CN112576416A - Engine oil-gas dual-purpose air-fuel mixing device - Google Patents
Engine oil-gas dual-purpose air-fuel mixing device Download PDFInfo
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- CN112576416A CN112576416A CN202011593166.0A CN202011593166A CN112576416A CN 112576416 A CN112576416 A CN 112576416A CN 202011593166 A CN202011593166 A CN 202011593166A CN 112576416 A CN112576416 A CN 112576416A
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- air
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- machine body
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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
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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
- F02M13/00—Arrangements of two or more separate carburettors; Carburettors using more than one fuel
- F02M13/08—Carburettors adapted to use liquid and gaseous fuels, e.g. alternatively
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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
- F02M17/00—Carburettors having pertinent characteristics not provided for in, or of interest apart from, the apparatus of preceding main groups F02M1/00 - F02M15/00
- F02M17/34—Other carburettors combined or associated with other apparatus, e.g. air filters
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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)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The invention relates to the technical field of engines, and discloses an engine oil-gas dual-purpose air-fuel mixing device, which is characterized in that: the engine comprises an engine body provided with an air inlet and a mixed gas outlet, wherein the engine body is provided with a throttle valve assembly and an annular throat assembly; the throttle valve component comprises a valve rod which is rotatably connected with the machine body, and a hollow valve sheet is fixed on the valve rod; the annular throat component comprises an annular throat part and a plurality of fuel gas measuring holes arranged on the annular throat part, the fuel gas measuring holes are uniformly distributed along the circumferential direction of the annular throat part, an annular groove is formed between the annular throat part and the machine body, and the annular groove is communicated with the fuel gas measuring holes; the engine body is provided with a gas inlet which is communicated with the annular groove. The invention has simple structure, can change the prior fuel oil generator set or general gasoline engine into oil-gas dual-purpose, expands the fuel application range of the equipment, reduces the use cost, reduces the emission of harmful gas and greatly reduces the equipment cost.
Description
Technical Field
The invention relates to the technical field of engines, and particularly discloses an oil-gas dual-purpose air-fuel mixing device of an engine.
Background
At present, the vehicle power (engine) adopts a device with oil and gas dual fuel, which is mature and common: one is a fuel supply and mixing system device with mutually independent oil and gas and capable of being switched to use, and the device generally has two sets of fuel supply air-fuel mixing systems which can be switched to use; the other is formed by reforming fuel power, commonly called 'oil to gas', that is, on the basis of the original fuel power, a set of gas mixer is added, so that the power can also use gas as fuel, and the purpose that the dual fuel can be used is achieved.
In either way, not only are the feeding system and the mixing device expensive, but the manufacturing or modification costs are also very high, and after all, the parts used for automobile power are expensive. In addition, domestic dual-fuel generator sets are not mature and high in manufacturing cost, and most manufacturers are in an exploration stage. In fact, the low-power general fuel engine (general engine for short) has low price and wide application, so the sales volume (2500 thousands in 2019) and the usage volume (9000 thousands) are remarkable. At present, because the oil-fired general gasoline engine pollutes the environment and has higher oil-fired cost, manufacturers and users face unprecedented pressure, and with the rise of new gas energy, the trend of replacing the traditional petrochemical oil-fired energy with the power clean gas energy is a necessary trend.
Both manufacturers and users want to add a low-cost universal device on the basis of not changing the original structure, so as to realize dual purposes of oil and gas. For example, biogas generated by rural livestock manure can be utilized for power generation, so that on one hand, pollution is reduced (the greenhouse effect caused by biogas pollution is 22 times of that of carbon dioxide), fuel is saved, on the other hand, when the biogas is insufficient, the fuel can be used instead, the power generation is ensured to be continued, and the device has two purposes and is flexible and convenient to use; for another example, a user of a general fuel oil generator set or agricultural mechanical power can realize fuel switching by only adding a set of oil-gas conversion device with low cost, and if the fuel oil is converted into fuel gas (methane, natural gas, oilfield associated gas, liquefied petroleum gas, shale gas, landfill gas and the like), the environment is protected, and meanwhile, the fuel cost is reduced by 30% -50%.
Disclosure of Invention
The invention aims to provide an engine oil-gas dual-purpose air-fuel mixing device to solve the problem of 'oil-gas change' of fuels of traditional medium-and-small-power fuel oil generating sets and 'general engines'.
In order to achieve the above object, the basic scheme of the invention is as follows: an engine oil-gas dual-purpose air-fuel mixing device comprises a machine body provided with an air inlet and a mixed gas outlet, wherein the machine body is provided with a throttle valve assembly and an annular throat assembly; the throttle valve component comprises a valve rod which is rotatably connected with the machine body, and a hollow valve sheet is fixed on the valve rod; the annular throat component comprises an annular throat part and a plurality of fuel gas measuring holes arranged on the annular throat part, the fuel gas measuring holes are uniformly distributed along the circumferential direction of the annular throat part, an annular groove is formed between the annular throat part and the machine body, and the annular groove is communicated with the fuel gas measuring holes; the engine body is provided with a gas inlet which is communicated with the annular groove.
The principle and the beneficial effects of the invention are as follows: in the scheme, the engine body can be directly installed on the traditional medium-small power fuel oil generator set and a carburetor of a general engine, so that the engine body is communicated with the carburetor. When using gaseous fuels, such as: natural gas, methane gas, etc., the supply of liquid fuel oil, etc., into the carburetor is stopped.
When the engine works, negative pressure generated by an engine cylinder is pumped into air through the air inlet, the air passes through the annular throat part and forms negative pressure at the annular throat part, and under the action of the negative pressure, gas is sucked into the annular throat part through the gas inlet, the annular groove and the gas metering orifice. Meanwhile, the negative pressure generated by the engine cylinder and the negative pressure generated by the annular throat part accelerate the gas flow in the annular throat part, so that the gas and the air are more uniformly mixed.
The valve rod is rotated to drive the air valve piece to rotate by a certain angle, so that the amount of air sucked into the engine body can be adjusted, the mixing ratio of the gas and the air is adjusted, and the gas can be fully combusted.
In the scheme, the engine body is directly communicated with a traditional medium-low power diesel generator set and a carburetor of a 'general engine', the medium-low power diesel generator set, the 'general engine' and the like can directly have the dual-purpose function of oil and gas, the oil and gas are dual-purpose, the use cost is greatly reduced, and when fuel gas is used, the emission of harmful gas is also reduced.
Further, the machine body is provided with an exhaust gas inlet communicated with the annular groove.
Has the advantages that: when the power of the generator set or the 'general engine' works, combustible waste gas is generated at the engine oil tank and the cylinder cover, and the waste gas is sucked into the annular throat part through the pipeline to be mixed with air under the negative pressure action of the engine cylinder in order to avoid polluting the atmosphere. The waste gas is sucked into the cylinder to be ignited and combusted, and is converted into power for power generation or other purposes, so that the pollution of the waste gas to the environment is greatly reduced.
Further, a handle is fixed at the upper end of the valve stem.
Has the advantages that: when the air quantity entering the machine body needs to be adjusted, an operator holds the handle to drive the valve rod to rotate, so that the air valve piece rotates. The handle is held by an operator, so that the contact area of the handle and the valve rod is increased, and the valve rod can be conveniently adjusted by the operator.
Further, a sliding-resistant gasket sleeved on the valve rod is arranged between the handle and the machine body, and the sliding-resistant gasket is fixed on the machine body.
Has the advantages that: because a certain gap is formed between the valve rod and the machine body, the gap between the valve rod and the machine body is sealed through the anti-slip gasket, so that the leakage of gas is reduced.
Further, the anti-slip washer is made of a polytetrafluoroethylene material.
Has the advantages that: because the engine body is arranged on the carburetor, the high temperature generated by the engine can be transmitted to the engine body, the engine body has excellent heat resistance and cold resistance, and can be used at the temperature of minus 180-260 ℃ to avoid the anti-slip gasket from deforming due to high temperature, so that the anti-slip gasket can be used for a long time, and the valve rod is prevented from rotating.
Further, the lower end of the valve rod penetrates through the machine body, the lower end of the valve rod is connected with a nut in a threaded mode, and a gasket is arranged between the nut and the machine body.
Has the advantages that: when the valve rod drives the air valve sheet to rotate by a certain angle, after the air inlet is adjusted, under the action of the anti-slip gasket and the gasket, the valve rod keeps the air valve sheet at the rotating angle under the condition of no other acting force, and further, the air is ensured to be basically unchanged as much as possible each time. When the angle between the air valve sheet and the air inlet needs to be adjusted again, the operator drives the valve rod and the air valve sheet to rotate by a corresponding angle.
Further, the air inlet is communicated with an air filter.
Has the advantages that: air enters the machine body through the air inlet, and impurities and the like in the air are filtered through the air filter.
Further, the gas inlet is communicated with a gas valve.
Has the advantages that: in the working process of the engine, the gas valve and the throttle valve handle are finely adjusted to enable the air-fuel ratio to reach the optimal proportion.
Further, the air filter comprises a hollow shell, an air inlet communicated with the shell is formed in the shell, a filter screen is fixed in the shell, and the filter screen is located between the air inlet and the air inlet.
Has the advantages that: the air enters into the shell, then the air enters into the machine body through the filter screen, namely the filter screen can filter impurities in the air, and the influence of the impurities on the engine is reduced.
Furthermore, the inner diameter of the annular throat part is phi 19-30, and the aperture of the gas metering hole is phi 2-5.
Has the advantages that: the inner diameter of the annular throat part is phi 19-30, and the aperture of the gas metering hole is phi 2-5, so that the gas and the air are mixed, and the optimal air-fuel ratio is obtained as far as possible.
Drawings
FIG. 1 is a front view of an air-fuel mixture device for an engine according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an air-fuel mixture device for engine oil and gas in an embodiment of the invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the engine comprises a machine body 11, an air inlet 12, an exhaust gas inlet 13, a mixed gas outlet 14, an annular throat part 15, a gas metering hole 16, a gas inlet 17, a gas valve 171, a nut 18, an air throttle assembly 21, a handle 22, a sliding-resistant gasket 23, a valve rod 24, an air valve piece 25, an air filter 31, a carburetor 41, an oil injection pipe 42, an oil circuit switch 43, a carburetor valve piece 44 and a gas outlet 45.
Example (b):
substantially as shown in figures 1 to 2 of the accompanying drawings: an air-fuel mixing device for engine oil and gas comprises a hollow engine body 11, wherein a mixed gas outlet 14 is formed in one side of the engine body 11, and an air inlet 12 is formed in the other side of the engine body 11. An air filter 31 is fixed on the machine body 11 through screws, in the embodiment, the air filter 31 comprises a shell fixed on the machine body 11 through bolts, an air inlet is formed in the shell, a filter screen is arranged between the air inlet and the air inlet 12, and the filter screen is fixed on the shell through screws.
In this embodiment, the engine oil-gas dual-purpose air-fuel mixing device is installed on the existing medium-small power diesel generator set or the carburetor 41 of the general gasoline engine. Specifically, the method comprises the following steps: the mixture outlet 14 communicates with the carburetor 41. The carburetor 41 is communicated with a fuel injection pipe 42, the fuel injection pipe 42 is communicated with an oil passage switch 43, the carburetor 41 is provided with a gas outlet 45, and the carburetor 41 is provided with a carburetor flap 44. In this embodiment, the carburetor valve flap 44 can be directly detached from the carburetor 41, or the carburetor valve flap 44 can be adjusted to a certain angle, so that the carburetor 41 and the body 11 are always in a communication state.
In this embodiment, an annular throat assembly is disposed on the left side in the machine body 11, the annular throat assembly includes an annular throat part 15 and a plurality of gas measuring holes 16 formed in the annular throat part 15, the gas measuring holes 16 are uniformly distributed along the circumferential direction of the annular throat part 15, an annular groove is formed between the annular throat part 15 and the machine body, the annular groove is communicated with the gas measuring holes 16, a gas inlet 17 communicated with the annular groove is formed in the machine body 11, and the gas inlet 17 is communicated with a gas valve 171 through a pipeline. The body 11 is provided with a waste gas inlet 13 communicated with the annular groove, the waste gas inlet 13 is communicated with a pipeline (not shown in the figure), and the pipeline communicated with the waste gas inlet 13 is arranged at the oil tank and the cylinder cover of a generator set or a general gasoline engine. The middle part of the annular throat part 15 is circular in cross section, the inner diameter is phi 19-30, and the aperture of the gas metering hole 16 is phi 2-5.
The right side of organism 11 is provided with throttle subassembly 21, and throttle subassembly 21 includes valve stem 24, and valve stem 24 rotates with organism 11 to be connected, and the fix with screw has the air door piece 25 that is located organism 11 on the valve stem 24, and the upper end bolt fastening of valve stem 24 has handle 22, is provided with the antiskid packing ring 23 of cover on valve stem 24 between handle 22 and the organism 11, and antiskid packing ring 23 is made by the polytetrafluoroethylene material in this embodiment, and other similar materials can also be selected certainly, such as: the lower end of the valve rod 24 penetrates through the machine body 11, the lower end of the valve rod 24 is connected with a plurality of nuts 18 in a threaded mode, a gasket sleeved on the valve rod 24 is arranged between the nuts 18 and the machine body, and the gasket is tightly pressed on the machine body through the nuts 18.
The specific implementation process is as follows:
after the engine oil-gas dual-purpose air-fuel mixing device is installed on the existing medium-small power diesel generator set or the carburetor 41 of a general engine, an operator adjusts the opening degree of a gas valve 171 to adjust the gas inlet amount, meanwhile, the operator holds a handle 22 to drive a valve rod 24 to rotate, the valve rod 24 drives an air valve piece 25 to rotate to adjust the opening degree of an air inlet 12, and then the air inlet amount is adjusted to adjust the air-fuel ratio of gas and air. When the air-fuel ratio is adjusted, the valve stem 24 will remain unchanged by the anti-slip washer 23 and the washer, i.e.: the air-fuel ratio in the machine body 11 does not substantially change. Of course, when the operator needs to rotate the valve stem 24, the friction of the anti-slip washer 23 and the washer can be overcome to rotate the valve stem 24 and the air flap 25.
When gas (natural gas, methane and the like) is used, the oil circuit switch 43 is closed to stop supplying fuel oil into the carburetor 41, for example, "general machine" is taken as an example, when the general machine works, air is sucked into the engine through the air filter 31 and the annular throat part 15 by negative pressure generated by a cylinder of the engine, negative pressure is generated in the annular throat part 15 due to the fact that the gas flows in the annular throat part 15 (venturi principle), the gas is sucked into the annular throat part 15 through the gas valve 171, the gas inlet 17, the annular groove and the gas metering holes 16, and the gas and the air are fully mixed due to the fact that the gas metering holes 16 are uniformly distributed along the circumferential direction of the annular throat part 15, and mixed gas is formed. Meanwhile, because the annular throat part 15 generates negative pressure, the pipeline communicated with the waste gas inlet 13 is arranged at the oil tank and the cylinder cover of the generator set or the general gasoline engine, when the engine works, combustible waste gas generated at the oil tank and the cylinder cover is sucked into the annular throat part 15, the combustible waste gas passes through the gas metering hole 16, so that the combustible waste gas uniformly enters the annular throat part 15, the combustible waste gas and the mixed gas are uniformly mixed, and are sucked into the engine through the gas outlet 45 of the carburetor 41 to be combusted, the combustible waste gas is sent into the engine to be combusted, and the pollution of the combustible waste gas to the environment is greatly reduced. The negative pressure generated by the annular throat part 15 and the negative pressure generated by the engine cylinder accelerate the gas flow in the annular throat part 15, and the gas and the waste gas are sucked into the annular throat part 15 through the gas metering holes 16, so that the gas, the combustible waste gas and the air are mixed more uniformly.
When the gas is used up, the gas valve 171 is closed, the oil passage switch 43 is opened, the air valve piece 25 is adjusted again, the opening degree of the air inlet 12 is adjusted, and the air-fuel ratio of the fuel oil and the air is adjusted, so that the fuel oil is injected into the carburetor 41 through the fuel injection pipe 42 to be mixed, and then the mixture is sent into the engine to be combusted.
The foregoing is merely an example of the present invention and common general knowledge in the art of specific structures and/or features of the invention has not been set forth herein in any way. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. Dual-purpose air-fuel mixture device of engine oil gas, its characterized in that: the engine comprises an engine body provided with an air inlet and a mixed gas outlet, wherein the engine body is provided with a throttle valve assembly and an annular throat assembly;
the throttle valve component comprises a valve rod which is rotatably connected with the machine body, and a hollow valve sheet is fixed on the valve rod;
the annular throat component comprises an annular throat part and a plurality of fuel gas measuring holes arranged on the annular throat part, the fuel gas measuring holes are uniformly distributed along the circumferential direction of the annular throat part, an annular groove is formed between the annular throat part and the machine body, and the annular groove is communicated with the fuel gas measuring holes;
the engine body is provided with a gas inlet which is communicated with the annular groove.
2. The engine air-fuel dual-purpose air-fuel mixing device of claim 1, characterized in that: the machine body is provided with a waste gas inlet communicated with the annular groove.
3. The engine air-fuel dual-purpose air-fuel mixing device of claim 2, characterized in that: the upper end of the valve rod is fixed with a handle.
4. The engine air-fuel dual-purpose air-fuel mixing device of claim 3, characterized in that: a sliding-resistant gasket sleeved on the valve rod is arranged between the handle and the machine body, and the sliding-resistant gasket is fixed on the machine body.
5. The engine air-fuel dual-purpose air-fuel mixing device of claim 4, characterized in that: the anti-slip washer is made of polytetrafluoroethylene material.
6. The engine air-fuel dual-purpose air-fuel mixing device of claim 5, characterized in that: the valve rod penetrates through the lower end machine body, the lower end of the valve rod is connected with a nut in a threaded mode, and a gasket is arranged between the nut and the machine body.
7. The engine air-fuel dual-purpose air-fuel mixing device of claim 6, characterized in that: the air inlet is communicated with an air filter.
8. The engine air-fuel mixture device as set forth in claim 7, wherein: the gas inlet is communicated with a gas valve.
9. The engine air-fuel dual-purpose air-fuel mixing device of claim 8, characterized in that: the air filter comprises a hollow shell, an air inlet communicated with the shell is formed in the shell, a filter screen is fixed in the shell and is located between an air inlet and the air inlet.
10. The engine air-fuel mixture device as set forth in claim 9, wherein: the inner diameter of the annular throat part is phi 19-30, and the aperture of the gas metering hole is phi 2-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011593166.0A CN112576416A (en) | 2020-12-29 | 2020-12-29 | Engine oil-gas dual-purpose air-fuel mixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011593166.0A CN112576416A (en) | 2020-12-29 | 2020-12-29 | Engine oil-gas dual-purpose air-fuel mixing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112576416A true CN112576416A (en) | 2021-03-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011593166.0A Pending CN112576416A (en) | 2020-12-29 | 2020-12-29 | Engine oil-gas dual-purpose air-fuel mixing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112576416A (en) |
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2020
- 2020-12-29 CN CN202011593166.0A patent/CN112576416A/en active Pending
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