用于4K级闭式循环制冷机的电磁式可调J－T阀设计

A Design of The Electromagnetic Adjustable J-T Valve for 4K Closed Cycle Refrigerator

分析了Ｊ－Ｔ阀中气流的流动特性及相关参数的影响，给出了计算程序框图，并对用于４．４Ｋ／０．５Ｗ闭式循环制冷机的Ｊ－Ｔ阀进行了计算，得出了其通道孔径和长度的关系曲线及最佳参数。针对目前普遍采用的可调Ｊ－Ｔ阀的不足之处，提出了一种新型的电磁式可调Ｊ－Ｔ阀，论述了它的结构特点和作用。

This paper analysis the folw characteristics and the influence of relative parametersof the gas flow in J-T valve。The calculate procedure block diagram has been given。The curve of the length vs diameter of J-T valve has also been given。To overcome the disadvantages of present adjustable J-T valve,this paper discribes a new type electromagnetic adjustable J-T valve and rep-resent its structures and functions。