包超英;孟祥铠;李纪云;彭旭东;
BAO Chao-ying;MENG Xiang-kai;LI Ji-yun;PENG Xu-dong;Zhejiang University of Technology;The MOE Engineering Research Center of Process Equipment and Its Remanufacture,Zhejiang University of Technology;

• 1:浙江工业大学
• 2:浙江工业大学过程装备及其再制造教育部工程研究中心

摘要(Abstract)：

针对现有机械密封端面泄漏通道模型存在的不足,考虑到流体在端面间的流动过程和渗流过程具有相似特征,建立了基于渗流原理的接触式机械密封端面间渗流通道模型,利用达西公式计算了端面间的泄漏率。研究了表面粗糙度、膜厚对孔隙率的影响,表面粗糙度对最大微凸体直径的影响,以及膜厚、表面粗糙度、端面宽度和对泄漏率影响。结果表明,孔隙率随表面粗糙度的增大而减小,随膜厚的增大而增大;最大微凸体直径随表面粗糙度的增大呈线性增大趋势;泄漏率随表面粗糙度的增大先增大后减小,随膜厚的增大而增大,随密封端面宽度的增大而减小。提出的研究方法为更准确计算接触式机械密封的泄漏率提供了新思路,对进一步探究密封的泄漏机理具有一定的科学意义。
As to the drawback of available leakage channelmodel inmechanical seal face,considering the similarity of fluid flow throughmechanical seal end face and porousmedia,percolation channelmodel of contactingmechanical seal end face is established based on the percolation theory. The leakage rate is estimated by the Darcy equation. The effect of roughness and film thickness on porosity,the effect of roughness onmaximum asperity radius,and the effect of roughness,film thickness,end face width on the leakage rate are analyzed respectively. The results show that porosity decreases with the increase of roughness,while increases with the increase of film thickness; maximum asperity radius increases linearly with the increase of roughness; the leakage rate initially increases with the increase of roughness then decreases with it,the leakage rate increases with the increase of film thickness,while decreases with the increase of end face length. The research proposed a newmethod to accurately compute the leakage rate of the contactingmechanical seal. It ismeaningful to further study of the leakingmechanism ofmechanical face seal.

关键词(KeyWords)： 表面粗糙度;接触式机械密封;渗流模型;达西公式;泄漏率
surface roughness;contactingmechanical seal;permeabilitymodel;darcy equation;leakage rate

Abstract:

Keywords:

基金项目(Foundation): 国家重点基础研究发展计划973项目(2014CB046404);; 国家自然科学基金项目(51375449);; 浙江省自然科学基金项目(LY14E050012)

作者(Authors): 包超英;孟祥铠;李纪云;彭旭东;
BAO Chao-ying;MENG Xiang-kai;LI Ji-yun;PENG Xu-dong;Zhejiang University of Technology;The MOE Engineering Research Center of Process Equipment and Its Remanufacture,Zhejiang University of Technology;

参考文献(References)：

• [1]彭旭东,佘宝瑛,孟祥铠,等.不同排布方向性椭圆孔液体润滑机械密封性能的研究[J].摩擦学学报,2013,33(5):481-487.
• [2]Mayer E,著.姚兆生,译.机械密封[M].北京:化学工业出版,1981.
• [3]Lebeck A O.Hydrodynamic Lubrication in Wavy Contacting Face Seals—A Two Dimensionalmodel[J].Journal of Lubrication Technology,1981,103(4):578-586.
• [4]Green I.A Transient Dynamic Analysis ofmechanical Seals Including Asperity Contact and Face Deformation[J].Tribology Transactions,2002,45(3):284-293.
• [5]Sun Jian-Jun,Gu Bo-Qin,Wei Long.Leakagemodel of Contactingmechanical Seal Based on Fractal Geometry Theory[J].Journal of Chemical Industry and Engineering,2006,57(7):1626-1631.
• [6]Sun Jian-jun,Wei Long,Feng Xiu,et al.Leakage Predictionmethod for Contactingmechanical Seals with Parallel Faces[J].Chinese Journal ofmechanical Engineering,2010,23(1):7-15.
• [7]刘坤,白少先,李纪云,等.径向变深雁形槽干气密封开启性能研究[J].流体机械,2013,41(6):16-21.
• [8]许志倩,闫相桢,杨秀娟,等.非API套管接头主密封结构气密性能试验分析[J].压力容器,2014,31(4):7-12.
• [9]吴波,陈志,李建明.基于CFD正交试验的螺旋槽干气密封性能仿真研究[J].流体机械,2014,42(1):11-16.
• [10]彭旭东,李纪云,盛颂恩,等.表面粗糙度对螺旋槽干式气体端面密封性能预测与结构优化的影响[J].摩擦学学报,2007,27(6):567-572.
• [11]Ruan B.Numericalmodeling of Dynamic Sealing Behaviors of Spiral Groove Gas Face Seals[J].Tribology Transactions,2002,124:186-195.
• [12]钮建良,孟祥铠,白少先,等.Laser Face液体润滑端面密封性能研究[J].流体机械,2012,39(12):9-13.
• [13]Etsion I,Front I.Amodel for Static Sealing Performance of End Face Seals[J].Tribology Transactions,1994,37(1):111-119.
• [14]张起生,王晓春,谢鸣.符合Gauss分布规律的随机粗糙表面数值模拟[J].燕山大学学报,2008,32(6):503-506.
• [15]Lo S W.A Study on Flow Phenomena inmixed Lubrication Regime by Porousmediummodel[J].Journal of Tribology,1994,116(3):640-647.
• [16]Huang K,Wan J W,Chen C X,et al.Experimental Investigation on Water Flow in Cubic Arrays of Spheres[J].Journal of Hydrology,2013,492:61-68.
• [17]Yu B,Li J.Some Fractal Characters of Porousmedia[J].Fractals,2001,9(3):365-372.
• [18]戴叶.多孔介质相对渗透率的耦合模型[D].武汉:华中科技大学,2011.
• [19]蔺继英.增压泵用机械密封稳态分析及改进[J].化工设备与管道,2013,50(2):52-54.
• [20]葛家理.现代油藏渗流力学原理(第3版)[M].北京:石油工业出版社,2003.