低温阀门试验系统改进及流程优化研究

Research on Improvement of Cryogenic Valve Test System and Process Optimization

针对运载火箭低温阀门多次出现低温性能试验压力超差的问题,开展了阀门合格率影响因素研究,从试验系统温度差异、过滤器压力差变化以及系统压力分布等方面进行了仿真分析。结果表明,试验系统温度不匹配以及贮箱至阀门管路压力差偏大是低温性能试验阀门压力超差的主要原因。提出了试验系统改进和试验流程优化方案,通过试验验证,系统改进方案有效,产品性能满足设计要求,产品一次低温性能合格率提升到80%以上,缓解了高密度发射下型号产品交付的紧张局面。

The cryogenic performance test pressure of carrier rocket cryogenic valve is out of tolerance for many times.The factors influencing the valve qualification rate are studied for this problem.The simulation analysis is carried out from the temperature difference of the test system,the change of the flow resistance of the filter and the pressure distribution of the system.It is found that the temperature mismatch of the test system and the large flow resistance of the pipeline from the tank to the valve are the main reasons for the over pressure of the cryogenic performance test valve,and the improvement scheme of the test system and the optimization scheme of the test process are proposed.Through the test verification,the system improvement is effective,the product performance meets the design requirements,and the qualification rate of cryogenic performance of the product is increased to more than 80%,which alleviates the tense situation of model product delivery under high-density launch.