液氦温区高频脉冲管制冷机研究  

Study on High-frequency Pulse Tube Cryocoolers Working in Liquid-helium Temperature Range

作　　者：陈六彪[1] 吴显林 刘旭明 王珏 席肖桐 周远[1,2] 王俊杰 CHEN Liu-Biao;WU Xian-Lin;LIU Xu-Ming;WANG Jue;XI Xiao-Tong;ZHOU Yuan;WANG Jun-Jie(Chinese Academy of Sciences Key Laboratory of Cryogenics,Technical Institute of Physics and Chemistry,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院低温工程学重点实验室理化技术研究所,北京100190 [2]中国科学院大学,北京100049

出　　处：《工程热物理学报》2020年第5期1073-1076,共4页Journal of Engineering Thermophysics

基　　金：国家重点研发计划项目(No.2018YFB0504603);国家自然科学基金项目(No.51706233,No.51427806,No.U1831203);中国科学院战略性先导科技专项(No.XDA15010400);中国科学院前沿科学重点研究计划(No.QYZDY-SSW-JSC028)。

摘　　要：研制的一台高频脉冲管制冷机最低温度3.47 K,为目前高频制冷机的最低记录。首先基于相位调节的角度对多路旁通的工作机制进行分析,进一步设计了由单级同轴型多路旁通结构演变而成的气耦合多级结构。设计的制冷机三级温度分布为:77 K,20 K和4 K。研制的样机在输入电功250 W,液氮提供12.1 W预冷量时,能够在5.2 K获得20 mW制冷量。若使用77 K高效制冷机替代液氮,整机功耗有望在385 W以内,效率高于此温区已报道的其他高频脉冲管制冷机。A high-frequency pulse tube cryocooler capable of obtaining 3.47 K has been developed,which is the lowest record of current high-frequency cryocoolers.Firstly,the working mechanism of multi-pass bypass is analyzed based on the phase adjustment,and the gas-coupled structure evolved from the single-stage coaxial multi-bypass structure is further designed.The designed three-stage temperature distribution of the cryocooler is:77 K,20 K and 4 K.The developed prototype can obtain a cooling capacity of 20 mW at 5.2 K when the input electric power is 250 W and the liquid nitrogen provides 12.1 W precooling capacity.If use a 77 K high-efficiency cryocooler to replace the liquid nitrogen,the power consumption of the whole system is expected to reach less than 385 W,and the efficiency is higher than other high-frequency pulse tube cryocoolers reported in the temperature zone.

关 键 词：脉冲管 液氦温区 多路旁通 高频 

分 类 号：TK123[动力工程及工程热物理—工程热物理]