等离子体雾化用等离子体发生器动静态特性研究*

doi:10.13385/j.cnki.vacuum.2021.05.11

真空 ›› 2021, Vol. 58 ›› Issue (5): 66-71.doi: 10.13385/j.cnki.vacuum.2021.05.11

等离子体雾化用等离子体发生器动静态特性研究^*

杨彤, 尹政鑫, 邱吉尔, 杨胜源, 张清波, 余德平

四川大学机械工程学院,四川成都 610065

收稿日期:2020-12-24 出版日期:2021-09-25 发布日期:2021-09-23
通讯作者: 余德平,教授,博导。
作者简介:杨彤（1996-）,女,安徽省马鞍山市人,硕士。
基金资助:
*四川省科技厅高新技术领域重点研发项目,项目号：2020YFG0111

Research on the Static and Dynamic Behavior on the Plasma Torch Used for Plasma Atomization

YANG Tong, YIN Zheng-xin, QIU Ji-er, YANG Sheng-yuan, ZHANG Qing-bo, YU De-ping

Department of Mechanical Engineering,university of Sichuan, Chengdu 610065, China

Received:2020-12-24 Online:2021-09-25 Published:2021-09-23

摘要/Abstract

摘要： 等离子体雾化法是当前球形金属粉末制备最具前景的方法之一,但由于其使用的关键等离子体发生器产生的射流不稳的问题,制约着金属粉末制备批次的稳定性。等离子体射流的不稳定性主要来源于电弧的大尺度分流,本文采用实验与信号分析的方法对电压信号进行时域、频域和时频分析来判断弧根的运动,揭示其动静态特性,以实现对等离子体发生器工作状态的实时监测。研究结果表明：反转电极等离子体发生器呈现上升型伏安特性,电压随电流的增大而增大,随着气流量的增大而升高;等离子体发生器在大电流情况下因产生了大尺度分流导致电压波动剧烈,大尺度分流造成的锯齿波状的信号为低频信号,频率在0.2到3Hz之间;采用短时傅里叶变换对电弧电压信号进行实时分析,可以准确地监测大尺度分流的产生,从而指导等离子体发生器工作参数的调整。

关键词: 等离子体雾化, 等离子体发生器, 伏安特性, 大尺度分流

Abstract: Plasma atomization is considered as one of the most promising method for manufacturing spherical metal powders.However, because of the instability of the plasma jet generated by the key plasma torch, the uniform quality and fixed yield of spherical powders are not guaranteed. The instability of plasma jet mainly results from the large-scale shunting of the arc. In this paper, the experimental investigation of the plasma torch applied for plasma atomization was carried out and corresponding voltage signal was analyzed in time, frequency and time-frequency domains to judge the movement of arc root and reveal its static and dynamic volt-ampere characteristics, so as to realize the real-time monitoring of the working state of the plasma torch. The results show that the reverse polarity plasma torch has the rising volt-amperecharacteristics, with its arc voltage increasing with the increase of the arc currentand gas flow rate. The sawtooth wave of the arc voltage, caused by large-scale shunt, is a low frequency signal with the frequency in the range of 0.2~3Hz. The short time Fourier transformwas used to analyze the arc voltage signal in real-time, which can be used to accurately monitor the generation of large scale shunting and guide the adjustment of the working parameters of the plasma torch.

Key words: plasma atomization, plasma torch, voltage-ampere characteristics, large-scale shunting

中图分类号:

O533

杨彤, 尹政鑫, 邱吉尔, 杨胜源, 张清波, 余德平. 等离子体雾化用等离子体发生器动静态特性研究^*[J]. 真空, 2021, 58(5): 66-71.

YANG Tong, YIN Zheng-xin, QIU Ji-er, YANG Sheng-yuan, ZHANG Qing-bo, YU De-ping. Research on the Static and Dynamic Behavior on the Plasma Torch Used for Plasma Atomization[J]. VACUUM, 2021, 58(5): 66-71.

参考文献

[1] 范立坤. 增材制造用金属粉末材料的关键影响因素分析[J]. 理化检验: 物理分册, 2015, 51(7): 480-482.
[2] 何杰, 马士洲, 张兴高, 等. 增材制造用金属粉末制备技术研究现状及展望[J]. 机械工程材料, 2020, 44(11): 46-52.
[3] NGO T D, KASHANI A, IMBALZANO G, et al.Additive manufacturing (3D printing): A review of materials,methods, applications and challenges[J]. Composites Part B: Engineering, 2018, 143: 172-196.
[4] 岳灿甫, 王永朝, 雷竹芳,等. 真空气雾化制粉技术及其应用[C]// 2012船舶材料与工程应用学术会议论文集. 2012.
[5] 余勇, 曾归余, 肖明清, 等. 不同工艺对真空气雾化Ni粉粒度的影响研究[J]. 粉末冶金工业, 2015, 25(1): 38-41.
[6] 梁京, 陈岁元, 董欢欢, 等. EIGA法制备激光3D打印用TC4合金粉末[J]. 东北大学学报(自然科学版), 2017, 38(4): 497-501.
[7] 黄传收, 柳中强, 吴苑标, 等. 电极感应熔炼气雾化制备Ti-6Al-4V合金粉末的性能及其表征[J]. 稀有金属材料与工程, 2019, 48(10): 3302-3308.
[8] 王晨, 赵霄昊, 马逸驰, 等. 超高转速等离子旋转电极工艺制备钬铜球形粉末的研究[J]. 粉末冶金技术, 2020, 38(3): 227-233.
[9] 蔡超, 宋波, 薛鹏举,等. 等离子体旋转电极法制备Ti6Al4V粉末表面特性研究[C]// 中国有色金属学会,中国工程院,中南大学. 中国有色金属学会,中国工程院,中南大学, 2016.
[10] 金园园, 贺卫卫, 陈斌科, 等. 球形难熔金属粉末的制备技术[J]. 航空制造技术, 2019, 62(22): 64-72.
[11] RAO L, RIVARD F, CARABIN P.Thermal plasma torches for metallurgical applications[M]. John Wiley & Sons, Inc., 2013.
[12] 高正江, 周香林, 李景昊, 等. 高性能球形金属粉末制备技术进展[J]. 热喷涂技术, 2018, 10(3): 1-9.
[13] ALAGHEBAND A, BROWN C.Plasma atomization goes commercial[J]. Metal Powder Report, 1998, 53(11): 26-28.
[14] MOSTAGHIMI J, BOULOS M I.Thermal plasma sources: How well are they adopted to process needs?[J]. Plasma Chemistry and Plasma Processing, 2015, 35(3): 421-436.
[15] PFENDER E.Thermal plasma technology: Where do we stand and where are we going?[J]. Plasma Chemistry and Plasma Processing, 1999, 19(1): 1-31.
[16] DUAN Z, HEBERLEIN J.Arc instabilities in a plasma spray torch[J]. Journal of Thermal Spray Technology, 2002, 11(1): 44-51.
[17] DOWIER J L, GINDRAT M, HOLLENSTEIN C, et al.Time-resolved imaging of anodic arc root behavior during fluctuations of a DC plasma spraying torch[J]. IEEE Transactions on Plasma Science, 2001, 29(3): 494-501.
[18] 何振亚. 数字信号处理的理论与应用[M]. 北京: 人民邮电出版社, 1983.
[19] 程乾生. 数字信号处理[M]. 北京: 北京大学出版社, 2003.
[20] 过增元, 等. 电弧和热等离子体[M]. 北京: 科学出版社, 1986.
[21] ZHUKOV F M, ZASYPKIN I M.Thermal plasma torches design, characteristics, application[M]. Cambridge: Cambridge International Science Publish, 2006.

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等离子体雾化用等离子体发生器动静态特性研究^*

Research on the Static and Dynamic Behavior on the Plasma Torch Used for Plasma Atomization

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