CN212304197U

CN212304197U - Spark plug precombustion chamber structure

Info

Publication number: CN212304197U
Application number: CN202021177111.7U
Authority: CN
Inventors: 候全军
Original assignee: Nanjing Huihuang Technology Co ltd
Current assignee: Nanjing Huihuang Technology Co ltd
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2021-01-05
Anticipated expiration: 2030-06-22

Abstract

The utility model discloses a spark plug precombustion chamber structure, including casing, combustion chamber and precombustion chamber, the top of casing is equipped with the insulator, the notch has been seted up to the symmetry on the insulator, notch fit in has (air) intake valve and exhaust valve, the (air) intake valve all is connected with the movable rod with the exhaust valve, the top of insulator is connected with the precombustion chamber, be equipped with the spark plug in the precombustion chamber, central electrode is installed to the bottom of spark plug, the bottom of precombustion chamber is equipped with the head for the arc, the multiunit jet orifice has been seted up on the outer wall of head, the inlet port has been seted up on one side inner wall of head, one side that the head was kept away from to the inlet port is connected with the air intake duct, be equipped with the telescopic link on the bottom. The structure of the spark plug precombustion chamber ensures that the mixed gas is fully combusted, and the service life of the spark plug is prolonged.

Description

Spark plug precombustion chamber structure

Technical Field

The utility model belongs to the technical field of the gasoline engine precombustion chamber, concretely relates to spark plug precombustion chamber structure.

Background

Spark ignition engines use dilute mixture combustion to improve efficiency, such as with a large proportion of exhaust gas recirculation, divided into lean-charge combustion. By adopting the technical means, the combustion speed in the cylinder is slowed down, and the ignition is not reliable. Natural gas engines use lean combustion, and natural gas itself requires a higher flame temperature to ensure adequate combustion.

Conventional spark plugs have the following disadvantages when used: because the grounding electrode and the center electrode are directly arranged in the combustion chamber and ignition is carried out in a relatively open space, the injection pressure of the combustion airflow after ignition is smaller, and the release rate is slower.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a spark plug precombustion chamber structure to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a spark plug precombustion chamber structure comprises a shell, a combustion chamber and a precombustion chamber, wherein an insulator is arranged at the top of the shell, notches are symmetrically arranged on the insulator, an inlet valve and an exhaust valve are matched in the notches, the inlet valve and the exhaust valve are both connected with movable rods, the top of the insulator is connected with a precombustion chamber, a spark plug is arranged in the precombustion chamber, the bottom of the spark plug is provided with a central electrode, the bottom of the precombustion chamber is arc-shaped and provided with a seal head, the outer wall of the seal head is provided with a plurality of groups of jet holes, an air inlet hole is arranged on the inner wall of one side of the end socket, an air inlet groove is connected with one side of the air inlet hole far away from the end socket, the bottom end surface in the air inlet groove is provided with a telescopic rod, the top of the telescopic rod is provided with a sealing plate, the top of the air inlet groove is provided with a notch, and the sealing plate is a circular plate, and the outer diameter of the sealing plate is larger than that of the notch of the air inlet groove.

Preferably, a piston is arranged in the shell, a rotating shaft is arranged at the bottom of the piston, and the rotating shaft is connected with a connecting rod.

Preferably, one side that the insulator moves towards is equipped with the connecting plate, annular array has the supplementary gas pocket of multiunit on the connecting plate, be equipped with the sliding seat on the connecting plate, the one end that the connecting plate was kept away from to the sliding seat is equipped with the sealing washer.

Preferably, the internal connection of precombustion chamber has the circuit line, one side of circuit line orientation head is connected with ignition coil, ignition coil sets up the junction at precombustion chamber and head.

Preferably, the pre-combustion chamber communicates with a combustion chamber provided inside the housing, the combustion chamber being provided at the bottom of the insulator.

Preferably, a bayonet is arranged in the precombustion chamber, and the spark plug is in threaded connection with the precombustion chamber through the bayonet.

The utility model discloses a technological effect and advantage: according to the spark plug precombustion chamber structure, the plurality of groups of injection holes are arranged on the end socket, and the flame in the precombustion chamber is injected into the combustion chamber at the moment of ignition, so that the contact area between the flame and the mixed gas is larger, the mixed gas in the combustion chamber is ensured to be fully combusted, the generation of carbon deposition caused by insufficient combustion of the spark plug is prevented, and the service life of the spark plug is prolonged; through setting up telescopic link and closing plate, separate the inner space of precombustion chamber with the external world, prevent that the gas of burning from getting into the external world when the ignition, ensure the normal operating of internal-combustion engine. The structure of the spark plug precombustion chamber ensures that the mixed gas is fully combusted, and the service life of the spark plug is prolonged.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the prechamber of the present invention;

fig. 3 is a cross-sectional view taken at a in fig. 1 according to the present invention.

In the figure: 1 shell, 101 movable rod, 102 inlet valve, 103 exhaust valve, 12 insulator, 120 movable seat, 121 connecting plate, 122 auxiliary air hole, 123 sealing ring, 13 combustion chamber, 14 piston, 141 rotating shaft, 142 connecting rod, 2 precombustion chamber, 201 ignition coil, 202 circuit line, 203 air inlet hole, 204 injection hole, 205 air inlet groove, 206 telescopic rod, 207 sealing plate, 208 bayonet, 21 spark plug, 211 center electrode and 23 end socket.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a spark plug precombustion chamber structure as shown in figures 1-3, which comprises a shell 1, a combustion chamber 13 and a precombustion chamber 2, wherein the top of the shell 1 is provided with an insulator 12 (the insulator 12 can be selected and used but is not limited to ceramic materials), the insulator 12 is symmetrically provided with notches, the notches are internally matched with an intake valve 102 and an exhaust valve 103, the intake valve 102 and the exhaust valve 103 are arranged to control the gas to enter and exit, the intake valve 102 and the exhaust valve 103 are both connected with a movable rod 101, the movable rod 101 is connected with an external transmission shaft, the top of the insulator 12 is connected with the precombustion chamber 2, a spark plug 21 (the spark plug 21 can be selected and used but is not limited to a resistance type spark plug) is arranged in the precombustion chamber 2, a central electrode 211 is arranged at the bottom of the spark plug 21, a sealing head 23 is arranged at, make flame and gas mixture's area of contact bigger through setting up multiunit perforation 204, guarantee that the gas mixture in the combustion chamber 13 fully burns, inlet port 203 has been seted up on the inner wall of one side of head 23, one side that inlet port 203 kept away from head 23 is connected with air inlet groove 205, provides gas mixture for head 23 through setting up air inlet groove 205, be equipped with telescopic link 206 on the bottom face of air inlet groove 205 inside, the top of telescopic link 206 is equipped with sealing plate 207, the notch has been seted up at air inlet groove 205's top, sealing plate 207 is the notch that disc outside diameter is greater than air inlet groove 205, blocks up air inlet groove 205's notch through setting up sealing plate 207, makes air inlet groove 205 and external isolation in the moment of lighting a fire, prevents that flame from spilling over.

Specifically, a piston 14 is arranged inside the housing 1, a rotating shaft 141 is arranged at the bottom of the piston 14, the rotating shaft 141 is connected with a connecting rod 142, and kinetic energy generated in the combustion process is transmitted to an external output shaft through the arrangement of the piston 14 and the connecting rod 142.

Specifically, a connecting plate 121 is arranged on one side of the insulator 12 facing the insulator, a plurality of groups of auxiliary air holes 122 are arranged in an annular array on the connecting plate 121, a movable seat 120 is arranged on the connecting plate 121, a sealing ring 123 is arranged at one end of the movable seat 120 far away from the connecting plate 121, and the sealing ring 123 is arranged on the connecting plate 121 to prevent the mixed gas from flowing back to the outside from the air inlet groove 205.

Specifically, the internal connection of precombustion chamber 2 has circuit line 202, and circuit line 202 is connected with external portable power source, and portable power source is prior art, circuit line 202 is connected with ignition coil 201 (ignition coil 201 can choose for use but not limited to DQW1107) towards one side of head 23, ignition coil 201 sets up in the junction of precombustion chamber 2 and head 23, ignites the mist through setting up ignition coil 201 and the cooperation of center electrode 211.

Specifically, the precombustion chamber 2 is communicated with a combustion chamber 13 arranged inside the shell 1, the combustion chamber 13 is arranged at the bottom of the insulator 12, and the mixed gas inside the combustion chamber 13 is fully combusted by communicating the precombustion chamber 2 with the combustion chamber 13.

Specifically, a bayonet 208 is arranged in the precombustion chamber 2, the spark plug 21 is in threaded connection with the precombustion chamber 2 through the bayonet 208, and the spark plug 21 is fixed in the precombustion chamber 2 through the bayonet 208, so that the internal space of the end socket 23 is relatively sealed.

The working principle is as follows: according to the spark plug precombustion chamber structure, a large amount of mixed gas enters the shell 1 through the intake valve 102, a small amount of mixed gas enters the end socket 23 through the auxiliary air hole 122 and the air inlet hole 203, the current generated by the ignition coil 201 and the central electrode 211 in the working moment ignites the mixed gas in the end socket 23, the ignited gas enters the combustion chamber 13 through the injection hole 204, so that the heat energy generated by the sufficient combustion of the gas in the shell 1 pushes the piston 14, the kinetic energy is transmitted to an external output shaft through the connecting rod 142, the expansion rod 206 pushes the sealing plate 207 to plug the notch of the air inlet groove 205 in the ignition moment, and the flame overflow is prevented. The spark plug 21 and the ignition coil 201 included in the device are conventional and are electrically connected to an external mobile power source. The spark plug precombustion chamber structure has the advantages of reasonable design, simple structure, high practicability and wide application.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. A spark plug precombustion chamber structure, including casing (1), combustion chamber (13) and precombustion chamber (2), characterized in that: the top of the shell (1) is provided with an insulator (12), notches are symmetrically formed in the insulator (12), an intake valve (102) and an exhaust valve (103) are matched in the notches, the intake valve (102) and the exhaust valve (103) are connected with a movable rod (101), the top of the insulator (12) is connected with a precombustion chamber (2), a spark plug (21) is arranged in the precombustion chamber (2), a central electrode (211) is installed at the bottom of the spark plug (21), the bottom of the precombustion chamber (2) is provided with a seal head (23) in an arc shape, a plurality of groups of jet holes (204) are formed in the outer wall of the seal head (23), an air inlet hole (203) is formed in the inner wall of one side of the seal head (23), one side, far away from the seal head (23), of the air inlet hole (203) is connected with an air inlet groove, the top of the telescopic rod (206) is provided with a sealing plate (207), the top of the air inlet groove (205) is provided with a notch, and the sealing plate (207) is a circular plate and the outer diameter of the sealing plate is larger than that of the notch of the air inlet groove (205).

2. The spark plug prechamber arrangement of claim 1, wherein: the piston (14) is arranged in the shell (1), a rotating shaft (141) is arranged at the bottom of the piston (14), and the rotating shaft (141) is connected with a connecting rod (142).

3. The spark plug prechamber arrangement of claim 1, wherein: one side of insulator (12) orientation is equipped with connecting plate (121), annular array has multiunit auxiliary air hole (122) on connecting plate (121), be equipped with sliding seat (120) on connecting plate (121), the one end that connecting plate (121) were kept away from in sliding seat (120) is equipped with sealing washer (123).

4. The spark plug prechamber arrangement of claim 1, wherein: the internal connection of precombustion chamber (2) has circuit line (202), one side that circuit line (202) orientation head (23) is connected with ignition coil (201), ignition coil (201) set up in the junction of precombustion chamber (2) and head (23).

5. The spark plug prechamber arrangement of claim 1, wherein: the precombustion chamber (2) is communicated with a combustion chamber (13) arranged inside the shell (1), and the combustion chamber (13) is arranged at the bottom of the insulator (12).

6. The spark plug prechamber arrangement of claim 1, wherein: a bayonet (208) is arranged in the precombustion chamber (2), and the spark plug (21) is in threaded connection with the precombustion chamber (2) through the bayonet (208).