Cathode structure of novel laminar plasma generator

Abstract

A cathode structure of a novel laminar plasma generator mainly comprises a cathode cover and a cathode body. The cathode cover is made of red copper materials, and therefore the influence of an electromagnetic field on a cathode arc root can be reduced, and the stability of an electric arc can be improved. Meanwhile, an air inlet formed in the inner wall of the cathode cover can provide tangential velocity component for work gas entering an arc column area, the axis of the air inlet and the bus of an inner hole of the cathode cover form a certain angle, and therefore an anode arc root is made to rotate on an anode, and the service life of the anode is prolonged. The cathode body can be made of wolfram with a high melting point or graphite to reduce the loss of the cathode body. The cathode structure is mainly applied to the laminar plasma generator, the electric arc can be stabilized, the service life of the cathode body and the anode can be prolonged, and therefore the usability of the laminar plasma generator is improved.

Description

technical field [0001] The invention discloses a novel cathode structure of a laminar flow plasma generator, which belongs to the field of thermal plasma generators. Background technique [0002] With the continuous development of social technology, people have higher and higher requirements for heat sources, and the traditional turbulent thermal plasma heat source has been difficult to meet the requirements of many applications. Therefore, due to its advantages of stable jet flow, high temperature zone, low noise, high energy density, less entrainment of ambient gas, and small axial gradient, laminar plasma has attracted great attention from researchers at home and abroad. However, the laminar plasma has high requirements on the stability of the arc, and there are few structures that can meet this performance in the published patents at home and abroad. Although the patent No. 201010191192.0 proposes a laminar flow plasma cathode structure, which can basically meet the req...

AI Technical Summary

Problems solved by technology

However, laminar plasma has high requirements on the stability of the arc, and there are few structures that can meet this performance in the published patents at home and abroad.

Although the patent No. 201010191192.0 proposes a laminar flow plasma cathode structure, which can basically meet the requirements of laminar flow plasma for arc stability, but when this structure is adopted, the anode ablation is particularly serious, and the service life of the anode is extremely short, making it difficult to prolong the arc. Time stable operation, high operating cost

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