Failure Analysis and Design Improvement of Some Ignitor
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摘要:针对某点火器在试验过程中发生管体破碎和输出压强峰值较高的问题，分析了导致该工作故障的可能原因，认为点火过程中药柱内外通道压差过大导致药柱压碎后增大了燃面，从而使压强异常升高。对药柱挡板结构进行了优化设计，以期减小药柱内外通道的压差，并通过对点火过程的流场仿真验证了其可行性。最终试验结果表明改进措施有效，输出压强峰值满足设计要求，提高了点火器工作的安全性和可靠性。
Abstract:Aimed at the problem of tube crushing and high output peak pressure of an ignitor, the possible reasons for the failure were analyzed. It was speculated that the pressure difference between the internal and external channels of the grain was too large, which led to the increase of combustion surface after grain crushing , then the pressure was risen unusually. The back plate structure was optimized to reduce the pressure difference between the internal and external channels of the grain, and the feasibility of this method was verified by simulating the flow field during ignition. The verification test proves that the improvement measures are effective, and the output peak pressure value meet the design requirement, the safety and reliability of the ignitor are improved.
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