C波段制冷接收机充气系统
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摘要
充气系统是给制冷接收机干空气腔体提供新鲜干燥空气、排出陈旧气体以防止水汽在真空窗表面遇冷凝结而影响观测的气动系统。某26 m射电望远镜C波段制冷接收机的馈源在杜瓦外部,故该接收机的充气系统将馈源设计为干空气腔体,通过充气机提供干燥空气,使用气体缓冲器作为辅助气源用于在充气机停止工作时补充提供干燥空气,以小的泄漏排出馈源腔体内的陈旧气体。该气动系统能很好地避免C波段制冷接收机真空窗口表面结冰,在自动控制下的充气系统也可以很好地补偿腔体内压的变化,使得整个充、排气过程更加稳定,真空窗口表面保持干燥。
The aerating system is a pneumatic system which supplies fresh dry air to and vents old air from the dry air cavity,so it can avoid the vapor freezing on the vacuum window surface,which affects observation. The feed of C-band cryogenic receiver in a 26 m telescope is outside of the Dewar,so the feed of the aerating system is designed as a dry air cavity. The system uses an inflator to supply dry air and the air buffer as an auxiliary inflator to supply dry air when the inflator stops operation. It vents old air with small leakage. This aerating system can avoid vacuum window freezing very well and the pneumatic system can offset the pressure variation of feed cavity by automatic control. As a result,aerating and venting are carried out stably and the vacuum window keeps dry.
The aerating system is a pneumatic system which supplies fresh dry air to and vents old air from the dry air cavity,so it can avoid the vapor freezing on the vacuum window surface,which affects observation. The feed of C-band cryogenic receiver in a 26 m telescope is outside of the Dewar,so the feed of the aerating system is designed as a dry air cavity. The system uses an inflator to supply dry air and the air buffer as an auxiliary inflator to supply dry air when the inflator stops operation. It vents old air with small leakage. This aerating system can avoid vacuum window freezing very well and the pneumatic system can offset the pressure variation of feed cavity by automatic control. As a result,aerating and venting are carried out stably and the vacuum window keeps dry.
引文
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[3]李大志,王生旺,杨红梅. S/X波段低损耗波导真空窗技术研究[J].低温与超导,2011,39(12):64-67.
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[5]赵大鹏,陈务军,张丽梅.大型充气膜结构及膜材的发展概述[J].建筑施工,2008,30(2):135-139.
[6]王凯,陈卯蒸,马军,等.保持制冷接收机真空窗口干燥的充气系统[J].液压与气动,2016(12):31-36.
[7]姜玮东,方韬.充气式索膜结构工程及优化设计[J].低温建筑技术,2006(5):81-82.
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[2]陈卯蒸,刘奇,马军,等.大口径射电望远镜超宽带接收机技术发展[J].中国科学:物理学力学天文学,2017,47(5):35-47.
[3]李大志,王生旺,杨红梅. S/X波段低损耗波导真空窗技术研究[J].低温与超导,2011,39(12):64-67.
[4]王志杰,李大志. S/X波段制冷接收机结构设计[J].低温与超导,2008,36(5):73-77.
[5]赵大鹏,陈务军,张丽梅.大型充气膜结构及膜材的发展概述[J].建筑施工,2008,30(2):135-139.
[6]王凯,陈卯蒸,马军,等.保持制冷接收机真空窗口干燥的充气系统[J].液压与气动,2016(12):31-36.
[7]姜玮东,方韬.充气式索膜结构工程及优化设计[J].低温建筑技术,2006(5):81-82.
[8]赵大鹏.大型充气膜结构特性分析与高强膜材试验研究[D].上海:上海交通大学,2007.