流体机械2024，Vol.52Issue(6)：76-82,98,8.DOI:10.3969/j.issn.1005-0329.2024.06.010
高压自紧式聚酰亚胺垫片密封性能影响因素分析及结构优化
Analysis of factors affecting the sealing performance of high-pressure self-tightening polyimide gasket and structural optimization
摘要
Abstract
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.关键词
聚酰亚胺/自紧密封/优化设计/高压/高精密密封Key words
polyimide/self-tightening seal/optimal design/high pressure/high-precision sealing分类
机械制造引用本文复制引用
郑娆,刘丽静,李双喜,刘登宇..高压自紧式聚酰亚胺垫片密封性能影响因素分析及结构优化[J].流体机械,2024,52(6):76-82,98,8.基金项目
国家重点研发计划项目(2018YFB2000800) （2018YFB2000800）
