In this Paper, the mechanic properties and sealing performance of the aircraft fabric rubber seal during flight are studied. First, the mechanic parameters, geometric structure, loading method of different aircraft cabin door fabric rubber seals, and gas conditions are analyzed. Second, the modified gas leakage rate formula of fabric rubber seal within wide ranges of temperature and gas pressure is derived based on the previous gas leakage rate formula of fabric rubber seal and the gas leakage rate experimental results. Then, the gas leakage rate prediction method of multicontact sealing surfaces is established. Finally, the variation law of the aircraft gas leakage rate with the altitude are determined based on the configuration number of the aircraft fuselage doors and the finite element results of the aircraft door seals. The research results will provide reliable scientific guidance for the mechanical performance evaluation and sealing performance prediction of fabric rubber seals.

本文研究了飞机织物橡胶密封件在飞行过程中的力学性能和密封性能。首先，分析了不同机舱门织物橡胶密封件的力学参数，几何结构，加载方法以及气体条件。其次，根据以前的织物橡胶密封件的气体泄漏率公式和气体泄漏率实验结果，推导了在宽温度和气压范围内的改进的织物橡胶密封件气体泄漏率公式。然后，建立了多接触密封面的漏气率预测方法。最后，根据飞机机身门的配置数量和飞机门密封条的有限元结果，确定了飞机气体泄漏率随高度的变化规律。