CN204084460U - A kind of gas-turbine combustion chamber head distribution cooling structure - Google Patents
A kind of gas-turbine combustion chamber head distribution cooling structure Download PDFInfo
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- CN204084460U CN204084460U CN201420376454.4U CN201420376454U CN204084460U CN 204084460 U CN204084460 U CN 204084460U CN 201420376454 U CN201420376454 U CN 201420376454U CN 204084460 U CN204084460 U CN 204084460U
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Abstract
The utility model relates to gas turbine technology field, particularly relates to a kind of gas-turbine combustion chamber head distribution cooling structure.This gas-turbine combustion chamber head distribution cooling structure comprises the transition vertex of a cone, distribution cover plate, outer ring plate and inner ring plate, the transition vertex of a cone is evenly equipped with in the circumferential and is vented fenestra more, the position that the inwall side of the transition vertex of a cone is relative with air film hole is provided with gas shock plate, position corresponding with air film hole on distribution cover plate offers many row's cover plate through holes, like this, the cooling blast entered in distribution cavity can pass through the air film hole on the transition vertex of a cone, enter inside the transition vertex of a cone, then impact on gas shock plate, under the guiding of gas shock plate, thus one deck cold gas rete is formed on transition vertex of a cone inner arm, and then strengthen and improve the cooling effect of the transition vertex of a cone.
Description
Technical field
The utility model relates to gas turbine technology field, particularly relates to a kind of gas-turbine combustion chamber head distribution cooling structure.
Background technology
At present, heavy duty gas turbine ring-pipe type head of combustion chamber comprises the parts such as distribution cover plate and the transition vertex of a cone, wherein distribution cover plate plays the function of head distribution, the transition vertex of a cone is near primary zone, contact with primary zone high-temperature gas, be subject to the radiation heat transfer impact that primary zone is strong, wall surface temperature is very high, is a high-temperature component simultaneously.Concerning single injector combustion chamber, the transition vertex of a cone is near the combustion gas from nozzle ejection, and combustion gas mixes with nozzle dilution air, may produce curling and be attached to the phenomenon of the transition vertex of a cone, at suitable temperature and equivalent proportion condition, combustion gas can be burnt, the ablation transition vertex of a cone, affects chamber performance.Therefore, very high to the combined cooling structure substantive requirements of form of head of combustion chamber distribution cover plate and the transition vertex of a cone, need under minimum cooling air volume requires, realize cooling target.
In prior art, the small hole injection of refrigerating gas autogamy air cover board out, has certain impinging cooling effect to the transition vertex of a cone, but the stronger position of impinging cooling effect is only near the less region of transition vertex of a cone center spacing.At present, dozen circular hole is generally adopted to the cooling structure of the transition vertex of a cone.For this Cooling Holes, air-flow ejects from the transition vertex of a cone, can intercept the contact of hot combustion gas and transition vertex of a cone wall to a certain extent, but punch density is difficult to grasp, the situation that hole is closeer, aperture needs to control within a certain size, Gu wall construction intensity is also difficult to ensure; When hole is more sparse, good cooling effect cannot be reached; Meanwhile, because the methods for cooling beating circular hole does not form effective adherent air film protection to the transition vertex of a cone, therefore, cooling effect is also bad.
But, the development trend of current combustion room is that outlet temperature will raise further, but can not significantly increase the cooling tolerance of flame tube wall and head, may remain unchanged or reduce on the contrary, therefore need to develop the higher cooling structure of cooling effectiveness, and existing head of combustion chamber distribution cooling structure is difficult to realize good cooling effect.
Therefore, for above deficiency, the utility model provides a kind of gas-turbine combustion chamber head distribution cooling structure.
Utility model content
(1) technical problem that will solve
The purpose of this utility model is to provide a kind of gas-turbine combustion chamber head distribution cooling structure and wall forms air film layer to make cold gas within it entering after in the transition vertex of a cone, improves the cooling effect to the transition vertex of a cone.
(2) technical scheme
In order to solve the problems of the technologies described above, the utility model provides a kind of gas-turbine combustion chamber head distribution cooling structure, it comprises the transition vertex of a cone, distribution cover plate, outer ring plate and inner ring plate, outer ring plate and inner ring plate are all coaxially set on the transition vertex of a cone with the transition vertex of a cone, outer ring plate is positioned at the outside of inner ring plate, distribution cover plate arranges between outer ring plate and inner ring plate, with with outer ring plate, inner ring plate and the transition vertex of a cone form distribution cavity, and the axes normal of distribution cover plate and the transition vertex of a cone, the transition vertex of a cone is evenly equipped with in the circumferential and is vented fenestra more, the position that the inwall side of the transition vertex of a cone is relative with air film hole is provided with gas shock plate, position corresponding with air film hole on distribution cover plate offers many row's cover plate through holes.
Wherein, the described transition vertex of a cone is a uniform row of horizontal Cooling Holes in the circumferential near the region of inner ring plate, and the center line of this horizontal Cooling Holes and the axis being parallel of the transition vertex of a cone, row's cover plate through hole is offered in position corresponding with horizontal Cooling Holes on distribution cover plate.
Wherein, the center line of described horizontal Cooling Holes and the normal direction angle of transition vertex of a cone wall are 30 ° ~ 60 °.
Wherein, described air film hole is circular, and the aperture of air film hole is 2.0 ~ 5.0mm.
Wherein, two adjacent exhaust fenestras are 10.0 ~ 30.0mm in the distance on transition vertex of a cone surface.
Wherein, the circumferential pitch of holes of described air film hole is 10.0 ~ 40.0mm; The center line of described air film hole and the normal direction angle of transition vertex of a cone wall are 0 ° ~ 20 °.
Wherein, the length of described gas shock plate is 3.0 ~ 8.0mm.
Wherein, described gas shock plate and transition vertex of a cone wall angle are 0 ° ~ 35 °.
Wherein, center line and the distribution cover plate wall angle of the cover plate through hole on described distribution cover plate are 0 ° ~ 20 °.
Wherein, radial spacing 8.0 ~ 25.0mm between two row's cover plate through holes adjacent on described distribution cover plate, often arranges cover plate through hole and is uniformly distributed circumferentially, and cover plate through hole pitch of holes 16.0 ~ 40.0mm circumferentially.
(3) beneficial effect
Technique scheme tool of the present utility model has the following advantages: in the gas-turbine combustion chamber head distribution cooling structure that the utility model provides, the transition vertex of a cone is evenly equipped with in the circumferential and is vented fenestra more, the position that the inwall side of the transition vertex of a cone is relative with air film hole is provided with gas shock plate, position corresponding with air film hole on distribution cover plate offers many row's cover plate through holes, like this, the cooling blast entered in distribution cavity can pass through the air film hole on the transition vertex of a cone, enter inside the transition vertex of a cone, then impact on gas shock plate, under the guiding of gas shock plate, thus one deck cold gas rete is formed on transition vertex of a cone inner arm, and then strengthen and improve the cooling effect of the transition vertex of a cone.
Accompanying drawing explanation
Fig. 1 is the partial perspective view of the utility model embodiment gas-turbine combustion chamber head distribution cooling structure;
Fig. 2 is the part sectioned view of the utility model embodiment gas-turbine combustion chamber head distribution cooling structure;
Fig. 3 is the profile of the transition vertex of a cone in the utility model embodiment gas-turbine combustion chamber head distribution cooling structure;
Fig. 4 is the part sectioned view of the utility model embodiment distribution cover plate.
In figure, 1: distribution cover plate; 2: outer ring plate; 3: inner ring plate; 4: the transition vertex of a cone; 5: gas shock plate; 6: distribution cavity; 7: cover plate through hole; 8: air film hole; 9: horizontal Cooling Holes.
Detailed description of the invention
Below in conjunction with drawings and Examples, detailed description of the invention of the present utility model is described in further detail.Following examples for illustration of the utility model, but are not used for limiting scope of the present utility model.
In description of the present utility model, it should be noted that, term " on ", D score, " top ", " end ", " interior ", " outward " " indulge ", " horizontal stroke ", etc. the orientation of instruction or position relationship be based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of the device of instruction or hint 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.Axially referring to the direction of principal axis of combustion chamber flame drum during the utility model describes, is also X-direction (as shown in Figure 2).
As depicted in figs. 1 and 2, the gas-turbine combustion chamber head distribution cooling structure that the utility model provides comprises the transition vertex of a cone 4, distribution cover plate 1, outer ring plate 2 and inner ring plate 3, outer ring plate 2 and inner ring plate 3 are all coaxially set on the transition vertex of a cone 4 with the transition vertex of a cone 4, outer ring plate 2 is positioned at the outside of inner ring plate 3, distribution cover plate 1 arranges between outer ring plate 2 and inner ring plate 3, with with outer ring plate 2, inner ring plate 3 and the transition vertex of a cone 4 form distribution cavity 6, and the axes normal of distribution cover plate 1 and the transition vertex of a cone 4, the transition vertex of a cone 4 is evenly equipped with four exhaust fenestras 8 in the circumferential, the inwall side of the transition vertex of a cone 4 be often vented the relative position of fenestra 8 and be provided with a circle gas shock plate 5, position corresponding with air film hole 8 on distribution cover plate 1 offers four row's cover plate through holes 7.Wherein, on inner ring plate 3 and outer ring plate 2 without aperture and other leakage structure.
In technique scheme, cold gas (from water conservancy diversion lining adverse current to the gas of head) enters into distribution cover plate 1 and outer ring plate 2 through the cover plate through hole 7 distribution cover plate 1, in the distribution cavity 6 that inner ring plate 3 and the transition vertex of a cone 4 are formed, because the position of the cover plate through hole 7 on distribution cover plate 1 is corresponding with the position of air film hole 8 on the transition vertex of a cone 4, enter cooling blast in distribution cavity 6 while to the transition vertex of a cone 4 impinging cooling, the air film hole 8 on the transition vertex of a cone 4 can be passed through, enter inside the transition vertex of a cone 4, then impact on gas shock plate 5, under the guiding of gas shock plate 5, thus one deck cold gas rete is formed on the transition vertex of a cone 4 inner arm, the cooling effect of the transition vertex of a cone 4 can be strengthened, this cold gas so enter main combustion zone burning.
As shown in Figures 2 and 3, preferably, the transition vertex of a cone 4 near the region of inner ring plate 3 also a uniform row of horizontal Cooling Holes 9, the center line of horizontal Cooling Holes 9 and the normal direction angle theta of the transition vertex of a cone 4 wall in the circumferential
2be generally 30 ° ~ 60 °, the center line of this horizontal Cooling Holes 9 and the axis being parallel of the transition vertex of a cone 4, row's cover plate through hole 7 is offered in position corresponding with horizontal Cooling Holes 9 on distribution cover plate 1.
Usually, the transition vertex of a cone 4 center is fuel gas cyclone, fuel enters primary zone with the expansion injection of certain eddy flow angle, curling to the transition vertex of a cone 4 of fuel gas can be there is under certain condition, and be attached on the transition vertex of a cone 4, under uniform temperature and equivalent proportion condition, this part deposited fuel is burnt, can the ablation transition vertex of a cone 4.And in the utility model, cold gas is by distribution cover plate 1 leaning on after the cover plate through hole 7 of inner ring plate 3, enter distribution cavity 6, then along the transition vertex of a cone 4 axially across the horizontal Cooling Holes 9 on the transition vertex of a cone 4, form horizontal cold gas, the blending of this horizontal direction cold gas and fuel gas is acute angle, and fuel gas can be stoped to adhere to the excessive vertex of a cone, make fuel gas enter primary zone, and then improve the temperature regime inside the excessive vertex of a cone.
Particularly, the air film hole 8 on the transition vertex of a cone 4 is circular, and the aperture of air film hole 8 is 2.0 ~ 5.0mm; Two adjacent exhaust fenestras 8 are 10.0 ~ 30.0mm in the distance on the transition vertex of a cone 4 surface; The circumferential pitch of holes of air film hole 8 is 10.0 ~ 40.0mm.Such size arranges the structural strength that can ensure the transition vertex of a cone 4 on the one hand, has the cooling effect that can ensure the transition vertex of a cone 4 on the other hand.
Wherein, the center line of air film hole 8 and the normal direction angle theta of the transition vertex of a cone 4 wall
3it is 0 ° ~ 20 °.Such angle can ensure that cold gas is by can directly impact on gas shock plate 5 after the air film hole 8 on the transition vertex of a cone 4, and then forms air film layer on the transition vertex of a cone 4 inwall.
Particularly, the length L of gas shock plate 5 is 3.0 ~ 8.0mm; Gas shock plate 5 and the transition vertex of a cone 4 wall angle theta
4it is 0 ° ~ 35 °.Such vibrational power flow can adapt to the air film hole 8 of different angles, and then can form uniform air film layer on the transition vertex of a cone 4 inwall.
As shown in Figure 4, the center line of the cover plate through hole 7 on described distribution cover plate 1 and distribution cover plate 1 wall angle theta
1be 0 ° ~ 20 °, to adapt to the angle of air film hole 8 on the transition vertex of a cone 4, thus cold gas can be made to enter inside the transition vertex of a cone 4 swimmingly; Radial spacing 8.0 ~ 25.0mm between two row's cover plate through holes adjacent on distribution cover plate, often arrange cover plate through hole to be uniformly distributed circumferentially, and cover plate through hole pitch of holes 16.0 ~ 40.0mm circumferentially, cover plate through hole 7 one aspect on distribution cover plate 1 plays assignment of traffic regulating action, form gas shock effect on the one hand, impinging cooling is carried out to the transition vertex of a cone 4.
Usually, the transition vertex of a cone 4 is 20 ° ~ 50 ° angles with axis, to regulate primary zone flame location and form.
In sum, in the gas-turbine combustion chamber head distribution cooling structure that the utility model provides, the transition vertex of a cone 4 is evenly equipped with four exhaust fenestras 8 in the circumferential, the inwall side of the transition vertex of a cone 4 be often vented the relative position of fenestra 8 one circle gas shock plate 5 be set, position corresponding with air film hole 8 on distribution cover plate 1 offers four row's cover plate through holes 7, like this, the cooling blast entered in distribution cavity 6 can pass through the air film hole 8 on the transition vertex of a cone 4, enter inside the transition vertex of a cone 4, then impact on gas shock plate 5, under the guiding of gas shock plate 5, thus one deck cold gas rete is formed on the transition vertex of a cone 4 inner arm, and then strengthen and improve the cooling effect of the transition vertex of a cone 4, to adapt to the trend that combustor exit temperature raises, the transition vertex of a cone 4 is an also uniform row of horizontal Cooling Holes 9 in the circumferential near the region of inner ring plate 3, gas in distribution cavity 6 forms horizontal cold gas through this horizontal Cooling Holes 9, the cold gas of this horizontal direction can stop fuel gas to adhere to the excessive vertex of a cone, make fuel gas enter primary zone, and then improve the temperature regime inside the excessive vertex of a cone.
The above is only preferred embodiment of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model know-why; can also make some improvement and modification, these improve and modification also should be considered as protection domain of the present utility model.
Claims (10)
1. a gas-turbine combustion chamber head distribution cooling structure, it is characterized in that: it comprises the transition vertex of a cone, distribution cover plate, outer ring plate and inner ring plate, outer ring plate and inner ring plate are all coaxially set on the transition vertex of a cone with the transition vertex of a cone, outer ring plate is positioned at the outside of inner ring plate, distribution cover plate arranges between outer ring plate and inner ring plate, with with outer ring plate, inner ring plate and the transition vertex of a cone form distribution cavity, and the axes normal of distribution cover plate and the transition vertex of a cone, the transition vertex of a cone is evenly equipped with in the circumferential and is vented fenestra more, the position that the inwall side of the transition vertex of a cone is relative with air film hole is provided with gas shock plate, position corresponding with air film hole on distribution cover plate offers many row's cover plate through holes.
2. gas-turbine combustion chamber head distribution cooling structure according to claim 1, it is characterized in that: the described transition vertex of a cone is a uniform row of horizontal Cooling Holes in the circumferential near the region of inner ring plate, the center line of this horizontal Cooling Holes and the axis being parallel of the transition vertex of a cone, row's cover plate through hole is offered in position corresponding with horizontal Cooling Holes on distribution cover plate.
3. gas-turbine combustion chamber head distribution cooling structure according to claim 2, is characterized in that: the center line of described horizontal Cooling Holes and the normal direction angle of transition vertex of a cone wall are 30 ° ~ 60 °.
4. gas-turbine combustion chamber head distribution cooling structure according to claim 1, is characterized in that: described air film hole is for circular, and the aperture of air film hole is 2.0 ~ 5.0mm.
5. gas-turbine combustion chamber head distribution cooling structure according to claim 4, is characterized in that: two adjacent exhaust fenestras are 10.0 ~ 30.0mm in the distance on transition vertex of a cone surface.
6. gas-turbine combustion chamber head distribution cooling structure according to claim 1, is characterized in that: the circumferential pitch of holes of described air film hole is 10.0 ~ 40.0mm; The center line of described air film hole and the normal direction angle of transition vertex of a cone wall are 0 ° ~ 20 °.
7. gas-turbine combustion chamber head distribution cooling structure according to claim 1, is characterized in that: the length of described gas shock plate is 3.0 ~ 8.0mm.
8. gas-turbine combustion chamber head distribution cooling structure according to claim 1, is characterized in that: described gas shock plate and transition vertex of a cone wall angle are 0 ° ~ 35 °.
9. gas-turbine combustion chamber head distribution cooling structure according to claim 1, is characterized in that: center line and the distribution cover plate wall angle of the cover plate through hole on described distribution cover plate are 0 ° ~ 20 °.
10. gas-turbine combustion chamber head distribution cooling structure according to claim 1, it is characterized in that: radial spacing 8.0 ~ 25.0mm between two row's cover plate through holes adjacent on described distribution cover plate, often arrange cover plate through hole to be uniformly distributed circumferentially, and cover plate through hole pitch of holes 16.0 ~ 40.0mm circumferentially.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420376454.4U CN204084460U (en) | 2014-07-08 | 2014-07-08 | A kind of gas-turbine combustion chamber head distribution cooling structure |
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| CN201420376454.4U CN204084460U (en) | 2014-07-08 | 2014-07-08 | A kind of gas-turbine combustion chamber head distribution cooling structure |
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| CN204084460U true CN204084460U (en) | 2015-01-07 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109307577A (en) * | 2018-08-24 | 2019-02-05 | 北京航空航天大学 | A kind of air-cooling apparatus for high-temperature vibrating test |
| CN114110657A (en) * | 2021-11-11 | 2022-03-01 | 中国航发贵阳发动机设计研究所 | Cooling structure for head of flame tube of combustion chamber of middle-thrust aircraft engine |
| CN114484497A (en) * | 2021-11-30 | 2022-05-13 | 北京动力机械研究所 | Cooling mixing hopper of compact integrated design |
| CN115507386A (en) * | 2021-06-07 | 2022-12-23 | 通用电气公司 | Combustor for a gas turbine engine |
-
2014
- 2014-07-08 CN CN201420376454.4U patent/CN204084460U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109307577A (en) * | 2018-08-24 | 2019-02-05 | 北京航空航天大学 | A kind of air-cooling apparatus for high-temperature vibrating test |
| CN115507386A (en) * | 2021-06-07 | 2022-12-23 | 通用电气公司 | Combustor for a gas turbine engine |
| CN114110657A (en) * | 2021-11-11 | 2022-03-01 | 中国航发贵阳发动机设计研究所 | Cooling structure for head of flame tube of combustion chamber of middle-thrust aircraft engine |
| CN114484497A (en) * | 2021-11-30 | 2022-05-13 | 北京动力机械研究所 | Cooling mixing hopper of compact integrated design |
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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: Head distribution cooling structure for combustion chamber of gas turbine Effective date of registration: 20161104 Granted publication date: 20150107 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: 20150107 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 |