本文比较系统地总结了Gifford-McMahon(G-M)制冷循环的低温泵系统的故障诊断与分析方法,提出了低温泵在使用过程中应注意的问题与解决方案,并结合实例详细描述了解决故障的方法、工具和诊断过程。本文的方法可以为低温泵系统的故障诊断和排除提供实际的指导作用。 This paper systematically summarizes the fault diagnosis and analysis methods of the cryogenic pump system of the Gifford-McMahon (GM) refrigeration cycle, puts forward the problems and solutions that should be paid attention to in the process of using the cryogenic pump, and describes the solution of the fault Methods, tools and diagnostics. The method in this paper can provide practical guidance for the fault diagnosis and elimination of cryogenic pump system.