高压导管球形接头结构密封性能研究  

Research on Sealing Performance of High Pressure Conduit Ball Joint Structure

作　　者：宋瑞宏[1,2] 戴忞中 史文杰 王剑锋[3] SONG Rui-hong;DAI Min-zhong;SHI Wen-jie;WANG Jian-feng(School of Mechanical Engineering,Changzhou University,Jiangsu Changzhou 213164,China;Changzhou Mould Advanced Manufacturing High Technology Research Key Laboratory,Jiangsu Changzhou 213164,China;Jiangsu Tengchi Technology Co.Ltd.,Jiangsu Changzhou 213165,China)

机构地区：[1]常州大学机械工程学院,江苏常州213164 [2]常州市模具先进制造高技术研究重点实验室,江苏常州213164 [3]江苏腾驰科技有限公司,江苏常州213165

出　　处：《机械设计与制造》2022年第4期50-54,共5页Machinery Design & Manufacture

基　　金：江苏省研究生科研与实践创新计划项目(KYCX18_2648)。

摘　　要：根据混合动力汽车发动机内常用导管连接形式,针对导管接头球面-锥面密封结构研究密封性能。通过漏率经验公式,结合Hertz接触理论进行漏率估算,分析得到密封结构初始密封状态下影响密封性能的各项指标。在此基础上,采用非线性有限元法研究拧紧力矩与密封面接触应力、宽度及应力分布的关系,结果表明相对较大的拧紧力矩能够增加密封面接触应力与密封面宽度,加强球面-锥面密封结构的密封效果,同时得到了装配过程需轴向对中的要求及合理的安装扭矩。通过实验证明了分析方法的准确性。According to the common conduit connection form in the hybrid vehicle engine,the sealing performance is studied for the sphere-cone sealing structure of the conduit joint.Leak rate estimation using leak rate empirical formula and Hertz contact theory,after analysis,various indexes affecting the sealing performance in the initial state of the sealing structure are obtained.On this basis,the nonlinear finite element method is used to study the relationship between the tightening torque and the contact stress,width and stress distribution of the sealing surface.The results show that the relatively large tightening torque can increase the sealing surface contact stress and the sealing surface width,and strengthened the sealing effect of the sphere-cone sealing structure.Meanwhile,the sealing effect of the face seal structure,and the axial alignment requirements and reasonable installation torque of the assembly process are obtained.The accuracy of the analytical method is proved by experiments.

关 键 词：球面-锥面密封 漏率估算 接触应力 密封性能 实验验证 

分 类 号：TH16[机械工程—机械制造及自动化] TB42[一般工业技术]