等离子体焊接除尘装置设计与数值模拟  

Design and Numerical Simulation of Plasma Welding Fume Removal Devices

作　　者：吴仲伟[1] 夏金兵[1] 时惜今 WU Zhongwei;XIA Jinbing;SHI Xijin(Mechanical Engineering College,Hefei University of Technology,Hefei,230009;Department of Mechanical Engineering,Texas A&M University,College Station,77843)

机构地区：[1]合肥工业大学机械工程学院,合肥230009 [2]德克萨斯A&M大学机械工程系,卡城77843

出　　处：《中国机械工程》2019年第23期2862-2869,共8页China Mechanical Engineering

基　　金：国家自然科学基金资助项目（51305119)

摘　　要：基于等离子体放电吸附原理,提出吸尘滤尘荷电除尘新工艺来净化焊接烟尘,并设计了能实时跟踪焊接烟尘源的除尘装置。确定了两电极板的长度与间距等参数,对等离子体静电吸附装置进行了荷电计算与三维电场分析,研究了烟尘颗粒在电场中的运动轨迹及其变化规律;利用COMSOL软件进行仿真分析,讨论了烟尘粒径、入口气体流速和板间电压对烟尘颗粒吸附效果的影响。分析结果表明:板间电压在0.6~2.4 kV范围内,在电场中运动时间t≥0.1 s时,该除尘装置对0.1~1μm粒径的烟尘颗粒能够实现快速有效地吸附,且获得了显著的净化效果。Based on the principles of plasma discharge adsorption,a new technology of fume collection,fume filtration,charge and fume removal was proposed to purify welding fumes.A fume removal device was designed which might track welding fume source in real time,and parameters of length and spacing of two electrode plates were determined.By the charge calculation and three-dimensional electric field analysis of plasma electrostatic adsorption device,the motion trajectory and the change law of fume particles in electric field were studied,and COMSOL software was used to simulate and analyze the effects of particle sizes,inlet gas flow rates and inter-plate voltages on the adsorption efficiency of fume particles.The results show that when the inter-plate voltage is in the range of 0.6~2.4 kV,while movement time in the electric field is as t≥0.1 s,the fumes with 0.1~1μm particle size may achieve rapid and efficient adsorption,and resulting in significant purification.

关 键 词：焊接烟尘 等离子体 除尘 净化 

分 类 号：TG40[金属学及工艺—焊接]