低温加注阀关闭状态确认试验研究

为验证采用传感器监测加注阀入口容腔压力对加注阀关闭状态判断的可行性,建立了低温加注阀关闭状态确认试验系统。研究加注阀无泄漏和加注阀预制泄漏通道两种状态下通过孔板模拟加注连接器顶杆中心小孔排放后加注阀入口容腔压力变化及连接器脱落前后加注阀泄漏量的变化,开展了加注阀关闭状态确认方法原理性试验和数值仿真研究。研究结果表明:加注阀无泄漏和存在泄漏时从压力传感器能明显监测到压力变化,且连接器脱落前后泄漏量变化较大,数值仿真结果与试验结果吻合较好。

Experimental study on confirmation of closed state of cryogenic loading valve

In order to verify the feasibility of using the sensor to monitor the inlet cavity pressure of the loading valve to judge the closing state of it,a confirmation test system was established.Under the two states of no leakage and prefabricated leakage,the change of the pressure in the inlet cavity of the loading valve after the discharge of the central hole of the connector and the change of the leakage before and after the connector falls off are studied,and the principle test and numerical simulation of the confirmation method of the closing state of the loading valve are carried out.The results show that the pressure change can be obviously monitored from the pressure sensor when there is no leakage or leakage in the loading valve,and the leakage changes greatly before and after the connector falls off.The numerical simulation results are in good agreement with the experimental results.