30 cm离子推力器栅极组件热形变位移分析研究  

THE THERMAL DEFORMATION DISPLACEMENT ANALYSIS OF THE GRIDS FOR A 30 cm DIAMETER ION THRUSTER

作　　者：孙明明[1] 张天平[1] 贾艳辉[1] SUN Ming-ming;ZHANG Tian-ping;JIA Yan-hui(Science and Technology on Vacuum Technology and Physics Laboratory,Lanzhou Institute of Physics,Lanzhou 730000,China)

机构地区：[1]兰州空间技术物理研究所真空技术与物理重点实验室,兰州730000

出　　处：《真空与低温》2017年第6期349-354,共6页Vacuum and Cryogenics

基　　金：真空低温技术与物理重点实验室基金(6142207030103)

摘　　要：栅极组件是影响离子推力器束流加速引出的核心部件,其在工作过程中随着热量累积形成的热形变位移是影响工作性能的关键因素。采用有限元分析方法对30 cm离子推力器三栅极组件随工作时间变化导致的热形变位移进行了模拟,重点对栅极间距变化过程进行了模拟计算,并对单个栅极达到温度平衡的时间进行了模拟,预估了三栅极组件的冷态启动时间,并对栅极组件在工作期间内随温度变化造成的打火风险进行了预估。The grids assembly is the key component which influences the ion beam acceleration and extraction of ion thruster,and the thermal deformation displacement caused by heat accumulation during work process,which will influence the performance of ion thruster.FEM(Finite Element Method)is used in this paper to simulate the thermal deformation displacement variation of three-grids assembly with working time.Focusing on distance change is calculated and the temperature balance time is simulated.Warm-up time of the grids and the risk of short circut of the grids with time variation are estimated in this paper.

关 键 词：离子推力器 栅极组件 热形变位移 

分 类 号：V439.4[航空宇航科学与技术—航空宇航推进理论与工程]