Electromagnetic induction heating assisted supersonic plasma spraying gun device

An electromagnetic induction heating, supersonic plasma technology, applied in induction heating devices, induction heating, coating and other directions, can solve the problems of difficult melting of high melting point powder, low spraying speed, easy burnout of nozzles, etc., to increase the spraying surface , Increase the spraying temperature and enhance the effect of the spraying effect

CN113930708APending Publication Date: 2022-01-14QINGDAO UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2022-01-14

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Abstract

The invention provides an electromagnetic induction heating assisted supersonic plasma spraying gun device. The electromagnetic induction heating assisted supersonic plasma spraying gun device comprises a tungsten rod serving as a cathode, a nozzle serving as an anode, an atomization device and an electromagnetic induction heating device. By adopting a single-cathode-single-anode structure, high spraying temperature can be achieved by effectively utilizing electric arcs, the atomization device at the nozzle can effectively enhance the spraying effect and conduct nozzle cooling, the electromagnetic induction heating device can conduct temperature rise, and high-melting-point powder can be better melted.
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Description

technical field

[0001] The invention relates to the field of plasma spraying, in particular to a design scheme of a supersonic plasma spraying gun device assisted by electromagnetic induction heating. Background technique

[0002] Plasma arc spraying technology is one of the important technologies in equipment remanufacturing. Compared with other spraying technologies, the plasma arc spraying technology uses a plasma arc driven by direct current as a heat source to heat materials such as ceramics, alloys, and metals to a molten or semi-molten state, and sprays them on the surface of the processed workpiece at high speed. A method of forming a firmly adhered surface layer, characterized by high production efficiency and good coating quality, which can melt various feed powders such as metals, carbide ceramics and oxide ceramics.

[0003] The plasma arc spraying gun is a plasma generator, its performance is directly related to the coating quality, spraying efficiency, sprayin...

Examples

Embodiment Construction

[0025] The inventive device such as figure 1 As shown, it includes a gun body 1, a rectangular coil 2 of an electromagnetic induction heating device, and a nozzle 3 with an atomizing device. The electromagnetic induction heating device includes an upper cold water pipe 4 , a rectangular heating coil 5 , a lower cold water pipe 6 , a fixing frame 7 and a wire interface 8 . The nozzle device with the atomizing device comprises an air sleeve 9 , a nozzle connector 10 and a nozzle 11 .

[0026] The working principle of the spray gun is that the tungsten cathode is connected to the gun body 1, the working gas generates a plasma arc through the tungsten cathode and the nozzle anode, and the powder is sent axially to the gun body through the powder feeding pipe, and is heated by plasma heating and electromagnetic induction heating device 2. It is heated to a molten state for the second time and reaches supersonic speed. It is atomized by the atomizing device and sprayed out from the...