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| Model and application of thermal effects in multi-arc journal bearings |
| Revised:February 26, 2005 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20073064 |
| KeyWord:energy equation,the mean temperature field,thermohydrodynamic effects,a direct solution method,multi-arc journal bearings |
| LIU Da-quan ZHENG Tie-sheng ZHANG Wen |
| 1. Department of Engineering ZHENG Tie-sheng, ZHANG Wen Mechanics,Zhengzhou University,Zhengzhou 450001 ,China; 2. Department of Mechanics and Engineering Science,Fudan University,Shanghai 200433,China |
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| Abstract: |
| An one-dimensional variable viscosity field model of finite journal bearing was built.The model was defined by analysis formula in the axial direction and was distributed by finite element in the circumferential pressure direction.It was assumed that the Poiseuille component of velocity could be neglected and that the temperature variation in the axial direction was negligibly small,the three-dimensional energy equation could be reduced to the one-dimensional form by integrating across the film.The Reynolds equation and the energy equation were solved respectively.The energy equation gives the distribution of the circumferential mean temperature field subjected to an adiabatic boundary condition at the oil-bush interface.The analysis of the thermohydrodynamic effects of the lubricating film in a journal bearing was concerned and a rapid numerical algorithm of direct solution method for solving the Reynolds equation was derived.As an application,the thermohydrodynamic analysis for the elliptical journal bearing with two axial grooves in the horizontal direction are presented.Good agreement between theoretical and the engineering applied data is achieved.The new model is reasonable and suitable in engineering multi-arc journal bearings analysis. |
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