一种地外天体样品真空密封结构  

A NEW EXTRA TERRESTRIAL SAMPLES VACUUM SEALING STRUCTURE

作　　者：陈静[1] 纪明[2] 王琎[2] 王春勇[2] 李海志[2] 孙亮[2] CHEN Jing;JI Ming;WANG Jin;WANG Chun-yong;LI hai-zhi;SUN Liang(Department of Information&Control Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;Lanzhou Institute of Physics,Lanzhou 730000,China)

机构地区：[1]西安建筑科技大学信息与控制工程学院,西安710055 [2]兰州空间技术物理研究所,兰州730000

出　　处：《真空与低温》2018年第4期279-282,共4页Vacuum and Cryogenics

摘　　要：国外已开展多次地外天体采样返回任务,我国首次对外星体采样返回任务—嫦娥五号探测器即将实现地外天体样品的采集及返回,可靠的样品密封技术是维持地外天体样品原态,保证地面数据分析准确性的关键。设计了一种以铟银合金—钛合金刀口为主密封、橡胶圈辅助密封的真空密封方案用于地外天体样品密封。并通过地面环境试验验证,结果表明该方案密封漏率优于5×10^(-9)Pa·m^3·s^(-1),能够实现地外天体样品高纯密封,防止地外天体样品被污染。The mission of returning extra-terrestrial objects has been carried out in many foreign countries.The first returning samples mission in China is the Chang’e V detector,it is about to collect and return lunar samples.Reliable sample sealing technology is to maintain the original state of the extra-terrestrial samples and to analyze data on ground accurately.This paper describes a vacuum sealing technology which is indium alloy and knife-edge as primary vacuum seal and silicon rubber as redundant seal against primary seal failure to seal the extra-terrestrial sample.Results have been verified by ground environment experiments,and results show that the seal leakage rate is better than 5×10^-9 Pa·m^3·s^-1.This sealing structure can prevent samples from being contaminated.

关 键 词：地外天体 样品采样返回 刀口密封 冗余密封 

分 类 号：TB79[一般工业技术—真空技术]