CN112254170B - Improved sealing structure of auxiliary oil way fuel nozzle valve - Google Patents
Improved sealing structure of auxiliary oil way fuel nozzle valve Download PDFInfo
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- CN112254170B CN112254170B CN202011125880.7A CN202011125880A CN112254170B CN 112254170 B CN112254170 B CN 112254170B CN 202011125880 A CN202011125880 A CN 202011125880A CN 112254170 B CN112254170 B CN 112254170B
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- fuel
- opening door
- nozzle
- door liner
- plunger
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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
- F23R3/283—Attaching or cooling of fuel injecting means including supports for fuel injectors, stems, or lances
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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 application provides a modified vice oil circuit fuel nozzle valve seal structure, it includes: an oil supply nipple; a secondary nozzle interface; the shell is arranged between the oil supply connector and the auxiliary nozzle connector, and a containing cavity is formed in the shell; the opening door lining is fixed in the containing cavity and is provided with a plurality of oil leakage holes communicated with the oil supply connector and the auxiliary nozzle interface; a plunger which passes through the opening door liner and can move relatively, and the plunger is supported on the opening door liner through an opening spring; the oil filter is arranged on one side of the opening door liner opposite to the fuel inlet and covers the oil leakage hole; the opening door liner is provided with a bulge pointing to the plunger piston, the plunger piston is provided with a groove matched with the bulge and a conical sealing surface, soft sealing medium is arranged in the groove, and the opening door liner is provided with a conical chamfer matched with the conical sealing surface; when the fuel flowing from the fuel supply nozzle does not reach a predetermined pressure, the protrusion contacts the soft sealing medium, so that the fuel can be stored on the fuel supply nozzle side of the opening door liner.
Description
Technical Field
The application belongs to the technical field of aircraft engines, and particularly relates to an improved sealing structure of an auxiliary oil way fuel nozzle valve.
Background
Fuel injectors are key components of aircraft engine combustion chambers and play an important role in engine performance.
Referring to fig. 1 and 2, a schematic diagram of a nozzle structure of a secondary fuel line fuel nozzle in the prior art is shown, where the nozzle structure 10 includes a fuel supply nipple 11, a housing 12, a valve 13, a fuel filter 14, a compression spring 15, a gasket 16, a secondary nozzle port 17, and a sealing ring 18. The shutter 13 includes an opening door liner 131, a plunger 132, a stop collar 133, an opening spring 134, and a collar 135. The sub-nozzle port 17 includes a tapered nipple 171 and a circumscribing nut 172. The fuel leakage is prevented by the oil supply connector 11 and the shell 12 through the sealing gasket 16, the lower end face of the oil supply connector 11 is in contact with and tightly pressed by the compression spring 15, the compression spring 15 is sleeved on the oil filter 14, the oil filter 14 is placed on the opening door liner 131, and the opening door liner 131, the opening door spring 134, the limiting sleeve 133, the clamping ring 135 and the sealing ring 18 are sequentially arranged outside the plunger 132. The opening door liner 131 is provided with a plurality of oil leakage holes which are uniformly distributed along the circumferential direction, the lower end face of the opening door liner is in contact with the shell 12, the bottom of the inner cylindrical surface of the opening door liner is provided with a smooth chamfer, the chamfer is tightly attached to the plunger 132, the lower end face of the shell 12 and the auxiliary nozzle interface 17 are welded into a whole, and the external nut 172 is connected with the auxiliary nozzle.
When the nozzle works, fuel oil is filtered through the oil filter 14 through the oil supply connector 11, pressure is applied to the plunger 132 after oil leakage holes in the door liner 131 are opened, the plunger 132 moves downwards, when oil supply pressure is increased, the moving distance of the plunger 132 is increased, the valve 13 is opened after the plunger 132 moves to a certain distance, and the fuel oil flows out through a conical surface gap formed by the plunger 132 and the opened door liner 131 and finally enters the auxiliary nozzle to be sprayed out in a better atomization mode. When the test is over, the plunger 132 returns to the initial position and comes into close contact again with the opening gasket 131, sealing the fuel upstream of the shutter.
However, the prior art nozzles suffer from the following disadvantages:
1) the machining precision required at the sealing conical surfaces of the opening door liner and the plunger is higher, so that the process difficulty, the production period and the production cost are increased;
2) the opening door liner and the plunger are sealed through a tiny conical surface, when the opening door liner and the plunger are not coaxial or the machining precision cannot be guaranteed, or after the plunger reciprocates for multiple times, the conical surface is poor in adhesion, oil leakage is easy to occur, and the working reliability of an engine is affected.
Disclosure of Invention
It is an object of the present application to provide an improved secondary fuel line fuel nozzle flap seal arrangement to address or mitigate at least one of the problems of the background art.
The technical scheme of the application is as follows: an improved secondary fuel line fuel injector valve seal structure, said valve seal structure comprising:
an oil supply nipple;
a secondary nozzle interface;
the shell is arranged between the oil supply connector and the auxiliary nozzle connector, and a containing cavity is formed in the shell;
the opening door lining is fixedly arranged in the containing cavity, and a plurality of oil leakage holes communicated with the oil supply connector and the auxiliary nozzle connector are formed in the opening door lining;
a plunger penetrating the opening door liner and movable relative to the opening door liner, the plunger being supported on the opening door liner by an opening spring; and
the oil filter is arranged on one side, opposite to a fuel inlet, of the opening door liner, covers the oil leakage hole and is used for filtering fuel entering from the fuel supply connector;
the opening door liner is provided with a protrusion pointing to the plunger, the plunger is provided with a groove and a conical sealing surface, the groove is matched with the protrusion, soft sealing media are arranged in the groove, the opening door liner is provided with a conical chamfer matched with the conical sealing surface, when fuel flowing in from the fuel supply connector reaches a preset pressure, the fuel pushes the plunger to move through the oil leakage hole and flows out from the auxiliary nozzle connector, and when the fuel flowing in from the fuel supply connector does not reach the preset pressure, the protrusion is in contact with the soft sealing media, so that the fuel can be stored on one side of the fuel supply connector of the opening door liner.
In the present application, the housing is detachably connected to the oil supply nipple; the shell is fixedly connected with the auxiliary nozzle interface.
In this application, the secondary nozzle interface includes external nut and the toper nipple that is used for being connected with secondary nozzle, external nut, toper nipple and casing fixed connection become one.
In this application, the casing with be equipped with sealed the pad between the fuel feeding connector, be used for realizing the casing with sealed between the fuel feeding connector.
In this application, the oil is strained and is passed through pressure spring spacing between fuel feeding nipple and opening the door liner.
In this application, the stop collar is installed through the rand to the tip of plunger, open the spring and set up between stop collar and opening the door lining.
In this application, a plurality of oil leak holes are evenly distributed with the axis circumference of opening the door liner.
In the present application, the soft sealing medium is rubber.
The application provides an improved secondary oil circuit fuel nozzle valve seal structure comprises two structures of hard seal and soft seal that spare part and soft seal structure formed by the contact of spare part structure, and when soft seal department takes place to damage, the contact of hard seal face department has played duplicate protection effect.
Drawings
In order to more clearly illustrate the technical solutions provided by the present application, the following briefly introduces the accompanying drawings. It is to be expressly understood that the drawings described below are only illustrative of some embodiments of the invention.
Fig. 1 is a schematic diagram of a structure of a secondary fuel nozzle valve in the prior art.
Fig. 2 is an enlarged schematic view of a shutter structure in the prior art.
Fig. 3 is a schematic structural diagram of the secondary fuel line fuel nozzle valve of the present application.
Fig. 4 is an enlarged schematic view of a shutter sealing structure in the present application.
Reference numerals:
20-valve sealing structure
21-oil supply connector
22-shell
23-valve
231-opening door lining
232-plunger
233-limiting sleeve
234-opening spring
235-collar
236 soft sealing medium
237-projection
238-taper chamfer
24-oil filter
25-pressure spring
26-gasket
27-sub nozzle interface
271-conical nozzle
272-external screw cap
28-sealing ring
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application.
In order to overcome the shortcomings in the prior art, the application provides an auxiliary oil way fuel nozzle valve structure.
As shown in fig. 3 and 4, the present application provides a secondary fuel line nozzle shutter seal structure 20 including: a fuel feed nipple 21 for connection to a fuel feed line, a sub-nozzle connection 27 for connection to a sub-nozzle, and a housing 22 provided between the fuel feed nipple 21 and the sub-nozzle connection 27. The shell 22 is of a hollow structure, a cavity is formed in the shell, an opening door liner 231 is fixedly arranged in the cavity, a plurality of oil leakage holes are formed in the opening door liner 231, and fuel oil can flow from the upstream of the opening door liner 231 to the downstream of the opening door liner 231 through the oil leakage holes. The middle part of the opening door lining 231 is provided with a through hole, a plunger 232 is arranged in the through hole, and the plunger 232 and the opening door lining 231 can slide. An opening door spring 234 is provided between the opening door liner 231 and the plunger 232, and the opening door spring 234 can provide the spring force required for resetting the plunger 232. The opening door liner 231 is provided with a projection 237 pointing to the plunger 232, the plunger 232 is provided with a groove adapted to the projection 237 and a conical sealing surface, the groove is provided with a soft sealing medium 236, and the opening door liner 231 is provided with a conical chamfer 238 adapted to the conical sealing surface.
When the plunger 232 is at the initial position, the protrusion 237 on the opening door liner 231 contacts with the soft sealing medium 236, and the conical sealing surface of the plunger 232 is approximately attached to the conical chamfer at the corresponding position of the opening door liner 231 (or because the soft sealing medium 236 is thicker and not closely attached), at this time, the sealing of the upstream part of the opening door liner 231 can be realized; when the pressure of the fuel flowing from the fuel supply nipple 21 continues to increase, the plunger 232 is pushed by the fuel flowing in through the oil leak hole, so that a gap is formed between the protrusion 237 and the tapered chamfer 238 of the opening gate bushing 231 and the soft sealing medium 236 and the tapered sealing surface of the plunger 232, respectively, and the fuel can flow out of the gap to the sub-nozzle port.
In an embodiment of the present application, the housing 22 and the oil supply nozzle 21 are detachably connected to facilitate the installation of the components in the housing 22. The detachable connection may be achieved by providing an external thread on the housing 22 and an internal thread on the oil supply nozzle 21, for example, by screwing. The housing 22 and the auxiliary oil nozzle interface may be fixedly connected, for example, the housing 22 and the auxiliary oil nozzle interface may be welded and fixed by welding.
Further, the secondary oil nozzle interface 27 may further include an external nut 272 and a tapered adapter 271, and the connection between the valve sealing structure 20 and the secondary oil nozzle (not shown) is achieved through the external nut 272 and the tapered adapter 271. Wherein, the external nut 272 and the tapered nozzle 271 can be fixed integrally with the housing 22 by welding.
In one embodiment of the present application, the fuel nozzle 21 and the housing 22 are provided with a gasket 26 to prevent fuel leakage between the fuel nozzle 21 and the housing 22.
The oil filter 24 is placed on the opening door liner 231, the oil filter 24 is used for realizing fuel oil filtration, in order to fix the oil filter 24, in an embodiment of the present application, a compression spring 25 may be sleeved on the oil filter 24, the upper side of the compression spring 25 is compressed by the lower end face of the oil supply nozzle 21, and the lower side of the compression spring 25 contacts and presses the oil filter 24.
In order to realize the limit control of the plunger 232, a groove is formed in the upper end of the plunger 232, a clamping ring 235 is arranged in the groove, a limit sleeve 233 is arranged in the clamping ring 235, an opening door spring 234 is arranged between the limit sleeve 233 and the opening door liner 231, and the plunger 232 can realize the movement reset along the axial direction thereof under the action of the opening door spring 234.
In this application, a step is provided in the housing 22, and the opening door liner 231 is mounted on the step and is pressed by the compression spring 25 pressing the oil filter 24, thereby achieving fixation in the housing 22. In addition, a sealing ring 113 is arranged between the opening door liner 231 and the shell 22, so that the upstream and downstream of the opening door liner 231 are sealed.
In an embodiment of the present application, a plurality of oil leakage holes are uniformly distributed along a circumferential direction of the opening liner 231.
In the present application, the lower end of the plunger 232 is set to be a tapered sealing surface, and the corresponding position of the housing 22 is set to be a smooth chamfer, so that tight sealing is realized by the tight fit of the chamfer and the tapered sealing surface.
The working principle of the application is as follows: when the nozzle is operated, fuel flows in from the fuel supply nipple 21, is filtered by the oil filter 24, and then passes through the oil leakage hole formed in the gate bush 231 to apply pressure to the plunger 232. When the pressure reaches a certain level, the plunger 232 moves downwards, the oil supply pressure is increased, the moving distance of the plunger 232 is increased, after the plunger 232 moves to a certain distance, the valve structure is opened, the fuel oil flows out through a conical surface gap formed between the plunger 232 and the opening door liner 231, finally enters the auxiliary nozzle and is finally sprayed out in a better atomization mode. When the test is finished, the pressure of the fuel flowing from the fuel supply nozzle 21 is reduced, the plunger 232 returns to the initial position by the opening valve spring 234, and the tapered sealing portion thereof comes into close contact with the opening valve liner 231 again, thereby sealing the fuel upstream of the opening valve structure.
The sealing structure consists of a hard sealing structure and a soft sealing structure, and when the soft sealing position is damaged, the hard sealing surface is contacted, so that the dual protection effect is achieved.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. The utility model provides a modified vice oil circuit fuel nozzle valve seal structure which characterized in that, valve seal structure includes:
an oil supply nipple;
a secondary nozzle interface;
the shell is arranged between the oil supply connector and the auxiliary nozzle interface, and a cavity is formed in the shell;
the opening door lining is fixedly arranged in the containing cavity, and a plurality of oil leakage holes communicated with the oil supply connector and the auxiliary nozzle connector are formed in the opening door lining;
a plunger penetrating the opening door liner and movable relative to the opening door liner, the plunger being supported on the opening door liner by an opening spring; and
the oil filter is arranged on one side, opposite to a fuel inlet, of the opening door liner, covers the oil leakage hole and is used for filtering fuel entering from the fuel supply connector;
the opening door liner is provided with a protrusion pointing to the plunger, the plunger is provided with a groove and a conical sealing surface, the groove is matched with the protrusion, the top surface of the groove and the conical sealing surface are arranged in a non-coplanar mode, soft sealing media are arranged in the groove, the opening door liner is provided with a conical chamfer matched with the conical sealing surface, when fuel flowing in from the fuel supply connector reaches a preset pressure, the fuel pushes the plunger to move through the oil leakage hole and flows out from the auxiliary nozzle connector, and when the fuel flowing in from the fuel supply connector does not reach the preset pressure, the protrusion is in contact with the soft sealing media, so that the fuel can be stored on one side of the fuel supply connector of the opening door liner.
2. The improved secondary fuel line nozzle flap seal arrangement as set forth in claim 1, wherein said housing is removably connected to said fuel supply nipple; the shell is fixedly connected with the auxiliary nozzle interface.
3. The improved secondary fuel line nozzle flap seal structure as set forth in claim 1, wherein said secondary nozzle interface includes an external nut and a tapered nipple for connection to a secondary nozzle, said external nut and tapered nipple being fixedly connected integrally to said housing.
4. An improved secondary fuel nozzle flap seal arrangement as set forth in claim 1 in which a gasket is disposed between said housing and said fuel nozzle for effecting a seal between said housing and said fuel nozzle.
5. The improved secondary fuel line nozzle flap seal arrangement as set forth in claim 1, wherein said fuel filter is captured between said fuel filler neck and said opening door liner by a compression spring.
6. An improved secondary fuel line nozzle shutter seal structure as claimed in claim 1, wherein said plunger has a stop collar mounted at its end by a collar, and said opening spring is disposed between the stop collar and the opening door liner.
7. The improved secondary fuel line nozzle flap seal structure as set forth in claim 1, wherein a plurality of said oil leak holes are circumferentially spaced about the axis of opening the gate bushing.
8. The improved secondary fuel line nozzle flap seal structure as set forth in claim 1, wherein said soft sealing medium is rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011125880.7A CN112254170B (en) | 2020-10-20 | 2020-10-20 | Improved sealing structure of auxiliary oil way fuel nozzle valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011125880.7A CN112254170B (en) | 2020-10-20 | 2020-10-20 | Improved sealing structure of auxiliary oil way fuel nozzle valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112254170A CN112254170A (en) | 2021-01-22 |
| CN112254170B true CN112254170B (en) | 2022-06-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011125880.7A Active CN112254170B (en) | 2020-10-20 | 2020-10-20 | Improved sealing structure of auxiliary oil way fuel nozzle valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112254170B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3938905A1 (en) * | 1989-11-24 | 1991-05-29 | Bmw Rolls Royce Gmbh | Hydraulic pressure restricting valve - has housing with valve inlet and outlet, conical seating valve and valve piston with seal |
| CN105383707A (en) * | 2015-11-30 | 2016-03-09 | 中国航空工业集团公司沈阳飞机设计研究所 | Aviation pressure refueling adapter |
| CN106762156A (en) * | 2016-12-21 | 2017-05-31 | 长春航空液压控制有限公司 | Engine fuel turns off valve assembly |
| CN107023401A (en) * | 2017-05-28 | 2017-08-08 | 西安成立航空制造有限公司 | A kind of aero-engine fuel nozzle pre-combustion grade auxiliary oil circuit valve and its application method |
| CN206592212U (en) * | 2017-01-23 | 2017-10-27 | 中国航发沈阳发动机研究所 | A kind of valve hermetical structure and the aircraft engine jettison gear with it |
| CN207796204U (en) * | 2018-01-22 | 2018-08-31 | 安徽天盾人防工程设备有限公司 | A kind of new type explosion proof overpressure exhaust valve |
| CN110886660A (en) * | 2018-09-10 | 2020-03-17 | 中国航发商用航空发动机有限责任公司 | Electric control valve adjusting device of gas turbine combustion chamber nozzle |
| CN110985213A (en) * | 2019-12-11 | 2020-04-10 | 中国航空工业集团公司沈阳飞机设计研究所 | Differential pressure type self-adjusting valve |
-
2020
- 2020-10-20 CN CN202011125880.7A patent/CN112254170B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3938905A1 (en) * | 1989-11-24 | 1991-05-29 | Bmw Rolls Royce Gmbh | Hydraulic pressure restricting valve - has housing with valve inlet and outlet, conical seating valve and valve piston with seal |
| CN105383707A (en) * | 2015-11-30 | 2016-03-09 | 中国航空工业集团公司沈阳飞机设计研究所 | Aviation pressure refueling adapter |
| CN106762156A (en) * | 2016-12-21 | 2017-05-31 | 长春航空液压控制有限公司 | Engine fuel turns off valve assembly |
| CN206592212U (en) * | 2017-01-23 | 2017-10-27 | 中国航发沈阳发动机研究所 | A kind of valve hermetical structure and the aircraft engine jettison gear with it |
| CN107023401A (en) * | 2017-05-28 | 2017-08-08 | 西安成立航空制造有限公司 | A kind of aero-engine fuel nozzle pre-combustion grade auxiliary oil circuit valve and its application method |
| CN207796204U (en) * | 2018-01-22 | 2018-08-31 | 安徽天盾人防工程设备有限公司 | A kind of new type explosion proof overpressure exhaust valve |
| CN110886660A (en) * | 2018-09-10 | 2020-03-17 | 中国航发商用航空发动机有限责任公司 | Electric control valve adjusting device of gas turbine combustion chamber nozzle |
| CN110985213A (en) * | 2019-12-11 | 2020-04-10 | 中国航空工业集团公司沈阳飞机设计研究所 | Differential pressure type self-adjusting valve |
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| Publication number | Publication date |
|---|---|
| CN112254170A (en) | 2021-01-22 |
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