| Mechanics and Mechanical Engineering |
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| Inter-asperity cavitation for misalignment journal lubrication problem based on mass-conservative algorithm |
| Zhen-peng He, Jun-hong Zhang, Zhou-yu Li, Lin Ba, Gui-chang Zhang, Kai-nan Wang, Xing Lu |
| State Key Laboratory of Engine, Tianjin University, Tianjin 300072, China; SAIC Motor Technical Center, Shanghai 201804, China; School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China; Civil Aviation University of China, Tianjin 300300, China |
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Abstract Journal misalignment is common in journal bearings. When severe journal misalignment takes place, it affects nearly all aspects of bearing performance. This paper provided a comprehensive analysis of misaligned journal bearings based on two different mass-conservative models which appropriately took into account film rupture and reformation. The lubrication characteristics and performance parameters including the cavitation zones, pressure distribution, density distribution, oil leakage, load capacity, moment, and attitude angle were compared with the traditional lubrication model. The results showed that cavitation has great effect on bearing performances, especially when the surface roughness is large. Therefore, it is necessary to consider the effects of journal misalignment alongside inter-asperity cavitation theory in the design and analyses of journal bearings.
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Received: 14 March 2013
Published: 02 June 2013
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