A Thermohydrodynamic Lubrication Analysis to Design Large Two-Pad Journal Bearing With Cooling Ditches

[+] Author and Article Information
S. Taniguchi

Hiroshima R & D Center, Mitsubishi Heavy Industries, Ltd., Mihara, Hiroshima, Japan

T. Makino

Nagasaki R & D Center, Mitsubishi Heavy Industries, Ltd., Nagasaki, Japan

Y. Ozawa

Takasago R & D Center, Mitsubishi Heavy Industries, Ltd., Takasago, Hyogo, Japan

T. Ichimura

Takasago Machinery Works, Mitsubishi Heavy Industries, Ltd., Takasago, Hyogo, Japan

J. Tribol 120(2), 214-220 (Apr 01, 1998) (7 pages) doi:10.1115/1.2834412 History: Received December 03, 1996; Revised May 06, 1997; Online January 24, 2008


A newly developed large two-pad journal bearing with cooling ditches and viscous pump for turbines of electric utilities was analyzed theoretically. The turbulent thermohydrodynamic lubrication analysis was done in connection with the flow analysis of oil circulating system through the cooling ditches and the viscous pump. The complicated simultaneous equations concerned with the oil flow in the bearing were solved and used to design a bearing of 535 mm diameter which will make its appearance in a near future. Full size bearing tests were carried out to check the bearing performance and viscous pump performance and to confirm the accuracy of the calculation method. Good agreement was obtained between the theoretical and experimental results.

Copyright © 1998 by The American Society of Mechanical Engineers
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