CN204593454U - Head of combustion chamber structure - Google Patents
Head of combustion chamber structure Download PDFInfo
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- CN204593454U CN204593454U CN201520050736.XU CN201520050736U CN204593454U CN 204593454 U CN204593454 U CN 204593454U CN 201520050736 U CN201520050736 U CN 201520050736U CN 204593454 U CN204593454 U CN 204593454U
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- duty
- nozzle
- head
- combustion chamber
- main burner
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Abstract
The utility model relates to gas turbine technology field, specifically disclose a kind of head of combustion chamber structure, the nozzle on duty comprising cover cap and be located in described cover cap and main burner, described cover cap comprises shell and is located at the baffle plate of described housing front, described shell is provided with multiple air intlet, described baffle plate respectively with described shell, nozzle on duty is connected with main burner, described nozzle on duty is coaxial with described cover cap, described nozzle on duty comprises nozzle straight section on duty and expansion segment, described main burner is multiple and is evenly arranged in described nozzle periphery on duty, described main burner comprises main burner straight section and changeover portion, the downstream of described baffle plate is provided with current limiting plate, described current limiting plate respectively with described shell, nozzle on duty is connected with main burner, the outside of described expansion segment is provided with multiple evenly distributed deflector, the front end of described deflector is connected with described current limiting plate.The utility model achieves and more effectively controls gas-turbine combustion chamber head cold gas, improves the cooling effectiveness of head.
Description
Technical field
The utility model relates to gas turbine technology field, particularly relates to a kind of head of combustion chamber structure using the gas-turbine combustion chamber of gaseous fuel premixed combustion.
Background technology
Because the requirement of environmental protection is more and more stricter, in gas-turbine combustion chamber in recent years, use the mode of premixed combustion to reduce nitrogen oxide (NO more and more
x) discharge.
As shown in Figure 1, be a kind of in prior art head of combustion chamber structure of typical employing premixed combustion mode.Nozzle 1 on duty is arranged in center, multiple main burner 2 is arranged in around nozzle 1 on duty equably, main burner 2 all adopts premixed combustion mode to discharge with decreasing pollution thing, nozzle 1 on duty adopts diffusion combustion mode or premixed combustion mode, stable flame is formed in expansion segment 11, the kindling material generating premixed flame as main burner 2 uses, maintain premixed combustion thus, the temperature of premixed flame is generally at more than 1800K, expansion flame is generally at more than 2200K, because flame exists in expansion segment 11, need to carry out thermal protection to the expansion segment of nozzle, in order to ensure the life-span of nozzle 1 on duty, except except expansion segment 11 internal face spraying heat insulating coat, need to use cold air to cool toward contact.
In order to reduce the discharge of nitrogen oxide, advanced lean premixed combustor fuel has been pre-mixed the air of maximum quantity, so only have little air can be used for cooling.The utilization ratio how improving cold air is the major issue that advanced premixed combustion combustion chamber will solve.In the head of combustion chamber structure of a kind of typical employing premixed combustion mode of Fig. 1 display, cooling scheme of the prior art has three significant problems: one, and cold air carrys out coolant expansion section 11 by the mode that convection current cools, and cooling effectiveness is lower; Its two, air enters into head construction walking around cover cap 3, and has the larger pressure loss in the process of the inner random flowing of cover cap 3, reduces cooling effectiveness further; Its three, this cooling structure can not effectively controlled cooling model gas import and export area and can not the flow of controlled cooling model gas effectively, thus cause the waste of cold gas.Generally speaking, also there is larger room for improvement in cooling scheme of the prior art.
Utility model content
(1) technical problem that will solve
The purpose of this utility model is to provide a kind of head of combustion chamber structure, to realize more effectively controlling gas-turbine combustion chamber head cold gas, thus improves the cooling effectiveness of gas-turbine combustion chamber head.
(2) technical scheme
In order to solve the problems of the technologies described above, the utility model provides a kind of head of combustion chamber structure, comprises cover cap and the nozzle on duty that is located in described cover cap and main burner; Described cover cap comprises shell and is located at the baffle plate of described housing front, described shell is provided with multiple air intlet, described baffle plate is connected with described shell, nozzle on duty and main burner respectively, described nozzle on duty is coaxial with described cover cap, described nozzle on duty comprises nozzle straight section on duty and expansion segment, described main burner is multiple and is evenly arranged in described nozzle periphery on duty, and described main burner comprises main burner straight section and changeover portion; The downstream of described baffle plate is provided with current limiting plate, and described current limiting plate is connected with described shell, nozzle on duty and main burner respectively, and the outside of described expansion segment is provided with multiple evenly distributed deflector, and the front end of described deflector is connected with described current limiting plate.
Preferably, the front end of described deflector is provided with pod apertures.
Preferably, the angle of described pod apertures and axial direction is 10 ° ~ 50 °, and the direction of described pod apertures is identical with the eddy flow direction of described nozzle on duty.
Preferably, described expansion segment is provided with multiple evenly distributed diffusion cooling hole.
Preferably, the diameter of described diffusion cooling hole is 0.8mm ~ 1.5mm.
Preferably, described current limiting plate is provided with multiple metering holes.
Preferably, the diameter of described metering hole is 1mm ~ 5mm.
Preferably, described current limiting plate is greater than 50% of described expansion segment axial length to the distance of the outlet of described nozzle on duty.
Preferably, the axial distance of the rear end of described deflector and the outlet of described nozzle on duty or main burner is 0 ~ 20mm.
Preferably, the gross area of described air intlet is greater than the gross area sum of described metering hole and described pod apertures, and the gross area of described metering hole accounts for 10% ~ 40% of the gross area of described air intlet.
(3) beneficial effect
Head of combustion chamber structure of the present utility model by introduce current limiting plate, deflector, with the pod apertures of eddy flow angle and diffusion cooling hole etc., achieve and gas-turbine combustion chamber head cold gas is more effectively controlled, improve the cooling effectiveness of gas-turbine combustion chamber head.It has the following advantages: introduce air by the air intlet on cover cap shell and can reduce the pressure loss compared to traditional front end airflow mode; By cold gas can be impelled with the pod apertures of eddy flow angle to form spiralling, thus extend cold gas in the time of staying on expansion segment surface, strengthen cooling; On the other hand, the diffusion cooling hole on expansion segment surface also can improve cooling effectiveness further; The introducing of current limiting plate also strengthens the control dynamic to cover cap air flow, reduces the pressure loss of cold air; By controlling pod apertures, the area of metering hole and diffusion cooling hole can realize, to the accurate control of cooling gas flow, avoiding the waste of cold gas.
Accompanying drawing explanation
Fig. 1 is the schematic cross-section of the head of combustion chamber structure adopting premixed combustion mode in prior art;
Fig. 2 is the schematic cross-section of the head of combustion chamber structure of the utility model embodiment;
Fig. 3 is the schematic perspective view of the head of combustion chamber structure of the utility model embodiment;
Fig. 4 is the partial enlarged drawing of the head of combustion chamber structure of the utility model embodiment.
In figure, 1: nozzle on duty; 2: main burner; 3: cover cap; 10: nozzle straight section on duty; 11: expansion segment; 13: diffusion cooling hole; 21: main burner straight section; 22: changeover portion; 31: shell; 32: baffle plate; 33: deflector; 34: current limiting plate; 35: air intlet; 36: pod apertures; 37: metering hole; 38: blow air outlet slit clearly.
Detailed description of the invention
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples for illustration of the utility model, but can not be used for limiting scope of the present utility model.
In description of the present utility model, it should be noted that, term " " center ", " longitudinal direction ", " transverse direction ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.Unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition the concrete meaning of above-mentioned term in the utility model can be understood.In addition, in description of the present utility model, except as otherwise noted, the implication of " multiple " is two or more.
As in Figure 2-4, the head of combustion chamber structure of the present embodiment comprises: cover cap 3 and the nozzle on duty 1 be located in cover cap and main burner 2.
Cover cap 3 comprises: shell 31 and be located at the baffle plate 32 of shell 31 front portion, and shell 31 is provided with multiple air intlet 35, and baffle plate 32 is tightly connected with the outer wall of shell 31, nozzle on duty 1 and main burner 2 respectively; Nozzle 1 on duty is coaxial with cover cap 3, is namely located at the center of cover cap 3, and nozzle 1 on duty comprises: nozzle straight section 10 on duty and expansion segment 11; Main burner 2 is multiple and is circumferentially evenly arranged in nozzle 1 on duty periphery, and main burner 2 comprises: main burner straight section 21 and changeover portion 22.
The downstream of baffle plate 32 is provided with current limiting plate 34, current limiting plate 34 is tightly connected with the outer wall of shell 31, nozzle on duty 1 and main burner 2 respectively and junction smoothly transits, the outside of expansion segment 11 is provided with multiple evenly distributed deflector 33, the front end of deflector 33 and current limiting plate 34 are tightly connected and junction smoothly transits, above-mentioned being tightly connected can avoid the waste of cold air, is smoothly connected and can reduces gas-flow resistance.In order to ensure that all high-temperature area of expansion segment 11 is cooled, the position of current limiting plate 34 can not too rearward, and current limiting plate 34 is greater than 50% of expansion segment 11 axial length to the distance of the outlet of nozzle 1 on duty.When deflector 33 is long, combustibility may be affected, during tempering, deflector 33 also may be burnt, so deflector 33 rear end and nozzle on duty 1 and main burner 2 outlet is in same axial location or before being in this axial location, if the too short part expansion segment 11 that has of deflector 33 can not get cooling, the axial distance of the rear end of deflector 33 and the outlet of nozzle on duty 1 or main burner 2 is 0 ~ 20mm.
As shown in Figure 4, the front end of deflector 33 is provided with pod apertures 36.Pod apertures 36 is 10 ° ~ 50 ° with the angle of axial direction, like this, cooling blast can form certain eddy flow after pod apertures 36, thus extend the time of staying of cold gas on expansion segment 11, the direction of pod apertures 36 is identical with the eddy flow direction of nozzle 1 on duty, can promote that cold gas againsts the flowing of expansion segment 11 wall after diffusion cooling hole 13, promote cooling effectiveness.
Expansion segment 11 is provided with the rectangular evenly distributed diffusion cooling hole 13 of multiple one-tenth, and diffusion cooling hole 13 is mainly positioned at the rear end of expansion segment 11.The diameter of diffusion cooling hole 13 is 0.8mm ~ 1.5mm.
Current limiting plate 34 is provided with multiple metering holes 37, and metering hole 37 is evenly distributed.The diameter of metering hole 37 is 1mm ~ 5mm.
The cavity that deflector 33 formed with expansion segment 11 is entered in order to reduce the pressure loss and ensure enough cold gas, the gross area of air intlet 35 is greater than the gross area sum of metering hole 37 and pod apertures 36, and the gross area of metering hole 37 accounts for 10% ~ 40% of the gross area of air intlet 35.
As shown in Figure 3, main burner 2 has gap with cover cap 3 and nozzle on duty 1 in junction, blows clearly air outlet slit 38, flowing out, playing the effect of blowing clearly, can prevent tempering or flame attach wall from the air going out metering hole 37 by blowing clearly air outlet slit 38.
The operation principle of the head of combustion chamber structure of the present embodiment: from the air of compressor when flowing in combustion chamber head, be divided into two parts, part enters into nozzle 1 on duty and main burner 2 and fuel blending, participate in burning directly, the cover cap 3 that another part is entered by the air intlet 35 above cover cap 3 is inner, an air part for cover cap 3 inside entered flows to cover cap 3 downstream by the metering hole 37 on current limiting plate 34, thus the gap between nozzle is blown clearly, prevent tempering, another part air flow in the chamber that expansion segment 11 and deflector 33 formed by pod apertures 36, and flow out via the diffusion cooling hole 13 on expansion segment 11, realize the cooling to expansion segment 11.
Head of combustion chamber structure of the present utility model by introduce current limiting plate, deflector, with the pod apertures of eddy flow angle and diffusion cooling hole etc., achieve and gas-turbine combustion chamber head cold gas is more effectively controlled, improve the cooling effectiveness of gas-turbine combustion chamber head.It has the following advantages: introduce air by the air intlet on cover cap shell and can reduce the pressure loss compared to traditional front end airflow mode; By cold gas can be impelled with the pod apertures of eddy flow angle to form spiralling, thus extend cold gas in the time of staying on expansion segment surface, strengthen cooling; On the other hand, the diffusion cooling hole on expansion segment surface also can improve cooling effectiveness further; The introducing of current limiting plate also strengthens the control dynamic to cover cap air flow, reduces the pressure loss of cold air; By controlling pod apertures, the area of metering hole and diffusion cooling hole can realize, to the accurate control of cooling gas flow, avoiding the waste of cold gas.
Embodiment of the present utility model provides for the purpose of example and description, and is not exhaustively or by the utility model be limited to disclosed form.Many modifications and variations are apparent for the ordinary skill in the art.Selecting and describing embodiment is in order to principle of the present utility model and practical application are better described, and enables those of ordinary skill in the art understand the utility model thus design the various embodiments with various amendment being suitable for special-purpose.
Claims (10)
1. a head of combustion chamber structure, is characterized in that, comprises cover cap and the nozzle on duty that is located in described cover cap and main burner; Described cover cap comprises shell and is located at the baffle plate of described housing front, described shell is provided with multiple air intlet, described baffle plate is connected with described shell, nozzle on duty and main burner respectively, described nozzle on duty is coaxial with described cover cap, described nozzle on duty comprises nozzle straight section on duty and expansion segment, described main burner is multiple and is evenly arranged in described nozzle periphery on duty, and described main burner comprises main burner straight section and changeover portion; The downstream of described baffle plate is provided with current limiting plate, and described current limiting plate is connected with described shell, nozzle on duty and main burner respectively, and the outside of described expansion segment is provided with multiple evenly distributed deflector, and the front end of described deflector is connected with described current limiting plate.
2. head of combustion chamber structure according to claim 1, is characterized in that, the front end of described deflector is provided with pod apertures.
3. head of combustion chamber structure according to claim 2, is characterized in that, the angle of described pod apertures and axial direction is 10 ° ~ 50 °, and the direction of described pod apertures is identical with the eddy flow direction of described nozzle on duty.
4. head of combustion chamber structure according to claim 2, is characterized in that, described expansion segment is provided with multiple evenly distributed diffusion cooling hole.
5. head of combustion chamber structure according to claim 4, is characterized in that, the diameter of described diffusion cooling hole is 0.8mm ~ 1.5mm.
6. head of combustion chamber structure according to claim 4, is characterized in that, described current limiting plate is provided with multiple metering holes.
7. head of combustion chamber structure according to claim 6, is characterized in that, the diameter of described metering hole is 1mm ~ 5mm.
8. according to the head of combustion chamber structure in claim 1-7 described in any one, it is characterized in that, described current limiting plate is greater than 50% of described expansion segment axial length to the distance of the outlet of described nozzle on duty.
9. head of combustion chamber structure according to claim 8, is characterized in that, the axial distance of the rear end of described deflector and the outlet of described nozzle on duty or main burner is 0 ~ 20mm.
10. head of combustion chamber structure according to claim 6, it is characterized in that, the gross area of described air intlet is greater than the gross area sum of described metering hole and described pod apertures, and the gross area of described metering hole accounts for 10% ~ 40% of the gross area of described air intlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520050736.XU CN204593454U (en) | 2015-01-23 | 2015-01-23 | Head of combustion chamber structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520050736.XU CN204593454U (en) | 2015-01-23 | 2015-01-23 | Head of combustion chamber structure |
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| Publication Number | Publication Date |
|---|---|
| CN204593454U true CN204593454U (en) | 2015-08-26 |
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|---|---|---|---|
| CN201520050736.XU Active CN204593454U (en) | 2015-01-23 | 2015-01-23 | Head of combustion chamber structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338084A (en) * | 2016-11-21 | 2017-01-18 | 深圳智慧能源技术有限公司 | The gas turbine combustion chamber |
-
2015
- 2015-01-23 CN CN201520050736.XU patent/CN204593454U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338084A (en) * | 2016-11-21 | 2017-01-18 | 深圳智慧能源技术有限公司 | The gas turbine combustion chamber |
| CN106338084B (en) * | 2016-11-21 | 2018-11-20 | 深圳智慧能源技术有限公司 | Gas-turbine combustion chamber |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Double-pre-film pneumatic nebulization low pollution combustor head structure Effective date of registration: 20161104 Granted publication date: 20150826 Pledgee: Tsinghua Holdings Co., Ltd. Pledgor: Beijing Huatsing Gas Turbine & IGCC Technology Co., Ltd. Registration number: 2016990000853 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20191211 Granted publication date: 20150826 Pledgee: Tsinghua Holdings Co., Ltd. Pledgor: Beijing Huatsing Gas Turbine & IGCC Technology Co., Ltd. Registration number: 2016990000853 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191223 Address after: 102209 Beijing Changping District in the future of the national electric investment group Park in the future science city south of Beijing Patentee after: China United heavy-duty gas turbine technology Co., Ltd. Address before: 100084, Beijing, Haidian District science and Technology Park, Tsinghua Science and technology building, block C, 10 Patentee before: Beijing Huatsing Gas Turbine & IGCC Technology Co., Ltd. |
|
| TR01 | Transfer of patent right |