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致冷机低温泵的抽气效率主要取决于冷阵的结构,为了提高抽气效率,在结构设计上所需采取的措施往往是互相矛盾的,难以协调,致使目前的致冷机低温泵对H_2、H_e、N_o这类非凝性气体的抽气效率都较低,这一弱点对小口径致冷机低温泵尤为突出.本文着重分析了冷阵结构对致冷机低温泵抽气效率和其它性能的影响因素,提出了结构设计的基本原则,介绍了作者依此而设计出的一种新型冷阵结构的致冷机低温泵.结构设计是借助了蒙特卡洛方法而完成的.作者在口径为φ150毫米的致冷机低温泵中使用了这种结构,进行了性能测试,实验结果同理论计算值基本一致.
Cryogenic pump cryogenic pump suction efficiency depends mainly on the structure of the cold array, in order to improve the suction efficiency, the structural design required to take measures are often contradictory and difficult to coordinate, resulting in the current cooler cryogenic pump H_2, H_e, N_o such as non-condensable gas extraction efficiency is low, the weakness of the cryogenic pump for small-diameter cryogenic pump is particularly prominent.This paper focuses on analysis of the cooling array cryogenic pump suction efficiency and The basic principle of the structure design is put forward and a new type cryogenic cryocooler with cryogenic array structure is introduced.The structural design is accomplished by means of Monte Carlo method. This structure was used in the cryogenic pump with a diameter of φ150 mm, and the performance test was carried out. The experimental results are basically the same as the theoretically calculated values.