The Effect of the Method of Compensation on Hydrostatic Bearing Stiffness

[+] Author and Article Information
Stanley B. Malanoski, Alfred M. Loeb

The Franklin Institute Laboratories for Research and Development, Philadelphia, Pa.

J. Basic Eng 83(2), 179-185 (Jun 01, 1961) (7 pages) doi:10.1115/1.3658916 History: Received July 15, 1960; Online November 04, 2011


Capillary, orifice, and flow control valve compensation of hydrostatic thrust bearings is investigated theoretically with regard to the effect of these three methods of compensation on the stiffness of the lubricant film. Equations are derived which permit rapid determination of bearing stiffness at any given load and film thickness. When a hydrostatic bearing is made to operate at any given film thickness and load, it is found that at this load and film thickness no adjustment of the compensating element or supply pressure will alter the fact that ψvalve > ψorifice > ψcapillary where ψ equals the absolute value of stiffness. Furthermore, with fixed supply pressure and compensation, this stiffness relationship will remain the same for all practical values of load above and below the initial film thickness-load point.

Copyright © 1961 by ASME
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