旋转轴唇形密封泵吸率的有限元数值分析  

Numerical Analysis of Reverse Pumping Rate of Rotary Lip Seal by Finite Element Method

作　　者：江华生[1,2] 彭旭东[1] 孟祥铠[1] 沈明学[1] 

机构地区：[1]浙江工业大学机械工程学院,杭州310032 [2]嘉兴学院生物与化学工程学院,浙江嘉兴314001

出　　处：《上海交通大学学报》2014年第8期1194-1199,共6页Journal of Shanghai Jiaotong University

基　　金：国家重点基础研究发展规划(973)项目(2014CB046404);国家自然科学基金资助项目(51305398);浙江省自然科学基金资助项目(LQ13E050013);浙江省重点科技创新团队项目(2010R50002)

摘　　要：为准确预测旋转轴唇形密封的泵吸率,采用JFO空化边界条件,建立了遵循质量守恒的唇形密封的稳态润滑数学模型;采用流线迎风有限单元法求解润滑控制方程,分析了唇形密封操作参数和表面微条纹结构参数对泵吸率的影响规律.结果表明:泵吸率随转轴速度增加而增加,而随密封压力增加而减小,甚至转变为泄漏率;泵吸率随微条纹的周向波度、周向波长、最大周向变形的增大而增加,而随微条纹的轴向波度的增大而减小;微条纹最大周向变形位置靠近油侧时,唇形密封才具有泵吸作用,且越靠近油侧,泵吸率越大.In order to accurately predict the reverse pumping rate of rotary lip seals,a mathematical model of lip seal under steady state was developed adopting the JFO cavitation boundary condition based on mass conservation.The lubrication governing equation was solved by streamline upwind finite element method.Then,the effects of operating parameters and micro-undulation structural parameters on the reverse pumping rate were investigated.The results show that the reverse pumping rate increases with the rotary shaft running speed,while decreases with the sealed pressure,or even turns to leakage rate.The reverse pumping rate increases with the micro-undulation circumferential amplitude,wavelength and the maximum circumferential deformation,while decreases with the micro-undulation axial profile amplitude.The lip seal shows reverse pumping effect only when the location of the maximum circumferential deformation is close to the oil side,and the closer it is to the oil side,the larger the reverse pumping rate is.

关 键 词：唇形密封 泵吸率 JFO空化 流线迎风 有限元法 

分 类 号：TH117.2[机械工程—机械设计及理论]