A Mixed-Lubrication Study of Journal Bearing Conformal Contacts

[+] Author and Article Information
Qian (Jane) Wang, Fanghui Shi

Department of Mechanical Engineering, Florida International University, Miami, FL 33199

Si C. Lee

Department of Mechanical Engineering, Ohio State University, Columbus, OH 43210

J. Tribol 119(3), 456-461 (Jul 01, 1997) (6 pages) doi:10.1115/1.2833519 History: Received March 06, 1996; Revised June 26, 1996; Online January 24, 2008


Numerical analyses of finite journal bearings operating with large eccentricity ratios were conducted to better understand the mixed lubrication phenomena in conformal contacts. The average Reynolds equation derived by Patir and Cheng was utilized in the lubrication analysis. The influence function, calculated numerically using the finite element method, was employed to compute the bearing deformation. The effects of bearing surface roughness were incorporated in the present analysis for the calculations of the asperity contact pressure and the asperity contact area. The numerical solutions of the hydrodynamic and asperity contact pressures, lubricant film thickness, and asperity contact area were evaluated based on a simulated bearing-journal geometry. The calculations revealed that the asperity contact pressure may vary significantly along both the width and the circumferential directions. It was also shown that the asperity contacts and the lubricant film thickness were strongly dependent on the bearing width, asperity orientation, and operating conditions.

Copyright © 1997 by The American Society of Mechanical Engineers
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