Analysis of factors affecting the sealing performance of high-pressure self-tightening polyimide gasket and structural optimization
To address sealing issues in liquid rocket engines during abnormal conditions,a finite element model for the sealing structure of the engine's inflation valve core was established,and the effects of various factors such as sealing structure parameters,machining errors,and sticking deflection on the valve's sealing performance were analyzed.And experimental validation was also conducted.The results show that a circular valve seat is the first choice structure of the inflation valve considering both processability and sealing effect.Under different fillet radii,the optimal performance is achieved when the fillet radius is in the range of 0.35～0.45 mm.Flatness deviation and sticking deflection within the range of 0 to 0.07 mm have negligible effects on sealing performance and service life.This research methodology can provide a reference for designing and optimizing high-precision seals for Chinese aerospace and military industry and helps to improve the technological level of Chinese high precision seals.
国家科技期刊平台
NSTL
万方数据
