液体火箭发动机燃料管道低温密封性能分析  

Research on Low-temperature Sealing Performance of Liquid Rocket Engine Fuel Pipeline

作　　者：谭杨 魏世军 姜楚华 陈俊华 武铭松 TAN Yang;WEI Shijun;JIANG Chuhua;CHEN Junhua;WU Mingsong(School of Mechanical Engineering and Mechanics,Ningbo University,Ningbo Zhejiang 315211,China;Ningbo Tiansheng Seal Co.,Ltd.,Ningbo Zhejiang 315302,China;College of Science and Technology,Ningbo University.Ningbo Zhejiang 315300,China)

机构地区：[1]宁波大学机械工程与力学学院,浙江宁波315211 [2]宁波天生密封件有限公司,浙江宁波315302 [3]宁波大学科学技术学院,浙江宁波315300

出　　处：《机械设计与研究》2024年第4期230-234,共5页Machine Design And Research

摘　　要：针对液体火箭发动机燃料和氧化剂管道的低温(-196℃)密封问题,对柔性石墨垫片的密封性能进行研究。通过低温压缩回弹性能仿真模拟了实验台加载和卸载过程中变形和压力的变化情况,根据其运行工况建立了30MP介质压力下的热结构耦合模型,对低温下柔性石墨垫片密封界面的接触压力进行分析,为后续的低温密封设计提供理论与试验依据,通过垫片的密封性能实验进行验证。研究结果表明:厚度的变化对压缩回弹曲线的影响较大,宽度和密度的影响较小;榫槽面法兰垫片接触应力沿径向较低,凹凸面法兰垫片接触应力较高,密封效果较好。The sealing performance of a flexible graphite gasket is studied for the low temperature(-196℃)sealing of liquid rocket engine fuel and oxidant pipelines.The deformation and pressure changes during loading and unloading of the test-bed are simulated by the low temperature compression resilience simulation.According to the operating conditions,a coupled thermal-structure model of 30MP medium pressure is established,and the contact pressure of the sealing interface of a flexible graphite gasket at low temperature is analyzed,which provides theoretical and experimental basis for subsequent low temperature sealing design.The sealing performance of the gasket is verified by the experiment.The research results indicate that change in the thickness has a significant impact on the compression rebound curve,while the influence of width and density is relatively small.The contact stress of the groove flange gasket is lower along the radial direction,and the contact stress of the concave and convex flange gasket is higher,so the sealing performance is better.

关 键 词：低温密封 柔性石墨 压缩回弹 介质压力 接触压力 

分 类 号：TH136[机械工程—机械制造及自动化]