微型雷管药高比对输出威力的影响

Investigation into Charge Height Ratio of Micro-Detonator on the Output Detonation Pressure

为了适应MEMS引信微型传爆序列的需求,针对微型雷管装药高度比对输出威力的影响开展了专门研究。改变装药直径为0.9 mm、装药高度为3 mm的微型雷管中起爆药与猛炸药装药高度比,用猛铜压阻传感器对爆轰输出压力进行测定,得到微型雷管中起爆药的临界高度为0.36 mm。当起爆药高度为1.65 mm时,微型雷管爆轰压力值最大,为10.3 GPa;当起爆药高度小于1.65 mm,HMX炸药高度大于1.35 mm时,随着起爆药高度的减小,猛炸药高度的增加,微型雷管的爆压值减小;当起爆药高度大于1.65 mm、HMX炸药高度小于1.35 mm时,随着起爆药高度的增加,猛炸药高度的减小,微型雷管的爆压值也减小。初步得出了羧铅起爆药和猛炸药的最佳高度比范围为0.69~2.26。

In order to accommodate to the needs of micro-explosive train in MEMS fuze,this paper carried out a specific study about the influence of charge height on the output detonation pressure in micro-detonator.The charge diameter is 0.9 mm,total height is 3 mm.The charge ratio of primary explosive and high explosive was to be changed.The output detonation pressure was measured by manganin piezoresistance method.In the micro-detonator,the critical height of primary explosive PbN6 is 0.36 mm.When the primary explosive PbN6 height is 1.65 mm,the micro-detonator has the maximal output detonation pressure 10.3 GPa.When the primary explosive PbN6 height is less than or more than 1.65 mm,the high explosive HMX height is less than or more than 1.35 mm,and the output detonation pressure of the micro-detonator is reduced.The range of the primary explosive PbN6 and the high explosive HMX is 0.69～2.26.