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ABSTRACT
When a hydrodynamic journal bearing works under an excessively heavy load, there occurs the very small bearing clearance where physical adsorbed layer boundary lubrication is present. For evaluating the performance of such a hydrodynamic journal bearing, an analysis is here presented by incorporating both the hydrodynamic lubrication and the boundary lubrication which respectively occur in different lubricated areas. The calculation results show that the boundary lubrication effect significantly increases the lubricating film pressure and load-carrying capacity of the bearing especially when the fluid-bearing surface interaction is strong, as compared to the conventional hydrodynamic lubrication theory calculations; Stronger the boundary lubrication, closer to the exit of the bearing the location where the maximum film pressure occurs, and nearer to the minimum bearing surface separation the exit of the bearing.
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No potential conflict of interest was reported by the authors.
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Notes on contributors
Fuhang Xie
Fuhang Xie is a master degree candidate in the study of hydrodynamic journal bearing with mixed lubrication working with the advisory professor Yongbin Zhang in the College of Mechanical Engineering, Changzhou University, China.
Yongbin Zhang
Yongbin Zhang is a professor in the College of Mechanical Engineering, Changzhou University, China. His research interests include micro/nano flow, nanoporous filtration membrane and hydrodynamic lubrication.
Haijun Chen
Haijun Chen is a master degree candidate in the study of hydrodynamic journal bearing with interfacial slippage working with the advisory professor Yongbin Zhang in the College of Mechanical Engineering, Changzhou University, China.