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Double-discharge-mode plasma igniter with multi-anode structure

A discharge mode and plasma technology, applied in the power field, can solve problems such as poor ignition reliability, low ignition energy utilization rate, and small ignition energy, and achieve the effects of wide lean burn limit, high working pressure, and stable ignition

Inactive Publication Date: 2019-01-08
DALIAN NATIONALITIES UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing spark plug / igniter can be applied to large-space combustion chamber engines, and further solve the problems of low ignition energy, poor ignition reliability, and low ignition energy utilization rate when applied to natural gas engines, the present invention proposes the following technical solutions :

Method used

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  • Double-discharge-mode plasma igniter with multi-anode structure
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  • Double-discharge-mode plasma igniter with multi-anode structure

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Embodiment 1

[0017] Example 1: A dual-discharge mode plasma igniter with a multi-anode structure, the solution structure is as follows figure 2 As shown, it includes a long anode 2 located in the center, a plurality of short anodes 1 located around, a ground electrode 5, an anode insulation positioning sleeve 4 and a long anode 2 fastening nut; the long anode 2 is installed on the igniter The center position is fixed at the center position of the anode insulation positioning sleeve 4; the number of the short anodes 1 is more than two, which are arranged in a ring on the outside of the long electrode and installed on the anode insulation positioning sleeve 4; the ground electrode 5 is insulated The positioning sleeve 4 fixes the short anode 1 and the long anode 2 ; the long anode 2 fastening nut is used to fix the long anode 2 on the insulating positioning sleeve 4 . The lower end of the ground electrode 5 has a positioning flange 13 for installing the plasma igniter. According to needs, ...

Embodiment 2

[0018] Embodiment 2: A dual-discharge mode plasma igniter with a multi-anode structure, comprising a casing, a long anode 2, a short anode 1, an anode insulating positioning sleeve 4 and a ground electrode 5, and the ground electrode 5 is installed in the casing , the ground electrode 5 encloses a concave hollow cylinder, which is divided into two parts, the upper part includes a large diameter value maintaining section and a small diameter value maintaining section, and the lower part includes a first diameter value maintaining section 9 and a first diameter value gradually decreasing section 10 , the second diameter value maintenance section 11, the second diameter value gradually decreasing section 12, and the connection between the large diameter value maintenance section and the small diameter value maintenance section is formed by the ground electrode 5 due to the rapid reduction of the diameter value. The described insulating positioning sleeve 4 includes a positioning r...

Embodiment 3

[0022] Embodiment 3: This scheme involves a igniter mainly composed of a plurality of short anodes located around, a long anode located in the center, a ground electrode, an anode insulating positioning sleeve and a long anode fastening nut.

[0023] Since the igniter communicates with the combustion chamber of the engine, a combustible air-fuel mixture exists in the first ionization space and the second ionization space.

[0024]When working, the power supply first supplies power to the short anode with a lower voltage (for example: below 10,000 volts), and at this time the long anode is not powered; (At this time, it is equivalent to the ground electrode)-anode insulating positioning sleeve-short anode and a dielectric barrier discharge occurs, and the gas in the first ionization space is ionized under the action of an external electric field to generate free electrons and positively charged cations. Balanced plasma, increased chemical reactivity. Since the voltage is lower...

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Abstract

The invention discloses a double-discharge-mode plasma igniter with a multi-anode structure, and belongs to the field of power. In order to achieve the effect that an existing spark plug / igniter canbe applied to a large-space combustion chamber engine, an insulation positioning sleeve comprises a positioning ring which can be buckled with an annular wall for positioning, the positioning ring isprovided with a short anode annular hole and a long anode open hole, moreover, a short annular groove which seals downwards and contains short anodes is formed below the short anode annular hole by using an insulating material, the multiple short anodes are limited in the short annular groove, the multiple short anodes are separated through an insulating medium, the short annular groove extends into a first diameter value maintaining section at the lower portion, a long anode penetrates out of a long anode open hole and extends to an outlet section, the short annular groove surrounds the longanode, and a hollow portion is formed between the long anode and the short annular groove. The effect that by adopting an dielectric barrier discharge-arc discharge combined discharge mode, the advantages of imbalanced plasma for wide lean-burn limit and large reaction activity can be combined is achieved.

Description

technical field [0001] The invention belongs to the field of power and relates to a dual discharge mode plasma igniter with a multi-anode structure. Background technique [0002] As a clean energy, natural gas has been widely used as engine fuel. In the field of vehicle power, the number of passenger cars and heavy-duty vehicles fueled by CNG is increasing; in the field of ship power, CNG and LNG-powered ships have become the key research directions in the "Made in China 2025" plan. Compared with gasoline, natural gas as a gas fuel requires more ignition energy, which makes it difficult to use a single spark plug to ignite natural gas in actual use even with a small-bore vehicle natural gas engine, so gasoline has to be used to ignite the engine. normal work. This leads to a series of problems such as system complexity, increased cost, and decreased reliability. Therefore, it is necessary to adopt a new ignition technology and a relatively simple structure to achieve effi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02P23/00H05H1/24H05H1/32
CPCF02P23/00H05H1/2406H05H1/32
Inventor 宋鹏
Owner DALIAN NATIONALITIES UNIVERSITY
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