纵向气流对电弧稳定性的影响  

Influence of Longitudinal Airflow on the Stability of Arc

作　　者：母婷佑 魏文赋[1] 鲁超 谢文汉 杨泽锋 吴广宁[1,2] MU Tingyou;WEI Wenfu;LU Chao;XIE Wenhan;YANG Zefeng;WU Guangning(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 610031,China;The Institute of Frontier Science and Technology,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学电气工程学院,成都610031 [2]西南交通大学前沿科学技术研究院,成都610031

出　　处：《高电压技术》2022年第7期2727-2736,共10页High Voltage Engineering

基　　金：国家自然科学基金(52077182,U19A20105,51837009)。

摘　　要：电弧作为能量传输媒介在焊接、冶金、电接触等领域得到广泛关注与应用。实际工况下,干扰气流无法避免,导致电弧弧根跳跃、弧柱弯曲,电弧的稳定性大幅下降,严重影响了其应用的可靠性。基于上述问题,引入纵向气流,对干扰气流作用下的电弧稳定性进行调控。通过搭建实验平台与仿真模型,定量分析了纵向气流速度、电极间隙对电弧稳定性的影响。结果表明:纵向气流可以限制电弧弧根位置,降低电弧电压波动,提高电弧的稳定性;随着电极间隙的增大,电弧稳定性变差,采用纵向气流对电弧稳定性进行调控的难度提升;纵向气流速度与电弧电压波动存在“U型”关系,随着纵向气流速度的增大,电压波动程度总体呈先减小后增大趋势。As an energy transfer medium in welding,metallurgy,electrical contact and other fields,arc has been widely concerned and applied.Under working conditions,the disturbing airflow cannot be avoided,which leads to arc root jumping,arc column bending,and the stability of the arc decreases significantly,which seriously impairs the reliability of the application.Based on the above problems,this paper uses longitudinal airflow to regulate the stability of arc under the action of disturbing airflow.By building experimental platform and simulation models,the effects of longitudinal airflow level and electrode gap on the arc stability are quantitatively analyzed.The results show that the longitudinal airflow can limit the arc root position,reduce the arc voltage fluctuation and improve the arc stability.Increasing electrode gap will reduce the arc stability and increase the difficulty of stability control.Besides,there is a“U-shaped”correlation between the arc voltage fluctuation with the longitudinal airflow.With the increase of longitudinal airflow,the fluctuation degree of arc voltage tends to decrease first and then increase.

关 键 词：电弧 电弧稳定性 气流 调控方法 电弧电压 电弧运动特性 

分 类 号：TM501.2[电气工程—电器]