Elastohydrodynamic Lubrication of Air-Lubricated Rollers

[+] Author and Article Information
Y. B. Chang, F. W. Chambers, J. J. Shelton

School of Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater, OK 74078

J. Tribol 118(3), 623-628 (Jul 01, 1996) (6 pages) doi:10.1115/1.2831582 History: Received February 28, 1995; Revised July 26, 1995; Online January 24, 2008


The lubricating air film between two rotating rollers in close contact was studied numerically. The numerical model used in this study accounts for the effects of air compressibility, material deformation, and the slip flow which occurs when the air film thickness is not much larger than the mean-free-path of the air molecules. The air film profiles and the pressure profiles for the nip region between the rollers were calculated. It was found that the calculated air film thicknesses are lower than predicted by the liquid elastohydrodynamic calculation. From this study, equations for the minimum air film thickness, the air film thickness at the center of contact, and the amount of air that passes through the nip were obtained. This study has application to the prediction of the amount of air entrained in a winding roll.

Copyright © 1996 by The American Society of Mechanical Engineers
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