Design and characteristics of a new type laminar plasma torch for materials processing

Xiuquan CAO (曹修全); Lin CHEN (陈林)

doi:10.1088/2058-6272/ab4c60

Plasma Science and Technology > 2020 > 22(1): 15402-015402. > DOI: 10.1088/2058-6272/ab4c60

Xiuquan CAO (曹修全), Lin CHEN (陈林). Design and characteristics of a new type laminar plasma torch for materials processing[J]. Plasma Science and Technology, 2020, 22(1): 15402-015402. DOI: 10.1088/2058-6272/ab4c60

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Design and characteristics of a new type laminar plasma torch for materials processing

School of Mechanical Engineering, Sichuan University of Science and Engineering, Zigong 643000, People's Republic of China

Funds: The authors appreciate the supports of the major project of Zigong Science and Technology Bureau (No. 2018YYJC13 and No. 2017DZ10), the Talents Introduction Project of Sichuan University of Science and Engineering (No. 2017RCL37) and the Sichuan Provincial Key Lab of Process Equipment and Control’s Project (No. GK201802).

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Received Date: June 20, 2019
Revised Date: October 07, 2019
Accepted Date: October 08, 2019

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Abstract

Abstract

Laminar plasma jet (LPJ) generated by laminar plasma torch (LPT) has a favorable temperature and velocity distribution. Thus, it is superior to the turbulent plasma jet in material processing. However, most of the reported LPTs usually operate at a relatively low output power with a relatively low arc voltage and thermal efficiency, which limits its capabilities. In this context, this paper attempts to design a new type of high-power LPT with a relatively low arc current and a high thermal efficiency. In the first section, the design principle of the main components is studied and discussed in detail, and a new high-power LPT is proposed. Then, the experimental characteristics of the proposed high-power LPT are examined. Experimental results reveal the following characteristics of the proposed LPT. (1) The max jet length of the proposed LPT reaches at 540 mm. (2) Its mean arc voltage is higher than 290 V when the LPT works with arc currents lower than 200 A, leading to an output power greater than 50 kW. (3) The mean thermal efficiency is higher than 50%. Lastly, the proposed LPT has been applied to spheroidize the aluminum oxide powers. The experiment results for the production of spherical powders show that the proposed LPT has a good characteristic for material processing.
- laminar plasma torch,
- design principles,
- high arc voltage with a low arc current,
- spheroidisation

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References (27)

References

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Design and characteristics of a new type laminar plasma torch for materials processing