CN105402049B - A kind of engine air-gas premixing blender - Google Patents
A kind of engine air-gas premixing blender Download PDFInfo
- Publication number
- CN105402049B CN105402049B CN201510948115.8A CN201510948115A CN105402049B CN 105402049 B CN105402049 B CN 105402049B CN 201510948115 A CN201510948115 A CN 201510948115A CN 105402049 B CN105402049 B CN 105402049B
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- valve
- air
- lower house
- chamber
- mixing
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Classifications
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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
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Multiple-Way Valves (AREA)
Abstract
The present invention relates to a kind of engine air-gas premixing blender, including upper shell, lower house, and air intlet is provided with the side of upper shell, and mixed gas outlet is provided with provided with fuel gas inlet, lower end in the side of lower house, it is characterized in that：At least provided with a mixing valve in the die cavity that upper shell and lower house connect and compose, the mixing valve is connected to the upper end of the lower house, and by the die cavity at intervals of air chamber, fuel chamber and mixing chamber；Rotary shaft is provided with lower house, both ends and the lower house of the rotary shaft are connected, are provided with rocking arm in one end of rotary shaft, the inwall corresponding matching of air throttle, the air throttle and mixing chamber is provided with the middle part of rotary shaft.The present invention disclosure satisfy that gaseous mixture demand of the engine under different operating modes, adapt to startup, idling and the accelerating mode of engine；It can prevent from mixing gas leakage, improve security.
Description
Technical field
The present invention relates to diesel engine part, and in particular to a kind of engine air-gas premixing blender.Its is main
It is to be researched and developed for the power set using natural gas, liquefied petroleum gas, rubbish gas or biogas as fuel.
Technical background
Increasingly strict and oil price with Abgasgesetz is constantly risen, and domestic main diesel engine manufacturers are proposed one after another
Gaseous propellant engine or dual fuel engine.The plenum system of gas engine mainly has inlet manifold's premixing, air inlet discrimination
Pipe multi-point injection and inner cylinder direct injection etc..Wherein, because the supply gas pressure of inlet manifold's pre-mixed CNG supply mode is relatively low, structure
Simply, cost is cheap, so more being favored by domestic market." the gas of natural gas engine as disclosed in CN 202531303U
Blender ", mixed applied to natural gas engine fuel gas with air.There is columnar exhaust the housing lower end of monoblock cast
Room, a butterfly valve is fixed with by axle in exhaust chamber；Housing has mixing chamber, and one end of mixing chamber is fixed with natural air valve seat,
There are the natural gas valve core of cone shape, the inner connection valve rod of natural air valve seat, threaded stem connection in conical centre bore
In the screw of the mixing chamber other end；There is knob in the end of valve rod；There are dividing plate, the middle part of dividing plate between air chamber and mixing chamber
There is conicylindrical passage mouth；Air valve body assembly is fixed with dividing plate between air chamber and mixing chamber.Effect is：Natural air valve
Gap between seat and natural gas valve core is adjusted by turn knob；Pass through entering for the controller perturbation air of spring and arc diaphragm
Tolerance.It can make engine can stable operation under idling and working condition.This is undoubtedly a kind of good try.
The content of the invention
It is an object of the invention to provide a kind of engine air-gas premixing blender, it disclosure satisfy that engine not
With the gaseous mixture demand under operating mode, startup, idling and the accelerating mode of engine are adapted to；It can prevent from mixing gas leakage, carry
High security.
A kind of engine of the present invention air-gas premixing blender, including upper shell, it is connected to upper shell
The lower house of lower end, air intlet is provided with the side of the upper shell, and fuel gas inlet is provided with the side of the lower house,
The lower end of the lower house is provided with mixed gas outlet, it is characterized in that：
At least provided with a mixing valve, the mixing valve connection in the die cavity that the upper shell and lower house connect and compose
In the upper end of the lower house, and by the die cavity chamber at intervals of air chamber, fuel chamber and mixing chamber, the air intlet with it is empty
Air chamber communicates, and the fuel gas inlet communicates with fuel chamber, and the mixed gas outlet communicates with mixing chamber；
Horizontal rotary shaft is provided with the mixed gas outlet close to the lower house lower end, the both ends of the rotary shaft lead to respectively
Cross backbone sealing ring to be connected with the lower house, rocking arm is provided with one end of the rotary shaft, in the rotary shaft
Portion is provided with air throttle, the inwall corresponding matching of the air throttle and the mixing chamber.
Further, two structure identical mixing valves are provided with the die cavity that the upper shell and lower house connect and compose.
Further, the mixing valve includes valve support, is located at the valve seat in centre below valve support, corresponding with valve seat matches somebody with somebody
The inverted cone seal of conjunction, lower end and the connection of inverted cone seal valve core housing, be located in valve core housing return spring, be located at institute
The valve body type face between valve support bottom and valve core housing bottom is stated, in addition to is located at the diaphragm and bonnet of the valve support upper end,
Form cavity between the two, the locating dowel at center coordinates through the top of diaphragm and the valve core housing below the bonnet, described
The upper end of valve core housing is connected with diaphragm；Two pressure difference holes are provided with the edge of the bonnet, described two pressure difference holes pass through respectively
The airway being located in valve support connects with the mixing chamber.
Further, the lower surface of the lower house 2 is provided with U-lag 15, middle stomata 17 and two end stomatas in the U-lag
18 respectively with the air chamber 4 and being located at the reinforced seal ring recess 16 at the air throttle both ends and connecting.
Further, the upper shell is provided with safe plug screw.
The present invention controls combustion gas and sky using the vacuum in gas engine admission line by way of mechanical adjustment
The inlet flow sectional area of gas, and then combustion gas and air mixture ratio are controlled, to realize the regulation of air-fuel ratio.
The present invention has advantages below：
（1）Due between upper shell and lower house, using mode connects for screw between mixing valve and lower house, in upper shell with
Using mixing valve it is boundary at intervals of air chamber, fuel chamber and mixing chamber in die cavity that housing connects and composes, is pure mechanic structure, reliably
Property it is high.
（2）Because the cavity between the diaphragm of mixing valve and bonnet is provided with two pressure difference holes and is communicated with mixing chamber,
So the pressure difference above diaphragm with mixing chamber can be balanced, and the opening and closing function of valve is realized using mixing valve itself pressure difference.
（3）Because the aperture of mixing valve is controlled by the pressure difference between air chamber and mixing chamber：The pressure of air chamber acts on
Below the diaphragm of mixing valve, the pressure of mixing chamber is reached by pressure difference hole above the diaphragm of mixing valve.During engine load increase,
The increase of gaseous mixture demand, throttle opening increase, vacuum increase in mixing chamber, the diaphragm pressure difference increase up and down of mixing valve,
Diaphragm drives valve core housing to overcome deadweight and spring force to move upwards, mixing valve opening increase；Engine demand air-fuel mixture amount is reduced
When, throttle opening reduces, and mixing chamber vacuum reduces, and pressure difference reduces the diaphragm of mixing valve up and down, and valve core housing is in deadweight and bullet
Spring force effect is lower to be fallen after rise, and mixing valve opening reduces.The difference of mixing valve opening makes air-fuel ratio and mixed gas flow while become
Change, so can adapt to the startup of engine, idling and accelerating mode.
（4）Because fuel chamber is by the inverted cone containment member sealing of mixing valve bottom, top is enclosed by valve body type bread.Mixing
When device works, combustion gas is flowed out from fuel chamber, must not stop by valve body type face up, and by air mixing is blown into the case where air inlet acts on
Room.Therefore, air chamber does not have combustion gas entrance all the time, and safety coefficient is high.
Brief description of the drawings
Fig. 1 is the appearance schematic diagram of the present invention；
Fig. 2 is the sectional view of mixing valve；
Fig. 3 is the structural representation of lower house lower end；
Fig. 4 is Fig. 3 N-N sectional views；
One of sectional view of Fig. 5 present invention；
The two of the sectional view of Fig. 6 present invention.
In figure：1- upper shells, 2- lower houses, 3- mixing valves, 4- air chambers, 5- fuel chamber, 6- mixing chambers, 7-
Air intlet, 8- fuel gas inlets, 9- mixed gas outlets, 10- rotary shafts, 11- rocking arms, 12- air throttles, 13- skeletons are close
Seal, the safe plug screws of 14-, 15-U shape grooves, 16- reinforced seal ring recess, stomata in 17-, 18- ends stomata；
30- valve body types face, 31- valve supports, 32- valve seats, 33- valve core housings, 34- inverted cone seals, 35- films
Piece, 36- bonnets, 37- return springs, 38- pressure differences hole, 39- passages.
Embodiment
The present invention is described further below in conjunction with the accompanying drawings.
Referring to a kind of air-gas premixing blender of engine shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, bag
Include upper shell 1, be connected to the lower house 2 of upper shell lower end, air intlet 7 is provided with the side of the upper shell, under described
The side of housing is provided with fuel gas inlet, and mixed gas outlet 9 is provided with the lower end of the lower house, it is characterized in that：
Connect in the die cavity that the upper shell and lower house connect and compose at least provided with a mixing valve 3, the mixing valve
The upper end of the lower house is connected on, and the die cavity chamber is entered at intervals of air chamber 4, fuel chamber 5 and mixing chamber 6, the air
Mouth communicates with air chamber, and the fuel gas inlet communicates with fuel chamber, and the mixed gas outlet communicates with mixing chamber；
Horizontal rotary shaft 10, the both ends point of the rotary shaft are provided with the mixed gas outlet 9 close to the lower end of lower house 2
It is not connected by backbone sealing ring 13 and the lower house 2, rocking arm 11 is provided with one end of the rotary shaft, at described turn
The middle part of moving axis is provided with air throttle 12, the inwall corresponding matching of the air throttle and the mixing chamber.
Space between the valve body type face upper surface of upper casing intracoelomic cavity and mixing valve of air chamber-i.e., fuel chamber are located at lower casing
In the gas inlet pipeline of body, mixing chamber is-space between lower housing cavity and the valve body type face lower surface of mixing valve.It is mixed
When clutch does not work, mixing valve is taken a seat.Air chamber, fuel chamber and mixing chamber are using mixing valve as boundary；Blender work when, air and
Combustion gas flows into mixing chamber；When blender does not work, mixing valve is taken a seat.Between upper shell and lower house, mixing valve and lower house it
Between use mode connects for screw, simple in construction, reliability is high.
Two structure identical mixing valves 3 are provided with the die cavity that the upper shell 1 and lower house 2 connect and compose.
The mixing valve 3 includes valve support 31, the valve seat 32 for being located at centre below valve support and valve seat corresponding matching
Inverted cone seal 34, lower end and inverted cone seal connection valve core housing 33, be located in valve core housing return spring 37, set
Valve body type face 30 between the valve support bottom and valve core housing bottom, in addition to it is located at the diaphragm of the upper end of valve support 31
35 and bonnet 36, form cavity between the two, the locating dowel at center is through diaphragm and the valve core housing 33 below the bonnet
Top coordinates, and the upper end of the valve core housing is connected with diaphragm 35；Two pressure difference holes 38 are provided with the edge of the bonnet 36, it is described
Two pressure difference holes are connected by the airway 39 being located in valve support with the mixing chamber respectively.
Cavity between diaphragm and bonnet is communicated by two pressure difference holes with mixing chamber, can balance diaphragm upper surface with mixing
The pressure difference of room.Valve opening is mixed to be controlled by the pressure difference between air chamber and mixing chamber：The pressure of air chamber acts on mixing valve
The lower surface of diaphragm, the pressure of mixing chamber reach the upper surface of the diaphragm of mixing valve by pressure difference hole.When engine load increase
When, gaseous mixture demand increase, throttle opening increases, and vacuum increase in mixing chamber, the diaphragm upper surface of mixing valve is with
The pressure difference increase on surface, diaphragm drive valve core housing to overcome the elastic force of deadweight and return spring to move upwards, mixing valve opening increase.
When engine demand air-fuel mixture amount is reduced, throttle opening reduces, and mixing chamber vacuum reduces, the diaphragm upper surface of mixing valve
Reduce with the pressure difference of lower surface, valve core housing falls after rise in the presence of deadweight and return spring, and mixing valve opening reduces.
Be provided with U-lag 15 in the lower surface of the lower house 2, the mesopore 17 and two stomidiums 18 in the U-lag respectively with
The air chamber 4 and it is located at the reinforced seal ring recess 16 at the air throttle both ends and connects, it can be ensured that reinforced seal ring recess
Internal pressure balances with air chamber, the mixture pressure being consistently higher than in mixing chamber, prevents from mixing gas leakage, improves security.
The upper shell 1 is provided with safe plug screw 14, when compressed air pressure is too high or downstream gas output is excessive, valve element
Opening will be chronically at, causes have the danger exploded at cylinder air inlet, backs out safe plug screw, air chamber can be made
Reduction of blood pressure in high-speed, prevent the generation of danger.
Maximum air demand is about 7.5Nm3/ s, peak power up to 740~780kw, admission pressure scope is 1.3~
500KPa, can under -40 DEG C~120 DEG C environment normal operation.Rocking arm regulation throttle opening is pulled to disclosure satisfy that engine exists
Gaseous mixture demand under different operating modes.
Claims (3)
1. a kind of engine air-gas premixing blender, including upper shell（1）, be connected to the lower house of upper shell lower end
（2）, air intlet is provided with the side of the upper shell（7）, fuel gas inlet is provided with the side of the lower house, under described
The lower end of housing is provided with mixed gas outlet（9）, it is characterized in that：
At least provided with a mixing valve in the die cavity that the upper shell and lower house connect and compose（3）, the mixing valve connection
In the upper end of the lower house, and by the die cavity chamber at intervals of air chamber（4）, fuel chamber（5）And mixing chamber（6）, the sky
Gas import communicates with air chamber, and the fuel gas inlet communicates with fuel chamber, and the mixed gas outlet communicates with mixing chamber；
Close to the lower house（2）The mixed gas outlet of lower end（9）Provided with horizontal rotary shaft（10）, the both ends of the rotary shaft
Pass through backbone sealing ring respectively（13）With the lower house（2）It is connected, rocking arm is provided with one end of the rotary shaft（11）,
Air throttle is provided with the middle part of the rotary shaft（12）, the inwall corresponding matching of the air throttle and the mixing chamber；
In the upper shell（1）And lower house（2）Two structure identical mixing valves are provided with the die cavity connected and composed（3）；Institute
State mixing valve（3）Including valve support（31）, be located at the valve seat in centre below valve support（32）And valve seat corresponding matching is fallen
Cone seal part（34）, lower end and inverted cone seal connection valve core housing（33）, the return spring that is located in valve core housing（
37）, the valve body type face that is located between the valve support bottom and valve core housing bottom（30）, in addition to it is located at the valve support（31）
The diaphragm of upper end（35）And bonnet（36）, form cavity between the two, below the bonnet locating dowel at center through diaphragm with
The valve core housing（33）Top coordinate, the upper end of the valve core housing and diaphragm（35）Connection；In the bonnet（36）Edge
Provided with two pressure difference holes（38）, described two pressure difference holes airway by being located in valve support respectively（39）With the mixing chamber
Connection.
2. engine according to claim 1 air-gas premixing blender, it is characterized in that：The lower house（2）
Lower surface be provided with U-lag（15）, the middle stomata in the U-lag（17）With two gas stomidiums（18）Respectively with the air chamber
（4）With the reinforced seal ring recess for being located at the air throttle both ends（16）Connection.
3. engine according to claim 1 or 2 air-gas premixing blender, it is characterized in that：The upper shell
（1）It is provided with safe plug screw（14）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510948115.8A CN105402049B (en) | 2015-12-17 | 2015-12-17 | A kind of engine air-gas premixing blender |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510948115.8A CN105402049B (en) | 2015-12-17 | 2015-12-17 | A kind of engine air-gas premixing blender |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105402049A CN105402049A (en) | 2016-03-16 |
| CN105402049B true CN105402049B (en) | 2018-02-09 |
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ID=55467757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510948115.8A Active CN105402049B (en) | 2015-12-17 | 2015-12-17 | A kind of engine air-gas premixing blender |
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| Country | Link |
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| CN (1) | CN105402049B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3464803A (en) * | 1966-03-30 | 1969-09-02 | Ambac Ind | Variable venturi carburetor |
| CN2656652Y (en) * | 2003-10-14 | 2004-11-17 | 重庆鼎辉机电有限公司 | Diaphragm-type mixer |
| CN202531303U (en) * | 2012-01-18 | 2012-11-14 | 中国石油天然气股份有限公司 | Gas mixer of natural gas engine |
| CN103277214A (en) * | 2013-05-14 | 2013-09-04 | 重庆金之川动力机械有限公司 | Efficient self-adaptive gas device of gas engine |
| CN205190060U (en) * | 2015-12-17 | 2016-04-27 | 重庆红江机械有限责任公司 | Air - gas mixes blender in advance for engine |
-
2015
- 2015-12-17 CN CN201510948115.8A patent/CN105402049B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3464803A (en) * | 1966-03-30 | 1969-09-02 | Ambac Ind | Variable venturi carburetor |
| CN2656652Y (en) * | 2003-10-14 | 2004-11-17 | 重庆鼎辉机电有限公司 | Diaphragm-type mixer |
| CN202531303U (en) * | 2012-01-18 | 2012-11-14 | 中国石油天然气股份有限公司 | Gas mixer of natural gas engine |
| CN103277214A (en) * | 2013-05-14 | 2013-09-04 | 重庆金之川动力机械有限公司 | Efficient self-adaptive gas device of gas engine |
| CN205190060U (en) * | 2015-12-17 | 2016-04-27 | 重庆红江机械有限责任公司 | Air - gas mixes blender in advance for engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105402049A (en) | 2016-03-16 |
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