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A Cathode Structure of a Laminar Arc Plasma Generator

A technology of arc plasma and cathode structure, applied in the direction of plasma, electrical components, etc., can solve the problems of short cathode life, high cost, difficulty in meeting the stability requirements of laminar plasma arc, etc., and achieve extended working life and extended life , Accelerate the effect of promotion and application

Active Publication Date: 2011-12-07
四川金虹等离子技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Laminar plasma has high requirements on the stability of the arc, and the cathode structure of the arc plasma generator currently in public use is not conducive to producing a stable laminar plasma jet. Under the multiple influences of electric field, magnetic field and working gas flow field, this The structure is difficult to meet the stability requirements of the laminar plasma arc, and the life of the cathode is short and the cost is high

Method used

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  • A Cathode Structure of a Laminar Arc Plasma Generator
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  • A Cathode Structure of a Laminar Arc Plasma Generator

Examples

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Effect test

Embodiment 1

[0017] Implementation example 1: figure 1 The cathode column [1] in is made of tungsten alloy and connected to the cathode. The cathode cover [2] is made of red copper with good electrical and thermal conductivity. There is a clearance fit between the cathode column [1] and the cathode cover [2], and the inner wall of the cathode cover [2] has uniformly distributed teeth in the axial direction. Groove, as the airflow channel of the working gas [3]. This implementation example is applied to a 40-kilowatt nitrogen laminar arc plasma generator, which can produce a stable beam-like (length-to-diameter ratio greater than 100) laminar hot plasma jet, and the cathode column [1] can work continuously for more than 500 hours.

Embodiment 2

[0018] Implementation example 2: such as image 3 As shown, except that the cathode column [1] is made of red copper, and the top is embedded with tungsten or tungsten alloy, other structures and processes are exactly the same as those in Example 1.

Embodiment 3

[0019] Implementation example 3: such as Figure 4 As shown, the outer wall of the cathode column [1] is grooved as an air flow channel, and the inner wall of the cathode cover [2] is smooth. Other structures and processes are exactly the same as those in Examples 1 and 2, and the inner tube of the cathode column [1] can be passed into the cooling liquid. , to facilitate the heat dissipation of the cathode column [1] and prolong its life.

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Abstract

A cathode structure of a laminar arc plasma generator, which is composed of a cathode column [1] and a cathode cover [2], wherein the cathode column [1] can be made of tungsten, copper or graphite, and is used to generate an electric arc. The cathode cover [2] is made of red copper, which is used to reduce the influence of the electric field and magnetic field on the stability of the arc column and the cathode arc root, and can disperse the cathode column through the liquid and air flow cold liquid on the outer wall of the cathode cover [2] and the inner wall structure [1] on the heat. It is applied in the laminar arc plasma generator device, which can stabilize the arc column and prolong the life of the cathode column [1].

Description

technical field [0001] The invention discloses a cathode structure for a laminar arc plasma generator, which belongs to an arc thermal plasma generating device. Background technique [0002] DC atmospheric pressure arc plasma is the most widely studied and applied thermal plasma state. Among them, laminar arc plasma has stable fluidity, long high temperature zone, low noise, less entrainment of ambient gas, and axial parameters It has the advantages of small gradient, etc., and has a wide range of application prospects. Laminar plasma has high requirements on the stability of the arc, and the cathode structure of the arc plasma generator currently in public use is not conducive to producing a stable laminar plasma jet. Under the multiple influences of electric field, magnetic field and working gas flow field, this The structure is difficult to meet the stability requirements of the laminar plasma arc, and the life of the cathode is short and the cost is high. Contents of ...

Claims

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Application Information

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IPC IPC(8): H05H1/28H05H1/34
Inventor 朱华袁洁马再敏
Owner 四川金虹等离子技术有限公司
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