球面密封结构的漏率预估  

Leak Rate Prediction of Orbicular Seal Joint

作　　者：周鑫[1] 庞贺伟[1] 刘宏阳[1] 

机构地区：[1]中国空间技术研究院,北京100094

出　　处：《宇航学报》2007年第3期762-766,共5页Journal of Astronautics

摘　　要：球面密封结构是国内卫星推进系统管路中经常使用的密封结构,其工作性能直接关系着卫星的在轨安全。针对球面密封的密封机理,通过非线性有限元法分析了安装条件下的密封状态。在此基础上,研究了泄漏气流的流动状态,结合Roth模型建立了分子流状态下的漏率计算模型,得出了泄漏漏率和拧紧力矩、表面粗糙度的对应关系,对检漏条件下结构的漏率进行了预估。在理论计算的同时,通过实验证明了漏率预估方法的准确性。The orbicular seal joint is widely used in the pipelines of propulsion system of satellite made in China.Its sealing reliability straightly relates with satellites' safety.At first,sealing mechanism is studied and nonlinear finite element analysis is carried out to simulate the sealing condition.Based on these results,the leak flow is studied and calculated.With the application of triangle model suggested by Roth,the molecular flow model is constructed and leak rate is predicted.In the model,the relation be...

关 键 词：球面密封结构 漏率预估 分子流 非线性有限元分析 实验验证 

分 类 号：V430[航空宇航科学与技术—航空宇航推进理论与工程]