CN206257700U - A kind of welding structure formula engine fuel nozzle - Google Patents
A kind of welding structure formula engine fuel nozzle Download PDFInfo
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- CN206257700U CN206257700U CN201621401860.7U CN201621401860U CN206257700U CN 206257700 U CN206257700 U CN 206257700U CN 201621401860 U CN201621401860 U CN 201621401860U CN 206257700 U CN206257700 U CN 206257700U
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- nozzle
- nozzle body
- eddy flow
- engine fuel
- welding structure
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Abstract
The utility model discloses a kind of welding structure formula engine fuel nozzle, including nozzle body, the spout assembly connected with nozzle body inside is provided with nozzle body, it is provided with spout assembly for compressing spout assembly and providing the hold-down mechanism for blowing down ejecting opening surface carbon distribution and cooling effect, spout assembly and eddy flow groove that is oblique and forming helical structure are provided through in spout assembly, eddy flow groove is evenly distributed on main cyclone device, and oil filter is fixed on the porch of two joints by jump ring.The nozzle connection of the fuel nozzle uses bar machine add-on type respectively with nozzle body, nozzle body is obtained by welding again, nozzle body is lightweight, and intensity, the life-span, material internal quality better than equivalent material precision castings, effectively reduce fuel nozzle manufacture difficulty and shorten manufacturing cycle reduction, mist cone opening time is short, low oil pressure needed for atomization, nozzle mist cone stability preferably, can overcome the spray cone angle of pressure atomization formula nozzle to increase and the shortcoming of reduction with fuel flow.
Description
Technical field
The utility model belongs to aeroplane engine machine nozzle field, and in particular to a kind of welding structure formula engine fuel spray
Mouth.
Background technology
Aero-engine is the thermal machine of a kind of high complexity and precision, the hair of power for needed for airborne vehicle provides flight
Motivation.As the heart of aircraft, " flower of industry " is described as, it directly affects performance, reliability and the economy of aircraft, is one
The important embodiment of individual national science and technology, industry and military capability of the country.
Fuel nozzle as aeroengine combustor buring room important component, its high-quality and reliable and stable performance pair
All significant in aero-engine, its service behaviour directly affects power, fuel economy and the reliability of engine
Property.Used as the terminal of fuel injection system, the structure and geometric parameter of nozzle are influence fuel flow characteristic, performance indications, spray
The key factor of mist quality, final influence engine chamber efficiency and performance indications.
At present engine nozzle field it is most widely used be two-way dual chamber centrifuging temperature nozzle, but this kind of nozzle housing
Body is all to use casting, and its high processing costs, percent defective during processing is also high, while the manufacturing cycle is long, and product
Service life is short.And nozzle opening time is long, cause to be atomized that required oil pressure is higher, the less stable of nozzle mist cone, while
The spray cone angle of nozzle increases and reduces with fuel flow, and causing the nebulization efficiency of nozzle reduces, especially in pressure atomization formula
It is particularly evident in nozzle.
Utility model content
Technical problem to be solved in the utility model is the casting spray of existing two-way dual chamber centrifuging temperature nozzle
Mouth case weight weight, the manufacturing cycle is long, high cost, and nozzle opening time is long, and it is higher to cause to be atomized required oil pressure, nozzle mist
The less stable of cone, the nebulization efficiency reduction of nozzle, therefore devise a kind of welding structure formula engine fuel nozzle, the combustion
The nozzle connection of oil burner nozzle uses bar machine add-on type respectively with nozzle body, then obtains nozzle body by welding, reduces into
This, nozzle body is lightweight, and intensity, life-span, material internal quality are much better than the precision castings of equivalent material, effectively reduce fuel oil
Nozzle manufacture difficulty and shorten the manufacturing cycle reduce, mist cone opening time it is short, atomization needed for low oil pressure, nozzle mist bore stability compared with
Shortcoming good, that the spray cone angle of pressure atomization formula nozzle can be overcome to increase with fuel flow and reduce.
The utility model is achieved through the following technical solutions：
A kind of welding structure formula engine fuel nozzle, including nozzle body, are provided with and nozzle on the nozzle body
The spout assembly of enclosure interior connection, is provided with spout assembly for compressing spout assembly and providing blowing ejecting opening surface carbon distribution
With the hold-down mechanism of cooling effect, be provided with the spout assembly some through spout assembly inside and outside wall and it is oblique simultaneously
Form the eddy flow groove of helical structure.At present engine nozzle field it is most widely used be two-way dual chamber centrifuging temperature nozzle,
Although the nozzle body of this kind of fuel nozzle also includes nozzle body and nozzle connection, nozzle body and nozzle connection are all
It is directly overall structure to be, is molded by the way of casting, and even using precision castings, its weight is also weighed, and cast member is due to work
The reason such as skill quality and material shaping characteristic, is all restricted at aspects such as intensity, life-span and material internal quality, while
Because the complex structure of nozzle body, casting difficulty are big, the manufacturing cycle is long, and typically all can only in high volume manufacture to reduce
Cost, and the use of two-way dual chamber centrifuging temperature nozzle is sometimes small lot, such manufacturing cost too higher position reduces product
The competitiveness of product, spout assembly is the existing part of fuel nozzle, and it is used to realize that fuel oil is formed into mist cone sprays, but in spray
Mouth intermediate fuel oil can be collided when drawing with wall, and its extraction location is single, and fuel oil there is also collision in itself with extraction channel, deposit
In barrier effect, reduce further fuel oil and draw pressure, the eddy flow for ultimately forming can be produced with swirl path and slowed down, make
Mist formation wimble structure is unstable, and opening time is more long, after being especially also easy to have increasing amount of fuel in pressure atomization formula nozzle
The phenomenon that spray cone angle increases and reduces with fuel flow on the contrary, causes to lose more than gain, further the work of influence aero-engine
, there is very big potential safety hazard in efficiency.And the welding structure formula engine fuel nozzle of this programme design, nozzle connection and nozzle
Main body uses bar machine add-on type respectively, then obtains nozzle body by welding, and nozzle body weighs less than precision castings, and by force
Degree, life-span, material internal quality are much better than the precision castings of equivalent material, effectively reduce fuel nozzle manufacture difficulty and shorten manufacturing
Cycle is reduced, and especially has notable cost advantage in small lot manufacture.All parts can be formed streamline by the mode of welding
Process respectively, complex structure is difficult to the defect being molded when solving monoblock cast, weld by the way of full weld, solder joint is connected
Nozzle connection and nozzle body weld seam gapless are formed, will not be leaked from commissure so when fuel oil passes through, while will also be main
In the spout assembly that spout, cap jet and main cyclone device are formed, main cyclone device and cap jet constitute Fu Lu spin chambers, main injection jet and
Cap jet constitutes main road spin chamber, and eddy flow groove is arranged on main cyclone device, and through the inside and outside wall of main cyclone device, also by eddy flow groove
The termination run through with main cyclone device outer wall connects with the top of main cyclone device simultaneously, and the quantity of eddy flow groove is preferably four, will
Four eddy flow groove is evenly distributed on main cyclone device along the center line of main cyclone device.The particular number of eddy flow groove is according to actual need
Ask and set, but at least two, it is symmetrical arranged along the center line of main cyclone device when eddy flow groove is two, eddy flow groove
For more than two when, it is necessary to eddy flow groove is evenly distributed on main cyclone device along the center line of main cyclone device, so formed
Eddy flow can throughout keep very strong dynamics, obtain oil pressure compensation, form larger inside and outside differential pressure, obtain the mist of stabilization
Cone, its low oil pressure needed for atomization, mist cone opening time is shorter, and spray cone angle will not increase and reduce with fuel flow.Eddy flow groove
As by fuel oil from the passage of right wing introducing spin chamber, fuel oil is finally formed one strong eddy flow in spin chamber, if only
Only it is to open up several grooves, although it can form drainage channel, eddy flow can be formed in the presence of fuel oil itself impulsive force,
But the intensity of eddy flow is not strong, while the collision with rotating path and with wall, being rotated in spin chamber gradually to weaken,
Mist is caused to bore the time opened long while unstable, and be designed as eddy flow groove through main cyclone device inside and outside wall and in inclining by this programme
Ramp-like and form helical structure, state analysis when being guided to fuel oil according to reality is 13 ° at the angle of inclination of eddy flow groove
In the range of to 19 ° and eddy flow groove spiral status be constant speed spiral when, the effect required for can be only achieved this programme, more than this
Scope, its DeGrain plays a part of indistinction with regular troughs, and constant speed is threaded through polar coordinates expression, and it calculates public
Formula is：R=a θ, wherein R are polar diameter, and θ is polar angle, and α is constant.This programme oblique is combined by the way that eddy flow groove is designed as with spiral
Structure such that it is able to realization fuel oil is guided, form tangent with main cyclone wall face, will can be guided out from oil circuit
Help is formed to fuel oil while fuel oil, as fuel flow direction forms eddy flow, multiple eddy flow grooves cause that fuel oil carries out eddy flow
Chamber interior formed different azimuth compensation so that obtained in spin chamber stabilization high pressure eddy flow, can be formed stabilization and
The mist cone of high pressure, by the quick opening of mist cone, simultaneously because eddy flow groove is compensated fuel pressure itself, reduces impact and damages
Consumption, under the requirement of equal discharge coefficient, its low oil pressure needed for atomization, the helix parameter of eddy flow groove can be adjusted as needed,
Even increase amount of fuel, its spray cone angle is also to increase therewith, increasing with fuel flow without spray cone angle and subtracting
Small phenomenon, further ensures the safety in utilization of aero-engine.
Jump ring and machine filter also are mounted in one end inner chamber of the nozzle connection away from nozzle body, machine filter is arranged on jump ring
And nozzle body between.Jump ring and machine filter are all existing structures, and the effect of machine filter is miscellaneous to being harmful in the machine oil from oil sump
Matter is filtered, and with clean engine oil supplying nozzle, jump ring is also back-up ring or clasp, belongs to one kind of fastener, for mounted in machine
In device, the axial trough of equipment or hole slot, play a part of to prevent the part axial motion on axle or on hole.Jump ring is to use in this programme
Moved in nozzle connection in machine filter is prevented.
Hold-down mechanism is atomization nut, and it passes through threaded engagement on nozzle body, main cyclone device is compressed.Atomization
Nut is also referred to as atomizer nut, and its Main Function is to play compression spout assembly and provide blowing ejecting opening surface carbon distribution and cold
But, while being provided with the locking plate of sealing and positioning action also between nozzle body and hold-down mechanism.
The utility model compared with prior art, has the following advantages and advantages：
(1) the utility model manufactures nozzle connection and nozzle body separate machined, adds form to substitute using bar machine and passes
The casting of system nozzle body, greatly reduces processing cost, shortens the manufacturing cycle, increases the service life of product；
(2) the utility model is provided with that four uniform, band gradient, spiral helicine eddy flow on the cyclone of fuel nozzle
Groove, under equal test condition, mist cone opening time is considerably shorter than conventional structure cyclone；
(3) under the requirement of equal discharge coefficient, its oil pressure needed for atomization is less than conventional structure structure eddy flow to the utility model
Device；
(4) the utility model is in the Fu Lu spin chambers of equivalent constructions type, and nozzle mist cone stability is preferable；
(5) the utility model in the Fu Lu spin chambers of equivalent constructions type by adjusting specific helix parameter, can be one
Determine the shortcoming for overcoming the spray cone angle of pressure atomization formula nozzle to increase with fuel flow and reduce in degree.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the utility model embodiment, constitutes the one of the application
Part, does not constitute the restriction to the utility model embodiment.In the accompanying drawings：
Fig. 1 is structural representation of the present utility model；
Fig. 2 is sectional view of the present utility model；
Fig. 3 is the structural representation of nozzle body；
Fig. 4 is the side view of main cyclone；
Fig. 5 is the top view of main cyclone.
Mark and corresponding parts title in accompanying drawing：
1- is atomized nut, 2- cap jets, 3- main injection jets, 4- main cyclone devices, 5- nozzle bodies, 6- machine filters, 7- jump rings, 8- locks
Piece, 9- oil inlets one, 10- oil inlets two, 11- nozzle bodies, 12- welds, 13- nozzle connections, 14- eddy flow grooves.
Specific embodiment
To make the purpose of this utility model, technical scheme and advantage become more apparent, with reference to embodiment and accompanying drawing,
The utility model is described in further detail, and exemplary embodiment of the present utility model and its explanation are only used for explaining this
Utility model, is not intended as to restriction of the present utility model.
Embodiment：
As shown in Figures 1 to 5, a kind of welding structure formula engine fuel nozzle, including nozzle body 5, the nozzle housing
Body 5 includes nozzle body 11 and nozzle connection 13, and the quantity of nozzle connection 13 has two, every nozzle connection 13 respectively with spray
Mouth main body 11 is welded and fixed, while to be connected corresponding to the fuel gallery all the way in nozzle connection 13, wherein weld 12 is located at
The outer wall of nozzle body 11, weld seam is full weld.Jump ring 7 and machine filter 6, oil filter 6 are fitted with the every cavity of nozzle connection 13
The porch of two joints is fixed on by jump ring 7, machine filter 6 is arranged between jump ring 7 and nozzle body 11.Wherein one nozzle is connect
First 13 entrance is named as oil inlet 1, and the entrance of another nozzle connection 13 is named as oil inlet 2 10, in fuel gallery
End is provided with spout assembly, and spout assembly includes main injection jet 3, cap jet 2 and main cyclone device 4, and main cyclone device 4 and cap jet
2 constitute Fu Lu spin chambers, and main injection jet 3 and cap jet 2 constitute main road spin chamber, and four in 13 ° to 19 ° gradients and form constant speed spiral shell
The eddy flow groove 14 of spin line shape is arranged on main cyclone device 4, and every eddy flow groove 14 is through the inside and outside wall of main cyclone device 4, while rotation
The termination that chute 14 runs through with the outer wall of main cyclone device 4 connects with the top of main cyclone device 4 simultaneously, by four eddy flow grooves 14 along master
The center line of cyclone 4 is evenly distributed on main cyclone device 4.
It is provided with nozzle body 5 and uses the atomization nut 1 that threaded engagement mode is fixed as hold-down mechanism, mist with it
Changing nut 1 is used to compress spout assembly and provides blowing ejecting opening surface carbon distribution and cooling effect, and the bottom of main cyclone device 4 is enclosed within
Inside atomization nut 1, locking plate 8,8 sealings of locking plate and positioning action are also provided between nozzle body 5 and atomization nut 1,
Prevent mist of oil from being overflowed between nozzle body 5 and atomization nut 1.
During work, fuel oil enters from the joint oil inlet of nozzle two, is entered into spout assembly by jump ring 7, oil filter 6, passes through
Cross four uniform eddy flow grooves 14 with gradient on main cyclone device 4 to enter in spin chamber, one strong eddy flow is formed, finally inside and outside
Under the promotion of pressure difference, sprayed into combustion chamber from spout spray orifice in taper oil film form.
Performance indications of the present utility model are high, manufacture difficulty is relatively low, can be effectively improved nozzle atomization quality and performance refers to
Mark and the manufacturing cost of small lot can be reduced, manufactured by by nozzle body separate machined, add form to substitute biography using bar machine
Unite the casting of nozzle body, nozzle body weight is slightly below precision castings, and intensity, life-span, material internal quality are much better than
The precision castings of equivalent material, greatly reduce processing cost, shorten the manufacturing cycle, increase the service life of product, especially small quantities of
Amount manufacture has notable cost advantage.And be provided with that four uniform on the cyclone of fuel nozzle, band gradient, spiral helicine rotation
Chute, under equal test condition, mist cone opening time is considerably shorter than conventional structure cyclone；In the requirement of equal discharge coefficient
Under, its oil pressure needed for atomization is less than conventional structure structure cyclone；In the Fu Lu spin chambers of equivalent constructions type, nozzle mist cone is steady
It is qualitative preferable；In the Fu Lu spin chambers of equivalent constructions type by adjusting specific helix parameter, pressure can be to a certain extent overcome
The shortcoming that the spray cone angle of power atomized spray injectior increases and reduces with fuel flow.
Above-described specific embodiment, is entered to the purpose of this utility model, technical scheme and beneficial effect
One step is described in detail, be should be understood that and be the foregoing is only specific embodiment of the present utility model, is not used to limit
Fixed protection domain of the present utility model, all any modifications within spirit of the present utility model and principle, made, equally replaces
Change, improve, should be included within protection domain of the present utility model.
Claims (10)
1. a kind of welding structure formula engine fuel nozzle, including nozzle body (5), be provided with the nozzle body (5) with
The spout assembly of connection, is provided with spout assembly for compressing spout assembly and providing blowing spout inside nozzle body (5)
Area carbon and the hold-down mechanism of cooling effect, it is characterised in that some are provided with the spout assembly through spout group
Part inside and outside wall and eddy flow groove (14) that is oblique and forming helical structure.
2. a kind of welding structure formula engine fuel nozzle according to claim 1, it is characterised in that the spout assembly
Including main injection jet (3), cap jet (2) and main cyclone device (4), and main cyclone device (4) constitutes Fu Lu spin chambers with cap jet (2),
Main injection jet (3) and cap jet (2) constitute main road spin chamber, and eddy flow groove (14) is arranged on main cyclone device (4), and through main cyclone
The inside and outside wall of device (4).
3. a kind of welding structure formula engine fuel nozzle according to claim 1, it is characterised in that the eddy flow groove
(14) angle of inclination is 13 ° to 19 °.
4. a kind of welding structure formula engine fuel nozzle according to claim 1, it is characterised in that the eddy flow groove
(14) spiral status are constant speed spiral, and R=a θ, wherein R are polar diameter, and θ is polar angle, and α is constant.
5. a kind of welding structure formula engine fuel nozzle according to claim 2, it is characterised in that the eddy flow groove
(14) termination run through with main cyclone device (4) outer wall connects with the top of main cyclone device (4) simultaneously.
6. a kind of welding structure formula engine fuel nozzle according to claim 5, it is characterised in that the eddy flow groove
(14) quantity is four, and four eddy flow grooves (14) are evenly distributed on main cyclone device (4) along the center line of main cyclone device (4)
On.
7. a kind of welding structure formula engine fuel nozzle according to claim 1, it is characterised in that the nozzle body
(5) including nozzle body (11) and nozzle connection (13), and nozzle connection (13) and nozzle body (11) are welded to each other fixation
And connect.
8. a kind of welding structure formula engine fuel nozzle according to claim 7, it is characterised in that the nozzle connection
(13) away from jump ring (7) and machine filter (6) is mounted in one end inner chamber of nozzle body (11), machine filter (6) is arranged on jump ring (7)
And nozzle body (11) between.
9. a kind of welding structure formula engine fuel nozzle as claimed in any of claims 1 to 8, its feature exists
In the hold-down mechanism is atomization nut (1), and it passes through threaded engagement on nozzle body (5).
10. a kind of welding structure formula engine fuel nozzle as claimed in any of claims 1 to 8, its feature exists
In the nozzle body (5) has been provided with the locking plate (8) of sealing and positioning action and hold-down mechanism between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621401860.7U CN206257700U (en) | 2016-12-20 | 2016-12-20 | A kind of welding structure formula engine fuel nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621401860.7U CN206257700U (en) | 2016-12-20 | 2016-12-20 | A kind of welding structure formula engine fuel nozzle |
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| Publication Number | Publication Date |
|---|---|
| CN206257700U true CN206257700U (en) | 2017-06-16 |
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ID=59030480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621401860.7U Active CN206257700U (en) | 2016-12-20 | 2016-12-20 | A kind of welding structure formula engine fuel nozzle |
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| Country | Link |
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| CN (1) | CN206257700U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106705123A (en) * | 2016-12-20 | 2017-05-24 | 成都航利航空科技有限责任公司 | Welding structure type fuel spray nozzle of engine |
| CN107490021A (en) * | 2017-08-03 | 2017-12-19 | 西北工业大学 | A kind of big flow allowance fuel nozzle assembly |
-
2016
- 2016-12-20 CN CN201621401860.7U patent/CN206257700U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106705123A (en) * | 2016-12-20 | 2017-05-24 | 成都航利航空科技有限责任公司 | Welding structure type fuel spray nozzle of engine |
| CN107490021A (en) * | 2017-08-03 | 2017-12-19 | 西北工业大学 | A kind of big flow allowance fuel nozzle assembly |
| CN107490021B (en) * | 2017-08-03 | 2019-05-10 | 西北工业大学 | A kind of big flow allowance fuel nozzle assembly |
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