一种耐高温阀芯密封材料在阀门上的应用
王立君1,2 黄爱清1,2 唐妹芳1,2

(1.上海空间推进研究所,上海 201112; 2.上海空间发动机工程技术研究中心,上海 201112)

PFA; 阀芯; 耐高温材料; 性能试验

An application of sealing material for high-temperature resistance valve core in valve
WANG Lijun1, 2, HUANG Aiqing1, 2, TANG Meifang1, 2

(1.Shanghai Institute of Space Propulsion, Shanghai 201112, China; 2.Shanghai Engineering Research Center of Space Engine, Shanghai 201112, China)

PFA; valve core; high-temperature resistance material; performance test

备注

随着深空探测技术的发展,对深空探测器的环境温度要求越来越高,姿控发动机用电磁阀的最高工作温度由原先的80 ℃上升为140 ℃。为满足深空探测技术对阀门的高温环境要求,进行了两组试验,通过常温电磁阀的动作试验、验收级热循环试验(10～90 ℃)、鉴定级热循环试验(0～100 ℃)以及流阻试验进行比对,筛选出可耐高温的阀芯密封材料(PFA)。采用该阀芯密封材料的阀门顺利通过高温电磁阀的热循环试验(-15～135 ℃)、热真空试验(-15～135 ℃)、力学试验以及50万次寿命试验的验证,试验过程中以及试验后,采用该阀芯密封材料的阀门行程、漏率和响应特性等性能参数稳定。证明该阀芯密封材料可满足深空探测系统对阀门的高温环境要求。

Two experiments are conducted to meet the requirements of deep space exploration technology for high-temperature environment of valves.The sealing material PFA for high-temperature resistance valve core was chosen by means of valve action test at normal temperature, thermal cycling test in 10～90 ℃, thermal cycling test in 0～100 ℃and flow resistance test.The valve made from PFA successfully passed the thermal cycling test in -15～135 ℃, vacuum thermal test in -15～135 ℃, mechanical test and life test of 500 000 times.Its performance parameters such as spool stroke, leak rate and response characteristic stable in the experiment, which prove that the valve core sealing material can meet the high-temperature environmental requirements of deep space exploration technology for valves.This research can also provide a reference for design of other high-temperature valves.