极端工况服役的运载火箭高性能阀门制造基础

高性能阀门是运载火箭增压输送系统中的关重部件。该类阀门服役于深低温、强负载极端工况，零件材料特性、配合副界面行为较常规环境具有显著差异性，致使常规设计的阀门在极端工况下性能极易超差，甚至功能失效，已成为制约我国运载火箭高密度发射和新一代运载火箭研制的瓶颈因素之一。开展极端工况服役的运载火箭高性能阀门制造基础研究，在揭示极端工况阀门配合副材料/结构等多影响因素与服役性能关联关系基础上，探明极端工况阀门配合副接触行为对导向/密封性能的影响机制，突破材料-结构精准匹配的导向磨损与密封泄漏抑制技术，开发极端工况高性能约束的深低温阀门关键件精准加工工艺，最终通过典型极端工况服役阀门的集成优化与实验验证，为实现极端工况服役阀门高可靠制造提供重要理论和技术基础，满足运载火箭对深低温阀门的需求，亦为提升我国运载火箭安全性与可靠性提供技术支撑。

High-performance valve is the key component in the pressurized transporation system of launch vehicle. As that this kind of valve is served under the extreme conditions of deep low temperature and strong load, the material characteristics of parts and the interfacial behavior of matching pair are significantly different from that under the conventional environment, which makes the performance of valve with conventional design method easily does not meet the requirements under extreme conditions, or even fail. In this way, it has been becoming one of the bottleneck factors restricting the high-density launch of launch vehicle and the development of new generation launch vehicle. Fundamentals of manufacturing technology for the high-performance valves of launch vehicle served under the extreme conditions are carried out. Firstly, the association relationship between the influencing factors of material/structure for matching pair and the service performance of valve under extreme condition will be studied, and the mechanism for the interfacial behavior of matching pair influencing the performance of guide/seal for valve will be proved. After breaking through the technology for avoiding the guide wear and the seal leakage based on the precise matching of material and structure, the precision processing technology for key parts of valve can be developed with the high-performance constraint under the extreme conditions, and finally the integrated optimization and the experimental verification are carried out on a typical valve under the extreme conditions. The research achievements will provide important theoretical and technical basis for the high reliable manufacturing of high-performance valves for launch vehicle, meet the demand of valve from launch vehicle and can also provide technical support for improving the safety and reliability of launch vehicle.