A normally closed one-shot isolation valve was developed here to isolate the high-pressure gaseous propellant in micropropulsion systems. The valve has the ability to greatly reduce the amount of metal debris entering and blocking the flow path. Inside the one-shot valve is a hollow-designed starting needle. The starting needle sends two symmetrically placed gas inlets at the top of the needle to the upstream of the isolation device to open the valve. During this process, metal debris is directed downstream of the isolation device by the high-pressure gaseous propellant. This process can greatly reduce the amount of metal debris entering and blocking the flow path through the gas inlets. The one-shot valve was opened at a pressure of 10.6 MPa with a power of 5.6 W. Thermal analysis of the base was conducted during the valve opening process. The volume flow through the starting needle was measured before and after activation. The performance of the valve was mainly analyzed by the volume flow ratio before and after activation.

在此开发了一种常闭单触发隔离阀，用于隔离微推进系统中的高压气态推进剂。该阀具有大大减少进入和阻塞流路的金属碎片的能力。单发阀内部是空心设计的启动针。起始针将两个对称放置的气体入口从针的顶部发送到隔离装置的上游，以打开阀门。在此过程中，金属碎片被高压气态推进剂引导到隔离装置的下游。该过程可以大大减少金属碎屑进入和阻塞通过进气口的流路的数量。在10.6 MPa的压力下以5.6 W的功率打开单发阀。在阀打开过程中对基座进行热分析。在激活之前和之后测量通过起始针的体积流量。阀门的性能主要通过激活前后的体积流量比进行分析。