摘要
K形金属密封是液氧/煤油发动机液氧管路系统中经常使用的金属密封结构,其密封性能关系着发动机能否可靠工作。针对自紧式K形金属密封组件,采用非线性有限元方法,基于局部理想粗糙度等效简化,研究了密封机理。仿真结果再现了密封接触面的形成模式,论证了"压力自紧式"密封特征和可重复使用特性,并以密封接触面积和平均接触应力为指标,获得了密封性能与拧紧力矩的敏感性关系。
The K-shaped metal sealing component is used frequently in the liquid oxygen pipeline system of LOX/kerosene rocket engine. Its sealing performance straightly relates with the reliability of the engine. Based on the nonlinear finite element method （FEM） and the equivalent simplification of local roughness, the sealing mechanism of self-tightened K-shaped seal component is acquired. Numerical simulations have reproduced the sealing formation mode of contact surfaces, and demonstrated the characteristics of ＂pressure-actuated＂ and reusable performance. According to the total contact area and average contact stress, the sensitivity between sealing performance and assembly moment is obtained.
出处
《火箭推进》
CAS
2013年第6期35-41,共7页
Journal of Rocket Propulsion
基金
国家863项目(2013AA702302)
