重复推进滑动电接触的试验研究  

Experimental study of sliding electrical contacts in a multi-shot railgun

作　　者：刘传谱[1,2] 袁伟群[1] 严萍[1] 孙鹞鸿[1] 孙连华[1,2] 

机构地区：[1]中国科学院电工研究所,北京100190 [2]中国科学院研究生院,北京100190

出　　处：《强激光与粒子束》2010年第4期923-926,共4页High Power Laser and Particle Beams

基　　金：中国科学院电工研究所所长基金项目

摘　　要：重点研究了低速条件下重复推进对电枢与导轨的接触状态、初速等的影响。试验采用6路时序脉冲功率电源、10 mm方口径装置和U型单体铝电枢,利用建立的试验系统进行重复推进试验。试验结果表明:随着重复次数增加,电枢和导轨的接触状态趋于良好,电枢启动时间提前,初速增大。说明在电枢低速运动条件下,重复试验中导轨表面遗留富含铝的堆积物对下一次试验的滑动电接触有积极作用。The study of sliding electrical contacts between the rails and the armature is of great importance for a multi-shot railgun.A 10 mm square-bore railgun has been developed for the experimental study,with a pulsed-power supply of a 0.2 MJ capacitor bank.In the multi-shot experiment,a number of aluminum armatures are launched under the same condition with the deposit covering the copper rails not polished.The result indicates that the state of the armature-rail interface in a multi-shot railgun tends to be much better and there is less arc erosion than in a single-shot one.The armature in the latter shot starts to move earlier than in the former,and the muzzle velocity increases with the number of shots.It is concluded that the layer of deposit generated from the former shots,rich in aluminum element,may get remelted to decrease the friction coefficient during the sliding process and play an active role to accelerate the armature in a multi-shot railgun.

关 键 词：电磁推进系统 滑动电接触 重复试验 堆积物薄层 电枢 

分 类 号：TM910[电气工程—电力电子与电力传动]