低温连接器防结冰正压防护技术研究  

Study of anti-icing positive pressure protection technology for cryogenic connector

作　　者：甄恩发 刘照智 梁秋立 王建秋[1] 于慧洁[1] 纪晶晶 Zhen Enfa;Liu Zhaozhi;Liang Qiuli;Wang Jianqiu;Yu Huijie;Ji Jingjing(Beijing Institute of Space Launch Technology,Beijing 100076,China)

机构地区：[1]北京航天发射技术研究所

出　　处：《低温工程》2019年第6期49-55,共7页Cryogenics

摘　　要：为了解决低温连接器结冰影响脱落的问题,在低温连接器结冰敏感部位设计了一种正压防护罩,用于制造正压防护环境,以此阻隔结冰敏感部位与环境湿空气接触而结冰,进而消除结冰对低温连接器脱落的影响。正压防护罩设计中充分考虑了低温连接器的结构特点,并结合防护罩内流场仿真分析结果进行优化,仿真结果表明防护罩内保护气体压力高于环境压力,满足正压防护的要求。在开展的对比试验中,采用正压防护罩的连接器在通液氮5 h后结冰敏感部位基本无霜,而未采用的则完全被冰霜覆盖,从而验证了该正压防护技术的有效性。In order to solve the problem of shedding effect of cryogenic connector caused by icing,a positive pressure shield was designed on the ice sensitive part of the cryogenic connector,which was used to create a positive pressure protective environment,so as to prevent the ice-sensitive part from freezing when it comes into contact with the humid air in environmental and then eliminate the effect of freezing on the shedding of cryogenic connector.The structural characteristics of the cryogenic connector were fully considered in the design of the positive pressure shield,and the optimization was carried out in combination with the simulation results of the flow field inside the shield.The simulation results show that the protective gas pressure inside the shield was higher than the ambient pressure,which meet the requirements of positive pressure protection.In the comparative test that were carried out,the connector with positive pressure protective shield was basically frost-free when it is filled with liquid nitrogen for 5 hours,while that without positive pressure protective shield was completely covered by frost,thus verifying the effectiveness of the positive pressure protection technology.

关 键 词：低温连接器 防结冰 正压防护 

分 类 号：TB664[一般工业技术—制冷工程]