基于逾渗理论的接触式机械密封泄漏特性分析  

Leakage Characteristics Analysis of Contacting Mechanical Seal Based on Percolation Theory

作　　者：王衍[1] 王达 曹彬 张宝鼎 孙见君[2] WANG Yan;WANG Da;CAO Bin;ZHANG Baoding;SUN Jianjun(Mechanical Engineering School,Huaihai Institute of Technology,Liangyungang Jiangsu 222005,China;College of Mechanical and Electronical Engineering,Nanjing Forestry University,Nanjing Jiangsu 210037,China)

机构地区：[1]淮海工学院机械工程学院,江苏连云港222005 [2]南京林业大学机械电子工程学院,江苏南京210037

出　　处：《润滑与密封》2018年第5期76-80,103,共6页Lubrication Engineering

基　　金：江苏省高校自然科学研究基金项目(15KJB460002);淮海工学院创新基金项目(Z2014010);淮海工学院人才引进基金项目(KQ16006);淮海工学院校级大学生实践创新训练计划项目(2014120314)

摘　　要：以接触式机械密封动、静环接触界面为研究对象,分析其表面微观形貌中的自仿射分形特性,结合逾渗理论,对密封端面泄漏通道特性进行理论分析,并利用Fluent软件对微通道内的流体流动进行数值模拟,探讨机械密封的端面载荷、表面形貌参数对泄漏量的影响。研究结果表明,密封端面的泄漏量随密封端面分形维数的增加而降低;在某一确定分形维数下,随着表面轮廓尺寸系数的增大,泄漏率也相应增大;端面比载荷对机械密封泄漏率的影响存在但并不显著。逾渗理论是一种研究多孔介质的强无序及随机几何结构端面特性的较好方法,对实现机械密封工作状况的正确判断,指导机械密封件的设计、制造、使用和维修具有一定的指导意义。Based on dynamic-static ring interface of contacting mechanical seal and self affine analysis of surface microstructure,the leakage of seal face channel characteristics were analyzed using percolation theory. Numerical simulations of the fluid flow in a micro-channel were focused on mechanical seal face load,surface topography parameters. The results show that the leakage volume of mechanical seal is reduced with the increase of fractal dimension. In a certain fractal dimension,the leakage rate is increased as the coefficient of surface contour coefficient increases. Terminal unit load has few effects on leakage of mechanical seal. It is feasible to study the end surface characteristics of strong disorder and random geometry in porous media by using the percolation theory,and the research result can contribute to the judgment of mechanical seal working condition,as well as design,manufacture,use and maintenance of mechanical seal.

关 键 词：机械密封 逾渗理论 泄漏通道 泄漏量 

分 类 号：TH136[机械工程—机械制造及自动化]