Arc Heated Plasma Torch

Abstract

The invention discloses an electric arc heating plasma spray gun, which comprises a cathode head, a replaceable anode nozzle, an anode seat, a conductive gun core, a gun body, an insulating sleeve and a water guiding core; The sleeve is set on the conductive gun core, and the cavity formed between the conductive gun core and the insulating sleeve is provided with a spiral air flow channel, which communicates with the anode nozzle and the air intake channel on the gun core; the conductive gun core, water guide The water-cooling channels of the core, the anode seat and the gun body form a water-cooling circulation system, and water-cooling ribs are set on the inner wall of the water-cooling cavity of the anode seat to increase the water-cooling contact area and improve the cooling efficiency of the spray gun; at the same time, the traditional anode nozzle is disassembled The anode seat and the replaceable anode nozzle are formed, and the cathode is split into the cathode head and the conductive gun core, which reduces the replacement cost of the cathode and anode electrodes after ablation, and prolongs the service life of the arc heating plasma spray gun.

Description

technical field [0001] The invention belongs to the technical field of thermal plasma generation, in particular to an electric arc heating plasma spray gun. Background technique [0002] Plasma is the fourth state of matter, which contains a large number of electrons, ions and neutral particles. These particles are in a state of local thermal equilibrium. They have high energy density, high brightness, high electrical conductivity, high thermal conductivity and other characteristics. These The nature determines that plasma has a great application space in the field of aerospace. [0003] The arc-heated plasma propulsion device uses the high-temperature arc formed by the DC discharge between the cathode and the anode to heat the propellant, and the propellant is heated to 1.0×10 by the arc after entering the confined channel 4 Ionization occurs after a very high temperature above K, and then flows through the expansion section of the nozzle that doubles as the anode, and aft...

AI Technical Summary

Problems solved by technology

[0004] But at present, the arc heating plasma propulsion device is still in the experimental stage. The negative and positive electrodes of the traditional plasma generator experimental device adopt an independent cooling system, which has a complex structure and low cooling efficiency. Therefore, the electrodes are easy to be ablated and the electrodes need to be replaced. complex and costly

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