预冷波纹管自调式节流制冷器启动时间的实验研究

EXPERIMENTAL STUDY ON COOL-DOWN TIME OF SELF-REGULATED JOULETHOMSON COOLER WITH PRECOOLER

摘要: 与斯特林制冷机相比，微型节流制冷器以体积小、质量轻、启动快、高可靠性、成本低、无运动部件等优点，在红外制导武器系统中得到广泛应用。为了优化制冷器的启动时间和耗气量，设计了一种带有预冷级波纹管自调式快速节流制冷器。通过实验对比，该制冷器的启动时间比单级自调式节流制冷器快，耗气量比预冷级非自调式制冷器小。制冷器在常温下的启动时间为12 s@90 K、15 s@80 K，同时耗气量也得到了优化。

Abstract: Compared to the Stirling cooler，miniature Joule-Thomson cooler（J-T cooler）has the advantages of small size，light weight，short cool-down time，high reliability，low cost and the cold end without moving part，which is wildly applied in infrared seeker.In order to optimize cool-down time and gas consumption，designing a bellows self-regulated fast-cool-down J-T cooler with precooler.Compared to other kinds of J-T coolers by experiment，the J-T cooler with precooler cool down faster than the single self-regulated J-T cooler，and its’gas consumption is less than the non-self regulated J-T cooler with precooler.The cool down time of the J-T cooler with precooler is 12 s@90 K，15 s@80 K，and its’gas consumption is optimized.