摘要
为了掌握轨道电磁发射中电枢的电流熔蚀特性,对小口径电磁轨道发射装置进行了实验研究。实验装置为20 mm×20 mm,方形口径轨道电磁发射装置,通过控制发射实验中电枢出膛的速度,研究了电流幅值、电枢质量和转角厚度（载流能力）等因素对熔蚀的贡献。另外,基于电流幅值递增实验,总结了熔蚀程度的几种模型和相应的电流幅值范围。结果表明：不同的发射条件对电枢的熔蚀程度影响有所差异;电流分布是熔蚀产生的直接原因,能显著影响熔蚀程度;电枢质量对起始时刻的熔蚀有影响;电枢转角厚度对熔蚀的贡献不大（电枢载流能力足够的情况下）;随着电流幅值的增加,电枢表面熔蚀有从电枢中端偏下位置沿棱边向电枢中部和电枢头部延伸的趋势,在此过程中归纳出了3种熔蚀程度及其对应电流范围：轻度熔蚀,对应电流181-293.8 k A;中度熔蚀,对应电流293.8-320.8 k A;极度熔蚀,电流〉320.8 k A。
In order to grasp the armature erosion characteristic in railgun, a large number of launching experiments have been done with the small caliber armature. The caliber of railgun is 20 mm×20 mm, and then the distributions of several factors influencing the armature erosion are studied by controlling the armature muzzle velocity. Moreover, through a lot of current amplitude increasing experiments, several models of armature erosion are summarized and the corresponding current ranges are also given. The results show that the armature erosion is different with different launching conditions, and current distribution is the immediate cause of armature erosion, which can influence armature erosion drastically. The mass of armature can affect the start-up erosion, and the thickness of the armature leading comer basically have no effect on armature erosion as long as the current-carrying capability is enough. With the current magnitude increasing, there is a trend that armature erosion initiates the position between the armature central section and tailing, and then extends to the central section （the leading of the actual contact area） along the edge, when the current continue increasing, the melt-wave erosion can creep to the leading of armature nominal contact area. Three kinds of erosion models are concluded, which include mild erosion, moderate erosion and severe erosion, and the current ranges are 181-293.8 kA, 293.8-320.8 kA and more than 320.8 kA respectively.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2016年第9期2857-2863,共7页
High Voltage Engineering
基金
国家自然科学基金(51177055
51237007
51307068)
高等学校博士学科点专项科研基金(20120142120027)~~
关键词
电枢
电流集中
熔蚀
熔融波
影响因素
表面形貌
armature
current concentration
corrosion
melt-wave erosion
influence factor
surface topography
