A Study of the Mechanism of Lubrication in Porous Journal Bearings: Effects of Dimensionless Oil-Feed Pressure on Static Characteristics Under Hydrodynamic Lubrication Conditions

[+] Author and Article Information
Satoru Kaneko, Yuji Hashimoto

Department of Mechanical Engineering, Nagaoka University of Technology, Kamitomioka, Nagaoka, 940-21, Japan

Yasuhiro Ohkawa

Kubota Co., Ltd., Chuo-ku, Tokyo, 103, Japan

J. Tribol 116(3), 606-611 (Jul 01, 1994) (6 pages) doi:10.1115/1.2928888 History: Received June 14, 1993; Revised October 01, 1993; Online June 05, 2008


The static characteristics of porous journal bearings under hydrodynamic lubrication conditions are theoretically investigated assuming that the oil is fed through their outside diameters under a small pressure. The angular extent of the oil film formed in the bearing clearance is numerically solved on the basis of the following postulate: when the oil film extent reaches steady state, the inflow of oil into the bearing clearance through the porous matrix due to the oil-feed pressure must make up for the oil leakage from the ends through the clearance gap and that into the porous matrix due to the hydrodynamic pressure in the film. Numerical results show that the dimensionless oil-feed pressure significantly influences the static characteristics. Experiments are also conducted for confirmation after the theoretical examination.

Copyright © 1994 by The American Society of Mechanical Engineers
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