高技术通讯2025，Vol.35Issue(10)：1120-1132,13.DOI:10.3772/j.issn.1002-0470.2025.10.009
气液深冷介质典型动压端面密封性能对比
Comparison of seal performance typical dynamic pressure end face of gas-liquid cryogenic media
摘要
Abstract
Aiming at the four cryogenic media of liquid rocket engine fuel(oxygen,methane,hydrogen)and nitrogen,a fluid lubrication model suitable for both liquid and gaseous states is developed for the noncontacting mechanical seals used in turbopumps.Taking the physical properties of the cryogenic gas and liquid phase media into consider-ation,the sealing performance of four typical hydrodynamic grooves end face seals in the gas and liquid phases are comparatively studied.The effect of operating conditions and groove depth on the sealing performance of mechanical seals are systematically studied.The results show that liquid oxygen and liquid methane have greater opening force than the gaseous ones,but the mass leakage rate and power consumption are relatively large.The gaseous hydrogen has greater opening force and fluid film axial stiffness than liquid hydrogen.It is recommended to apply gas film seals because of its higher stiffness and lower mass leakage rate.The liquid nitrogen can be used as a substitute for liquid oxygen,and gaseous nitrogen as a substitute for gaseous oxygen,gaseous methane and gaseous hydrogen to carry out corresponding film-forming characteristics experiments.The spiral groove shows a stronger hydrodynamic effect than other grooves,but leads to a larger leakage rate.The leakage rate of the herringbone groove is relatively smaller than other grooves in both liquid and gaseous phase.关键词
深冷介质/动压型槽/有限单元法/密封性能/涡轮泵Key words
cryogenic media/dynamic groove/finite element method/sealing performance/turbopump引用本文复制引用
杨任义,孟祥铠,赵文静,马艺,彭旭东..气液深冷介质典型动压端面密封性能对比[J].高技术通讯,2025,35(10):1120-1132,13.基金项目
国家自然科学基金面上项目(52175193)和叶企孙科学基金(U2241246)资助项目. （52175193）
