Oil Film Thickness and Shape for a Ball Sliding in a Grooved Raceway

[+] Author and Article Information
N. Thorp, R. Gohar

Mechanical Engineering Department, Imperial College, London, England

J. of Lubrication Tech 94(3), 199-208 (Jul 01, 1972) (10 pages) doi:10.1115/1.3451687 History: Received March 24, 1971; Revised July 01, 1971; Online October 18, 2010


The behavior in the lubricated contact area of a driven ball sliding in a conforming glass groove, is studied. Interferometry is used to measure the oil film. Coupled ball surface velocity components are provided by angling the drive, while loads and speeds are varied in order to cover a range of conditions from undistorted surfaces to elastohydrodynamic lubrication. A general theory for lubrication with, no distortion and pressure-dependent viscosity, is developed and compared with experiment. Ball spin is found to have only a small effect on the oil film thickness.

Copyright © 1972 by ASME
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