Optimization of Conical Hydrostatic Bearing for Minimum Friction

[+] Author and Article Information
L. J. Nypan

San Fernando Valley State College, Northridge, Calif.

B. J. Hamrock, H. W. Scibbe, W. J. Anderson

NASA Lewis Research Center, Cleveland, Ohio

J. of Lubrication Tech 94(2), 136-142 (Apr 01, 1972) (7 pages) doi:10.1115/1.3451656 History: Received March 08, 1971; Revised June 22, 1971; Online October 18, 2010


Equations for the flow rate, load capacity, and friction torque for a conical hydrostatic bearing were developed. These equations were solved by a digital computer program to determine bearing configurations for minimum friction torque. Design curves are presented that show optimal bearing dimensions for minimum friction torque as a function of dimensionless flow rate for a range of dimensionless load capacity. Results are shown for both laminar and turbulent flow conditions. The results indicate the hydrostatic pocket friction is a significant portion of the total friction torque. However, the bearing dimensions for a minimum friction design are affected very little by inclusion of pocket friction in the analysis. For laminar flow the values of the outerland radius ratio X3 and outer bearing radius ratio X4 did not change significantly with increasing friction factor. For turbulent flow, the outer bearing radius ratio X4 did not change with increasing friction factor; therefore, the value determined for X4 in the laminar flow case is valid for all turbulent flows.

Copyright © 1972 by ASME
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