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CN-122014398-A - High-temperature hot surface ignition precombustor structure

CN122014398ACN 122014398 ACN122014398 ACN 122014398ACN-122014398-A

Abstract

The invention discloses a high-temperature hot surface ignition precombustor structure, which relates to the technical field of engines and comprises a base, wherein a combustion chamber is arranged in the base, an air inlet channel communicated with the combustion chamber is arranged at the bottom of the base, a spark plug mounting hole is formed in the side surface of the base, an ignition spark plug arranged in the spark plug mounting hole and communicated with the combustion chamber, a guide mixing member arranged between the combustion chamber and the spark plug mounting hole, an outer spherical shell arranged on the inner wall of the combustion chamber, a precombustor arranged between the inner spherical shell and the inner end of the ignition spark plug, and a guide cover arranged on the inner surface of the inner spherical shell.

Inventors

  • ZHANG ZHIGANG

Assignees

  • 北京智测绿能科技有限公司

Dates

Publication Date
20260512
Application Date
20260312

Claims (10)

  1. 1. A high temperature hot surface ignition prechamber structure, comprising: The engine base (100), the combustion chamber (101) is arranged in the engine base (100), an air inlet channel (103) communicated with the combustion chamber (101) is arranged at the bottom of the engine base (100), and a spark plug mounting hole (106) is arranged on the side surface of the engine base (100); A pilot spark plug (102) mounted in a spark plug mounting hole (106), the spark plug mounting hole (106) communicating with the combustion chamber (101); a pilot mixing member (200) mounted between a combustion chamber (101) and a spark plug mounting hole (106), the pilot mixing member (200) comprising: The outer spherical shell (201) is arranged on the inner wall of the combustion chamber (101), the inner spherical shell (202) is arranged inside the outer spherical shell (201), and a mixing channel (203) for mixed gas to pass through is reserved between the outer spherical shell and the inner spherical shell; A prechamber located between the interior of the inner spherical shell (202) and the inner end of the ignition spark plug (102); And a guide cover (205) mounted on the inner surface of the inner spherical shell (202), wherein the front and rear surfaces of the inner spherical shell (202) and the outer spherical shell (201) are provided with exhaust pipes (204) communicated with the combustion chamber (101), and the exhaust pipes (204) are positioned outside the guide cover (205).
  2. 2. The high-temperature hot surface ignition prechamber structure according to claim 1, characterized in that the small diameter end of the guide cover (205) is provided with a concentration pipe (206), the concentration pipe (206) is internally provided with a concentration hole (2061), and one end of the concentration pipe (206) is close to the ignition end of the ignition spark plug (102).
  3. 3. The high-temperature hot surface ignition prechamber structure according to claim 2, characterized in that the inner wall of the guide cover (205) is provided with a mounting shaft, a supporting rod is arranged between the mounting shaft and the inner wall of the guide cover (205), a mixing blade (208) is rotatably sleeved on the mounting shaft, a control valve (209) is arranged on the exhaust pipe (204), and the control valve (209) regulates and controls the internal passage of the exhaust pipe (204).
  4. 4. A high temperature hot surface ignition prechamber structure according to claim 2, characterized in that the mixing channel (203) in the shape of a Z comprises: the inner spherical surface of the outer spherical shell (201) and the outer spherical surface of the inner spherical shell (202) are provided with mixing grooves (2032), and the mixing grooves (2032) on the surfaces of the inner spherical shell and the outer spherical shell form a flow passage through which gas passes; An outer air inlet hole (2031) is formed in the surface of the outer spherical shell (201), and the outer air inlet hole (2031) is communicated with the mixing groove (2032); An inner air outlet hole (2034) is formed in the surface of the inner spherical shell (202), and the inner air outlet hole (2034) is communicated with the mixing groove (2032).
  5. 5. A high temperature hot surface ignition prechamber structure according to claim 4, characterized in that both mixing grooves (2032) are provided with a plurality of inclined guide plates (2033) on the inner walls.
  6. 6. The high-temperature hot surface ignition prechamber structure according to claim 1, characterized in that a vent hole (105) communicated with a spark plug mounting hole (106) is arranged in the base (100), a valve body is arranged at the top of the base (100), a negative pressure induction armature (104) is arranged in the valve body, and a negative pressure chamber communicated with the vent hole (105) is arranged between the left side of the negative pressure induction armature (104) and the valve body.
  7. 7. A high temperature hot surface ignition prechamber structure according to claim 6, characterized in that a cooling member (300) for cooling the prechamber is arranged on the right side of the valve body, which cooling member (300) comprises: a cooling channel (301) is arranged in the engine base (100), and the cooling channel (301) is distributed at the inner end of the spark plug mounting hole (106) to cool part of the precombustion chamber; the cooling cylinder (305) is arranged on the right side of the valve body, a negative pressure plate (302) is arranged in the cooling cylinder (305), and a cooling cavity is arranged between the negative pressure plate (302) and the valve body; And the recovery pipe (306) and the air inlet pipe (304) are arranged on the front surface and the rear surface of the right end of the cooling cylinder (305), and the recovery pipe (306) and the air inlet pipe (304) are connected with the cooling channel (301).
  8. 8. The high-temperature hot surface ignition prechamber structure according to claim 7, characterized in that the right side of the negative pressure induction armature (104) is provided with a push rod (303) fixed to the left side of the negative pressure plate (302) through a valve body and a cooling cylinder (305), and the air inlet pipe (304) and the recovery pipe (306) are communicated with the cooling chamber.
  9. 9. The high-temperature hot surface ignition prechamber structure according to claim 8, characterized in that the cooling channel (301) comprises an annular cooling hole (3011) surrounding the inner end of the spark plug mounting hole (106), a recovery channel (3013) and an air inlet channel (3012) respectively positioned at the front and the rear of the spark plug mounting hole (106) are arranged in the engine base (100), one ends of the recovery channel (3013) and the air inlet channel (3012) are respectively connected with a recovery pipe (306) and an air inlet pipe (304), and the other ends of the recovery channel (3013) and the air inlet channel (3012) are respectively communicated with the annular cooling hole (3011).
  10. 10. The high-temperature hot surface ignition prechamber structure according to claim 1, characterized in that the bottom of the housing (100) is also provided with an exhaust channel communicating with the combustion chamber (101), and that the intake and exhaust valves are arranged in the intake and exhaust channels (103 ), respectively.

Description

High-temperature hot surface ignition precombustor structure Technical Field The invention belongs to the technical field of engines, and particularly relates to a high-temperature hot surface ignition precombustor structure. Background The engine ignition precombustion chamber structure is a combustion system structure used for improving ignition stability, accelerating combustion speed and improving lean burn and low load working conditions in an internal combustion engine. The staged combustion mode of firstly locally igniting and then igniting the main combustion chamber is realized by independently arranging a small, closed or semi-closed auxiliary combustion chamber outside the main combustion chamber, and the staged combustion mode is one of key technologies of modern high-efficiency and low-emission engines. For example, the pre-combustion structure of an engine with the publication number of CN114439603B comprises a main combustion chamber for the mixed gas to enter and for the exhaust gas to be discharged and a pre-combustion chamber for igniting the mixed gas in the main combustion chamber, wherein a spark plug is arranged in the pre-combustion chamber in a penetrating manner, the pre-combustion chamber is communicated with the main combustion chamber, the pre-combustion structure further comprises a negative pressure module for forming negative pressure, and the inner wall of the pre-combustion chamber is provided with a vent hole communicated with the negative pressure module. In the above patent, the mixed gas of the main combustion chamber is introduced into the precombustion chamber, but the mixed gas entering the precombustion chamber lacks further mixing measures, the mixed gas may have higher or lower local concentration, so that the ignition delay of the precombustion chamber and even failure are caused, thereby influencing the combustion of the main combustion chamber, and the problems that the mixed gas is overheated and ablated in the precombustion chamber when entering the precombustion chamber for ignition, and the service life of the precombustion chamber is reduced are solved. Disclosure of Invention The invention provides a high-temperature hot surface ignition precombustor structure, which aims to solve the problem that the mixed gas possibly has higher or lower local concentration, so that the precombustor is delayed in ignition and even fails. A high temperature hot surface ignition prechamber structure comprising: The engine base is internally provided with a combustion chamber, the bottom of the engine base is provided with an air inlet channel communicated with the combustion chamber, and the side surface of the engine base is provided with a spark plug mounting hole; A pilot spark plug mounted in a spark plug mounting hole, the spark plug mounting hole communicating with the combustion chamber; a pilot mixing member mounted between the combustion chamber and the spark plug mounting hole, the pilot mixing member comprising: The outer spherical shell is arranged on the inner wall of the combustion chamber, the inner spherical shell is arranged in the outer spherical shell, and a mixing channel for mixed gas to pass through is reserved between the outer spherical shell and the inner spherical shell; a precombustor located between the interior of the inner spherical shell and the inner end of the ignition spark plug; And the guide cover is arranged on the inner surface of the inner spherical shell, exhaust pipes communicated with the combustion chamber are arranged on the front and rear surfaces of the inner spherical shell and the outer spherical shell, and the exhaust pipes are positioned on the outer side of the guide cover. Preferably, the small diameter end of the guide cover is provided with a centralized pipeline, a centralized hole is formed in the centralized pipeline, and one end of the centralized pipeline is close to the ignition end of the ignition spark plug. Preferably, the guide cover inner wall is provided with the installation axle, be provided with branch between installation axle and the guide cover inner wall, the epaxial cover that rotates of installation is equipped with mixing vane, be provided with the control valve on the blast pipe, the inside passageway of blast pipe is regulated and control to the control valve. Preferably, the mixing channel of the Z shape comprises: mixing grooves are formed in the inner spherical surface of the outer spherical shell and the outer spherical surface of the inner spherical shell, and the mixing grooves on the surfaces of the inner spherical shell and the outer spherical shell form a flow channel for gas to pass through; an outer air inlet hole is formed in the surface of the outer spherical shell and is communicated with the mixing tank; The surface of the inner spherical shell is provided with an inner air outlet hole which is communicated with the mixing tank. Preferably, a plurality of inclined guide plates are