CN203928003U - Be applied to the fuel nozzle of fractional combustion chamber, aero-engine center - Google Patents
Be applied to the fuel nozzle of fractional combustion chamber, aero-engine center Download PDFInfo
- Publication number
- CN203928003U CN203928003U CN201420220056.3U CN201420220056U CN203928003U CN 203928003 U CN203928003 U CN 203928003U CN 201420220056 U CN201420220056 U CN 201420220056U CN 203928003 U CN203928003 U CN 203928003U
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- China
- Prior art keywords
- oil circuit
- oil
- fuel
- spout
- fuel nozzle
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 89
- 239000000446 fuel Substances 0.000 title claims abstract description 57
- 239000003921 oil Substances 0.000 claims abstract description 108
- 239000000295 fuel oil Substances 0.000 claims abstract description 32
- 230000008520 organization Effects 0.000 claims abstract description 18
- 239000012530 fluid Substances 0.000 claims abstract description 9
- 230000000694 effects Effects 0.000 claims abstract description 8
- 239000003344 environmental pollutant Substances 0.000 abstract description 5
- 238000002347 injection Methods 0.000 abstract description 5
- 239000007924 injection Substances 0.000 abstract description 5
- 231100000719 pollutant Toxicity 0.000 abstract description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 description 4
- -1 carbon hydrogen Chemical class 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Landscapes
- Nozzles For Spraying Of Liquid Fuel (AREA)
Abstract
The utility model provides a kind of fuel nozzle that is applied to fractional combustion chamber, aero-engine center.Combustion chamber is provided with main combustion stage and pre-combustion grade.Fuel nozzle is provided with jet stem, organizes spout more, organizes oil collecting ring and controlling organization more, is provided with and often opens oil circuit and controlled oil circuit in jet stem.Often open oil circuit and be communicated with one group of oil collecting ring fluid, controlled oil circuit is communicated with other group oil collecting ring fluid.Controlling organization is divided into multichannel for the fuel oil of main combustion stage is in charge of to the fuel oil providing, and a road flows to and often opens oil circuit, and all the other roads controllably flow to controlled oil circuit.Fuel nozzle of the present utility model has improved the fuel-injection pressure of combustion chamber classification dotted state, has ensured atomizing effect, thereby improves efficiency of combustion and disposal of pollutants.
Description
Technical field
The utility model belongs to energy and power engineering burner field, particularly aeroengine combustor buring chamber.
Background technology
Along with atmospheric environment problem worldwide receives increasing concern, it is also more and more harsh requiring for aero-engine pollutant emission.The Aeroengine Products market demand of future generation shows, the discharge capacity of nitrogen oxide (NOx) will further reduce by 45%～60% left and right than the required standard CAEP6 of existing International Civil Aviation Organization (ICAO), and other emission comprises that the same needs of carbon monoxide (CO), unburned carbon hydrogen (UHC) and smog (Smoke) discharge value further reduce.
Research shows, the indoor combustion reaction temperature of control combustion is the key of controlling NOx disposal of pollutants, and one of Major Technology of control combustion reaction temperature is exactly to adopt lean premixed combustion mode.But under the duty such as ground idle speed, starting ignition, need again partial combustion district to adopt the fuel-air matching mode of fuel-rich combustion, to maintain combustion stability, reduce CO and UHC discharge under small-power state simultaneously.In order to alleviate the contradiction that under the discharge of NOx under high-power state and small-power state, CO, UHC discharge, the general pattern that adopts fractional combustion, to ensure that engine each regional area in its combustion chamber under various operating modes all carries out the combustion reaction of efficient stable to approach best fuel-air match pattern separately.
The grading combustion technology application of having succeeded on aeroengine combustor buring chamber, the dicyclo cavity combustion chamber grading combustion technology adopting such as GE90 engine; The center grading combustion technology that GEnx engine adopts etc.And adopt center grading combustion technology because compact conformation, subregion poor oil firing control the advantages such as NOx effect is better, be the trend of low emission combustor development.But existing oil-poor center grading combustion technology, still fail to solve well after subregion between each reaction zone, interact, medium-heavy duty efficiency of combustion is low, the still problem such as insufficient, inhomogeneous of primary zone air-fuel mixture.
Fractional combustion, by fuel distribution is arrived to main combustion stage and pre-combustion grade nozzle, only has pre-combustion grade fuel feeding under little operating mode, under large operating mode, open main combustion stage again, and most of fuel oil is carried out to premix and pre-evaporation burning by main combustion stage, thereby reduces discharge.But near operating mode fuel oil classification point, main combustion stage has just started fuel feeding, and fuel flow is smaller, and injection drop is low, causes fuel-oil atmozation of poor quality, and chamber performance is caused to adverse effect.
For addressing this problem, conventionally adopt the method for the further classification of main combustion stage fuel oil, wherein a kind of method is by whole combustion chamber main combustion stage nozzle groupings, on main combustion stage fuel manifold, valve is set, and controls the switch of a certain group of main combustion stage nozzle.Although this method has reduced fuel oil circulation area, thereby increase the pressure drop of fuel nozzle.But this kind of method causes the fuel flow of each nozzle inconsistent, thereby cause efficiency of combustion and outlet temperature distribution variation.And this kind of method needs electronic engine management system that the signal of valve opening is provided.
Utility model content
The purpose of this utility model is to provide one and can makes engine combustion efficiency improve, and the fuel nozzle of disposal of pollutants reduction.
For achieving the above object, the utility model provides a kind of fuel nozzle that is applied to fractional combustion chamber, aero-engine center, described combustion chamber is provided with main combustion stage and pre-combustion grade, it is characterized in that: described fuel nozzle is provided with jet stem, many group spouts, many group oil collecting rings and controlling organization, in described jet stem, be provided with and often open oil circuit and controlled oil circuit, the described oil circuit of often opening is communicated with one group of oil collecting ring fluid, described controlled oil circuit is communicated with other group oil collecting ring fluid, described controlling organization is divided into multichannel for the fuel oil of main combustion stage is in charge of to the fuel oil providing, one road flows to the described oil circuit of often opening, all the other roads controllably flow to described controlled oil circuit.
In one preferred embodiment, described controlling organization is provided with check valve, described check valve be placed in that described fuel oil is in charge of and described controlled oil circuit between, for controlling the connection of described controlled oil circuit and closing.
Above preferred embodiment is total, described check valve comprises valve pocket, in described valve pocket, be provided with spring and valve plug, make the pressure that bears when described check valve hour, described valve plug is valve-off under the effect of described spring, thereby closes described controlled oil circuit, and the pressure bearing at described check valve is while exceeding certain threshold value, valve opening, thus described controlled oil circuit opened.
In another preferred embodiment, described fuel nozzle is provided with two groups of spouts and two groups of oil collecting rings, and first group of spout is connected with the first oil collecting ring, and second group of spout is connected with the second oil collecting ring, and the described oil circuit of often opening is connected with the first oil collecting ring, and described controlled oil circuit is connected with described the second oil collecting ring.
Preferably, the quantity of the described spout of often opening oil circuit is 4-8.
Preferably, the quantity of the spout of the controlled oil circuit in every road is 4-8.
Preferably, the described spout of oil circuit and the spout of described controlled oil circuit often opened be from the horizontal by 30-90 degree angle, and along tilting away from the described direction of often opening oil circuit.
Preferably, describedly often open a part of spout in the spout of oil circuit and the spout of described controlled oil circuit radially to inner opening, and radially outward opening of another part spout.
Brief description of the drawings
Fig. 1 is the cross-sectional schematic that adopts the chief component of mixing device in the combustion chamber of fuel nozzle of the present utility model.
Fig. 2 is the cutaway view schematic diagram according to the fuel nozzle of an embodiment of the present utility model.
Reference numeral:
1. first group of spout; 2. second group of spout; 3. the first oil collecting ring; 4. the second oil collecting ring; 5. often open oil circuit; 6. controlled oil circuit; 7. controlling organization; 8. check valve; 9. main combustion stage fuel oil is in charge of; 10. main combustion stage jet stem; 20. pre-combustion grade; 30. intergrades; 40. main combustion stages.
Detailed description of the invention
Below with reference to accompanying drawing, preferred embodiment of the present utility model is elaborated, understands the purpose of this utility model, feature and advantage so that clearer.It should be understood that embodiment shown in the drawings is not the restriction to the utility model scope, and just for the connotation of technical solutions of the utility model is described.In accompanying drawing, identical element indicates with same or analogous Reference numeral.
Relational language is explained:
Combustion chamber: in gas turbine, for organizing the parts of fuel generation combustion reaction;
Fractional combustion: a kind ofly reduce the combustion strategies that discharge adopts, have the hierarchical policys such as axially staged, radial grading and center classification;
Main combustion stage: in the hierarchical policy of center, combustion chamber, the one-level of main burning is called main combustion stage, conventionally closes under unskilled labourer's condition, opens under other operating mode;
Pre-combustion grade: also referred to as level on duty, conventionally in normally open, for starting and increase flame stabilization performance;
Classification nozzle: the fuel nozzle that several different discharge characteristics can be provided
Fig. 1 illustrates the structural representation cutaway view of the mixing device of the fractional combustion chamber, center that adopts fuel nozzle of the present utility model.Mixing device is made up of pre-combustion grade and main combustion stage (some also has intergrade), and every one-level has fuel feeding and feeder.The concrete structure of this mixing device can be called " mixing device, combustion chamber and aero-engine " utility model patent referring to the utility model name of same applicant's 2012 submission in 21, on July, its Granted publication number is CN202675358U, and this utility model patent is included in herein by reference.
In this mixing device, pre-combustion grade 20 is positioned at the center of mixing device, comprises the pre-combustion grade fuel nozzle and two the swirling inlet devices that are positioned at center, between two-stage swirling inlet device, is provided with Venturi tube.Pre-combustion grade periphery is intergrade 30, and intergrade 30 is made up of a swirling inlet device and multipoint fuel nozzle and premixed channel.Intergrade 30 peripheries are main combustion stage 40, and main combustion stage 40 is made up of a swirling inlet device, multipoint fuel nozzle and premixed channel.
In the utility model, the fuel nozzle of main combustion stage is provided with jet stem 10, organizes spout 1 more, 2, organize oil collecting ring 3 more, 4 and controlling organization 8, in jet stem 10, be provided with and often open oil circuit 5 and controlled oil circuit 6, often open oil circuit 5 and be communicated with one group of oil collecting ring 3 fluid, controlled oil circuit 6 is communicated with other group oil collecting ring 4 fluids, controlling organization 8 is divided into multichannel for the fuel oil of main combustion stage is in charge of to the fuel oil providing, and a road flows to the described oil circuit 5 of often opening, and all the other roads controllably flow to described controlled oil circuit 6.
In embodiment shown in Fig. 2, be provided with two groups of spouts, the fuel oil injection direction of these two groups of spouts can be identical or contrary.First group of spout 1 is connected with the first oil collecting ring 3, and second group of spout 2 is connected with the second oil collecting ring 4.Main combustion stage fuel oil is in charge of 9 and is connected with fuel manifold (not shown), main combustion stage fuel oil is in charge of 9 and is provided with controlling organization 7 with the connecting place of main combustion stage jet stem 10, controlling organization 7 is in charge of 9 fuel oils that provide by fuel oil and is divided into two-way, one tunnel is that Chang Kai becomes and often opens oil circuit 5, and another pipeline is blocked by the valve 8 in controlling organization and become controlled oil circuit 6.Often open oil circuit 5 and be connected 3 with the first oil collecting ring, controlled oil circuit 6 is connected with the second oil collecting ring 4.
(not shown) in another embodiment, can arrange 1 Lu Changkai oil circuit 5, and 2 roads above controlled oil circuit 6, for example controlled oil circuit of the 2 controlled oil circuit in tunnel or 3 tunnels are set simultaneously.
In one preferred embodiment, controlling organization 7 is provided with and often opens stream 11 and check valve 8.Often open stream 11 for ensureing that often opening oil circuit 5 is in charge of 9 all the time in fluid connected state with fuel oil.Check valve 8 be placed in fuel oil be in charge of 9 and controlled oil circuit 6 between, for controlling the connection of controlled oil circuit 6 and closing.Check valve 8 is made up of valve pocket 80, spring 81 and valve plug 82, and spring 81 and valve plug 82 are contained in valve pocket 80.Hour, valve plug 82 is valve-off under the effect of spring 81, thereby closes controlled oil circuit 6 for the pressure bearing when check valve 80.When the pressure bearing at check valve 80 exceedes certain threshold value, valve opening, thus open controlled oil circuit 6.
It it is pointed out that the controlling organization 7 that can adopt other form, as long as can realize the opening and closing of controlled oil circuit 6.
When this fuel nozzle work, under the operating mode of all main combustion stage work, fuel oil enters main combustion stage fuel oil by fuel manifold and is in charge of 9, flows into and often opens oil circuit 5 through controlling organization 7, enters the first oil collecting ring 3, and passes through first group of spout 1 to combustion zone fuel feeding.In the time that fuel flow is increased to a certain value, the pressure that check valve 8 bears is opened after reaching design load, and controlled oil circuit 6 is in charge of 9 UNICOMs with fuel oil, and fuel oil enters the second oil collecting ring 4, by second group of spout 2 to combustion zone fuel feeding.
Preferably, the quantity of often opening the spout 1 of oil circuit 5 is more than 4, for example 4-8.
Preferably, the quantity of the spout 2 of the controlled oil circuit 6 in every road is more than 4, for example 4-8.
Preferably, often open the spout of oil circuit 5 and the spout of controlled oil circuit 6 from the horizontal by 30-90 degree angle, and incline direction is identical with fuel flow direction.That is to say, direction that each spout is advanced towards fuel oil, tilt away from the direction of often opening oil circuit 5 and controlled oil circuit 6.
Preferably, often open a part of spout in the spout of oil circuit 5 and the spout of controlled oil circuit 6 radially to inner opening, and radially outward opening of another part spout makes fuel oil more even by the injection of each spout, realizes better atomizing effect.
In fuel nozzle of the present utility model, adopt mechanical-hydraulic valve to realize grading control, reduced the difficulty of control system.By mechanical-hydraulic valve being set in fuel nozzle assembly porch, fuel oil in main combustion stage nozzle is divided into two-way, when fuel flow is less, Jin You mono-road fuel feed, the now fuel oil part spout on main combustion stage nozzle of flowing through, because circulation area is restricted, fuel pressure drop can maintain rational value.After fuel flow increases, valve opening, the second road fuel feed, now the fuel oil whole spouts on main combustion stage nozzle of flowing through.
Fuel nozzle of the present utility model is applied in the main combustion stage of fractional combustion chamber, center, can bring following beneficial effect:
1. the fuel-injection pressure that has improved combustion chamber classification dotted state, has ensured atomizing effect, thereby improves efficiency of combustion and disposal of pollutants;
2. this patent is nozzle interior classification, has therefore ensured the fuel flow equilibrium between each nozzle, thereby has improved combustor exit Temperature Distribution;
3. this patent adopts mechanical hydraulic unit, realizes the automatic adjusting of port fuel flow, and because the circulation area of main combustion stage spout is variable value, can make fuel nozzle within the scope of fuel flow, work widely.
Below described preferred embodiment of the present utility model in detail, but it will be appreciated that, after having read above-mentioned instruction content of the present utility model, those skilled in the art can make various changes or modifications the utility model.These equivalent form of values fall within the application's appended claims limited range equally.
Claims (8)
1. one kind is applied to the fuel nozzle of fractional combustion chamber, aero-engine center, described combustion chamber is provided with main combustion stage and pre-combustion grade, it is characterized in that: described fuel nozzle is provided with jet stem, many group spouts, many group oil collecting rings and controlling organization, in described jet stem, be provided with and often open oil circuit and controlled oil circuit, the described oil circuit of often opening is communicated with one group of oil collecting ring fluid, described controlled oil circuit is communicated with other group oil collecting ring fluid, described controlling organization is divided into multichannel for the fuel oil of main combustion stage is in charge of to the fuel oil providing, one road flows to the described oil circuit of often opening, all the other roads controllably flow to described controlled oil circuit.
2. fuel nozzle according to claim 1, is characterized in that, described controlling organization is provided with check valve, described check valve be placed in that described fuel oil is in charge of and described controlled oil circuit between, for controlling the connection of described controlled oil circuit and closing.
3. fuel nozzle according to claim 2, it is characterized in that, described check valve comprises valve pocket, in described valve pocket, be provided with spring and valve plug, make the pressure that bears when described check valve hour, described valve plug is valve-off under the effect of described spring, thereby close described controlled oil circuit, and the pressure bearing at described check valve is while exceeding certain threshold value, valve opening, thus open described controlled oil circuit.
4. fuel nozzle according to claim 1, it is characterized in that, described fuel nozzle is provided with two groups of spouts and two groups of oil collecting rings, first group of spout is connected with the first oil collecting ring, second group of spout is connected with the second oil collecting ring, and the described oil circuit of often opening is connected with the first oil collecting ring, and described controlled oil circuit is connected with described the second oil collecting ring.
5. fuel nozzle according to claim 1, is characterized in that, the quantity of the described spout of often opening oil circuit is 4-8.
6. fuel nozzle according to claim 1, is characterized in that, the quantity of the spout of the controlled oil circuit in every road is 4-8.
7. fuel nozzle according to claim 1, is characterized in that, the described spout of oil circuit and the spout of described controlled oil circuit often opened be from the horizontal by 30-90 degree, and along tilting away from the described direction of often opening oil circuit and described controlled oil circuit.
8. fuel nozzle according to claim 7, is characterized in that, describedly often opens a part of spout in the spout of oil circuit and the spout of described controlled oil circuit radially to inner opening, and radially outward opening of another part spout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420220056.3U CN203928003U (en) | 2014-04-30 | 2014-04-30 | Be applied to the fuel nozzle of fractional combustion chamber, aero-engine center |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420220056.3U CN203928003U (en) | 2014-04-30 | 2014-04-30 | Be applied to the fuel nozzle of fractional combustion chamber, aero-engine center |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203928003U true CN203928003U (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420220056.3U Expired - Lifetime CN203928003U (en) | 2014-04-30 | 2014-04-30 | Be applied to the fuel nozzle of fractional combustion chamber, aero-engine center |
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| Country | Link |
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| CN (1) | CN203928003U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106500130A (en) * | 2016-10-08 | 2017-03-15 | 中国科学院工程热物理研究所 | A kind of three-level layered portion lean premixed combustor of main combustion stage fuel-firing preheating prevapourising |
| CN107883404A (en) * | 2016-09-30 | 2018-04-06 | 中国航发商用航空发动机有限责任公司 | Fuel nozzle, core engine and turbogenerator |
| CN108916911A (en) * | 2018-04-27 | 2018-11-30 | 北京航空航天大学 | A kind of pre-combustion grade uses the center classification low emission combustor head of pre- diaphragm plate structure |
| CN112146125A (en) * | 2019-06-27 | 2020-12-29 | 中国航发商用航空发动机有限责任公司 | Fuel nozzle, combustion chamber, gas turbine and method for preventing coking of fuel in fuel nozzle |
| CN114763912A (en) * | 2021-01-12 | 2022-07-19 | 中国航发商用航空发动机有限责任公司 | Fuel nozzle, combustion chamber and gas turbine engine |
-
2014
- 2014-04-30 CN CN201420220056.3U patent/CN203928003U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107883404A (en) * | 2016-09-30 | 2018-04-06 | 中国航发商用航空发动机有限责任公司 | Fuel nozzle, core engine and turbogenerator |
| CN107883404B (en) * | 2016-09-30 | 2019-11-01 | 中国航发商用航空发动机有限责任公司 | Fuel nozzle, core engine and turbogenerator |
| CN106500130A (en) * | 2016-10-08 | 2017-03-15 | 中国科学院工程热物理研究所 | A kind of three-level layered portion lean premixed combustor of main combustion stage fuel-firing preheating prevapourising |
| CN108916911A (en) * | 2018-04-27 | 2018-11-30 | 北京航空航天大学 | A kind of pre-combustion grade uses the center classification low emission combustor head of pre- diaphragm plate structure |
| CN108916911B (en) * | 2018-04-27 | 2019-12-03 | 北京航空航天大学 | A kind of pre-combustion grade uses the center classification low emission combustor head of pre- diaphragm plate structure |
| CN112146125A (en) * | 2019-06-27 | 2020-12-29 | 中国航发商用航空发动机有限责任公司 | Fuel nozzle, combustion chamber, gas turbine and method for preventing coking of fuel in fuel nozzle |
| CN114763912A (en) * | 2021-01-12 | 2022-07-19 | 中国航发商用航空发动机有限责任公司 | Fuel nozzle, combustion chamber and gas turbine engine |
| CN114763912B (en) * | 2021-01-12 | 2023-08-25 | 中国航发商用航空发动机有限责任公司 | Fuel nozzle, combustion chamber and gas turbine engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 200241 Minhang District Lianhua Road, Shanghai, No. 3998 Patentee after: AECC COMMERCIAL AIRCRAFT ENGINE Co.,Ltd. Address before: 201108 Shanghai city Minhang District Lotus Road No. 3998 Patentee before: AVIC Commercial Aircraft Engine Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141105 |