CN107420225B - Integrated annular manifold wall surface gas fuel injection mixing device with axial air inlet - Google Patents
Integrated annular manifold wall surface gas fuel injection mixing device with axial air inlet Download PDFInfo
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- CN107420225B CN107420225B CN201710504574.6A CN201710504574A CN107420225B CN 107420225 B CN107420225 B CN 107420225B CN 201710504574 A CN201710504574 A CN 201710504574A CN 107420225 B CN107420225 B CN 107420225B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0251—Details of actuators therefor
- F02M21/0254—Electric actuators, e.g. solenoid or piezoelectric
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0257—Details of the valve closing elements, e.g. valve seats, stems or arrangement of flow passages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0278—Port fuel injectors for single or multipoint injection into the air intake system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/04—Gas-air mixing apparatus
- F02M21/042—Mixer comprising a plurality of bores or flow passages
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Abstract
The invention aims to provide an integrated annular manifold wall gas fuel injection mixing device with axial air inlet, which adopts a straight-through air supply mode to ensure sufficient supply of fuel gas entering a valve body; the bottom end of the valve core is provided with a sealing ring belt so as to form an air inlet ring cavity, so that fuel gas is prevented from entering along the axial direction, the gas path balance is ensured, the valve seat quality is lightened, and the response speed is improved; the valve seat structure with the pressure stabilizing cavity is adopted, so that fluctuation of the gas pressure in the gas injection valve can be effectively restrained, and the stability of the gas injection pressure of the gas injection valve is ensured; through the cavity structure of the fuel diffusion pipe, the fuel can be distributed in the whole device, and the continuity and the responsiveness of the air supply device are realized; through the branch pipe chute structure, the ejected gas fuel forms vortex, promotes the mixing degree of fuel and air, is favorable for combustion, and improves the working performance of the device.
Description
Technical Field
The invention relates to a gas fuel injection mixing device, in particular to a gas fuel injection mixing device of a gas fuel engine.
Background
Along with the increasing severe energy and environmental situation and the improvement of emission regulation requirements, energy conservation and emission reduction become the necessary trend of the whole engine industry, and the engine using the gas fuel has received extensive attention due to the good emission property of the engine. An air intake system comprises a plurality of parts from a gas injection valve to an air intake manifold and then to an air valve cylinder, and each part through which fuel and air flow has significance for the performance of a gas fuel engine. For the injection of the gas fuel, the injection flow is required to be large, the injection efficiency is high, and meanwhile, the injection stability and the responsiveness are required to be good; for the flow of the gas fuel and the air, it is necessary to enable the gas fuel and the air to be sufficiently mixed before entering the cylinder, so as to improve the fuel combustion efficiency and save energy consumption.
Disclosure of Invention
The invention aims to provide an integrated annular manifold wall surface gas fuel injection mixing device which can fully mix fuel with air before entering a cylinder and improve combustion efficiency.
The purpose of the invention is realized in the following way:
the invention relates to an integrated annular manifold wall surface gas fuel injection mixing device with axial air intake, which is characterized in that: comprises a fuel gas injection valve, a connecting gas hood and a fuel diffusion pipe;
the gas injection valve comprises a valve body, a valve seat, an electromagnet and a valve core assembly, wherein the valve seat is fixed below the valve body and forms a valve space with the valve body, the electromagnet is positioned in the valve space and is fixed with the upper end of the valve body, a coil is wound in the electromagnet, the valve core assembly is positioned in the valve space and is arranged below the electromagnet, the valve core assembly comprises an armature, a spring seat, a bottom plate, a valve core and a guide pin, the armature, the bottom plate and the valve core are arranged from top to bottom and are simultaneously connected together through fastening bolts, the spring seat is positioned outside the armature and forms an annular groove with the armature, the interior of the electromagnet is provided with the annular groove, two ends of a main reset spring are respectively arranged in the annular groove of the electromagnet and the annular groove of the spring seat, the armature is provided with a guide pin at the center, the guide pin stretches into the electromagnet, two ends of the auxiliary reset spring are respectively contacted with the electromagnet and the guide pin, a pressure balance hole is arranged in the guide pin, the bottom plate is provided with a pressure balance groove, the valve core is of a hollow structure, the valve seat below the valve core is provided with a central pressure stabilizing cavity, the outer end of the valve seat is provided with a pressure stabilizing cavity, the pressure balance hole, the hollow part of the valve core and the central pressure stabilizing cavity are communicated and form an inner space, the upper sealing ring is arranged, the upper air inlet ring is provided with an air outlet ring, the upper ring is arranged below the annular ring, and lower ring is arranged;
the fuel diffusion tube comprises a gas tube main body, the gas tube main body comprises a main tube and branch tubes, the main tube is of a circular ring structure with a cavity, a main tube communication hole is formed in the circular ring structure, a main tube central hole is formed in the middle of the circular ring, the front end of each branch tube is communicated with the circular ring structure of the main tube, the main tube is connected with a connecting gas hood and communicated with the air inlet channel, the central hole of the main tube is communicated with an air inlet channel, a gas mixing area is formed in a branch tube area behind the central hole of the main tube, all branch tubes are distributed around the wall of an air inlet manifold, and inclined slots are formed in the inner sides of the branch tubes;
the air outlet is communicated with the air cover.
The invention may further include:
1. the upper part of one end of the main pipe connected with the gas hood is of a wave-shaped structure, and the communicating hole of the main pipe is of a round platform structure.
2. The tail ends of the branch pipes are provided with semicircular open holes, and the inclined slots on each branch pipe are respectively 30 degrees, 45 degrees and 60 degrees with the axis of the air inlet manifold.
3. An air inlet is formed between the upper part of the electromagnet and the valve body, an air inlet cavity is formed between the middle lower part of the electromagnet and the valve body, a flow guide cavity is formed between the valve core assembly and the valve body, the air inlet cavity and the flow guide cavity are communicated and form an external space, the external space is communicated with the internal space, and an axial air inlet hole is formed in the valve core;
the fuel gas vertically flows into the air inlet cavity through the air inlet, a part of the fuel gas flows into the inner space and the central pressure stabilizing cavity of the valve seat, the rest of the fuel gas continuously and vertically flows, and under the flow guiding effect of the flow guiding cavity, a part of the fuel gas flows through the axial air inlet hole to fill the air inlet annular cavity on the valve core, and the other part of the fuel gas flows into the end pressure stabilizing cavity at the outer end of the valve seat;
when the coil is not electrified in the working process of the gas injection valve, under the pretightening force of the main reset spring and the auxiliary reset spring, the sealing ring belt on the valve core is tightly matched with the upper surface of the valve seat, and the gas fills the external space and the internal space inside the valve body of the gas injection valve; after the coil is electrified, the armature is acted by upward electromagnetic force, the valve core assembly moves upward after overcoming the pretightening force of the main reset spring and the auxiliary reset spring, the valve core is separated from the surface of the valve seat, the gas injection valve is opened, the gas channel is opened, the gas flows in from the axial air inlet hole on the valve core, flows through the air inlet ring cavity, is guided by the air outlet to vertically flow out and enter the connecting gas cover through the gap between the valve core and the valve seat, then enters the fuel diffusion pipe, the gas diffuses in the circular ring structure of the main pipe and flows into each branch pipe, the gas flowing into the branch pipes is sprayed into the gas mixing area through each chute, and meanwhile, the air flows into the gas mixing area from the air inlet channel through the central hole of the main pipe, and the gas and the air are mixed and flow into the air inlet manifold under the action of vortex; after the coil is powered off, under the pretightening force of the main reset spring and the auxiliary reset spring, the armature moves downwards, the valve core assembly moves downwards integrally until the surface of the valve core is attached to the surface of the valve seat, the valve returns to the initial position again, the gas injection valve is closed, and the gas path is closed.
The invention has the advantages that: according to the invention, through the mode that the electromagnet is electrified to attract the armature, the valve core assembly of the electromagnetic valve moves away from the valve seat under the inner guiding action of the guiding pin, so that the gas injection function of the gas valve is realized, and gas enters the fuel diffusion pipe from the outlet of the electromagnetic valve through the connecting gas hood to be injected into the air inlet manifold, so that the gas mixing function is realized; the invention adopts a straight-through air supply mode to ensure sufficient supply of fuel gas entering the valve body; the bottom end of the valve core is provided with a sealing ring belt so as to form an air inlet ring cavity, so that fuel gas is prevented from entering along the axial direction, the gas path balance is ensured, the valve seat quality is lightened, and the response speed is improved; the invention adopts the valve seat structure with the pressure stabilizing cavity, which can effectively inhibit the fluctuation of the gas pressure in the gas injection valve and ensure the stability of the gas injection pressure of the gas injection valve; according to the invention, the pressure balance hole is arranged at the guide pin, the pressure balance groove is arranged at the bottom plate, so that the internal and external air paths of the armature are balanced, no gas pressure difference between the upper and lower parts of the armature is ensured, the armature is prevented from receiving additional axial force, the response speed of the gas injection valve is further improved, and the control difficulty of the gas injection valve is reduced; the invention adopts the connecting gas hood with larger curvature radius, reduces the total pressure loss of the airflow flow caused by a sharp edge structure, and further improves the jet flow of the device; the fuel diffusion pipe is closely attached to the wall of the manifold, so that the wall boundary layer of air flow is destroyed during fuel gas injection, the turbulent energy of the air flow is enhanced, and the mixing between fuel and air is further enhanced.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the overall structure of a fuel gas injection valve;
FIG. 3 is a schematic diagram of a valve cartridge assembly;
FIG. 4 is a front view of a fuel diffusion tube;
fig. 5 is a flow chart of the present invention.
Detailed Description
The invention is described in more detail below, by way of example, with reference to the accompanying drawings:
referring to fig. 1-5, fig. 1 is a schematic diagram of an integral structure of an axial air intake type annular manifold wall gas fuel injection mixing device according to the present invention, which includes a gas injection valve 1, a connecting gas hood 2, and a fuel diffusion pipe 3.
As shown in fig. 2, the gas injection valve of the integrated annular manifold wall gas fuel injection mixing device with axial gas inlet comprises a valve body 4, an electromagnet 5, a coil 6, a main return spring 7, an auxiliary return spring 9, a valve core 10 assembly, a sealing rubber ring 12 and a valve seat 13. The electromagnet 5 is connected with the valve body 4 through threads above the electromagnet, so that the electromagnet is fixed at the central position above the valve body 4, the coil 6 is wound in a ring groove inside the electromagnet 5, the valve core assembly 10 and the valve seat 13 are sequentially arranged below the electromagnet 5 from top to bottom, the valve seat 13 and the valve body 4 are fixedly connected together through bolts, the matching surfaces between the valve seat 13 and the valve body 4 are sealed through the sealing rubber rings 12, the valve seat 13 is provided with pressure stabilizing cavities 8 at the central position and two ends close to the sealing ring belt 19, the pressure stabilizing cavities 8 at the central position of the valve seat 13 are communicated with a gas space inside the valve core assembly 10, and the pressure stabilizing cavities 8 at the two ends of the valve seat 13 are communicated with a flow guiding cavity inside the valve body 4; the pressure stabilizing cavity 8 on the valve seat 13 can effectively inhibit the fluctuation of the gas pressure caused by the gas injection valve in the working process, and ensures the stability of the gas injection pressure of the gas injection valve.
As shown in fig. 3, the valve core assembly 10 of the integrated annular manifold wall gas fuel injection mixing device with axial air intake comprises a guide pin 14, an armature 15, a spring seat 16, a bottom plate 17, a valve core 18, a clamp spring 21, a gasket 22 and a fastening bolt 24, wherein the armature 15 is connected with the bottom plate 17 and the valve core 18 through the fastening bolt 24, a layer of gasket 22 is arranged between the armature 15 and the bottom plate 17, four pressure balance grooves 23 are formed above the bottom plate 17, the spring seat 16 is arranged above the bottom plate 17, the inner side surface of the spring seat 16 is contacted with the side surface of the armature 15, two ends of a main return spring 7 are respectively positioned in annular grooves of the electromagnet 5 and the spring seat 16, a straight groove with a certain depth is formed in the center of the electromagnet 5, the guide pin 14 between the electromagnet 5 and the armature 15 is arranged in the straight groove, an auxiliary return spring 9 is arranged between the upper side of the guide pin 14 and the electromagnet 5, a pressure balance hole 20 is formed in the center of the guide pin 14 and is arranged in the center of the armature 15, the armature 15 is fixed with the armature 15 by utilizing the clamp spring 21, the pressure balance hole 20 in the center of the guide pin 14 is matched with the pressure balance groove 23 on the bottom plate 17, so that the inner space 10 of the valve core assembly is in the inner side of the valve core assembly and the valve core assembly is in a sealing mode, and the valve core 10 is not in the inner side of the valve core assembly is in the axial direction, and the valve core assembly is in the combined air channel is in the inner side of the valve core assembly, and the valve core assembly is in the air channel and the valve assembly is in the air channel and the air channel is in the air channel and is in the air channel 18.
As shown in fig. 4, a fuel diffusion pipe of an integrated annular manifold wall gas fuel injection mixing device for axial intake is composed of a main pipe portion 25, a branch pipe portion 26, and an outlet chute 27. The main pipe portion 25 is closely connected to the connecting hood 2, and the other side is communicated with the branch pipe portion 26, the branch pipe portion 26 is closely attached to the wall Cheng Zhouxiang of the air inlet manifold, and a series of air outlet chute 27 are formed in the wall of the branch pipe portion 26 on the side facing the center of the manifold, and in this embodiment, the axial angles of the air outlet chute and the manifold are 30 °, 45 °, 60 ° respectively.
In the working process of the gas fuel mixing device, when the coil 6 is not electrified, under the pretightening force of the main reset spring 7 and the auxiliary reset spring 9, the valve core assembly 10 is kept motionless at the initial position, the sealing ring belt 19 on the valve core 18 in the valve core assembly 10 is tightly matched with the upper surface of the valve seat 13, at the moment, the ring cavity near the gas outlet ring belt 11 is not communicated with the inner space of the valve body 4, and the gas is filled in the whole space inside the valve body 4 of the gas injection valve. After the coil 6 is electrified, the electromagnet 5 and the armature 15 are magnetized, the armature 15 is subjected to upward electromagnetic force, as the fastening bolt 24 fixes all components including the armature 15 in the valve core assembly 10 together, the valve core assembly 10 is also subjected to upward acting force, after overcoming the pretightening force of the main reset spring 7 and the auxiliary reset spring 9, the valve core 18 which moves upward together with the valve core is separated from the surface of the valve seat 13, at the moment, the gas injection valve is opened, the gas passage is opened, the gas flows in through the axial air inlet hole 28 on the valve core 18, the gas inlet ring cavity 29 with a certain depth is arranged around the multi-channel sealing ring belt 19, and finally, the gas flows out vertically after being guided through the air outlet 30 through the gap between the valve core 18 and the valve seat 13, the multi-channel ring belt is adopted between the valve core 18 and the valve seat 13, the surface is sealed, the pressure is stabilized, the impact can be reduced due to the wider ring area, the reliability is improved, and the surrounding gas is uniformly ventilated in the flowing process due to the pressure stabilizing cavity 8 arranged near the two ends of the gas inlet ring cavity 29 and the center position of the valve seat 13; the gas fuel flows into the fuel diffusion pipe 3 through the communicating gas hood 2, the gas fuel diffuses in the circular ring structure of the main pipe 25 and flows into each branch pipe 26, the gas fuel flowing into each branch pipe 26 is sprayed into the gas mixing area through each chute 27, meanwhile, fresh air enters the gas mixing area from the air inlet channel through the central hole of the main pipe, the air boundary layer formed by the wall of the manifold is destroyed due to the distribution of the branch pipes at the position close to the air inlet manifold, the turbulent energy of the air flow is increased, and in addition, due to the gradual change angle design of the chute 27 on the branch pipe, the gas fuel generates vortex when being sprayed into the mixing area, and under the action of the vortex, the fuel and the air can be fully mixed and then flow into the cylinder. After the fuel gas is sprayed out a certain amount, the coil 5 is powered off, the electromagnetic force born by the armature 15 disappears, the armature 15 moves downwards under the pretightening force of the main reset spring 7 and the auxiliary reset spring 9 between the electromagnet 5 and the spring seat 16 and between the guide pin 14, the valve core assembly 10 moves downwards, the valve core 18 is driven to move downwards at the same time until the surface of the valve core 18 is attached to the surface of the valve seat 13, the valve returns to the initial position again, the fuel gas injection valve is closed, and the gas circuit is closed.
The working process can be known as follows: according to the integrated annular manifold wall gas fuel injection mixing device with axial air inlet, through the mode that the electromagnet 5 is electrified to attract the armature 15, the valve core assembly 10 moves away from the valve seat 13 under the inner guiding action of the guide pin 14, so that the gas injection function of the gas valve is realized; the invention adopts a straight-through air supply mode to ensure sufficient supply of the fuel gas entering the valve body 4; the sealing ring belt 19 is applied to the bottom end of the valve core 18 to form an air inlet ring cavity 29, so that fuel gas enters axially, on one hand, the interference of the fuel gas is avoided, the balance of the air path is ensured, on the other hand, the quality of the valve seat 13 is reduced, and the response speed is improved; the invention adopts the valve seat 18 structure with the pressure stabilizing cavity 8, which can effectively inhibit the fluctuation of the gas pressure in the gas injection valve and ensure the stability of the gas injection pressure of the gas injection valve; according to the invention, the pressure balance hole is arranged at the guide pin 14, the pressure balance groove is arranged at the bottom plate 17, so that no gas pressure difference exists between the upper part and the lower part of the armature 15, the armature 15 in the valve core assembly 10 is prevented from receiving extra axial force, the response speed of the gas injection valve is further improved, and the control difficulty of the gas injection valve is reduced. When the fuel injection is stopped, the flow of fuel in the fuel diffusion pipe 3 is substantially stopped, and the fuel is stored in the gas hood 2, the main pipe 25, and the respective branch pipes 26. When the next intake stroke is reached, the gas injection valve 1 and the cylinder air valve are opened, and the fuel stored in the gas hood 2, the main pipe 25 and the branch pipe 26 is pushed to the gas mixing area by the subsequent fuel and enters the cylinder after being mixed with the air, so that the responsiveness of the whole air intake device for air supply is improved.
The invention relates to an integrated annular manifold wall surface gas fuel injection mixing device for axial air intake, which is divided into a gas injection valve, a connecting gas hood and a fuel diffusion pipe. The gas injection valve comprises a valve body, an electromagnet, a coil, a main reset spring, an auxiliary reset spring, a valve core assembly, a sealing rubber ring and a valve seat, wherein the electromagnet is connected with the valve body through threads above the electromagnet to enable the electromagnet to be fixed at the central position above the valve body; the valve core assembly comprises a guide pin, an armature, a spring seat, a gasket, a bottom plate, a clamp spring, a fastening bolt and a valve core, wherein the armature is connected with the bottom plate and the valve core through the fastening bolt; the fuel gas vertically flows into the valve body through the air inlet, and because of the pressure balance hole on the guide pin and the pressure balance groove on the bottom plate, the inner space of the valve core assembly is communicated with the inner space of the valve body, and a part of fuel gas flows into the inner space of the valve core assembly, so that the inner space of the valve core assembly and the pressure stabilizing cavity in the center of the valve seat are filled immediately; the rest of the fuel gas flows into the valve body along the flow guide cavity, one part of the fuel gas flows into the valve body through the axial air inlet holes, fills the air inlet annular cavity with a certain depth around the multi-channel sealing annular band, and the other part of the fuel gas fills the pressure stabilizing cavities at the two ends of the valve seat and the surrounding space of the valve core. When the coil is not electrified, the surface of the valve core is attached to the surface of the valve seat, and an air inlet annular cavity on the valve core is not communicated with an annular cavity near an air outlet annular belt on the valve seat; when the coil is electrified, the surface of the valve core is separated from the surface of the valve seat, at the moment, the air inlet ring cavity is communicated with the ring cavity near the air outlet ring belt, and the lifting and seating of the valve core control the on-off between the air inlet ring cavity and the ring cavity near the air outlet ring belt. One end of the connecting gas hood is tightly connected with the outlet of the gas injection valve, the other end of the connecting gas hood is tightly connected with the fuel diffusion pipe, and fuel is sprayed out from the gas injection valve and enters the inside of the fuel diffusion pipe through the connecting gas hood. The fuel diffusion pipe comprises a main pipe and branch pipes, the main pipe is of an annular cavity structure connected with the gas hood, and one end of the main pipe is connected with the gas hood through threads; the other side of the main pipe is connected with a plurality of branch pipes, the branch pipes are circumferentially arranged close to the inner wall of the air inlet manifold, a series of inclined grooves with different angles are formed in the inner side wall of each branch pipe, the angles of the inclined grooves are gradually changed, and the gas fuel flows into the air inlet manifold through the inclined grooves to be mixed with air.
Claims (5)
1. An integrated annular manifold wall gas fuel injection mixing device with axial air intake is characterized in that: comprises a fuel gas injection valve, a connecting gas hood and a fuel diffusion pipe;
the gas injection valve comprises a valve body, a valve seat, an electromagnet and a valve core assembly, wherein the valve seat is fixed below the valve body and forms a valve space with the valve body, the electromagnet is positioned in the valve space and is fixed with the upper end of the valve body, a coil is wound in the electromagnet, the valve core assembly is positioned in the valve space and is arranged below the electromagnet, the valve core assembly comprises an armature, a spring seat, a bottom plate, a valve core and a guide pin, the armature, the bottom plate and the valve core are arranged from top to bottom and are simultaneously connected together through fastening bolts, the spring seat is positioned outside the armature and forms an annular groove with the armature, the interior of the electromagnet is provided with the annular groove, two ends of a main reset spring are respectively arranged in the annular groove of the electromagnet and the annular groove of the spring seat, the armature is provided with a guide pin at the center, the guide pin stretches into the electromagnet, two ends of the auxiliary reset spring are respectively contacted with the electromagnet and the guide pin, a pressure balance hole is arranged in the guide pin, the bottom plate is provided with a pressure balance groove, the valve core is of a hollow structure, the valve seat below the valve core is provided with a central pressure stabilizing cavity, the outer end of the valve seat is provided with a pressure stabilizing cavity, the pressure balance hole, the hollow part of the valve core and the central pressure stabilizing cavity are communicated and form an inner space, the upper sealing ring is arranged, the upper air inlet ring is provided with an air outlet ring, the upper ring is arranged below the annular ring, and lower ring is arranged;
the fuel diffusion tube comprises a gas tube main body, the gas tube main body comprises a main tube and branch tubes, the main tube is of a circular ring structure with a cavity, a main tube communication hole is formed in the circular ring structure, a main tube central hole is formed in the middle of the circular ring, the front end of each branch tube is communicated with the circular ring structure of the main tube, the main tube is connected with a connecting gas hood and communicated with the air inlet channel, the central hole of the main tube is communicated with an air inlet channel, a gas mixing area is formed in a branch tube area behind the central hole of the main tube, all branch tubes are distributed around the wall of an air inlet manifold, and inclined slots are formed in the inner sides of the branch tubes;
the air outlet is communicated with the air cover.
2. An axially-admitted integrated annular manifold wall gaseous fuel injection mixing apparatus as claimed in claim 1, wherein: the upper part of one end of the main pipe connected with the gas hood is of a wave-shaped structure, and the communicating hole of the main pipe is of a round platform structure.
3. An axially-admitted integrated annular manifold wall gaseous fuel injection mixing apparatus according to claim 1 or claim 2, wherein: the tail ends of the branch pipes are provided with semicircular open holes, and the inclined slots on each branch pipe are respectively 30 degrees, 45 degrees and 60 degrees with the axis of the air inlet manifold.
4. An axially-admitted integrated annular manifold wall gaseous fuel injection mixing apparatus according to claim 1 or claim 2, wherein: an air inlet is formed between the upper part of the electromagnet and the valve body, an air inlet cavity is formed between the middle lower part of the electromagnet and the valve body, a flow guide cavity is formed between the valve core assembly and the valve body, the air inlet cavity and the flow guide cavity are communicated and form an external space, the external space is communicated with the internal space, and an axial air inlet hole is formed in the valve core;
the fuel gas vertically flows into the air inlet cavity through the air inlet, a part of the fuel gas flows into the inner space and the central pressure stabilizing cavity of the valve seat, the rest of the fuel gas continuously and vertically flows, and under the flow guiding effect of the flow guiding cavity, a part of the fuel gas flows through the axial air inlet hole to fill the air inlet annular cavity on the valve core, and the other part of the fuel gas flows into the end pressure stabilizing cavity at the outer end of the valve seat;
when the coil is not electrified in the working process of the gas injection valve, under the pretightening force of the main reset spring and the auxiliary reset spring, the sealing ring belt on the valve core is tightly matched with the upper surface of the valve seat, and the gas fills the external space and the internal space inside the valve body of the gas injection valve; after the coil is electrified, the armature is acted by upward electromagnetic force, the valve core assembly moves upward after overcoming the pretightening force of the main reset spring and the auxiliary reset spring, the valve core is separated from the surface of the valve seat, the gas injection valve is opened, the gas channel is opened, the gas flows in from the axial air inlet hole on the valve core, flows through the air inlet ring cavity, is guided by the air outlet to vertically flow out and enter the connecting gas cover through the gap between the valve core and the valve seat, then enters the fuel diffusion pipe, the gas diffuses in the circular ring structure of the main pipe and flows into each branch pipe, the gas flowing into the branch pipes is sprayed into the gas mixing area through each chute, and meanwhile, the air flows into the gas mixing area from the air inlet channel through the central hole of the main pipe, and the gas and the air are mixed and flow into the air inlet manifold under the action of vortex; after the coil is powered off, under the pretightening force of the main reset spring and the auxiliary reset spring, the armature moves downwards, the valve core assembly moves downwards integrally until the surface of the valve core is attached to the surface of the valve seat, the valve returns to the initial position again, the gas injection valve is closed, and the gas path is closed.
5. An axially-admitted integrated annular manifold wall gaseous fuel injection mixing apparatus according to claim 3, wherein: an air inlet is formed between the upper part of the electromagnet and the valve body, an air inlet cavity is formed between the middle lower part of the electromagnet and the valve body, a flow guide cavity is formed between the valve core assembly and the valve body, the air inlet cavity and the flow guide cavity are communicated and form an external space, the external space is communicated with the internal space, and an axial air inlet hole is formed in the valve core;
the fuel gas vertically flows into the air inlet cavity through the air inlet, a part of the fuel gas flows into the inner space and the central pressure stabilizing cavity of the valve seat, the rest of the fuel gas continuously and vertically flows, and under the flow guiding effect of the flow guiding cavity, a part of the fuel gas flows through the axial air inlet hole to fill the air inlet annular cavity on the valve core, and the other part of the fuel gas flows into the end pressure stabilizing cavity at the outer end of the valve seat;
when the coil is not electrified in the working process of the gas injection valve, under the pretightening force of the main reset spring and the auxiliary reset spring, the sealing ring belt on the valve core is tightly matched with the upper surface of the valve seat, and the gas fills the external space and the internal space inside the valve body of the gas injection valve; after the coil is electrified, the armature is acted by upward electromagnetic force, the valve core assembly moves upward after overcoming the pretightening force of the main reset spring and the auxiliary reset spring, the valve core is separated from the surface of the valve seat, the gas injection valve is opened, the gas channel is opened, the gas flows in from the axial air inlet hole on the valve core, flows through the air inlet ring cavity, is guided by the air outlet to vertically flow out and enter the connecting gas cover through the gap between the valve core and the valve seat, then enters the fuel diffusion pipe, the gas diffuses in the circular ring structure of the main pipe and flows into each branch pipe, the gas flowing into the branch pipes is sprayed into the gas mixing area through each chute, and meanwhile, the air flows into the gas mixing area from the air inlet channel through the central hole of the main pipe, and the gas and the air are mixed and flow into the air inlet manifold under the action of vortex; after the coil is powered off, under the pretightening force of the main reset spring and the auxiliary reset spring, the armature moves downwards, the valve core assembly moves downwards integrally until the surface of the valve core is attached to the surface of the valve seat, the valve returns to the initial position again, the gas injection valve is closed, and the gas path is closed.
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| CN107420225B true CN107420225B (en) | 2023-05-30 |
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|---|---|---|---|---|
| JP2000110666A (en) * | 1998-09-30 | 2000-04-18 | Toyota Motor Corp | Gaseous fuel injection valve |
| US7383819B1 (en) * | 2006-12-20 | 2008-06-10 | Mitsubishi Heavy Industries, Ltd. | Electromagnetic valve device and fuel injection apparatus with the valve device |
| CA2814458A1 (en) * | 2010-10-19 | 2012-04-26 | Kawasaki Jukogyo Kabushiki Kaisha | Fuel gas supply system of gas engine |
| JP2012225201A (en) * | 2011-04-15 | 2012-11-15 | Denso Corp | Fuel injection device and fuel supply system using the same |
| CN103775248A (en) * | 2014-01-03 | 2014-05-07 | 哈尔滨工程大学 | Fuel gas jetting device of gas fuel engine used for ship or duel-fuel engine |
| CN206816404U (en) * | 2017-06-28 | 2017-12-29 | 哈尔滨工程大学 | A kind of integrated form ring manifold wall gaseous fuel jet mixing device of axial admission |
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2017
- 2017-06-28 CN CN201710504574.6A patent/CN107420225B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000110666A (en) * | 1998-09-30 | 2000-04-18 | Toyota Motor Corp | Gaseous fuel injection valve |
| US7383819B1 (en) * | 2006-12-20 | 2008-06-10 | Mitsubishi Heavy Industries, Ltd. | Electromagnetic valve device and fuel injection apparatus with the valve device |
| CA2814458A1 (en) * | 2010-10-19 | 2012-04-26 | Kawasaki Jukogyo Kabushiki Kaisha | Fuel gas supply system of gas engine |
| JP2012225201A (en) * | 2011-04-15 | 2012-11-15 | Denso Corp | Fuel injection device and fuel supply system using the same |
| CN103775248A (en) * | 2014-01-03 | 2014-05-07 | 哈尔滨工程大学 | Fuel gas jetting device of gas fuel engine used for ship or duel-fuel engine |
| CN206816404U (en) * | 2017-06-28 | 2017-12-29 | 哈尔滨工程大学 | A kind of integrated form ring manifold wall gaseous fuel jet mixing device of axial admission |
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| CN107420225A (en) | 2017-12-01 |
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