Research Papers

A Simplified One-Dimensional Thermal Model for Journal Bearings

[+] Author and Article Information
Daquan Liu

Department of Engineering Mechanics, Zhengzhou University, Zhengzhou 450001, P.R.C.

Wen Zhang, Tiesheng Zheng

Department of Mechanics and Engineering Science, Fudan University, Shanghai 200433, P.R.C.

J. Tribol 130(1), 011003 (Dec 06, 2007) (9 pages) doi:10.1115/1.2805427 History: Received March 29, 2006; Revised July 30, 2007; Published December 06, 2007

The variational approach, which is used to solve the Reynolds equation based on the assumption of constant temperature, is extended to the generalized Reynolds equation calculation. The direct solution method of the generalized Reynolds equation is presented, where the pressure of the nodal points and the cavitation zone boundary of the film can be determined without iterating. A simplified one-dimensional thermal model is built on the basis of the original two-dimensional thermal model. The model not only concerns the thermal effects of the lubricating film, but also offers a direct and rapid numerical algorithm for solving lubricating film temperature field. The numerical results of the temperature distributions for the one model are in good agreement with experiment, and less computing time is needed.

Copyright © 2008 by American Society of Mechanical Engineers
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Figure 1

Geometry of an axially grooved bearing

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Figure 2

Attitude angle versus the eccentricity ratio for two-axial groove bearing with λ=1.0

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Figure 3

Sommerfeld number versus the eccentricity ratio for two-axial groove bearing with λ=1.0

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Figure 4

Comparison between theoretical and experimental oil-bush interface temperature distributions for a range of loading directions



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