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.
low temperature sealingflexible graphite gasketscompression reboundmedium pressurecontact pressure
NETL
NSTL
万方数据
