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真空 ›› 2019, Vol. 56 ›› Issue (1): 1-5.doi: 10.13385/j.cnki.vacuum.2019.01.01

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DN1250 液氮屏蔽型制冷机低温泵的研制与性能测试

赵月帅,孙立臣,邵容平,闫荣鑫,孙 伟,李 征   

  1. 北京卫星环境工程研究所,北京 100094
  • 收稿日期:2018-02-26 出版日期:2019-01-25 发布日期:2019-02-19
  • 作者简介:孙立臣,研究员。
  • 基金资助:
    国家自然基金(U1537109)。

Design and performance test of DN1250 LN2 refrigerator cooled cryopumps

ZHAO Yue-shuai, SUN Li-chen, SHAO Rong-ping, YAN Rong-xin, SUN Wei, LI Zheng   

  1. Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China
  • Received:2018-02-26 Online:2019-01-25 Published:2019-02-19

摘要: 北京卫星环境工程研究所研制了四台 DN1250 口径的液氮屏蔽型制冷机低温泵。该低温泵已 经作为大型空间环境模拟系统的高真空主泵投入使用,满足了热真空试验对高真空的需求,取得了良好 的效果。本文主要针对该低温泵的三种主要性能指标(抽速、降温时间和渡越容量)的设计方法、性能测 试方法以及结果进行介绍,测试结果表明该系列低温泵对氮气的抽速达到了 57000L/s,降温时间约 330min,渡越容量达到 3.0×105Pa·L。

关键词: 低温泵, 抽速, 降温时间, 渡越容量, 测试方法

Abstract: Four refrigerator cooled cryopumps (DN1250 LN2) were designed and manufactured by BISEE. The pumps were used in space environment simulation system to meet the demand of the high vacuum in thermal vacuum test. The design and test method for pumping speed, cool down time and crossover were introduced in this paper. A test system was built to test the main performance of the cryopumps. The experimental results show that the pumping speed for N2 of the pump is up to 57000 L/s, the cool down time is about 330min, and the crossover is over than 3.0 ×105Pa·L.

Key words: cryopump, pumping speed, cool down time, crossover, test method

中图分类号: 

  • TB752+.53
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