针对G—M型脉管制冷机传统配气方式中压缩机配气量耗功和不可逆损失较大等缺点，本文提出一种带有中间气库的主动式配气系统。理论分析表明，和传统配气方式相比，主动式配气系统可显著降低压缩机配气量耗功和配气系统熵产。基于自行研制的G—M型脉管制冷机开展实验。当中间气库开启时间比例为30％时，制冷机可获得较低的制冷温度且对制冷性能影响较小。主动式配气系统提高了阀门寿命并且改善了配气系统运行工况。
In order to overcome the disadvantages of traditional gas distribution system of G-M type pulse tube cryocooler, such as high irreversible losses during the intake and exhaust processes and power consumption, a novel active gas distribution system with middle stage reservoir is proposed. Theoretical analysis shows that active distribution system can reduce the power consumption of the compressor due to the reduction of irreversible losses during the intake and exhaust processes. The self-made pulse tube cooler with the active gas distribution system was tested. When the proportion of opening time of the middle stage reservoir is 30%, cryocooler reaches a lower temperature with minor decrease of cooling power. Besides, active gas distribution system increases the life time for valves.
参考文献
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