CN112781072A - Main fuel nozzle atomization structure - Google Patents
Main fuel nozzle atomization structure Download PDFInfo
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- CN112781072A CN112781072A CN202110134630.8A CN202110134630A CN112781072A CN 112781072 A CN112781072 A CN 112781072A CN 202110134630 A CN202110134630 A CN 202110134630A CN 112781072 A CN112781072 A CN 112781072A
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- nozzle
- fuel
- flame tube
- oil
- combustion chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Nozzles For Spraying Of Liquid Fuel (AREA)
Abstract
The invention is suitable for the technical field of engine fuel nozzles, in particular to a main fuel nozzle atomization structure, which comprises a nozzle; the nozzle is connected with a fuel pipeline; the structure also comprises a flame tube nozzle component, wherein the nozzle is inserted into the flame tube nozzle component, and fuel oil enters the flame tube nozzle component through a fuel oil pipeline and the nozzle; the flame tube nozzle assembly is provided with a gas path; the front end of the flame tube nozzle assembly is provided with an oil way, the oil way comprises an expansion type pipe orifice, fuel oil passing through a bent oil way in the flame tube nozzle assembly is mixed with high-pressure gas entering from the gas way to form an atomization space, the high-pressure gas tears the sprayed fuel oil under the action of inertia force to form fine and uniform atomized particles, the stable combustion range is wide, the ignition reliability is high, and the outlet temperature field quality is good; the service life of the combustion chamber is prolonged; the pneumatic atomization structure is adopted, so that the fuel atomization performance is good, the oil and gas are uniformly mixed, and carbon deposit and smoke are reduced.
Description
Technical Field
The invention relates to the technical field of engine fuel nozzles, in particular to an atomization structure of a main fuel nozzle.
Background
The fuel nozzle belongs to the technical field of engines and is equipment consisting of a cavity, an oil valve and a nozzle cap; when the pressure of fuel oil in the oil cavity is higher than a set value, the oil valve is opened, the fuel oil is sprayed out through the nozzle cap, the oil valve consists of a valve body, a valve seat and a spring, the rear end of the valve seat is connected with the cavity to form the oil cavity, the cavity is provided with an inlet channel entering the oil cavity, the spring is located in the oil cavity and acts between the valve body and the valve seat to close the oil valve, the front end of the valve seat is connected with the nozzle cap to form a residual volume, and the nozzle cap is provided with a spray hole connected with the residual volume. The novel structure fuel nozzle is applied to a pulse type fuel pump in an electronic fuel injection system. The jet nozzle has the advantages and progresses of small volume, simple structure, low manufacturing cost and convenience in setting the jet direction.
One of the key components of the engine is a fuel nozzle which has the functions of atomizing fuel, accelerating the formation of mixed gas, ensuring stable combustion and improving the combustion efficiency. The quality of fuel atomization will directly affect the combustion efficiency of the fuel. The poor quality of atomization makes the liquid fog mean diameter large, the ignition is difficult, also can make the exhaust smoke increase; the nonuniform circumferential direction of the fuel oil can cause the nonuniform temperature field of the outlet of the combustion chamber, generate local hot areas and influence the service life of the turbine; the spray cone angle is too small, so that more oil drops are concentrated on the central line of the flame tube to burn, and the center is too rich in oil and easy to smoke; the atomization characteristics of the nozzle have a great influence on the performance and the service life of the combustion chamber,
therefore, the research and development of the main fuel nozzle atomization structure for the aerospace engine with good atomization performance has very important significance. The aircraft engine is a highly complex and precise thermal machine, is used as the heart of an aircraft, is not only the power of the aircraft flight, but also an important driving force for promoting the development of aviation industry, and each important change in human aviation history is inseparable from the technical progress of the aircraft engine.
Aiming at the fuel nozzle atomization structure of an engine and the traditional nozzle atomization structure, the atomization quality is poor, carbon deposit is easy to form, and the fuel is not uniform in the circumferential direction.
Disclosure of Invention
The invention aims to provide an atomization structure of a main fuel nozzle, which aims to solve the problems in the background technology. In order to achieve the purpose, the invention provides the following technical scheme:
a main fuel nozzle atomization structure comprises a nozzle arranged on a combustion chamber casing; the nozzle is connected with a fuel pipeline; the structure also comprises a flame tube nozzle component, wherein the nozzle is inserted into the flame tube nozzle component, and fuel oil enters the flame tube nozzle component through a fuel oil pipeline and the nozzle; the flame tube nozzle assembly is provided with a gas path, and high-pressure gas is supplied by the gas path; the front end of the flame tube nozzle component is provided with an oil path, the oil path comprises an expansion type pipe orifice, fuel oil provided by the pipe orifice and high-pressure gas supplied by the gas path are mixed in the flame tube nozzle component to form an atomization space, and the atomization space enters a combustion chamber of a combustion chamber casing.
In the working process, fuel is supplied to the flame tube nozzle assembly through the fuel pipeline and the nozzle, the fuel passing through the bent oil way in the flame tube nozzle assembly is mixed with high-pressure gas entering the gas way to form an atomization space, the high-pressure gas tears the sprayed fuel under the action of inertia force to form fine and uniform atomized particles, the stable combustion range is wide, the ignition reliability is high, and the quality of an outlet temperature field is good; the conditions of uneven atomization, large liquid drops after atomization or large diameter of atomized particles are avoided, the ignition reliability and the uniformity of the temperature field of the outlet of the combustion chamber are ensured, and the service life of the combustion chamber is prolonged; the pneumatic atomization structure is adopted, so that the fuel atomization performance is good, the oil and gas are uniformly mixed, and carbon deposit and smoke are reduced.
The problem of to engine fuel nozzle atomization structure, traditional nozzle atomization structure, the atomizing quality is poor, form long-pending charcoal, fuel circumference inhomogeneous easily is solved.
In the main fuel nozzle atomizing structure of the invention: the fuel pipeline is detachably connected to the nozzle.
Further scheme: the fuel pipeline is detachably connected to the nozzle through a nut. Further, fuel enters the interior of the liner nozzle assembly through the fuel line and the nozzle.
In the main fuel nozzle atomizing structure of the invention: the nozzle is detachably arranged on the combustion chamber casing.
The nozzle thread is detachably arranged on the combustion chamber casing.
The nozzle is inserted into the fuel connector of the combustion chamber casing and is detachably arranged on the combustion chamber casing by utilizing the fuel connector of the combustion chamber casing.
In the main fuel nozzle atomizing structure of the invention: and the flame tube nozzle assembly is provided with a mixing pipe communicated with an oil way and a gas way, and the mixing pipe is used for mixing fuel oil provided by a pipe orifice and high-pressure gas provided by the gas way to form an atomization space. The high-pressure gas tears the sprayed fuel under the action of inertia force to form fine and uniform atomized particles, and the high-pressure fuel burner has the advantages of wide stable combustion range, high ignition reliability and good outlet temperature field quality; the conditions of uneven atomization, large liquid drops after atomization or large diameter of atomized particles are avoided, the ignition reliability and the uniformity of the outlet temperature field of the combustion chamber are ensured, and the service life of the combustion chamber is prolonged.
Compared with the prior art, the main fuel nozzle atomization structure comprises a nozzle arranged on a combustion chamber casing; the nozzle is connected with a fuel pipeline; the structure also comprises a flame tube nozzle component, wherein the nozzle is inserted into the flame tube nozzle component, and fuel oil enters the flame tube nozzle component through a fuel oil pipeline and the nozzle; the flame tube nozzle assembly is provided with a gas path, and high-pressure gas is supplied by the gas path; the front end of the flame tube nozzle component is provided with an oil way, the oil way comprises an expansion type pipe orifice, fuel oil supplied by the pipe orifice and high-pressure gas supplied by the gas way are mixed in the flame tube nozzle component to form an atomization space, and the atomization space enters a combustion chamber; in the working process, fuel is supplied to the flame tube nozzle assembly through the fuel pipeline and the nozzle, the fuel passing through the bent oil way in the flame tube nozzle assembly is mixed with high-pressure gas entering the gas way to form an atomization space, the high-pressure gas tears the sprayed fuel under the action of inertia force to form fine and uniform atomized particles, the stable combustion range is wide, the ignition reliability is high, and the quality of an outlet temperature field is good; the conditions of uneven atomization, large liquid drops after atomization or large diameter of atomized particles are avoided, the ignition reliability and the uniformity of the temperature field of the outlet of the combustion chamber are ensured, and the service life of the combustion chamber is prolonged; the pneumatic atomization structure is adopted, so that the fuel atomization performance is good, the oil and gas are uniformly mixed, and carbon deposit and smoke are reduced.
Drawings
FIG. 1 is a schematic structural view of a main fuel nozzle atomizing structure of the present invention.
In the figure: 1-a fuel line; 2-a nut; 3-combustor case fuel joint; 4-a nozzle; 5-a liner nozzle assembly.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to specific embodiments. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
The invention aims to provide a main fuel nozzle atomization structure, which aims to solve the problems that the traditional nozzle atomization structure is poor in atomization quality, easy to form carbon deposit and uneven in fuel circumferential direction aiming at the fuel nozzle atomization structure of an engine. In order to achieve the purpose, the invention provides the following technical scheme:
in an embodiment of the present invention, as shown in fig. 1, a main fuel nozzle atomizing structure includes a nozzle 4 installed on a combustion chamber casing; the nozzle 4 is connected with a fuel pipeline 1;
the structure also comprises a flame tube nozzle component 5, wherein the nozzle 4 is inserted into the flame tube nozzle component 5, and fuel oil enters the flame tube nozzle component 5 through the fuel oil pipeline 1 and the nozzle 4; the flame tube nozzle assembly 5 is provided with a gas path, and high-pressure gas is supplied by the gas path; the front end of the flame tube nozzle component 5 is provided with an oil path, the oil path comprises an expansion type pipe orifice, fuel oil provided by the pipe orifice and high-pressure gas supplied by the gas path are mixed in the flame tube nozzle component 5 to form an atomization space, and the atomization space enters a combustion chamber of a combustion chamber casing.
In the embodiment of the invention, in the working process, fuel is provided for the flame tube nozzle assembly 5 through the fuel pipeline 1 and the nozzle 4, the fuel passing through the bent oil circuit in the flame tube nozzle assembly 5 is mixed with high-pressure gas entering the gas circuit to form an atomization space, the high-pressure gas tears the sprayed fuel under the action of inertia force to form fine and uniform atomized particles, the stable combustion range is wide, the ignition reliability is high, and the quality of an outlet temperature field is good; the conditions of uneven atomization, large liquid drops after atomization or large diameter of atomized particles are avoided, the ignition reliability and the uniformity of the temperature field of the outlet of the combustion chamber are ensured, and the service life of the combustion chamber is prolonged; the pneumatic atomization structure is adopted, so that the fuel atomization performance is good, the oil and gas are uniformly mixed, and carbon deposit and smoke are reduced.
In the embodiment of the invention, as shown in fig. 1, the fuel pipeline 1 is detachably connected to the nozzle 4. The fuel pipeline 1 is detachably connected to the nozzle 4 through a nut 2. Further, the fuel enters the interior of the liner nozzle assembly 5 through the fuel line 1 and the nozzle 4.
The nozzle 4 is detachably arranged on the combustion chamber casing. The nozzle 4 is detachably arranged on the combustion chamber casing through threads. The nozzle 4 is inserted into the combustion chamber casing fuel connector 3 and detachably mounted on the combustion chamber casing by using the combustion chamber casing fuel connector 3.
The nozzle 4 may be detachably mounted on the combustion chamber casing through a fixing pin, or detachably mounted on the combustion chamber casing through a buckle, or the like, except for being detachably mounted on the combustion chamber casing through a screw thread.
In the embodiment of the invention, as shown in fig. 1, a mixing pipe for communicating an oil path and a gas path is arranged on the flame tube nozzle assembly 5, and is used for mixing fuel oil supplied by a pipe orifice and high-pressure gas supplied by the gas path to form an atomization space. The high-pressure gas tears the sprayed fuel under the action of inertia force to form fine and uniform atomized particles, and the high-pressure fuel burner has the advantages of wide stable combustion range, high ignition reliability and good outlet temperature field quality; the conditions of uneven atomization, large liquid drops after atomization or large diameter of atomized particles are avoided, the ignition reliability and the uniformity of the outlet temperature field of the combustion chamber are ensured, and the service life of the combustion chamber is prolonged.
Compared with the prior art, the main fuel nozzle atomization structure comprises a nozzle 4 arranged on a combustion chamber casing; the nozzle 4 is connected with a fuel pipeline 1; the structure also comprises a flame tube nozzle component 5, wherein the nozzle 4 is inserted into the flame tube nozzle component 5, and fuel oil enters the flame tube nozzle component 5 through the fuel oil pipeline 1 and the nozzle 4; the flame tube nozzle assembly 5 is provided with a gas path, and high-pressure gas is supplied by the gas path; the front end of the flame tube nozzle component 5 is provided with an oil path, the oil path comprises an expansion type pipe orifice, fuel oil supplied by the pipe orifice and high-pressure gas supplied by the gas path are mixed in the flame tube nozzle component 5 to form an atomization space, and the atomization space enters a combustion chamber; in the working process, fuel is provided for the flame tube nozzle assembly 5 through the fuel pipeline 1 and the nozzle 4, the fuel passing through a bent oil way in the flame tube nozzle assembly 5 is mixed with high-pressure gas entering a gas way to form an atomization space, the high-pressure gas tears the sprayed fuel under the action of inertia force to form fine and uniform atomized particles, the stable combustion range is wide, the ignition reliability is high, and the outlet temperature field quality is good; the conditions of uneven atomization, large liquid drops after atomization or large diameter of atomized particles are avoided, the ignition reliability and the uniformity of the temperature field of the outlet of the combustion chamber are ensured, and the service life of the combustion chamber is prolonged; the pneumatic atomization structure is adopted, so that the fuel atomization performance is good, the oil and gas are uniformly mixed, and carbon deposit and smoke are reduced.
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.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (7)
1. A main fuel nozzle atomization structure is characterized in that,
comprises a nozzle mounted on a combustion chamber casing;
the nozzle is connected with a fuel pipeline;
the structure also comprises a flame tube nozzle component, wherein the nozzle is inserted into the flame tube nozzle component, and fuel oil enters the flame tube nozzle component through a fuel oil pipeline and the nozzle;
the flame tube nozzle assembly is provided with a gas path, and high-pressure gas is supplied by the gas path; the front end of the flame tube nozzle component is provided with an oil path, the oil path comprises an expansion type pipe orifice, fuel oil provided by the pipe orifice and high-pressure gas supplied by the gas path are mixed in the flame tube nozzle component to form an atomization space, and the atomization space enters a combustion chamber of a combustion chamber casing.
2. A primary fuel nozzle atomizing structure as set forth in claim 1, wherein said fuel line is removably connected to the nozzle.
3. A primary fuel nozzle atomizing structure as set forth in claim 2, wherein said fuel line is removably connected to the nozzle by a nut.
4. A main fuel nozzle atomizing structure in accordance with claim 1, wherein said nozzle is detachably mounted to the combustion chamber housing.
5. A main fuel nozzle atomizing structure according to claim 4, wherein said nozzle is screw-detachably mounted to the combustion chamber casing.
6. The primary fuel nozzle atomizing structure of claim 5, wherein said nozzle is removably mounted to the combustion chamber housing by being inserted through and threadably engaged with the combustion chamber housing fuel nipple.
7. The main fuel nozzle atomizing structure according to any one of claims 1 to 6, wherein a mixing pipe communicating an oil passage and an air passage is provided on the liner nozzle assembly for mixing the fuel supplied from the nozzle and the high-pressure gas supplied from the air passage to form an atomizing space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110134630.8A CN112781072A (en) | 2021-01-29 | 2021-01-29 | Main fuel nozzle atomization structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110134630.8A CN112781072A (en) | 2021-01-29 | 2021-01-29 | Main fuel nozzle atomization structure |
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| Publication Number | Publication Date |
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| CN112781072A true CN112781072A (en) | 2021-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110134630.8A Pending CN112781072A (en) | 2021-01-29 | 2021-01-29 | Main fuel nozzle atomization structure |
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| CN (1) | CN112781072A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151200A (en) * | 2021-10-20 | 2022-03-08 | 中国航发四川燃气涡轮研究院 | Igniter |
-
2021
- 2021-01-29 CN CN202110134630.8A patent/CN112781072A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151200A (en) * | 2021-10-20 | 2022-03-08 | 中国航发四川燃气涡轮研究院 | Igniter |
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