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工程设计学报
Chinese Journal of Engineering Design  2014, Vol. 21 Issue (6): 540-544    DOI: 10.3785/j.issn. 1006-754X.2014.06.006
    
Effect of mixed micro-dimple on the hydrodynamic properties of mechanical face seal
LI Mao-yuan1， WU Yu-guo1， WU Sheng2， CHEN Bin1
1.School of Mechanical Engineering， Anhui University of Technology， Ma′anshan 243032， China；
2. Ma′anshan Iron & Steel Company Limited， Ma′anshan 243000， China;
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Abstract  Surface texturing has been recognized to be efficient in modifying the tribological performances of relatively moving surface. A theoretical model of mechanical face seal within equally distributed microdimples was developed， the finite difference method was utilized to calculate the hydrodynamic lubrication equation and the dimensionless pressure distribution of the gas film between the face seal was obtained. The effect of the the shape and mixed patterns of the micro-dimples on the average dimensionless pressure pavof the face seal was also investigated. The results showed that the mixed dimples with different scale had a better performance of dynamic pressure than the seal face which distributed with large or small dimples only under the same shape，the rectangle dimple showed most clearly effect， the improve proportion of dynamic pressure performance ξ3could be reach to 6.79%. Mixed micro-dimple can improve the hydrodynamic properties of face seal obviously．

Key words： mechanical face seal      finite difference method      mixed dimple      hydrodynamic property     
Received: 23 June 2014      Published: 28 December 2014
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Cite this article:

LI Mao-yuan，WU Yu-guo，WU Sheng，CHEN Bin. Effect of mixed micro-dimple on the hydrodynamic properties of mechanical face seal. Chinese Journal of Engineering Design, 2014, 21(6): 540-544.

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https://www.zjujournals.com/gcsjxb/10.3785/j.issn. 1006-754X.2014.06.006     OR     https://www.zjujournals.com/gcsjxb/Y2014/V21/I6/540


复合表面微凹坑对机械端面密封动压性能的影响

针对表面织构可以有效改善相对运动表面的摩擦学性能，建立了均匀分布的微凹坑机械端面密封的理论模型，采用有限差分法对流体动压润滑方程进行求解，获得了密封端面间气膜的无量纲压力分布，并考察了微凹坑形状和复合形式对密封端面的无量纲平均压力pav的影响．结果表明：微凹坑在相同的形状下，大小尺度不同的复合凹坑比单一凹坑具有更强的动压性能，而以矩形凹坑表现得最为明显，其动压性能效率提高率ξ3可达6.79%；微凹坑的复合可明显增强密封端面动压性能．

关键词： 机械端面密封,  有限差分法,  复合凹坑,  动压性能 
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