terms, which became significant in the present tests because of high operating Reynolds numbers. Comparisons of the results were made between bearings to determine which bearing had the best performance. Based on the parameters of interest, the angled-orifice bearing has the most favorable overall performance.

Copyright © 1994 by The American Society of Mechanical Engineers
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