CN112628031A - Air-entraining injection device with wall-attached oil drop stripping function - Google Patents
Air-entraining injection device with wall-attached oil drop stripping function Download PDFInfo
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- CN112628031A CN112628031A CN202110032440.5A CN202110032440A CN112628031A CN 112628031 A CN112628031 A CN 112628031A CN 202110032440 A CN202110032440 A CN 202110032440A CN 112628031 A CN112628031 A CN 112628031A
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- Prior art keywords
- oil
- mixing
- injection
- nozzle
- electromagnetic valve
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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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
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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
- F02M29/00—Apparatus for re-atomising condensed fuel or homogenising fuel-air mixture
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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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
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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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
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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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
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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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
Abstract
The invention discloses an air entrainment injection device with a wall-attached oil drop stripping function, and belongs to the technical field of fuel injection. The device comprises an oil injection assembly, an air inlet pipe, a mixing pipe and a mixed injection assembly. The oil injection assembly comprises an oil inlet pipe, an oil injection electromagnetic valve and an oil injection nozzle; the oil inlet pipe is connected with an oil nozzle through an oil injection electromagnetic valve, the oil nozzle and an air inlet pipe are connected with a mixing pipe, the mixing pipe is connected with an oil-gas mixing injection electromagnetic valve, and the oil-gas mixing injection electromagnetic valve is connected with an oil-gas mixing nozzle; a mixing cavity is formed in the mixing tube, an ultrasonic vibration plate group is arranged in the mixing cavity, and the ultrasonic vibration plate group is in a ring sleeve shape and is embedded in the wall of the mixing cavity; the ultrasonic vibrating piece group peels the wall-attached fuel oil off the wall surface and breaks the wall-attached fuel oil into small liquid drops. The device avoids the problem of wall-attached oil film generated by fuel colliding with the wall in a narrow space of the mixing pipe, thereby improving the atomization effect, improving the dynamic response performance of the engine and improving the fuel economy.
Description
Technical Field
The invention relates to an air entrainment injection device with a wall-attached oil drop stripping function, and belongs to the technical field of fuel injection.
Background
The air entrainment injection system mixes with fuel in the mixing chamber through compressed air, then injects the gas-liquid two-phase mixture into the jar, and the fuel is entrained by the high-speed air current, atomizes into smaller liquid drop and evaporates rapidly. This technique can achieve atomization and combustion of fuel at a relatively low fuel supply pressure.
However, because the size of the oil-gas mixing cavity is small, the phenomenon of wall collision is inevitably generated after fuel is injected into the mixing cavity, the fuel is attached to the wall to form an oil film, the fuel cannot be fully mixed with air in the mixing cavity, and the evaporation speed is slow. When the mixed gas injection electromagnetic valve is opened, fuel particles suspended in the mixing cavity are injected into the cylinder along with air flow, but most of the oil film on the wall surface is still remained in the mixing cavity, so that the dynamic response of the engine is poor. Although a small part of oil film can enter the cylinder along with the airflow, the fuel particle size is large, the atomization is poor, the hydrocarbon emission is increased, and the fuel economy is reduced. Therefore, how to improve the wall attaching characteristic of the fuel in the mixing cavity in the air-entraining injection process has important significance for improving the performance of the whole injection system.
Ultrasonic waves refer to sound waves with a vibration frequency above 20000Hz, which are essentially mechanical vibration modes, generally propagating in the form of longitudinal waves in an elastic medium, a form of energy propagation. Its frequency is high, wavelength is short, and it has good beaming property and directivity along straight line propagation in a certain distance. According to the characteristics, the directional high-frequency vibration of ultrasonic waves can be utilized to vibrate the oil film attached to the wall to be stripped from the wall surface, the oil film is crushed to form smaller liquid drops, the liquid drops participate in mixing and evaporation in the air, and after the mixed gas electromagnetic valve is opened, the mixed gas enters an engine cylinder under the entrainment of high-speed air flow, can be further atomized and mixed, and better participates in combustion.
And the air clamping block device comprises an oil nozzle mounting assembly, an air nozzle mounting assembly, a swirler, an oil inlet and an air inlet. The method is characterized in that: the air inclusion block device is used for installing a fuel nozzle, a mixer nozzle and a swirler, and the swirler is arranged at the mixing cavity; the oil nozzle mounting assembly is used for mounting a fuel nozzle; the air nozzle mounting assembly is communicated with the oil nozzle mounting assembly and is used for mounting a mixed gas nozzle; the oil inlet is arranged on the oil nozzle mounting assembly to input oil to the mixing cavity; the air inlet is communicated with the mixing cavity and is used for inputting compressed air to the mixing cavity; the swirler is arranged at the mixing cavity and used for mixing the compressed air and the oil and outputting the mixed air through the mixed air nozzle; the pressure stabilizing cavity is arranged between the air inlet and the mixing cavity and is communicated with the air inlet and the mixing cavity respectively. The invention mixes oil and gas through the swirler in the air inclusion block, improves the atomization effect of fuel oil spray under lower oil supply pressure, and particularly improves the common aviation heavy oil atomization effect of an aeroengine, thereby improving the fuel oil economy, the dynamic property and the emission performance of the engine. But the mixing chamber volume is very little among the above-mentioned technique, and the swirler is limited to the effect of oil-gas mixture, and attaches the fuel of wall in the mixing chamber and can't get into the swirler and participate in the oil-gas mixture, and then causes the problem that the atomization effect is influenced.
In addition, the air entrainment injector comprises a shell, an oil inlet assembly, an electric connector, an electromagnetic circuit assembly, a flow adjusting assembly, a valve assembly and an air inlet assembly. The valve component comprises a valve core, a valve core connecting rod and a valve seat, and the injection end of the valve seat and the injection end of the valve core connecting rod are matched with each other to form a Laval nozzle; a waist-shaped arc-shaped spraying cavity is arranged in the spraying end of the valve seat and consists of an arc-shaped air expanding section, an arc-shaped contracting section and an arc-shaped expanding section which are sequentially connected together; a gas-liquid mixing cavity is formed by the valve core, the cavity between the oil inlet assembly and the cavity between the valve core and the air inlet assembly; the injection end of the valve core connecting rod is provided with an injection hole, and the end part of the injection end of the valve core connecting rod is provided with an arc-shaped diffusion end matched with the arc-shaped expansion section of the valve seat. Under the action of the valve core connecting rod, the liquid-gas two-phase flow is sprayed from the spray hole of the valve core connecting rod to the arc-shaped gas expansion section, supersonic speed is formed at the joint of the arc-shaped contraction section and the arc-shaped gas expansion section, and hydraulic oil is torn into particles by the speed of the gas under the action of the supersonic speed. Therefore, the air-entraining injector can achieve better atomization effect at low temperature and low pressure, and the atomization effect of the air-entraining injector is far superior to that of a common single-phase fluid injector. However, the above technology does not consider the problems that the atomization effect is reduced and the reaction is slow due to the fact that oil drops are large because the fuel adheres to the wall when the fuel and the compressed air are mixed in the mixing cavity.
In the inventions, the problem of fuel wall attachment caused by narrow space of the fuel-air mixing cavity is not considered, and the adverse effect on the performances of dynamic response, emission, fuel economy and the like of the engine is caused.
Disclosure of Invention
The invention aims to solve the problems of poor dynamic response of an engine, increased hydrocarbon emission, reduced fuel economy and the like caused by wall attachment of fuel oil when the fuel oil and compressed air are mixed in a mixing cavity, and provides an air-entraining injection device with a wall attachment oil drop stripping function.
In order to achieve the purpose, the invention adopts the following technical scheme:
the air entrainment injection device with the wall-attached oil drop stripping function comprises an oil injection assembly, an air inlet assembly, a mixing pipe and a mixing injection assembly;
the oil injection assembly comprises an oil inlet pipe, an oil injection electromagnetic valve and an oil injection nozzle, and the oil pressure of the oil injection nozzle is greater than the air pressure of the air inlet pipe; the air inlet assembly comprises an air inlet pipe; the mixed injection assembly comprises an oil-gas mixed injection electromagnetic valve and an oil-gas mixed nozzle;
the oil spraying opening time of the oil spraying electromagnetic valve is earlier than that of the oil-gas mixed spraying electromagnetic valve;
the mixing pipe internally comprises an ultrasonic vibrating piece group, which specifically comprises the following components: the inside shaping of hybrid tube has the hybrid chamber, installs in the hybrid chamber ultrasonic vibration piece group, ultrasonic vibration piece group is the ring cover column structure of compriseing a plurality of convex ultrasonic vibration piece, inlays in the hybrid chamber wall.
The connection relation of each part in the air entrainment injection device is as follows:
the oil inlet pipe is connected with an oil nozzle through an oil injection electromagnetic valve, and specifically comprises the following steps: the oil injection electromagnetic valve is connected with the oil inlet pipe and the oil injection nozzle through threads; fuel sprayer and intake pipe all link to each other with the hybrid tube, specifically do: the oil nozzle and the air inlet pipe are connected with the mixing pipe through threads; contain ultrasonic vibration piece group in the hybrid tube, the hybrid tube links to each other with the oil-gas mixture injection solenoid valve, and the oil-gas mixture injection solenoid valve links to each other with the oil-gas mixture nozzle, specifically: the oil-gas mixing injection electromagnetic valve is connected with the mixing pipe and the oil-gas mixing nozzle through threads.
The installation relationship and the installation process of each part in the air-entraining injection device are as follows:
the oil inlet pipe is connected with the oil nozzle through the oil injection electromagnetic valve; the lower end of the air inlet pipe is connected with the mixing pipe; the mixing tube is connected with an internal ultrasonic vibrating reed; the outlet end of the mixing pipe is connected with an oil-gas mixed injection electromagnetic valve; and an oil-gas mixing nozzle is installed at one end of the oil-gas mixing injection electromagnetic valve.
The functions of each component in the air entrainment injection device are as follows:
the oil inlet pipe plays a role in oil inlet, and the oil injection electromagnetic valve plays a role in controlling on-off; the air inlet pipe is used for introducing air so as to be mixed with oil liquid for atomization; the oil-gas mixing injection electromagnetic valve plays a role in controlling on-off, and the oil-gas mixing nozzle plays a role in oil injection; the mixing pipe has a mixing function, and the ultrasonic vibrating piece group enables the coanda oil to separate from the wall surface and form small liquid drops; the oil spraying opening time of the oil spraying electromagnetic valve is earlier than that of the oil-gas mixed injection electromagnetic valve, so that the oil spraying effect is achieved.
Has the advantages that:
compared with the existing air entrainment spraying device, the air entrainment spraying device with the wall-attached oil drop stripping function has the following beneficial effects:
1. the device utilizes the wall surface of a mixing chamber in the mixing pipe to be provided with the ultrasonic vibrating piece group, so that the wall-attached fuel can be peeled off the wall surface and form small liquid drops, and the problems of large liquid drop particle size, slow evaporation, poor atomization effect, uneven mixing, poor engine responsiveness and the like caused by the wall attachment of the fuel when the fuel and compressed air are mixed in the mixing chamber are solved;
2. the fuel oil sprayed into the mixing cavity by the fuel oil nozzle in the device is completely sprayed into the cylinder when the mixed injection nozzle is opened, no residue exists, the fuel oil is more accurately metered, and the economy is better;
3. the device utilizes the ultrasonic vibration piece group in the mixing cavity to strip the wall-attached fuel oil and suspend the wall-attached fuel oil in the air. When the air-fuel mixture solenoid valve is opened, these suspended oil droplets are more likely to be injected into the cylinder along with the air flow.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of the internal structure of an entrainment jet device with a coanda oil drop stripping function according to the present invention;
illustration of the drawings:
1. an oil inlet pipe; 2. an oil injection solenoid valve; 3. an oil jet; 4. an air inlet pipe; 5. a mixing tube; 6. an oil-gas mixed injection electromagnetic valve; 7. an oil-gas mixing nozzle; 8. an ultrasonic vibrating piece group.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, wherein the air entrainment jet device with the coanda oil drop stripping function is provided in the following.
Example 1
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The ultrasonic vibration plate in the device peels the wall-attached oil off the wall surface and breaks the wall surface, but not an ultrasonic nozzle used in industry, and directly atomizes the oil beam in the oil pipe, and the two have great difference in structure.
The invention will be further described with reference to the accompanying drawings in which:
as shown in fig. 1, an air entrainment jetting apparatus with a wall-attached oil drop stripping function includes an oil injection assembly, an air intake assembly, a mixing pipe, and a mixing and jetting assembly. The oil spout subassembly is including advancing oil pipe 1, oil spout solenoid valve 2, oil sprayer 3, it connects oil sprayer 3 through oil spout solenoid valve 2 to advance oil pipe 1, the subassembly that admits air includes intake pipe 4, 4 lower extremes in intake pipe are connected with hybrid tube 5, 5 inside ultrasonic vibration piece groups 8 that are provided with of hybrid tube, 5 exit ends of hybrid tube are connected with the mixed injection subassembly, the mixed injection subassembly includes the oil-gas mixture injection solenoid valve 6 and the oil-gas mixture injection nozzle 7 of 6 one end installations of oil-gas mixture injection solenoid valve.
Preferably: the oil injection electromagnetic valve 2 is connected with the oil inlet pipe 1 and the oil injection nozzle 3 through threads, the oil inlet pipe 1 plays an oil inlet role, and the oil injection electromagnetic valve 2 plays a role in controlling on-off; the oil nozzle 3 and the air inlet pipe 4 are connected with the mixing pipe 5 through threads, and the air inlet pipe 4 plays a role in air inlet so as to be mixed with oil liquid for atomization; the oil-gas mixing injection electromagnetic valve 6 is connected with the mixing pipe 5 and the oil-gas mixing nozzle 7 through threads, the oil-gas mixing injection electromagnetic valve 6 plays a role in controlling on-off, and the oil-gas mixing nozzle 7 plays a role in oil injection; mixing tube 5 internal forming has the hybrid chamber, and ultrasonic vibration piece group 8 is the ring cover column structure that comprises a plurality of circular arc ultrasonic wave tremblers, inlays in the hybrid chamber wall, and mixing tube 5 plays the mixing action, and ultrasonic vibration piece group 8 peels off and the breakage with attaches wall fluid.
The working principle is as follows: simultaneously to providing initial fluid in advancing oil pipe 1, provide high-pressure gas in the intake pipe 4 simultaneously, utilize the external control ware control ultrasonic wave vibrating piece group 8 on the engine to start, when needs spout atomizing oil, external control ware opens oil injection solenoid valve 2, initial atomizing fluid reachs inside the hybrid tube 5 this moment, ultrasonic wave vibrating piece group 8 is installed to the hybrid tube inside mixing chamber wall, can peel off the wall and break for the droplet that satisfies the requirement with the attaches wall fuel, simultaneously with the inside high-pressure gas mixture of intake pipe 4, when the oil gas mixing sprays the solenoid valve and opens, these fuel that suspend in the air jets into the jar together with the air current more easily, further atomizing and after mixing, carry out the combustion and release heat.
Example 2
The difference between embodiment 2 and embodiment 1 is that the oil pressure of the oil nozzle 3 is greater than the air pressure of the intake pipe 4, and the oil injection solenoid valve 2 opens the oil injection earlier than the oil-air mixture injection solenoid valve 6, so that the oil injection effect is achieved.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (6)
1. The utility model provides a press from both sides gas injection apparatus with attach wall oil droplet and peel off function which characterized in that: the device comprises an oil injection assembly, an air inlet assembly, a mixing pipe and a mixed injection assembly;
the oil injection assembly comprises an oil inlet pipe, an oil injection electromagnetic valve and an oil injection nozzle; the air inlet assembly comprises an air inlet pipe; the mixed injection assembly comprises an oil-gas mixed injection electromagnetic valve and an oil-gas mixed nozzle;
the mixing pipe internally comprises an ultrasonic vibrating piece group, which specifically comprises the following components: a mixing cavity is formed in the mixing pipe, and the ultrasonic vibrating piece group is arranged in the mixing cavity;
the connection relation of each part in the air entrainment injection device is as follows:
the oil inlet pipe is connected with an oil nozzle through an oil injection electromagnetic valve, the oil nozzle and the air inlet pipe are both connected with a mixing pipe, the mixing pipe contains an ultrasonic vibrating sheet, the mixing pipe is connected with an oil-gas mixing injection electromagnetic valve, and the oil-gas mixing injection electromagnetic valve is connected with an oil-gas mixing nozzle;
the installation relationship and the installation process of each part in the air-entraining injection device are as follows:
the oil inlet pipe is connected with the oil nozzle through the oil injection electromagnetic valve; the lower end of the air inlet pipe is connected with the mixing pipe; the mixing pipe is connected with an internal ultrasonic vibrating piece group; the air outlet end of the mixing pipe is connected with an oil-gas mixing injection electromagnetic valve; and an oil-gas mixing nozzle is installed at one end of the oil-gas mixing injection electromagnetic valve.
2. The air entrainment jetting apparatus with coanda oil droplet peeling function according to claim 1, wherein: the ultrasonic vibrating piece group is a ring sleeve-shaped structure consisting of a plurality of circular-arc ultrasonic vibrating pieces and is embedded in the wall of the mixing cavity.
3. The air entrainment jetting apparatus with coanda oil droplet peeling function according to claim 1, wherein: the oil pressure of the oil nozzle is larger than the air pressure of the air inlet pipe.
4. The air entrainment jetting apparatus with coanda oil droplet peeling function according to claim 1, wherein: the oil nozzle and the air inlet pipe are connected with the mixing pipe through threads.
5. The air entrainment jetting apparatus with coanda oil droplet peeling function according to claim 1, wherein: the oil injection electromagnetic valve is connected with the oil inlet pipe and the oil injection nozzle through threads.
6. The air entrainment jetting apparatus with coanda oil droplet peeling function according to claim 1, wherein: the oil-gas mixing injection electromagnetic valve is connected with the mixing pipe and the oil-gas mixing nozzle through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110032440.5A CN112628031A (en) | 2021-01-11 | 2021-01-11 | Air-entraining injection device with wall-attached oil drop stripping function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110032440.5A CN112628031A (en) | 2021-01-11 | 2021-01-11 | Air-entraining injection device with wall-attached oil drop stripping function |
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| Publication Number | Publication Date |
|---|---|
| CN112628031A true CN112628031A (en) | 2021-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110032440.5A Pending CN112628031A (en) | 2021-01-11 | 2021-01-11 | Air-entraining injection device with wall-attached oil drop stripping function |
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| CN (1) | CN112628031A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114941598A (en) * | 2022-05-09 | 2022-08-26 | 潍柴动力股份有限公司 | Atomizing and spraying device of diesel/methanol engine and control method thereof |
-
2021
- 2021-01-11 CN CN202110032440.5A patent/CN112628031A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114941598A (en) * | 2022-05-09 | 2022-08-26 | 潍柴动力股份有限公司 | Atomizing and spraying device of diesel/methanol engine and control method thereof |
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