超流氦低温系统减压降温泵组的设计及室温性能试验研究  

Design of pump set and experimental study of room temperature performance superfluid helium cryogenic system

作　　者：王金坤 倪清 赵乾坤 Wang Jinkun;Ni Qing;Zhao Qiankun(The Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201210,China;Shanghai Technology University,Shanghai 201210,China)

机构地区：[1]中国科学院上海高等研究院,上海201210 [2]上海科技大学,上海201210

出　　处：《低温工程》2022年第6期56-63,共8页Cryogenics

基　　金：上海市市级科技重大专项(NO.2017SHZDZX02)资助。

摘　　要：为了研究减压降温泵组对氦气抽气性能,以及在不同工况下的系统控制能力,研制一套减压降温泵组用以验证其室温下的抽气特性,并搭建了一种氦减压降温泵组室温性能的测试平台。试验测试内容包括泵组对氦气的抽速、压力稳定性和极限压力等,测试结果表明,在所抽站点氦气压力为500—3100 Pa稳定运行时,泵组所控的压力稳定性可在±10 Pa范围内;同时泵组可满足负载160 W@2 K、80 W@1.8 K、10 W@1.5 K的室温工况需求;泵组对所抽站点的极限压力可达到250 Pa,试验验证了所选的减压降温泵组性能满足并优于设计需求。Based on the design theory of decompression and cooling pump,a helium pump was developed to test the suction characteristics at room temperature,and the helium pump was used to control the inlet pressure at a reasonable level.A room temperature test facility was designed which was used for pressurization.Under different levels of flow,accurate test was achieved.The flow characteristics of pump set with different flow parameters were studied,including pumping speed,pressure stability and ultimate pressure.Experimental results show that when the helium pressure of the test platform is stabilized from 500 Pa to 3100 Pa,the pressure stability controlled by the pump set can be within 10 Pa.At the same time,the pump set can meet the requirements of room temperature working conditions with heat loads of 160 W@2 K,80 W@1.8 K and 10 W@1.5 K.And the ultimate pressure of the pump set to the pumping station can reach below 250 Pa.It is verified by the test that the performance of the developed decompression and cooling pump set is better than the design requirements.

关 键 词：减压降温泵 选型设计 性能测试 抽气特性 

分 类 号：TB661[一般工业技术—制冷工程]