长距离爆震式点火枪设计  

Design of long distance detonation ignition

作　　者：韩岳达 于洋[1] 王智新[2] 于浩楠[2] 韩永馗[2] 郭红杰[3] 梁国柱[3] 

机构地区：[1]东北林业大学机电工程学院,哈尔滨市150040 [2]机械科学研究院哈尔滨焊接研究所,150028 [3]北京航空航天大学,100083

出　　处：《焊接》2015年第9期67-71,76,共5页Welding & Joining

摘　　要：介绍了可燃气体爆震及爆震波点火技术的产生及应用,简要分析了火焰切割设备现有点火技术的优劣及爆震波点火技术在火焰切割设备点火系统中应用的实际意义。根据C-J可燃气体爆震理论建立了氧丙烷爆震波点火的简化理论分析模型,对氧丙烷爆震性能进行了初步的理论计算及分析。结果表明,爆震波点火技术可以由低压混合气体产生高温高压的爆震产物,爆震波以高马赫数速度传播,迅速到达割炬的点火位置。根据分析结果,设计了简单的氧丙烷爆震波远距离点火枪模型,并进行了点火验证试验,试验结果表明爆震波点火技术简单、可靠,供气压力要求低,点火延迟时间短,能量输入低,点火距离长,且具备良好的同步性、重复性及简单的结构形式,适用于大厚度火焰切割设备的点火系统。The detonation of combustible gas and the application of detonation wave ignition technology were introduced,and the advantages and disadvantages of the existing ignition technology of flame cutting equipment and practical significance of the application of detonation wave ignition technology in flame cutting equipment ignition system were analyzed briefly.According to the C- J theory of combustible gas,a simplified theoretical model of oxygen- propane detonation wave ignition were established and preliminary theoretical calculation and analysis of oxygen- propane detonation performance have been carried out.The result shows that the detonation can produce the high temperature and high pressure with low pressure gas mixture,detonation wave propagates with speed of high Mach number,and then reach the position of cutting torch ignition quickly.According to the results of the analysis,the simple remote detonation wave ignition model of oxygen- propane were designed.The experimental results show that this technique is simple and reliable,and has low air pressure requirement,short ignition delay,low the energy input and long the ignition distance.It is of good synchronization,repeatability,simple structure,and it is applicable to the ignition system of heavy thickness flame cutting equipment.

关 键 词：火焰切割 爆震波 远距离点火枪 

分 类 号：TG481[金属学及工艺—焊接]