CN114992669A - Fuel nozzle with regulating valve and fuel supply mode - Google Patents
Fuel nozzle with regulating valve and fuel supply mode Download PDFInfo
- Publication number
- CN114992669A CN114992669A CN202210519109.0A CN202210519109A CN114992669A CN 114992669 A CN114992669 A CN 114992669A CN 202210519109 A CN202210519109 A CN 202210519109A CN 114992669 A CN114992669 A CN 114992669A
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- oil
- valve plunger
- plunger
- nozzle
- valve
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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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- 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
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention provides a fuel nozzle with an adjusting valve, which comprises a nozzle shell, wherein the nozzle shell is hollow and is provided with a main oil way and an auxiliary oil way, a valve plunger is arranged at the inlet side of the auxiliary oil way, an ejector pin for limiting is arranged at one side of the inlet of the auxiliary oil way of the valve plunger, a spring for limiting is arranged at one side of the inlet of the main oil way, and the outlet of the valve plunger is arranged at an oil inlet pipe of the auxiliary oil way and is used for adjusting the flow of fuel oil entering the oil inlet pipe of the auxiliary oil way. The fuel nozzle is reasonably designed through the arrangement of the auxiliary oil way valve and the oil supply modes of the main oil way and the auxiliary oil way, so that the requirement that the area of an effective oil outlet of a plunger is large and the oil supply quantity of the auxiliary oil way of the ignition nozzle is large is met when the engine is in an ignition state, and meanwhile, when the engine works in a small state or a large state, the area of the effective oil outlet of the plunger is small, the oil supply quantity of the ignition nozzle and the auxiliary oil way of a common nozzle is equal, and the requirement on uniformity of the flow quantity of fuel at the head part of a combustion chamber is met.
Description
Technical Field
The invention belongs to the field of aircraft engines, and particularly relates to a fuel nozzle with an adjusting valve and a fuel supply mode.
Background
Fuel injectors are key components of aircraft engines and play a very important role in engine performance. The fuel nozzle has the functions of atomizing (or vaporizing) fuel, accelerating the formation of mixed gas, ensuring stable combustion and improving combustion efficiency.
With the continuous development of aviation technology, the requirements of engines on the ignition boundary and the uniformity of the temperature field of a combustion chamber are continuously improved. In order to widen the ignition boundary of the combustion chamber, a common scheme at present is to arrange an ignition nozzle at a position opposite to an electric nozzle. Compared with other common nozzles, the ignition nozzle has larger fuel flow of the auxiliary oil path under the same fuel supply pressure, and an oil rich area can be formed near the electric nozzle, thereby being beneficial to ignition of a combustion chamber. However, as the engine state increases, under the same fuel supply pressure, the flow of the auxiliary oil path of the ignition nozzle is obviously larger than that of a common nozzle, so that fuel oil at the head part of the combustion chamber is unevenly distributed, the radial temperature field of the combustion chamber is unevenly distributed, and the performance of the combustion chamber and a turbine behind the combustion chamber are adversely affected.
Therefore, it is desirable to provide a fuel nozzle with adjustable flow ratio of the secondary oil path to widen the ignition margin of the combustion chamber and further improve the uniformity of the flow distribution of the fuel at the head of the combustion chamber.
Disclosure of Invention
The invention aims to provide a fuel nozzle with an adjusting valve and a fuel supply mode.
In order to realize the purpose, the invention provides the following technical scheme:
a fuel nozzle with an adjusting valve comprises a nozzle shell, wherein the nozzle shell is hollow and is provided with a main oil way and an auxiliary oil way, a valve plunger is arranged at the inlet side of the auxiliary oil way, an ejector pin for limiting is arranged at one side of the inlet of the auxiliary oil way of the valve plunger, a spring for limiting is arranged at one side of the inlet of the main oil way,
and the outlet of the valve plunger is arranged on the auxiliary oil path oil inlet pipe and is used for adjusting the fuel flow entering the auxiliary oil path oil inlet pipe.
The fuel nozzle with the regulating valve provided by the invention also has the following technical characteristics,
during ignition, the oil supply pressure P31 of the auxiliary oil way is more than or equal to the opening pressure P1 of the valve plunger;
after ignition is successful, when the main oil way is opened, the oil supply pressure P32 of the auxiliary oil way is more than or equal to the valve plunger stagnation pressure P2;
after the main oil way is opened, the difference value between the oil supply pressure P3 of the auxiliary oil way and the main oil way pressure P4 is more than or equal to the valve plunger stagnation pressure P2.
The fuel nozzle with the adjusting valve is also technically characterized in that the effective oil outlet area S1 of the valve plunger before opening is smaller than the total oil outlet area S of the valve plunger;
after the valve plunger is opened until the valve plunger is stopped, the effective oil outlet area S2 of the valve plunger is equal to the total oil outlet area S of the valve plunger;
the effective oil outlet area S3 of the valve plunger after stagnation is smaller than the total oil outlet area S of the valve plunger.
The fuel nozzle with the adjusting valve is also technically characterized in that the pressure area A of the valve plunger, the maximum valve adjusting distance is Lm, and the spring stiffness K is that P2A is more than or equal to K Lm.
The fuel nozzle with the adjusting valve is also technically characterized in that the length h of the outlet of the plunger of the valve is smaller than the diameter D of the oil pipe of the auxiliary oil way.
The fuel nozzle with the adjusting valve is also technically characterized in that the valve adjusting distance of the valve plunger is not smaller than the minimum length of the spring.
The fuel nozzle with the adjusting valve is also technically characterized in that the cross section of the valve plunger is in the shape of a special arch, and one side of the valve plunger, which is communicated with an oil pipe of an auxiliary oil way, is limited by a rectangle and is used for preventing rotation failure during working; the oil outlet of the valve plunger is rectangular.
The fuel nozzle with the adjusting valve is also technically characterized in that the area of an oil outlet of the valve plunger is larger than that of the auxiliary nozzle.
The fuel nozzle with the adjusting valve is also technically characterized in that the thimble is limited by the retainer ring, and the spring is fixed between the oil inlet of the main oil way and the oil inlet of the auxiliary oil way through the spring base.
Another object of the present invention is to provide a fuel supply method using the fuel nozzle with the regulating shutter as described in any one of the above.
Advantageous effects
The fuel nozzle with the adjusting valve provided by the invention has the advantages that through the reasonable design of the auxiliary oil way valve and the oil supply modes of the main oil way and the auxiliary oil way, the requirements that the effective oil outlet area of the plunger is larger and the oil supply amount of the auxiliary oil way of the ignition nozzle is larger when the engine is in an ignition state are met, meanwhile, when the engine works in a small state or a large state, the effective oil outlet area of the plunger is smaller, the oil supply amount of the ignition nozzle is equal to that of the auxiliary oil way of a common nozzle, and the requirement on the uniformity of the head fuel oil flow of a combustion chamber is met.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiment or the prior art will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural view of a fuel injector provided in accordance with an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of the shutter plunger of FIG. 1;
FIG. 3 is a perspective view of valve plunger A of FIG. 2;
FIG. 4 is a perspective view of the shutter plunger of FIG. 2 in the direction of B;
FIG. 5 is a schematic view of an effective oil outlet when the valve plunger is in operation;
wherein the content of the first and second substances,
1: a collar; 2: a thimble; 3: a valve plunger; 5: a spring; 6: a spring mount; 7: a nozzle housing; 11: an auxiliary oil path inlet; 12: a main oil path inlet; 13: a main oil line oil pipe; 14: a main nozzle; 15: a secondary spout; 16: an auxiliary oil path oil pipe; 17: the valve adjusts the interval L; 18: the diameter D of the oil pipe of the auxiliary oil way; 19: the length h of the valve plunger outlet; 31: a plunger oil inlet; 32: a plunger oil outlet; 33: a plunger piston limit ring; 34: an effective oil outlet of the plunger; 35: plunger bearing surface a.
Detailed Description
The present invention is further described in detail with reference to the drawings and examples, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that the functional, methodological, or structural equivalents of these embodiments or substitutions may be included in the scope of the present invention.
In the description of the embodiments of the present invention, it should be understood that the terms "central", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only used for convenience in describing and simplifying the description of the present invention, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; 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 creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
As shown in fig. 1-5, the present embodiment provides a fuel nozzle with an adjusting valve, the fuel nozzle includes a nozzle housing 7, the nozzle housing 7 is hollow, and is provided with a main oil path and an auxiliary oil path, a valve plunger 3 is arranged at the side of an inlet 11 of the auxiliary oil path, an ejector pin 2 for limiting is arranged at one side of the inlet 11 of the valve plunger auxiliary oil path, a spring 5 for limiting is arranged at one side of an inlet 12 of the main oil path,
wherein, the outlet of the valve plunger 3 is arranged on the auxiliary oil path oil inlet pipe 16 and is used for adjusting the fuel flow entering the auxiliary oil path oil inlet pipe 16. And the valve plunger 3 is limited at the side of the auxiliary oil way inlet 11 through the ejector pin 2, so that the valve plunger 3 is prevented from sliding.
In some embodiments, the oil supply pressure P31 of the secondary oil way is more than or equal to the opening pressure P1 of the valve plunger during ignition;
after ignition is successful, when the main oil way is opened, the oil supply pressure P32 of the auxiliary oil way is more than or equal to the valve plunger stagnation pressure P2;
after the main oil way is opened, the difference value between the oil supply pressure P3 of the auxiliary oil way and the main oil way pressure P4 is more than or equal to the valve plunger stagnation pressure P2.
In some embodiments, the effective oil outlet area S1 before the valve plunger 3 is opened is less than the total oil outlet area S of the valve plunger;
after the valve plunger 3 is opened until stagnation, the effective oil outlet area S2 of the valve plunger 3 is equal to the total oil outlet area S of the valve plunger 3;
the effective oil outlet area S3 of the valve plunger 3 after stagnation is smaller than the total oil outlet area S of the valve plunger.
In some embodiments, the maximum distance of the valve adjustment is Lm and the spring stiffness K is P2A ≧ K Lm when the pressure area A of the valve plunger 3 is pressed.
In some embodiments, the flapper plunger outlet length h19 is less than the secondary oil line diameter D18.
In some embodiments, the shutter adjustment distance L17 of the shutter plunger is not less than the minimum length of the spring.
In some embodiments, as shown in fig. 2-4, the valve plunger 3 includes a plunger oil inlet 31, a plunger oil outlet 32, a plunger limit ring 33, and a plunger pressure bearing face a 35. The plunger oil inlet 31 is communicated with the auxiliary oil path inlet 11, and the plunger oil outlet 32 is communicated with the auxiliary oil path oil pipe 16.
In some embodiments, the section of the valve plunger 3 is in a special arch shape, and one side of the valve plunger, which is communicated with the auxiliary oil line oil pipe 16, is limited by a rectangle to prevent rotation failure during working; the plunger oil outlet 31 of the valve plunger is rectangular.
In some embodiments, the area of the plunger oil outlet 31 of the valve plunger 3 is larger than the area of the secondary nozzle.
In some embodiments, the thimble 2 is limited by a collar 1, and the spring 5 is fixed between the main oil passage oil inlet 12 and the auxiliary oil passage oil inlet 11 by a spring base 6. The plunger piston limit ring 33 assists the spring base 6 to limit the spring 5 for preventing the eccentric clamping stagnation of the spring 5.
In some embodiments, a fuel supply is provided using a fuel nozzle with an adjustment flap as described in any one of the preceding claims. Fuel oil respectively enters the nozzle from the auxiliary oil path inlet 11 and the main oil path inlet 12 to fill the spaces on both sides of the valve plunger 3. The fuel oil of the auxiliary oil way flows through the clamping ring 1, the thimble 2 and the valve plunger 3 and then enters the oil pipe 16 of the auxiliary oil way, and is sprayed out from the auxiliary nozzle 15. The main line fuel flows through the main line oil pipe 13 and is ejected from the main nozzle 14. In the actual working process of the valve plunger 3, the plunger oil outlet 32 is partially shielded by the nozzle shell 7, and the actual effective channel through which the fuel oil enters the auxiliary oil way oil pipe 16 through the valve plunger 3 is the plunger effective oil outlet 34.
The working flow of the fuel nozzle provided by the embodiment is as follows:
the valve plunger 3 adjusts the displacement of the valve plunger 3 through the pressure difference between an auxiliary oil path inlet 11 and a main oil path inlet 12 communicated with the valve plunger 3 and the elastic force of a spring 5, and the fuel flow of an auxiliary nozzle 15 is adjusted by changing the area of an effective oil outlet 34 of the plunger. When the engine is ignited, the auxiliary oil way starts to supply oil, the oil supply pressure reaches P31, the valve plunger 3 generates certain displacement under the action of the auxiliary oil way pressure and the spring 5, the area of the plunger effective oil outlet 34 is kept in a large opening state and is larger than the area of the auxiliary nozzle 15, fuel oil is throttled at the auxiliary nozzle 15 of the nozzle, and the auxiliary nozzle 15 is in a large flow state, so that the ignition requirement of the combustion chamber is ensured. Along with the small-state work of an engine, before a main oil way is opened, the oil supply pressure of an auxiliary oil way is gradually increased, when the oil supply pressure reaches P32, the valve adjusting distance 17 reaches the minimum, a valve plunger 3 is in contact with a spring base 6, the area of an effective oil outlet 34 of the plunger is kept in a small opening state, at the moment, the area of the effective oil outlet 34 of the plunger is smaller than that of an auxiliary nozzle 15, fuel oil is throttled at the valve plunger 3, and the auxiliary nozzle 15 works in a small flow state; with the further increase of the engine state, the main oil way is opened, the oil supply pressure difference of the auxiliary oil way and the main oil way is not less than P2, the valve adjusting distance 17 is kept at the minimum state, the valve plunger 3 is in contact with the spring base 6, the area of the plunger effective oil outlet 34 is kept at a small opening state, the fuel oil is throttled at the valve plunger 3, and the auxiliary nozzle 15 is kept at a small flow rate state to work.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention. The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various improvements and modifications without departing from the technical principle of the present invention, and those improvements and modifications should be also considered as the protection scope of the present invention.
Claims (10)
1. A fuel nozzle with an adjusting valve comprises a nozzle shell, wherein the nozzle shell is hollow and is provided with a main oil way and an auxiliary oil way, and the fuel nozzle is characterized in that a valve plunger is arranged at the inlet side of the auxiliary oil way, one side of the inlet of the auxiliary oil way of the valve plunger is provided with a thimble for limiting, one side of the inlet of the main oil way is provided with a spring for limiting,
and the outlet of the valve plunger is arranged on the auxiliary oil path oil inlet pipe and is used for adjusting the fuel flow entering the auxiliary oil path oil inlet pipe.
2. Fuel injector with regulating flap according to claim 1,
during ignition, the oil supply pressure P31 of the auxiliary oil way is more than or equal to the opening pressure P1 of the valve plunger;
after ignition is successful, when the main oil way is opened, the oil supply pressure P32 of the auxiliary oil way is more than or equal to the valve plunger stagnation pressure P2;
after the main oil way is opened, the difference value between the oil supply pressure P3 of the auxiliary oil way and the main oil way pressure P4 is more than or equal to the valve plunger stagnation pressure P2.
3. The fuel nozzle with the regulating valve as claimed in claim 1, wherein the effective outlet area S1 before the valve plunger is opened is less than the total outlet area S of the valve plunger;
after the valve plunger is opened until the valve plunger is stopped, the effective oil outlet area S2 of the valve plunger is equal to the total oil outlet area S of the valve plunger;
the effective oil outlet area S3 of the valve plunger after stagnation is smaller than the total oil outlet area S of the valve plunger.
4. A fuel nozzle with an adjustable flapper as claimed in claim 2, wherein the maximum flapper spacing is Lm for the area A of the flapper plunger under pressure, and the spring rate is K, P2A ≧ K Lm.
5. A fuel injector with an adjustment flap according to claim 1, characterized in that the flap plunger outlet length h is smaller than the secondary oil line diameter D.
6. A fuel injector with an adjustment flap according to claim 1, characterized in that the flap adjustment pitch of the flap plunger is not less than the minimum length of the spring.
7. A fuel nozzle with an adjusting valve as claimed in claim 1, wherein the cross-sectional shape of the valve plunger is a special-shaped arch, and one side of the valve plunger, which is communicated with the auxiliary oil line, is limited by a rectangle to prevent rotation failure during operation; the oil outlet of the valve plunger is rectangular.
8. A fuel injector with regulating shutter according to claim 1, characterized in that the area of the outlet of the shutter plunger is larger than the area of the secondary nozzle opening.
9. A fuel injector with an adjustment flap as set forth in claim 1, characterized in that said needle is retained by a retainer ring, and said spring is secured between said primary and secondary fuel inlet passages by a spring mount.
10. An oil supply method using a fuel nozzle with an adjustment flap according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210519109.0A CN114992669B (en) | 2022-05-12 | 2022-05-12 | Fuel nozzle with adjusting valve and fuel supply mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210519109.0A CN114992669B (en) | 2022-05-12 | 2022-05-12 | Fuel nozzle with adjusting valve and fuel supply mode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114992669A true CN114992669A (en) | 2022-09-02 |
| CN114992669B CN114992669B (en) | 2023-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210519109.0A Active CN114992669B (en) | 2022-05-12 | 2022-05-12 | Fuel nozzle with adjusting valve and fuel supply mode |
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| CN (1) | CN114992669B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117738797A (en) * | 2024-02-21 | 2024-03-22 | 中国航发四川燃气涡轮研究院 | Main oil way valve |
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| CN108087124A (en) * | 2017-12-20 | 2018-05-29 | 中国航发长春控制科技有限公司 | A kind of indirect oil-return type differential pressure valve of negative feedback control |
| CN109237515A (en) * | 2018-07-16 | 2019-01-18 | 北京航空航天大学 | A kind of low emission combustor head with oil circuit automatic adjustment valve arrangement |
| CN111022191A (en) * | 2019-11-22 | 2020-04-17 | 中国航发西安动力控制科技有限公司 | Piston device with speed response mechanism |
| CN111055051A (en) * | 2019-12-27 | 2020-04-24 | 成立航空技术有限公司 | Device and method for debugging flow of multi-nozzle welding assembly |
| CN112460636A (en) * | 2020-10-27 | 2021-03-09 | 中国船舶重工集团公司第七0三研究所 | Double-oil-way single-nozzle double-fuel nozzle |
| CN114087627A (en) * | 2021-11-11 | 2022-02-25 | 中国航发贵州黎阳航空动力有限公司 | Miniature aircraft engine fuel manifold nozzle and oil mixing test method thereof |
| CN114109611A (en) * | 2021-11-05 | 2022-03-01 | 中国航发西安动力控制科技有限公司 | Piston type oil distribution valve assembly with double-spring structure |
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2022
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8763362B1 (en) * | 2008-10-03 | 2014-07-01 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Injector element which maintains a constant mean spray angle and optimum pressure drop during throttling by varying the geometry of tangential inlets |
| CN203532122U (en) * | 2013-08-13 | 2014-04-09 | 中国航空动力机械研究所 | Fuel oil distributor |
| CN107076420A (en) * | 2014-08-14 | 2017-08-18 | 西门子公司 | Multifunctional fuel nozzle with heat shield |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117738797A (en) * | 2024-02-21 | 2024-03-22 | 中国航发四川燃气涡轮研究院 | Main oil way valve |
| CN117738797B (en) * | 2024-02-21 | 2024-04-16 | 中国航发四川燃气涡轮研究院 | Main oil way valve |
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| Publication number | Publication date |
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| CN114992669B (en) | 2023-09-05 |
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