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Plasma generator and method for prolonging plasma generator cathode life

A plasma and generator technology, applied in the direction of plasma, etc., can solve the problems of small cathode ablation area, limited cathode life, and insufficient utilization of cathode materials.

Inactive Publication Date: 2010-12-08
YANTAI LONGYUAN POWER TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the applicant's invention patent No.00245774.1 discloses a metal electrode for a plasma generator. The electrode is made of silver or silver-based alloy, which effectively improves the life of the cathode compared with the previous graphite electrode, but the electrode is still There is a small area of ​​cathode ablation, and the cathode material cannot be fully utilized, thus limiting the improvement of the cathode life; another example is that Australia has developed a plasma generator for burning bituminous coal that uses nitrogen to protect the electrode, but this device needs to be matched with complex manufacturing. nitrogen equipment

Method used

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  • Plasma generator and method for prolonging plasma generator cathode life
  • Plasma generator and method for prolonging plasma generator cathode life
  • Plasma generator and method for prolonging plasma generator cathode life

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Embodiment Construction

[0016] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0017] like Figure 1A and Figure 1B As shown, in a traditional plasma generator, the cathode head 101 is used as a pole for emitting electrons, and the electron-emitting region on its surface has a very high temperature. Under the influence of high-temperature evaporation and chemical action, even under the condition of water cooling Next, the electron emitting area (arc starting point) on the surface of the cathode head 101 is consumed, and after a period of work, a pit 102 will be ablated on the surface of the cathode head. Because the plasma generator is a central axis type plasma generator, the pit is located at the coincidence point of the central axis of the cathode and the anode, and is affected by the electric field, magnetic field, and aerodynamic force, the diameter of the pit will not be too large, and it will always be Ablate do...

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Abstract

The invention relates to a plasma generator and a method for extending service life of a cathode of the plasma generator. The plasma generator comprises the cathode and the anode which are arranged suitably for generating arc discharge, and is characterized in that a center axes of the cathode is deviated from a center axes of the anode. The plasma generator also comprises a driver which is used for relative rotation of the cathode and the anode.

Description

technical field [0001] The present invention relates to a plasma generator and a method for extending the life of the cathode of the plasma generator. Background technique [0002] The general plasma generator is a central axis type, which has the characteristic that the arc starting point of the cathode coincides with the central axis of the anode. The principle of central axis plasma generator to generate plasma is: the cathode head is connected to the negative pole of the power supply, the anode is connected to the positive pole of the power supply, and the power supply delivers a constant current. When the cathode head slowly leaves the anode, as the voltage builds up, the two poles A high-temperature plasma torch is formed immediately, specifically, the electrons emitted by the cathode head break down the air to form a plasma torch. [0003] For central axis plasma generators, cathode life is an important challenge. [0004] Before the disclosure of the present invent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05H1/34H05H1/48
Inventor 唐宏纪书信李本伟陈学渊林淑胜
Owner YANTAI LONGYUAN POWER TECH
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