CN201018192Y

CN201018192Y - Improved surface discharge spark plug electrode structure

Info

Publication number: CN201018192Y
Application number: CNU2007200191019U
Authority: CN
Inventors: 史景章
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-03-03
Filing date: 2007-03-03
Publication date: 2008-02-06
Anticipated expiration: 2017-03-03

Abstract

The utility model discloses an improved electrode structure of a surface discharge spark plug, which comprises a central electrode mounted in a metal shell and insulated with the metal shell via an insulator. The metal shell is electrically connected a side electrode which takes circular shape. A support bracket is provided between the side electrode and the metal shell top, which consists of three metal strips and uniformly is distributed between the outskirt of the side electrode and the metal shell top edge. The insulator has a skirt protruding out of the metal shell top, through which the central electrode terminal can go and extend out of the electrode circular center. The internal wall of the side electrode is provided with a concave inward circular slot while a plurality of concave slots corresponding to the circular slot are provided on the central electrode surface. Boasting the advantages of strong ignition strength, balanced firepower, uneasy carbon deposition and long service life, the spark plug of the structure can be applied in all kinds of power generation engines and automotive spark plugs.

Description

Improved creeping discharge spark plug electrode structure

Technical field

The utility model relates to a kind of spark plug.

Background technology

The lateral electrode of plain edition creeping discharge spark plug is concentric with central electrode, formed a multidirectional ring electrode, use creeping discharge type spark plug, phenomenons such as easy " bridging " that occurs of common creeping discharge spark plug, " bridging " can be avoided, the danger of early stage igniting can also be avoided.But common creeping discharge spark plug does not almost have the skirt section, and the hot cell is also very little, is a kind of soft plug, can only be used on the two stroke engine, be used in poor effect on the above engine of four-stroke-cycle, the performance significantly sacrificing can not satisfy the needs of various model engines.The subject matter of its existence is: (1) common creeping discharge type spark plug sparking position is a pinch in, and its spark accessibility is very poor; (2) electric spark is skipped at the insulator end surface, and spark energy can not fully be delivered in the gaseous mixture; (3) the insulator end is under normal operation, and temperature is very low, forms carbon deposit easily, hinders normal ignition.

Summary of the invention

The technical problems to be solved in the utility model be overcome that existing creeping discharge spark plug ubiquity accommodation is narrow, electrode life is short, the easy drawback of carbon deposit, provide that a kind of wide accommodation, sparking power are strong, the sparking-plug electrode of long service life, to improve the whole service life of spark plug.

For solving the problems of the technologies described above, the utility model comprises and being installed in the metal shell and the central electrode by insulator and metal shell insulation, be electrically connected lateral electrode on the metal shell, its design feature is that described lateral electrode is circular ring type, between lateral electrode and metal shell top, be provided with bracing frame, insulator has the skirt section of protruding the metal shell top, and described central electrode end passes insulator tip and stretches out the ring-like center of lateral electrode.

As to improvement of the present utility model, described bracing frame is made up of three lattice framing sheet metallic objects, and is uniform between lateral electrode outer edge and outer edge, metal shell top.

As to further improvement of the utility model, described lateral electrode internal ring wall is provided with the ring-like groove of indent, is provided with many equidistant grooves corresponding with ring-like groove position, indent on the central electrode cylinder.

After adopting said structure, owing between lateral electrode and metal shell top, be provided with bracing frame, the central electrode end passes insulator tip and stretches out the ring-like center of lateral electrode, central electrode and lateral electrode can be inserted in the combustion chamber more deeply, the electrode gap position is near the centre, combustion chamber, fire combustion distance is shortened, and electrode sparking power is strong, and burning rate is accelerated; Simultaneously, lateral electrode is away from the metal shell top, make spark plug have the spark plug skirt section of protrusion, colder charge air flow rushes at the spark plug skirt section during use, make the spark plug skirt section be able to quick cooling, when this has just guaranteed that spark plug is worked under high-power operating mode, overheated and the incandescent ignition of reason insulator tip not, on the other hand, because spark plug skirt section, central electrode is longer, more area is exposed in the burning gases, can absorb more heat, has improved the skirt section temperature of spark plug under the low-power operating mode, reduced the formation of greasy dirt carbon deposit, prolonged the useful life of sparking-plug electrode, and wide accommodation, this spark plug adapts to the fuel oil in various models, use on the gas engine.Because the variation of central electrode and side electrode structure and position has made the electrode discharge enlarged areas 3 times, improved anti-ablation of electrode and corrosive power, prolonged the useful life of spark plug.On the lateral electrode internal ring wall, be provided with the ring-like groove of indent, on the central electrode cylinder, be provided with many equidistant grooves corresponding with ring-like groove position, indent, avoided the plane sparking, utilized most advanced and sophisticated easy discharge principle preferably, reduce ignition voltage, improved ignition intensity.

Description of drawings

Fig. 1 is the structural representation of generating ignition plug for I. C. engine;

The structural representation that Fig. 2 overlooks for Fig. 1;

Fig. 3 is the structural representation of automobile with spark plug.

Embodiment

Fig. 1, Figure 2 shows that the generating ignition plug for I. C. engine, comprise be installed in the metal shell 14 and with the central electrode 1 of metal shell 14 insulation, be electrically connected lateral electrode 2 on the

metal shell

14,2 of central electrode 1 and lateral electrodes have the skips gap.Lateral electrode 2 is circular ring type, between lateral electrode 2 and metal shell 14 tops, be provided with bracing frame 3, make lateral electrode 2 leave metal shell 14 tops, bracing frame 3 is made up of three lattice framing sheet metallic objects, and is uniform between lateral electrode 2 outer edges and outer edge, metal shell 14 top.This metal shell 14 is an iron pipe, central electrode 1 lower end is bumped in the insulation magnetic spare 7 that places metal shell 14 inner tops, insulation magnetic spare 7 tops by copper packing 5 at metal shell 14 inner chamber top seals, this copper packing 5 plays the sealing cushioning effect between insulation magnetic spare 7 and metal shell 14, insulation magnetic spare 7 tops are connected with the insulator 4 that stretches out metal shell 14 tops, be that insulator 4 has the skirt section of protruding metal shell 14 tops, described central electrode 1 end passes insulator tip and stretches out lateral electrode 2 ring-like centers.Be provided with down the screw rod of stretching 10 in insulation magnetic spare 7 inner chambers, by glass frit 6 sealings, play the sealing electric action between screw rod 10 tops and central electrode 1 bottom.Screw rod 10 lower ends are inserted in the four fluorine tube 12 of insulation magnetic spare 7 belows, dock with the insulating magnet 15 that places metal shell 14 interior bottoms four fluorine tube 12 lower ends, seal with rubber cushion 13 between four fluorine tube 12 and the

insulating magnet

15,13 sealings of rubber cushion cushioning effect, four fluorine tube 12 is revealed in order to prevent high-tension electricity, in four fluorine tube 12, be provided with the aluminium bar 11 that is connected with screw rod 10 bottom electrical, aluminium bar stretches out insulating magnet 15 outer ends for 11 times, aluminium bar 11 ends are equipped with copper screw cap 16, at insulation magnetic spare 7 hypomeres asbestos packing 8 and tetrafluoro rubber cushion 9 are installed.Be provided with the ring-like groove of indent on lateral electrode 2 internal ring walls, be provided with many equidistant grooves corresponding with ring-like groove position, indent on central electrode 1 cylinder, groove vertically is provided with along central electrode 1 cylinder.

Figure 3 shows that the automobile spark plug, be in insulator 4 tops, central electrode 1 is installed, the bottom is equipped with the Metallic rod 20 of stretching out its end, be connected by conductor glass 19 high temperature between central electrode 1 and the Metallic rod 20, Metallic rod 20 bottoms are equipped with wiring nut 21; Be coated with metal shell 14 at insulator 4 epimeres, be provided with inner washer 17 between metal shell 14 and the insulator 4, also be provided with multi-layer sealed packing ring 18 on the metal shell 14, be electrically connected lateral electrode 2 on the

metal shell

14,2 of central electrode 1 and lateral electrodes have the skips gap.Described lateral electrode 2 is circular ring type, is provided with bracing frame 3 between lateral electrode 2 and metal shell 14 tops, makes lateral electrode 2 leave metal shell 14 tops.Insulator 4 has the skirt section of protruding metal shell 14 tops, and described central electrode 1 end passes insulator tip and stretches out lateral electrode 2 ring-like centers.Bracing frame 3 is made up of three lattice framing sheet metallic objects, and is uniform between lateral electrode 2 outer edges and outer edge, metal shell 14 top.Be provided with the ring-like groove of indent on lateral electrode 2 internal ring walls, be provided with many equidistant grooves corresponding with ring-like groove position, indent on central electrode 1 cylinder, groove vertically is provided with along central electrode 1 cylinder.

Claims

1. improved creeping discharge spark plug electrode structure, comprise and being installed in the metal shell (14) also by the central electrode (1) of insulator (4) with metal shell (14) insulation, metal shell (14) is gone up and is electrically connected lateral electrode (2), it is characterized in that described lateral electrode (2) is circular ring type, between lateral electrode (2) and metal shell (14) top, be provided with bracing frame (3), insulator (4) has the skirt section on protrusion metal shell (14) top, and described central electrode (1) end passes insulator tip and stretches out the ring-like center of lateral electrode (2).

2. improved creeping discharge spark plug electrode structure according to claim 1 is characterized in that described bracing frame (3) is made up of three lattice framing sheet metallic objects, and is uniform between lateral electrode (2) outer edge and metal shell (14) outer edge, top.

3. improved creeping discharge spark plug electrode structure according to claim 1, it is characterized in that described lateral electrode (2) internal ring wall is provided with the ring-like groove of indent, on central electrode (1) cylinder, be provided with many equidistant grooves corresponding with ring-like groove position, indent.