CN113431714A - High-efficient blender device of variable cross section gas - Google Patents
High-efficient blender device of variable cross section gas Download PDFInfo
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- CN113431714A CN113431714A CN202110772355.2A CN202110772355A CN113431714A CN 113431714 A CN113431714 A CN 113431714A CN 202110772355 A CN202110772355 A CN 202110772355A CN 113431714 A CN113431714 A CN 113431714A
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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
- F02M21/045—Vortex mixer
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/02—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
- F02D19/021—Control of components of the fuel supply system
- F02D19/023—Control of components of the fuel supply system to adjust the fuel mass or volume flow
- F02D19/024—Control of components of the fuel supply system to adjust the fuel mass or volume flow by controlling fuel injectors
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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
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0206—Non-hydrocarbon fuels, e.g. hydrogen, ammonia or carbon monoxide
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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
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
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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
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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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
Abstract
The invention relates to a variable cross-section gas high-efficiency mixer device, which comprises a gas mixer shell (1), a gas mixer shell (2), blades (3), a nozzle mounting seat (4), a tapered circular channel (5), an equal cross-section circular channel (6), a tapered circular channel (7), a gas mixer support frame (14), a gas mixer tapered circular channel (17), a gas mixer equal cross-section circular channel (18) and a gas mixer tapered circular channel (19); the device can meet the application scenes of premixed combustion of gas engines such as rotor engines, natural gas engines, hydrogen engines and the like, gas turbines and the like; and the mixing rate of the mixed gas can be controlled according to specific working conditions, and the gas mixing rate and the efficiency requirement under the target working conditions are matched.
Description
Technical Field
The invention relates to a combustor control technology, in particular to a high-efficiency mixer device for variable-section fuel gas.
Background
It is known that the organization of combustible mixture and the homogeneity of mixture have great influence on the combustion process, especially in the case of lean combustion, the mixture is not mixed uniformly, which not only affects the combustion stability, but also results in low combustion efficiency and high generation of pollutant emissions. Moreover, on engines running at high speed, such as gas engines like rotor engines, natural gas engines and hydrogen engines, the time scale of gas combustion is short, and the gas combustion process is often completed within milliseconds, which puts severe requirements on the organization of combustible mixture and the uniformity of the mixture. Therefore, it is necessary to prepare a combustible mixture in advance, increase the speed of the gas mixture, and increase the degree of uniformity of the gas mixture, i.e., to form a premixed mixture, so as to realize premixed combustion. However, at present, most gas engines such as a rotary engine, a natural gas engine and a hydrogen engine use air passage injection, and fuel gas is directly injected into an air passage at low pressure so as to be mixed with fresh air. However, the mixing efficiency of the gas injected from the gas passage and the fresh air in the gas passage is low, the mixing efficiency of the gas is low, the quality of the gas and the air is low after the gas and the air are sucked into the engine cylinder, the combustible mixture is distributed unevenly, flame propagation is easy to quench, particularly the uneven distribution of the mixture close to the wall surface of the combustion chamber causes insufficient combustion, low combustion efficiency and more generation of pollutant emissions, such as emission of hydrocarbon and carbon monoxide, in the engine cylinder. .
Disclosure of Invention
The invention aims to solve the problems, and the invention provides a mixer device capable of flexibly adjusting fuel supply, so that the combustion requirements of various working conditions such as the mixing speed of gas and air and the mixing uniformity can be controlled according to the specific rotating speed working condition requirements, the high-efficiency mixing requirements of single gas and air, the high-efficiency mixing requirements of various gases and air and the high-efficiency mixing requirements of various gases, thereby ensuring full combustion, high combustion efficiency and reduction of generation of pollutant emissions.
The invention has the technical scheme that the variable cross-section gas mixer device comprises a gas mixer shell, blades, a nozzle mounting seat, a tapered circular channel, an equal cross-section circular channel, a tapered circular channel, a gas mixer support frame, a gas mixer tapered circular channel, a gas mixer equal cross-section circular channel and a gas mixer tapered circular channel;
the blades are installed on the gas mixer support frame through the gas mixer shell.
The nozzle mounting seat is mounted on the gas mixer shell through welding, and the tapered circular channel (5), the uniform-section circular channel and the divergent circular channel on the nozzle mounting seat are matched with the gas mixer tapered circular channel, the gas mixer uniform-section circular channel and the gas mixer divergent circular channel of the gas mixer shell one by one;
the gas flow can accelerate through the tapered circular channel, so that the speed of the gas flow is increased, and the rotating speed of the blades is greatly increased;
the gas flow can keep the flow velocity when passing through the circular channel with the equal section, and the rotating speed of the blade is maintained;
the gas flow can lead to the air current to slow down through the flaring circular passageway, reduces the speed of gas flow to can greatly reduce the rotational speed of blade.
Further, still include convergent circle passageway solenoid valve, convergent circle passageway solenoid valve is installed in the convergent circle passageway in the nozzle mount pad, is close to gas passageway gradual change end, convergent circle passageway solenoid valve's switching, the break-make of control convergent circle passageway to the speed in the control gas passes through gas mixer convergent circle passageway and gets into variable cross section gas mixer, and then the rotational speed of control blade, realize gas and fresh air mixing rate at last, realize gas and fresh air mixing rate requirement under the target operating mode.
The constant-section circular channel electromagnetic valve is arranged in the constant-section circular channel in the nozzle mounting seat, is close to the constant-section end of the gas channel and is staggered with the tapered circular channel electromagnetic valve, and the on-off of the constant-section circular channel electromagnetic valve can be controlled, so that the speed of the gas entering the variable-section gas mixer through the constant-section circular channel of the gas mixer is controlled; and then the rotating speed of the blades is controlled, and finally the mixing rate of the fuel gas and the fresh air is realized, and the mixing rate requirement of the fuel gas and the fresh air under the target working condition is realized.
The gradually-expanding circular channel electromagnetic valve is installed in the gradually-expanding circular channel in the nozzle installation seat, is far away from the gradually-expanding end of the fuel gas channel and is staggered with the gradually-expanding circular channel electromagnetic valve and the uniform-section circular channel electromagnetic valve, the opening and closing of the gradually-expanding circular channel electromagnetic valve controls the on-off of the gradually-expanding circular channel, and therefore the speed of fuel gas entering the variable-section fuel gas mixer through the gradually-expanding circular channel of the fuel gas mixer is controlled; and then the rotating speed of the blades is controlled, and finally the mixing rate of the fuel gas and the fresh air is realized, and the mixing rate requirement of the fuel gas and the fresh air under the target working condition is realized.
Further, the device also comprises a first nozzle, a second nozzle, a third nozzle and a fourth nozzle;
the first nozzle, the second nozzle, the third nozzle and the fourth nozzle are used for spraying single gas, namely the four nozzles simultaneously spray the single gas;
or the first nozzle, the second nozzle, the third nozzle and the fourth nozzle are used for spraying two gases, namely the first nozzle and the third nozzle spray one gas, and the second nozzle and the fourth nozzle spray the other gas, so that two gas interval spraying is formed.
Furthermore, the device also comprises an electric control unit, wherein the electric control unit collects the rotating speed in real time, the electromagnetic valve of the constant cross section circular channel, the electromagnetic valve of the gradually expanding circular channel, signals of the first nozzle, the second nozzle, the third nozzle and the fourth nozzle, and controls the spraying pulse width of the first nozzle, the second nozzle, the third nozzle and the fourth nozzle according to the rotating speed, and simultaneously controls the electromagnetic valve of the gradually expanding circular channel, the electromagnetic valve of the constant cross section circular channel and the electromagnetic valve of the gradually expanding circular channel to be opened and closed, so that the on-off of the constant cross section circular channel and the gradually expanding circular channel is controlled.
The invention has the beneficial effects that:
(1) the gas air current can smoothly get into variable cross section gas blender, reduces the flow resistance that the gas got into variable cross section gas blender to promote blade 3 and move with different rotational speed, promote the mixing rate of gas and fresh air, improve the mixing homogeneity.
(2) The combustor can inject three or even four gases, and meets the requirements under different scenes.
(3) The mixer controls the mixing speed and the mixing uniformity of the gas and the air according to the specific rotating speed working condition requirement, the single gas and air efficient mixing requirement, the multiple gas and air efficient mixing requirement and the multiple gas efficient mixing requirement, so that the gas mixing speed is increased, the gas mixing efficiency is improved, the full combustion of the gas is promoted, the gas combustion efficiency is improved, and the generation of pollutant emissions is reduced; and the mixing rate of the mixed gas can be controlled according to specific working conditions, and the gas mixing rate and the efficiency requirement under the target working conditions are matched.
Drawings
FIG. 1 is a schematic view of a variable cross-section gas high efficiency mixer apparatus and control method;
FIG. 2 is a schematic cross-sectional view of a variable cross-section gas high efficiency mixer nozzle mount;
FIG. 3 is a schematic side view of a variable cross-section gas high efficiency mixer;
FIG. 4 is a schematic cross-sectional view of a mixing body;
FIG. 5 is a schematic side cross-sectional view of a nozzle mount;
FIG. 6 is a schematic cross-sectional front view of a nozzle mount;
FIG. 7 is a schematic view of a blade;
FIG. 8 is a schematic cross-sectional view of a blade.
1-a gas mixer shell, 2-a blade hollow cylinder, 3-a blade, 4-a nozzle mounting seat, 5-a tapered circular channel, 6-a uniform section circular channel, 7-a tapered circular channel, 8-a tapered circular channel electromagnetic valve, 9-a uniform section circular channel electromagnetic valve, 10-a tapered circular channel electromagnetic valve, 13-a gas mixer central shaft, 14-a gas mixer support frame, 15-a second nozzle, 16-a second nozzle air inlet, 17-a gas mixer tapered circular channel, 18-a gas mixer uniform section circular channel, 19-a gas mixer tapered circular channel, 20-a third nozzle, 21-a third nozzle air inlet, 23-a fourth nozzle and 24-a fourth nozzle air inlet.
Detailed description of the preferred embodiment
The technical solution of the present invention will be described in detail with reference to the accompanying drawings 1-8.
As shown in fig. 1 to 8, this embodiment provides a variable cross-section gas mixer device, which includes a gas mixer housing 1, a gas mixer housing 2, a vane 3, a nozzle mount 4, a tapered circular passage 5, an equal cross-section circular passage 6, a tapered circular passage 7, a tapered circular passage solenoid valve 8, an equal cross-section circular passage solenoid valve 9, a tapered circular passage solenoid valve 10, a first nozzle 11, a first nozzle inlet port 12, a gas mixer center shaft 13, a gas mixer support frame 14, a second nozzle 15, a second nozzle inlet port 16, a gas mixer tapered circular passage 17, a gas mixer equal cross-section circular passage 18, a gas mixer tapered circular passage 19, a third nozzle 20, a third nozzle inlet port 21, an electronic control unit 22, a fourth nozzle 23, and a fourth nozzle inlet port 24.
The blades 3 are mounted on a gas mixer support frame 14 by means of the gas mixer housing 2.
In addition, the electromagnetic valve 8 of the tapered circular channel is arranged in the tapered circular channel 5 in the nozzle mounting seat 4 and is close to the gradual change end of the gas channel, and the opening and closing of the electromagnetic valve 8 of the tapered circular channel can control the on-off of the tapered circular channel 5, so that the speed of the gas entering the variable-section gas mixer through the tapered circular channel 17 of the gas mixer is controlled, the rotating speed of the blades 3 is further controlled, the mixing rate of the gas and the fresh air is finally realized, and the mixing rate requirement of the gas and the fresh air under the target working condition is realized; and this passageway is convergent circle passageway 5, and the gas air current can lead to the air current to accelerate through the convergent passageway, improves the speed of gas air current to can improve blade 3's rotation rate greatly, thereby can satisfy under the high rotational speed condition gas and fresh air mix the less demand of time scale relatively.
The uniform-section circular channel electromagnetic valve 9 is arranged in the uniform-section circular channel 6 in the nozzle mounting seat 4, is close to the uniform-section end of the gas channel and is staggered with the gradually-reduced circular channel electromagnetic valve 8, and the opening and closing of the uniform-section circular channel electromagnetic valve 9 can control the on-off of the uniform-section circular channel 6, so that the speed of gas entering the variable-section gas mixer through the uniform-section circular channel 18 of the gas mixer is controlled; further controlling the rotating speed of the blades 3, and finally realizing the mixing rate of the gas and the fresh air to meet the mixing rate requirement of the gas and the fresh air under the target working condition; the channel is a circular channel 6 with the equal section, the flow speed of gas flow can be kept when the gas flow passes through the channel with the equal section, and the rotating speed of the blades 3 is maintained, so that the requirement that the mixing time scale of gas and fresh air is moderate under the condition of medium rotating speed can be met.
The gradually-expanding circular channel electromagnetic valve 10 is arranged in a gradually-expanding circular channel 7 in the nozzle mounting seat 4, is far away from the gradually-expanding end of the fuel gas channel, is staggered with the gradually-expanding circular channel electromagnetic valve 8 and the uniform-section circular channel electromagnetic valve 9, and can control the on-off of the gradually-expanding circular channel 7 by opening and closing the gradually-expanding circular channel electromagnetic valve 10, so that the speed of the fuel gas entering the variable-section fuel gas mixer through the gradually-expanding circular channel 19 of the fuel gas mixer is controlled; further controlling the rotating speed of the blades 3, and finally realizing the mixing rate of the gas and the fresh air to meet the mixing rate requirement of the gas and the fresh air under the target working condition; and this passageway is divergent circle passageway 7, and the gas air current can lead to the air current to slow down through the convergent passageway, reduces the speed of gas air current to can significantly reduce blade 3's rotational speed, thereby can satisfy under the low rotational speed condition gas and fresh air mixing time scale longer demand relatively.
The first nozzle 11 is arranged in the nozzle mounting seat 4, and the first nozzle air inlet 12 is used for externally connecting fuel gas;
the second nozzle 15 is arranged in the nozzle mounting seat 4, and the second nozzle air inlet 16 is used for externally connecting fuel gas;
the third nozzle 20 is arranged in the nozzle mounting seat 4, and the third nozzle air inlet 21 is used for externally connecting fuel gas;
the fourth nozzle 23 is mounted in the nozzle mount 4 and the fourth nozzle inlet 24 is adapted to receive fuel gas externally.
The first nozzle 11, the second nozzle 15, the third nozzle 20 and the fourth nozzle 23 can be used to inject a single gas (such as natural gas, hydrogen, oxygen and other gases), i.e. four nozzles simultaneously inject a single gas; two gases (such as natural gas and hydrogen) can be sprayed, namely the first nozzle 11 and the third nozzle 20 spray one gas, and the second nozzle 15 and the fourth nozzle 23 spray the other gas, so that two gas interval spraying is formed, and the gas mixing speed and the gas mixing uniformity are improved; three or even four gases can be sprayed, and the requirements under different scenes are met.
The electronic control unit 22 collects signals of the rotating speed and the reducing circular channel electromagnetic valve 8, the uniform section circular channel electromagnetic valve 9, the gradually expanding circular channel electromagnetic valve 10, the first nozzle 11, the second nozzle 15, the third nozzle 20 and the fourth nozzle 23 in real time, and controls the spraying pulse width of the first nozzle 11, the second nozzle 15, the third nozzle 20 and the fourth nozzle 23, namely the gas spraying amount according to the rotating speed; meanwhile, the opening and closing of the electromagnetic valve 8 of the gradually-reduced circular channel, the electromagnetic valve 9 of the uniform-section circular channel and the electromagnetic valve 10 of the gradually-expanded circular channel are controlled, so that the on-off of the gradually-reduced circular channel 5, the on-off of the uniform-section circular channel 6 and the on-off of the gradually-expanded circular channel 7 are controlled, and the speed of the fuel gas entering the variable-section fuel gas mixer is controlled; and controlling the rotating speed of the blades 3, and finally realizing the mixing rate of the gas and the fresh air to meet the mixing rate requirement of the gas and the fresh air under the target working condition.
The invention provides a control method of a variable-section gas mixer device, which is realized by the following specific method:
under the high-rotation-speed working condition: the fuel gas and the air are required to be rapidly mixed, and the mixed gas is formed uniformly; at this time, the electronic control unit 22 collects signals of the rotating speed and the reducing circular channel electromagnetic valve 8, the uniform section circular channel electromagnetic valve 9, the gradually expanding circular channel electromagnetic valve 10, the first nozzle 11, the second nozzle 15, the third nozzle 20 and the fourth nozzle 23 in real time, and controls the spraying pulse widths of the first nozzle 11, the second nozzle 15, the third nozzle 20 and the fourth nozzle 23, namely the gas spraying amount according to the requirement of fast mixing of gas and air under the working condition of high rotating speed; meanwhile, the electromagnetic valve 8 of the gradually-reduced circular channel is controlled to be opened, and the electromagnetic valve 9 of the uniform-section circular channel and the electromagnetic valve 10 of the gradually-enlarged circular channel are controlled to be closed, so that the gradually-reduced circular channel 5 is opened, and the uniform-section circular channel 6 and the gradually-enlarged circular channel 7 are closed; then the fuel gas enters the variable cross-section fuel gas mixer through the tapered circular channel 5 and the tapered circular channel 17 of the fuel gas mixer; and this passageway is convergent circle passageway 5, and the gas air current can lead to the air current to accelerate through the convergent passageway, improves the speed of gas air current to can improve blade 3's rotation rate greatly, thereby can satisfy under the high rotational speed condition gas and fresh air mix the less demand of time scale relatively.
Under the medium rotating speed working condition: the gas and the air are required to be mixed at a moderate speed, and the mixed gas is formed uniformly; at this time, the electronic control unit 22 collects signals of the rotating speed and the reducing circular channel electromagnetic valve 8, the uniform section circular channel electromagnetic valve 9, the gradually expanding circular channel electromagnetic valve 10, the first nozzle 11, the second nozzle 15, the third nozzle 20 and the fourth nozzle 23 in real time, and controls the spraying pulse widths of the first nozzle 11, the second nozzle 15, the third nozzle 20 and the fourth nozzle 23, namely the gas spraying amount according to the requirement of fast mixing of gas and air under the working condition of high rotating speed; meanwhile, the constant cross section circular channel electromagnetic valve 9 is controlled to be opened, and the gradually reducing circular channel electromagnetic valve 8 and the gradually expanding circular channel electromagnetic valve 10 are controlled to be closed, so that the constant cross section circular channel 6 is opened, and the gradually reducing circular channel 5 and the gradually expanding circular channel 7 are closed to be switched on and off; then the fuel gas enters the variable cross-section fuel gas mixer through the uniform cross-section circular channel 6 and the uniform cross-section circular channel 18 of the fuel gas mixer; the channel is a circular channel 6 with the equal section, the flow speed of gas flow can be kept when the gas flow passes through the channel with the equal section, and the rotating speed of the blades 3 is maintained, so that the requirement that the mixing time scale of gas and fresh air is moderate under the condition of medium rotating speed can be met.
Under the low-rotation-speed working condition: the time scale for mixing the fuel gas and the air is relatively long, and the mixed gas is easy to form and uniform; at this time, the electronic control unit 22 collects signals of the rotating speed and the reducing circular channel electromagnetic valve 8, the uniform section circular channel electromagnetic valve 9, the gradually expanding circular channel electromagnetic valve 10, the first nozzle 11, the second nozzle 15, the third nozzle 20 and the fourth nozzle 23 in real time, and controls the spraying pulse widths of the first nozzle 11, the second nozzle 15, the third nozzle 20 and the fourth nozzle 23, namely the gas spraying amount according to the requirement of fast mixing of gas and air under the working condition of high rotating speed; meanwhile, the electromagnetic valve 10 of the gradually-expanding circular channel is controlled to be opened, and the electromagnetic valve 8 of the gradually-expanding circular channel and the electromagnetic valve 9 of the uniform-section circular channel are closed, so that the gradually-expanding circular channel 7 is opened and closed, and the gradually-expanding circular channel 5 and the uniform-section circular channel 6 are closed; then the fuel gas enters the variable cross-section fuel gas mixer through the gradually expanding circular channel 7 and the gradually expanding circular channel 19 of the fuel gas mixer; and this passageway is divergent circle passageway 7, and the gas air current can lead to the air current to slow down through the convergent passageway, reduces the speed of gas air current to can significantly reduce blade 3's rotational speed, thereby can satisfy under the low rotational speed condition gas and fresh air mixing time scale longer demand relatively.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A variable cross-section gas mixer device, characterized in that: the device comprises a gas mixer shell (1), a gas mixer shell (2), blades (3), a nozzle mounting seat (4), a gradually-reduced circular channel (5), a uniform-section circular channel (6), a gradually-expanded circular channel (7), a gas mixer supporting frame (14), a gas mixer gradually-reduced circular channel (17), a gas mixer uniform-section circular channel (18) and a gas mixer gradually-expanded circular channel (19);
the blades (3) are arranged on a gas mixer support frame (14) through a gas mixer shell (2). The nozzle mounting seat (4) is mounted on the gas mixer shell (1) through welding, and a tapered circular channel (5), a uniform section circular channel (6) and a gradually expanded circular channel (7) on the nozzle mounting seat (4) are matched with a gas mixer tapered circular channel (17), a gas mixer uniform section circular channel (18) and a gas mixer gradually expanded circular channel (19) of the gas mixer shell (1) one by one;
the gas flow can accelerate through the tapered circular channel (5), so that the speed of the gas flow is increased, and the rotating speed of the blade (3) is greatly increased;
the gas flow keeps the flow velocity when passing through the circular channel (6) with the equal section, and the rotating speed of the blade (3) is maintained;
the gas flow passing through the divergent circular channel (7) can cause the gas flow to be decelerated, the speed of the gas flow is reduced, and therefore the rotating speed of the blades (3) can be greatly reduced.
2. The variable cross-section gas mixer device of claim 1, wherein: still include convergent circle passageway solenoid valve (8), install in convergent circle passageway (5) in nozzle mount pad (4) convergent circle passageway solenoid valve (8), be close to gas passageway gradual change end, the switching of convergent circle passageway solenoid valve (8), the break-make of control convergent circle passageway (5), thereby the speed in the control gas passes through gas mixer convergent circle passageway (17) entering variable cross section gas mixer, and then the rotational speed of control blade (3), realize gas and fresh air mixing rate at last, realize gas and fresh air mixing rate requirement under the target operating mode.
3. The variable cross-section gas mixer device of claim 1, wherein:
the constant-section circular channel electromagnetic valve (9) is arranged in a constant-section circular channel (6) in the nozzle mounting seat (4), is close to the constant-section end of the gas channel and is staggered with the tapered circular channel electromagnetic valve (8), and the opening and closing of the constant-section circular channel electromagnetic valve (9) can control the on-off of the constant-section circular channel (6), so that the speed of gas entering the variable-section gas mixer through the constant-section circular channel (18) of the gas mixer is controlled; and further controlling the rotating speed of the blades (3), and finally realizing the mixing rate of the gas and the fresh air and realizing the mixing rate requirement of the gas and the fresh air under the target working condition.
4. The variable cross-section gas mixer device of claim 1, wherein: the fuel gas mixing device is characterized by further comprising a gradually expanding circular channel electromagnetic valve (10), wherein the gradually expanding circular channel electromagnetic valve (10) is installed in a gradually expanding circular channel (7) in the nozzle installation seat (4), is far away from the gradually expanding end of the fuel gas channel, is staggered with the gradually expanding circular channel electromagnetic valve (8) and the uniform cross section circular channel electromagnetic valve (9), and controls the on-off of the gradually expanding circular channel (7) by opening and closing the gradually expanding circular channel electromagnetic valve (10), so that the speed of fuel gas entering the variable cross section fuel gas mixer through the gradually expanding circular channel (19) of the fuel gas mixer is controlled; and further controlling the rotating speed of the blades (3), and finally realizing the mixing rate of the gas and the fresh air and realizing the mixing rate requirement of the gas and the fresh air under the target working condition.
5. The variable cross-section gas mixer device of claim 1, wherein: the device also comprises a first nozzle (11), a second nozzle (15), a third nozzle (20) and a fourth nozzle (23);
wherein the first nozzle (11), the second nozzle (1) (5), the third nozzle (20) and the fourth nozzle (23) are used for spraying single gas, namely the four nozzles spray the single gas simultaneously;
or the first nozzle (11), the second nozzle (15), the third nozzle (20) and the fourth nozzle (23) are used for spraying two gases, namely the first nozzle (11) and the third nozzle (20) spray one gas, and the second nozzle (15) and the fourth nozzle (23) spray the other gas, so that two gas interval spraying is formed.
6. The variable area gas mixer device of claim 5, wherein: still include electronic control unit (22), the rotational speed is gathered in real time to electronic control unit (22), convergent circle passageway solenoid valve (8), uniform cross section circle passageway solenoid valve (9), divergent circle passageway solenoid valve (10), first nozzle (11), second nozzle (15), the signal of third nozzle (20) and fourth nozzle (23), according to the size of rotational speed, control first nozzle (11), second nozzle (15), third nozzle (20) and fourth nozzle (23) spray the pulse width, control convergent circle passageway solenoid valve (8) simultaneously, uniform cross section circle passageway solenoid valve (9) and divergent circle passageway solenoid valve (10) switching, thereby control convergent circle passageway (5), the break-make of uniform cross section circle passageway (6) and divergent circle passageway (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110772355.2A CN113431714B (en) | 2021-07-08 | 2021-07-08 | High-efficient blender device of variable cross section gas |
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| CN202110772355.2A CN113431714B (en) | 2021-07-08 | 2021-07-08 | High-efficient blender device of variable cross section gas |
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| CN113431714A true CN113431714A (en) | 2021-09-24 |
| CN113431714B CN113431714B (en) | 2022-03-01 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000248999A (en) * | 1999-02-26 | 2000-09-12 | Aisan Ind Co Ltd | Regulator for compressed natural gas |
| JP2004293402A (en) * | 2003-03-26 | 2004-10-21 | Yanmar Co Ltd | Mixer for gas engine |
| CN105089858A (en) * | 2015-09-11 | 2015-11-25 | 南充天瑞汽车电子有限公司 | Single-point spraying gas mixer and spraying rail assembly |
| US20190093604A1 (en) * | 2017-09-25 | 2019-03-28 | Woodward, Inc. | Passive pumping for recirculating exhaust gas |
| CN110552823A (en) * | 2019-09-18 | 2019-12-10 | 广西玉柴机器股份有限公司 | Air inlet connecting pipe assembly and natural gas engine thereof |
-
2021
- 2021-07-08 CN CN202110772355.2A patent/CN113431714B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000248999A (en) * | 1999-02-26 | 2000-09-12 | Aisan Ind Co Ltd | Regulator for compressed natural gas |
| JP2004293402A (en) * | 2003-03-26 | 2004-10-21 | Yanmar Co Ltd | Mixer for gas engine |
| CN105089858A (en) * | 2015-09-11 | 2015-11-25 | 南充天瑞汽车电子有限公司 | Single-point spraying gas mixer and spraying rail assembly |
| US20190093604A1 (en) * | 2017-09-25 | 2019-03-28 | Woodward, Inc. | Passive pumping for recirculating exhaust gas |
| CN110552823A (en) * | 2019-09-18 | 2019-12-10 | 广西玉柴机器股份有限公司 | Air inlet connecting pipe assembly and natural gas engine thereof |
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|---|---|
| CN113431714B (en) | 2022-03-01 |
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