Authors: R.A. Okulov, E.S. Konovalova

Title of the article: Infuence of plasma torch anode wall thickness on heat removal efficiency of water cooling system

Year: 2025, Issue: 6, Pages: 75-86

Branch of knowledge: 2.8.8. Geotechnology, Mining machines (engineering)

Index UDK: 621.791:669.056.9

DOI: 10.26730/1816-4528-2025-6-75-86

Abstract: Plasma torches are widely used in the mining industry, for example, for coating the surfaces of equipment components, such as drilling tools, crusher components, and conveyor belt rollers. Plasma torches are also used for surface modification, which is especially important during component repair and restoration. A plasma system includes a cooling unit, the efficiency of which determines its operating time. During practical work, it is important to ensure the proper operation of plasma equipment. This article discusses the water cooling system of the MAK-6.5 system – a secondary plasma torch designed for modifying components and applying coatings. The objective of this study is to investigate the effect of the temperature of the cylindrical section of the plasma torch anode assembly on the temperature of the liquid at the outlet of the water cooling system. A computer model of the plasma system was created that adequately describes the real process. The study was conducted using the finite element method. SolidWorks Flow Simulation was used as the package implementing the finite element method. The results of the computer experiment were confirmed by a full-scale experiment. A comparative analysis showed satisfactory convergence. Seven options for measuring anode thicknesses with greater thickness are presented, ranging from 2.0 to 8.0 mm in 1 mm increments. The finite element method is based on the fundamental laws of heat transfer (Fourier, Newton-Richmann, Stefan-Boltzmann) and the conservation equation. The scientific novelty of this study lies in its comparative measurement of the wall thickness of the MAK-6.5 anode assembly, ensuring the most efficient heat-removal water cooling system, preventing the formation of an air-vapor zone, and anode wall burnout. As a result of this study, recommendations were developed for manufacturers and consumers of plasma torch equipment on the selection of anode wall thickness. The findings presented in this article have practical implications for improving plasma equipment used in mining operations

Key words: plasma torch anode assembly heat transfer water cooling system wall thickness finite element method mining equipment

Receiving date: 27.10.2025

Approval date: 14.11.2025

Publication date: 18.12.2025

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