金属粉末点火温度测试装置的设计与试验
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摘要
本文介绍了一种金属粉末点火温度测试装置的设计方案及实现过程,通过大功率直流电源加热点火丝,点燃附着在点火丝上面的粉末,以光电探测器测试光强变化过程作为点火过程的指标,通过红外热电偶测试点火丝未涂敷粉末部分温度,作为粉末点火时的温度。利用该装置对镁粉、稀土合金氢化物、硼镁合金Mg B2 3种粉末进行点火温度测试试验,点火温度分别为446℃、234℃、997℃,证明该方法能够满足粉末点火温度测试要求。
The design and realization process of an ignition temperature measuring device was proposed. The powder is ignited on the ignition wire through a high-power DC power supply. A photoelectric cell tests the change process of the brightness as the ignition process. The temperature of the wire without the powder is tested by the infrared thermocouple as the powder ignition temperature. The ignition temperature test of three powders of Mg powder, rare earth alloy hydride powder and MgB2 powder was tested with this device, the results were 446℃, 234℃ and 997℃ respectively. It proved that the method could meet the requirement of powder ignition temperature test.
The design and realization process of an ignition temperature measuring device was proposed. The powder is ignited on the ignition wire through a high-power DC power supply. A photoelectric cell tests the change process of the brightness as the ignition process. The temperature of the wire without the powder is tested by the infrared thermocouple as the powder ignition temperature. The ignition temperature test of three powders of Mg powder, rare earth alloy hydride powder and MgB2 powder was tested with this device, the results were 446℃, 234℃ and 997℃ respectively. It proved that the method could meet the requirement of powder ignition temperature test.
引文
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[2]余斌,杜成中.发射药点火燃烧测温技术探索研究[J].火炸药学报,2001,24(2):28-31.
[3]秦钊,Christian PARAVAN,Giovanni COLOMOBO,等.金属燃料在不同气氛中的点火温度[J].火工品,2014(4):24-27.
[4]郭洋.改性硼的制备、燃烧性能及应用研究[D].长沙:国防科技大学,2014.
[5]Thorlabs Inc.DET10A(M/OL)Si biased detector user guide[Z/OL].2015.3:14.https://www.thorlabschina.cn/cart/basket/download Zip.cfm?fileName=DET10ASupportDocumentation.zip.
[6]李刚,钟英鹏,苑春苗,等.基于着火敏感性的镁粉防爆方法研究[J].东北大学学报(自然科学版),2007,28(12):1 775-1 778.
[7]张杏芬.国外火炸药原材料性能手册[M].北京:兵器工业出版社,1991.