CN208536043U - A kind of inner tube structure suitable for gas turbine reflux tube-type combustion chamber - Google Patents
A kind of inner tube structure suitable for gas turbine reflux tube-type combustion chamber Download PDFInfo
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- CN208536043U CN208536043U CN201821054577.0U CN201821054577U CN208536043U CN 208536043 U CN208536043 U CN 208536043U CN 201821054577 U CN201821054577 U CN 201821054577U CN 208536043 U CN208536043 U CN 208536043U
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Abstract
The utility model discloses a kind of inner tube structures suitable for gas turbine reflux tube-type combustion chamber, the head members of inner cylinder bottom part body are arranged in including an inner cylinder main body and one, inner cylinder main body includes the multiple tower units sequentially coaxially welded from top to bottom, distribution aperture is disposed on flex area in each tower unit, cooling air film is formed to distribution auxiliary combustion and on the outer surface of tower unit, distribution macropore is disposed in second conically shaped area, to distribution auxiliary combustion, multiple bar shaped pressure holes are disposed on the cylindrical section of head members, end pressure-bearing can be played and stablize cylinder reduction vibration, air-flow can be formed in end again to liquidate with flame, make burning more fully simultaneously, reduce regional temperature, conducive to the minimum discharge for realizing NOx.
Description
Technical field
The utility model belongs to gas turbine field, is related to a kind of combustion chamber components structure, specifically, referring to a kind of suitable
Inner tube structure for gas turbine reflux tube-type combustion chamber.
Background technique
Small size gas turbine below for 5MW, mostly using reflux tube-type combustion chamber single-cylinder type either annular
Arrange multi-cartridge.Its combustion chamber inner cylinder mostly uses individual plate integral structure, and upper end installation is fixed, and whole body distribution dredges gas
Stream, upper and lower port is Open architecture, is used for gas through-flow.Due to the structure generally single-cantilever thin-wall part, combustion process
In, lower end is easy that coupled vibrations occurs with combustion-gas flow, is unfavorable for flame stabilization.Meanwhile after air flows directly into from top to bottom
End can not form auxiliary air distribution, can not provide power-assisted for middle section flame zone full combustion of fuel and NOx reduction.
Utility model content
In view of the above drawbacks of the prior art and insufficient, the utility model is intended to provide a kind of suitable for gas turbine reflux
The inner tube structure of tube-type combustion chamber, inner tube structure segmentation are formed by connecting, and install end socket additional in end and carry out auxiliary air distribution,
End pressure-bearing can be played to stablize cylinder reduction vibration and liquidate in end formation air-flow with flame, keep burning more abundant
While, regional temperature is reduced, conducive to the minimum discharge for realizing NOx.
The technical scheme adopted by the utility model for solving the technical problem is:
A kind of inner tube structure suitable for gas turbine reflux tube-type combustion chamber, including an inner cylinder main body and one are arranged in institute
State the head members of inner cylinder bottom part body, which is characterized in that
The inner cylinder main body includes the multiple tower units sequentially coaxially arranged from top to bottom, adjacent two institute arranged up and down
It states and is tightly connected between tower unit,
Each tower unit includes the first conically shaped area in portion disposed thereon, the second conically shaped positioned at its underpart
Area and the flex area between first conically shaped area and the second conically shaped area, wherein
First conically shaped area, the second conically shaped area are the conically shaped that base diameter is greater than top diameter,
The top diameter in second conically shaped area is less than the base diameter in first conically shaped area,
The base diameter in second conically shaped area is suitable with the top diameter in first conically shaped area,
The flex area is integrally in the conically shaped that a top diameter is greater than base diameter,
The axial height in second conically shaped area is greater than the axial height in first conically shaped area,
The axial height in first conically shaped area is greater than the axial height of the flex area,
Have an at least deploying gas aperture along its circumferential directions on the flex area, the center line of the distribution aperture with
Angle α between the center line of the tower unit is acute angle,
Have an at least deploying gas macropore along its circumferential directions in second conically shaped area, the distribution macropore it is straight
Diameter is greater than the diameter of the distribution aperture,
The head members are sealedly connected on the bottom of the inner cylinder main body, including a cylindrical section and one is located at the cylinder
The circular arc bottom of section bottom, has multiple bar shaped pressure holes along its circumferential directions on the cylindrical section.
The utility model suitable for gas turbine reflux tube-type combustion chamber inner tube structure, the head members and
To bear internal gas flow pressure and flow out air-flow reversely from pressure hole, receiving air pressure can be improved interior the pressure hole opened up thereon
The overall stiffness of cylinder is reduced or avoided and coupled vibrations occurs with combustion-gas flow；Air-flow, which reversely flows out, to be rushed with external fluid
Mixing is hit, keeps central combustion area air, fuel mixing more uniform, and so that high-temperature region is generated secondary turbulent flow ginseng and mixes, it is raw to destroy NOx
Core space is produced, its discharge amount is reduced.
Preferably, the quantitative range of the tower unit is 1~10, when inner cylinder whole height is 10 times of tower unit central diameter
When above, theoretically the license of the structure uses boundary.
Preferably, the tower unit is prepared using high-temperature alloy sheet material.
Preferably, the tower unit is process using trapezoidal plate through distribution, bending, butt welding.
Preferably, the adjacent two tower units arranged up and down are sealedly and fixedly connected using the mode of welding, welding side
Formula is electric resistance welding or Laser Welding.
Preferably, the top in first conically shaped area is equipped with top welding section, and the bottom in second conically shaped area is set
There is bottom welding section, the top welding section is suitable with the axial height of bottom welding section, and the two is mutually linked on realization neighbour two
Welding between the tower unit of lower arrangement.
Preferably, the top welding section, bottom welding section axial height be about the tower unit whole height
1/5。
Preferably, the distance between the flex area and tower unit top are the 1/5~1/ of the tower cell height
3。
Preferably, the air film effect in the inner tank theca face can by change the diameter of the distribution aperture, angle and
The comprehensive adjustments such as the skirt region length of the tower unit.
Preferably, between the center line of the distribution aperture and the center line of the tower unit angle α at 15 °~30 °
Between；The diameter of the distribution aperture is 3~10mm.
Preferably, there are multiple rows of distribution macropore, adjacent two rows along its circumferential directions in second conically shaped area
Distribution macropore same column is arranged or is staggeredly arranged.
Preferably, the diameter of the distribution macropore is 5~20mm；The number of the distribution macropore is odd number or even number
It is a.
Preferably, the head members are formed by trapezoidal sheet alloy through distribution, butt welding.
Preferably, the circular arc bottom is common circular arc bottom or hemisphere bottom.
Preferably, the hole shape of the pressure hole is rectangle, ellipse, arc or semicircle a variety of with the assembly of rectangle etc.
Shape.
Preferably, the quantity of the pressure hole is odd number or even number.
Another aspect according to the present utility model additionally provides a kind of gas turbine reflux tube-type combustion chamber, including concentric
The inner barrel and outer barrel of arrangement, the height of the inner cylinder are the 1/2~2/3 of the outer cylinder height, and the inner cylinder is the utility model
Above-mentioned inner tube structure.
Compared with the existing technology, the inner tube structure for being suitable for gas turbine reflux tube-type combustion chamber of the utility model makes
Used time, air in axial direction from top to bottom enters the inner cylinder, on the way from the air pressure of each distribution aperture, distribution macropore and end socket
Hole outflow.Air-flow from distribution aperture, distribution macropore flow out when, a part of air-flow on the inside of upper one layer of tower unit skirt region with
Itself air distribution hole near zone forms convolution vortex confined area, and (gas shock of air distribution hole outflow is in upper tower unit skirt section area
On the inside of domain, cause to rebound and flow back, and then form convolution vortex in this regional area), a part flows downward along stack shell
And under effect of inertia on the outside of next layer of tower unit skirt section formed inertia confined area.Due to the high-temperature hot fluid on the outside of cylinder
It is close to inner tank theca to flow downwards, so that the cold air compression flow of two confined areas is formed cooling air film.To guarantee
The service life of cylinder.When air-flow is flow at end socket, since underface is circular head, can not flow directly out, air-flow is reverse
Flowing, flow velocity reduce, and air pressure is increased, and flow out from pressure hole.The pressure generated when gas flow counterflow makes cylinder to lower stress, from
And the rigidity of the cylinder entirety improved, fluid is highly resistant to the exciting of cylinder, to make cylinder, hot fluid, burning more
Add stabilization.Meanwhile liquidating from the inverted draft that pressure hole flows out with the hot combustion fluid to flow downward, it is generated in the region
Impact ginseng mixes confined area, so that central combustion area air-flow is uniformly mixed, destroys hot spot high-temperature region, reduces NOx yield, together
When have stabilization to the flame in the central combustion area.It contacts outside the inner tube structure with hot fluid, and is effectively formed on the outside
Cooling air film.Not only it has ensured working life, but also has effectively stabilized the combustion process of burning core and expansion area.The structure is suitable for
The combustion engine reflux tube-type combustion chamber of 1~7MW, and part universality is good, conducive to the standardization Part supplying for realizing each power type.
It is whole that there are two part, tower unit and end sockets altogether.The combustion chamber of different capacity or size can pass through the tower list of different number
Member superposition welding is realized, and is ended up with end socket.
Detailed description of the invention
Fig. 1 is the inner tube structure schematic diagram for being suitable for gas turbine reflux tube-type combustion chamber of the utility model；
Fig. 2 is the sectional view of tower unit in the utility model；
Fig. 3 is a kind of gas distribution structure schematic diagram of tower unit in the utility model；
Fig. 4 is another structural schematic diagram of tower unit in the utility model；
Fig. 5 is the sectional view of head members in the utility model.
Specific embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, develop simultaneously implementation referring to the drawings
The utility model is further described in example.
As shown in Figure 1, the inner tube structure for being suitable for gas turbine reflux tube-type combustion chamber of the utility model, inner cylinder 1 are same
The heart is arranged in the outer cylinder 2 of combustion chamber, and the axial height of inner cylinder 1 is the 1/2~2/3 of 2 axial height of outer cylinder.Inner cylinder 1 includes one
Inner cylinder main body and one be arranged in inner cylinder bottom part body head members 12, inner cylinder main body includes sequentially coaxially arranging from top to bottom
Multiple tower units 11, the quantitative range of tower unit 11 are 1~10, when inner cylinder whole height is 10 times of 11 central diameter of tower unit
When above, theoretically the license of the structure uses boundary.Tower unit 11 and head members 12 are all made of high-temperature alloy sheet material
It is prepared, is sealedly and fixedly connected between adjacent two tower unit 11 arranged up and down using the mode of welding, welding manner is
Electric resistance welding or Laser Welding, tower unit 11 are process using trapezoidal plate through distribution, bending, butt welding, head members 12
It is formed by trapezoidal sheet alloy through distribution, butt welding.
As shown in Figure 2-5, each tower unit 11 includes the first conically shaped area 111 in portion disposed thereon, is located under it
The second conically shaped area 113 in portion and the flex area 112 between the first conically shaped area 111 and the second conically shaped area 113,
In, the first conically shaped area 111, the second conically shaped area 113 are the conically shaped that base diameter is greater than top diameter, the second conically shaped
Base diameter of the top diameter in area 113 less than the first conically shaped area 111, the base diameter and first in the second conically shaped area 113
The top diameter in conically shaped area 111 is suitable, the whole conically shaped for being greater than base diameter in a top diameter in flex area 112, and second
The axial height in conically shaped area 113 is greater than the axial height in the first conically shaped area 111, the axial height in the first conically shaped area 111
Greater than the axial height of flex area 112, the top in the first conically shaped area 111 is equipped with top welding section, the second conically shaped area 113
Bottom is equipped with bottom welding section, and top welding section is suitable with the axial height of bottom welding section, and the two is mutually linked realization neighbour two
Welding between tower unit 11 arranged up and down, top welding section, bottom welding section axial height be about tower unit 11
The 1/5 of whole height.
The distance between 11 top of flex area 112 and tower unit is the 1/5~1/3 of 11 height of tower unit.Flex area
There is an at least deploying gas aperture 114 along its circumferential directions on 112, the diameter of distribution aperture 114 is 3~10mm, and distribution is small
Angle α between the center line in hole 114 and the center line of tower unit 11 is acute angle, preferably 15 °~30 °, distribution aperture 114
Cooling air film is formed to distribution auxiliary combustion and on the outer surface of tower unit 11, the air film effect in inner tank theca face can lead to
Cross the comprehensive adjustments such as the skirt region length of the diameter for changing distribution aperture 114, angle and tower unit 11.
There is a distribution macropore 115 along its circumferential directions in second conically shaped area 113, the diameter of distribution macropore 115 is 5~
20mm, distribution macropore 115 have multiple rows of, adjacent 115 same columns arrangement (such as Fig. 3) of two rows distribution macropore or are staggeredly arranged (such as Fig. 4).Match
The diameter of gas macropore 115 is greater than the diameter of distribution aperture 114, and distribution macropore 115 is to distribution auxiliary combustion.
Head members 12 are sealedly connected on the bottom of inner cylinder main body, and head members 12 are by trapezoidal sheet alloy through distribution, right
Seam welding is formed.Including a cylindrical section and one be located at cylindrical section bottom circular arc bottom, circular arc bottom be common circular arc bottom or hemisphere bottom,
There are multiple bar shaped pressure holes 116 along its circumferential directions on cylindrical section.The hole shape of pressure hole 116 is rectangle, ellipse, arc
Or the various shapes such as semicircle and rectangle assembly.The quantity of pressure hole 116 is odd number or even number.
The utility model suitable for gas turbine reflux tube-type combustion chamber inner tube structure, head members 12 and its
On the pressure hole 116 that opens up to bear internal gas flow pressure and flow out air-flow reversely from pressure hole 116, bearing air pressure can mention
The overall stiffness of high inner cylinder is reduced or avoided and coupled vibrations occurs with combustion-gas flow；Air-flow, which reversely flows out, to be sent out with external fluid
Raw impingement mix keeps central combustion area air, fuel mixing more uniform, and so that high-temperature region is generated secondary turbulent flow ginseng and mix, and destroys
NOx produces core space, reduces its discharge amount.
When in use, air is along axial direction side for the inner tube structure for being suitable for gas turbine reflux tube-type combustion chamber of utility model
To inner cylinder is from top to bottom entered, flowed on the way from the pressure hole 116 of each distribution aperture 114, distribution macropore 115 and head members 12
Out.When air-flow is flowed out from distribution aperture 114, distribution macropore 115, a part of air-flow is in 11 skirt region of upper one layer of tower unit
Side and itself air distribution hole near zone form convolution vortex confined area, and (gas shock of air distribution hole outflow is in upper tower unit 11
On the inside of skirt region, cause to rebound and flow back, and then form convolution vortex in this regional area), a part along stack shell to
It is lower flowing and under effect of inertia on the outside of next layer of 11 skirt section of tower unit formed inertia confined area.Due to the height on the outside of cylinder
Warmed fluid is close to inner tank theca and is flowed downwards, so that the cold air compression flow of two confined areas is formed cooling air film.
To guarantee the service life of cylinder.It, can not be direct since underface is circular head when air-flow is flow at head members 12
Outflow, air-flow reverse flow, flow velocity reduce, and air pressure is increased, and flow out from pressure hole 116.The pressure generated when gas flow counterflow, makes
Cylinder is to lower stress, so that the rigidity of the cylinder entirety improved, is highly resistant to fluid to the exciting of cylinder, to make cylinder
Body, hot fluid, burning are more stable.Meanwhile the inverted draft flowed out from pressure hole 116 is sent out with the hot combustion fluid to flow downward
Life liquidates, and generates impact ginseng in the region and mixes confined area, so that central combustion area air-flow is uniformly mixed, destroys hot spot high temperature
Area reduces NOx yield, while having stabilization to the flame in the central combustion area.It is connect outside the inner tube structure with hot fluid
Touching, and it is effectively formed cooling air film on the outside.Not only it has ensured working life, but also has effectively stabilized the combustion of burning core and expansion area
Burning process.Combustion engine reflux tube-type combustion chamber of the structure suitable for 1~7MW, and part universality is good, is conducive to realize each power machine
The standardization Part supplying of type.It is whole that there are two part, tower unit 11 and head members 12 altogether.The combustion of different capacity or size
Room is burnt, welding can be superimposed by the tower unit 11 of different number and realized, and ended up with head members 12.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent substitution, improvement and etc. done should be included in the utility model
Within the scope of.
Claims (10)
1. a kind of inner tube structure suitable for gas turbine reflux tube-type combustion chamber, including an inner cylinder main body and one be arranged in it is described
The head members of inner cylinder body ends, which is characterized in that
The inner cylinder main body includes the multiple tower units sequentially coaxially arranged from top to bottom, adjacent two tower arranged up and down
It is tightly connected between cylinder unit,
Each tower unit include portion disposed thereon the first conically shaped area, positioned at its underpart the second conically shaped area with
And the flex area between first conically shaped area and the second conically shaped area,
First conically shaped area, the second conically shaped area are the conically shaped that base diameter is greater than top diameter,
The top diameter in second conically shaped area is less than the base diameter in first conically shaped area,
The base diameter in second conically shaped area is suitable with the top diameter in first conically shaped area,
The flex area is integrally in the conically shaped that a top diameter is greater than base diameter,
The axial height in second conically shaped area is greater than the axial height in first conically shaped area,
The axial height in first conically shaped area is greater than the axial height of the flex area,
Have an at least deploying gas aperture along its circumferential directions on the flex area, the center line of the distribution aperture with it is described
Angle α between the center line of tower unit is acute angle,
There is an at least deploying gas macropore, the diameter of the distribution macropore big along its circumferential directions in second conically shaped area
In the diameter of the distribution aperture,
The head members are sealedly connected on the bottom of the inner cylinder main body, and the circular arc of bottom is located at including a cylindrical section and one
There are multiple bar shaped pressure holes at bottom along its circumferential directions on the cylindrical section.
2. inner tube structure according to claim 1, which is characterized in that the quantitative range of the tower unit is 1~10.
3. inner tube structure according to claim 1, which is characterized in that the adjacent two tower unit arranged up and down uses
The mode of welding is sealedly and fixedly connected, and welding manner is electric resistance welding or Laser Welding.
4. inner tube structure according to claim 3, which is characterized in that welded equipped with top at the top in first conically shaped area
Area is met, the bottom in second conically shaped area is equipped with bottom welding section, the axial height of the top welding section and bottom welding section
Quite, the two is mutually linked the welding realized between the adjacent two tower units arranged up and down to degree.
5. inner tube structure according to claim 4, which is characterized in that the top welding section, bottom welding section axial direction
Height is about the 1/5 of the tower unit whole height.
6. inner tube structure according to claim 1, which is characterized in that between at the top of the flex area and tower unit away from
From 1/5~1/3 for the tower cell height.
7. inner tube structure according to claim 1, which is characterized in that the center line of the distribution aperture and the tower list
Angle α is between 15 °~30 ° between the center line of member；The diameter of the distribution aperture is 3~10mm.
8. inner tube structure according to claim 1, which is characterized in that along its circumferencial direction cloth in second conically shaped area
It is equipped with multiple rows of distribution macropore, adjacent two rows distribution macropore same column is arranged or is staggeredly arranged.
9. inner tube structure according to claim 1, which is characterized in that the diameter of the distribution macropore is 5~20mm；It is described
The number of distribution macropore is odd number or even number.
The tube-type combustion chamber 10. a kind of gas turbine flows back, the inner barrel and outer barrel including arranged concentric, the height of the inner cylinder is institute
State the 1/2~2/3 of outer cylinder height, which is characterized in that the inner cylinder is the described in any item inner cylinder knots of the claims 1 to 9
Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821054577.0U CN208536043U (en) | 2018-07-04 | 2018-07-04 | A kind of inner tube structure suitable for gas turbine reflux tube-type combustion chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821054577.0U CN208536043U (en) | 2018-07-04 | 2018-07-04 | A kind of inner tube structure suitable for gas turbine reflux tube-type combustion chamber |
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|---|---|
| CN208536043U true CN208536043U (en) | 2019-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821054577.0U Active CN208536043U (en) | 2018-07-04 | 2018-07-04 | A kind of inner tube structure suitable for gas turbine reflux tube-type combustion chamber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108775601A (en) * | 2018-07-04 | 2018-11-09 | 大连派思透平动力科技有限公司 | A kind of inner tube structure suitable for gas turbine reflux tube-type combustion chamber |
-
2018
- 2018-07-04 CN CN201821054577.0U patent/CN208536043U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108775601A (en) * | 2018-07-04 | 2018-11-09 | 大连派思透平动力科技有限公司 | A kind of inner tube structure suitable for gas turbine reflux tube-type combustion chamber |
| CN108775601B (en) * | 2018-07-04 | 2024-05-10 | 大连欧谱纳透平动力科技有限公司 | Inner cylinder structure suitable for gas turbine backflow cylinder type combustion chamber |
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Address after: 116610 No. 73, Zhenpeng industrial city, Dalian Economic and Technological Development Zone, Liaoning Province Patentee after: Dalian oppner Turbine Power Technology Co., Ltd Address before: 116610 No. 73, Zhenpeng industrial city, Dalian Economic and Technological Development Zone, Liaoning Province Patentee before: DALIAN ENERGAS TURBINE POWER TECHNOLOGY Co.,Ltd. |