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冲击片雷管轴向距离能量耗散失效分析
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陕西应用物理化学研究所

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Failure analysis of axial distance energy dissipation of Exploding Foil Initiator
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Shaanxi Applied Physics and Chemistry Research Institute,Xi’an,710061

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    摘要:

    从冲击片雷管换能界面装配结构的角度,基于提高冲击片雷管一致性和可靠性的目的,结合冲击片雷管内部结构设计和产品装配过程,采用针对冲击片雷管因材料本身表面小型突起导致接触面不平整或装配问题而产生的两种轴向距离所产生的影响进行了探究,并通过不同电压下的发火试验及感度试验,针对两种间隙对冲击片雷管作用过程的影响进行了验证和分析,结果表明:加速膛-桥箔轴向距离会导致电爆能量横向散失,进而影响飞片冲击药柱端面能量大小并引起聚酰亚胺薄膜撕裂拉伸,1700V-25μm为其临界发火电压与临界距离,随着轴向距离的持续增加,爆炸箔逐渐失效;加速膛-药柱轴向距离会影响飞片飞行的平稳程度以及撞击药柱速度,随着距离增加,飞片飞行距离增长,飞行平稳度降低,到达药柱端面速度降低,难以激发药柱,应控制在0.3mm以内。

    Abstract:

    From the perspective of the assembly structure of the energy exchange interface of the impact plate detonator, with the aim of improving the consistency and reliability of the impact plate detonator, combined with the internal structure design and product assembly process of the impact plate detonator, this study explores the effects of two axial distances caused by the uneven contact surface or assembly problems of the impact plate detonator due to small protrusions on the material surface. Through ignition tests and sensitivity tests under different voltages, The influence of two types of gaps on the action process of impact plate detonators was verified and analyzed. The results showed that accelerating the axial distance between the chamber and the bridge foil would cause lateral loss of electric explosion energy, thereby affecting the energy magnitude of the end face of the flying plate impact charge column and causing tearing and stretching of the polyimide film, 1700V-25 μm is its critical firing voltage and critical distance, and as the axial distance continues to increase, the explosive foil gradually fails; Accelerating the axial distance between the chamber and the grain can affect the smoothness of the flying piece and the speed of the impact on the grain. As the distance increases, the flying distance of the flying piece increases, the smoothness of the flight decreases, and the speed of reaching the end face of the grain decreases, making it difficult to excite the grain. Therefore, it should be controlled within 0.3mm.

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历史
  • 收稿日期:2023-12-12
  • 最后修改日期:2024-03-22
  • 录用日期:2024-05-08
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