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OA北大核心CSTPCD
Analysis of factors affecting the sealing performance of high-pressure self-tightening polyimide gasket and structural optimization
为了解决液体火箭发动机在异常工况下的密封失效问题,建立了发动机充气阀阀芯密封结构的有限元模型,分析了密封结构参数、加工误差及卡滞偏斜对充气阀阀芯密封性能的影响,并进行了试验验证.结果表明:综合考虑可加工性、密封效果,圆阀座是充气阀的首选结构;在不同圆角半径下,圆角半径在0.35～0.45 mm范围内使用效果最佳;平面度偏差及卡滞偏斜在0～0.07 mm范围内对密封效果和使用寿命几乎没有影响.本研究可为航天军工用高精密密封的设计和优化提供参考,有助于提高我国高精密密封的技术水平.
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.
郑娆;刘丽静;李双喜;刘登宇
北京化工大学 机电工程学院,北京 100029
机械工程
聚酰亚胺自紧密封优化设计高压高精密密封
polyimideself-tightening sealoptimal designhigh pressurehigh-precision sealing
《流体机械》 2024 (006)
76-82,98 / 8
国家重点研发计划项目(2018YFB2000800)
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