CN219159065U - Exhaust diffuser for a gas turbine unit - Google Patents
Exhaust diffuser for a gas turbine unit Download PDFInfo
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- CN219159065U CN219159065U CN202223324286.8U CN202223324286U CN219159065U CN 219159065 U CN219159065 U CN 219159065U CN 202223324286 U CN202223324286 U CN 202223324286U CN 219159065 U CN219159065 U CN 219159065U
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- gas turbine
- heat insulation
- insulation sleeve
- exhaust
- flexible heat
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Abstract
The utility model relates to the technical field of gas turbine units, in particular to an exhaust diffusion section of a gas turbine unit, which comprises an outlet transition pipe horizontally arranged, wherein the outlet transition pipe is of a conical structure, a detachable flexible heat insulation sleeve is wrapped outside the outlet transition pipe, a second detachable flexible heat insulation sleeve is wrapped outside the first detachable flexible heat insulation sleeve, and the second detachable flexible heat insulation sleeve is arranged along the round side edge of the first detachable flexible heat insulation sleeve. According to the scheme, the outlet transition pipe is arranged between the exhaust port and the exhaust transition section of the gas turbine unit, is of a conical structure, increases the flow area, reduces the flow velocity of exhaust, effectively reduces the pressure loss of exhaust, and accordingly improves the overall performance of the gas turbine.
Description
Technical Field
The utility model relates to the technical field of gas turbine units, in particular to an exhaust diffusion section of a gas turbine unit.
Background
When the gas turbine is operated, exhaust pressure loss can have adverse effects on the performance of the gas turbine, such as reduced power and economy, increased fuel consumption, and the like, and the loss of exhaust pressure comprises along-way resistance loss and local resistance loss, wherein the along-way resistance loss is related to material roughness and exhaust flow rate, and the local resistance loss is related to channel shape and exhaust flow rate, so that the exhaust flow rate is reduced, the exhaust pressure loss is effectively reduced, and the overall performance of the gas turbine is improved.
Therefore, in order to solve the above problems, an exhaust diffuser of a gas turbine unit is proposed
Disclosure of Invention
The utility model aims to solve the defects in the prior art and provides an exhaust diffusion section of a gas turbine unit.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the exhaust diffusion section of the gas turbine unit comprises an outlet transition pipe which is horizontally arranged, the outlet transition pipe is of a conical structure, the outside of the outlet transition pipe is wrapped with a detachable flexible heat insulation sleeve, the outside of the first detachable flexible heat insulation sleeve is wrapped with a second detachable flexible heat insulation sleeve, and the second detachable flexible heat insulation sleeve is arranged along the round side edge of the first detachable flexible heat insulation sleeve.
Preferably, two ends of the outlet transition pipe are connected with the gas turbine outlet expansion joint and the exhaust transition section through mounting flanges.
Preferably, the bottom welding of export transition pipe has the reinforcing plate of perpendicular setting, the one end of reinforcing plate runs through the surface of detachable flexible insulation cover and extends to its below, the one end welding of reinforcing plate has fixed stay, the stopper is installed through the screw to fixed stay's bottom, the bottom welding of stopper has the support.
Preferably, the fixed support and the bracket are made of the same material, and the material is Q235 carbon steel.
Preferably, the material of the outlet transition pipe is 06Cr18Ni11Ti.
Preferably, the taper angle of the outlet transition pipe is 14 degrees.
Compared with the prior art, the utility model has the following beneficial effects:
according to the scheme, the outlet transition pipe is arranged between the exhaust port and the exhaust transition section of the gas turbine unit, and is of a conical structure, so that the flow area is increased, the flow speed of exhaust gas is reduced, the pressure loss of the exhaust gas is effectively reduced, and the overall performance of the gas turbine is improved;
this scheme is through setting up first flexible insulating sleeve of detachable and the flexible insulating sleeve of second in the outside of export transition pipe, first flexible insulating sleeve of detachable and the flexible insulating sleeve of second for avoid getting into the loss of waste gas temperature in the export transition pipe, produce the heat retaining effect to the temperature of waste gas, promote the gas efficiency of waste gas, reduced the emission of waste gas, further reduce exhaust pressure loss, further promote gas turbine's wholeness ability.
Drawings
FIG. 1 is a schematic illustration in semi-section of the present utility model;
FIG. 2 is a schematic view of the outlet transition section structure of the present utility model;
FIG. 3 is a schematic cross-sectional view of the exit transition piece support location of the present utility model;
FIG. 4 is a schematic view of a bracket structure according to the present utility model;
fig. 5 is a schematic view of the form of the outlet transition section support and the support sliding support of the bracket according to the utility model.
In the figure: the heat insulation device comprises an outlet transition pipe 1, a first detachable flexible heat insulation sleeve 2, a second detachable flexible heat insulation sleeve 3, a bracket 4, a reinforcing plate 5, a fixed support 6 and a limiting block 7.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the utility model. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art.
The exhaust diffusion section of the gas turbine unit shown in the figures 1-5 comprises an outlet transition pipe 1 which is horizontally arranged, wherein the outlet transition pipe 1 is of a conical structure, and two ends of the outlet transition pipe 1 are connected with an outlet expansion joint and an exhaust transition section of the gas turbine through mounting flanges; the taper angle of the outlet transition pipe 1 is 14 degrees, so that the pressure loss is small, the exhaust flow rate is reduced, and the practicability is higher; the material of the outlet transition pipe 1 is 06Cr18Ni11Ti, so that the exhaust diffusion section can be ensured to continuously run at the design limit temperature of 600 ℃, and good mechanical property and better structure at the temperature can be ensured.
The outside of the outlet transition pipe 1 is wrapped with a detachable flexible heat insulation sleeve 2, the outside of the first detachable flexible heat insulation sleeve 2 is wrapped with a second detachable flexible heat insulation sleeve 3, and the second detachable flexible heat insulation sleeve 3 is arranged along the round side edge of the first detachable flexible heat insulation sleeve 2; the first detachable flexible heat insulation sleeve 2 and the second detachable flexible heat insulation sleeve 3 are made of the same material, the first detachable flexible heat insulation sleeve 2 is formed by three layers, the inner layer is made of high silica glass fiber cloth, the middle layer is made of nano aerogel felt and high silica glass fiber cotton, and the outer layer is made of Teflon cloth; the loss of the temperature of the exhaust gas in the transition pipe at the inlet is avoided, the temperature of the exhaust gas is subjected to heat preservation, the gas efficiency of the exhaust gas is improved, the emission of the exhaust gas is reduced, the pressure loss of the exhaust gas is further reduced, and the overall performance of the gas turbine is further improved.
The bottom of the outlet transition pipe 1 is welded with a vertically arranged reinforcing plate 5, one end of the reinforcing plate 5 penetrates through the surface of the detachable flexible heat insulation sleeve 2 and extends to the lower side of the detachable flexible heat insulation sleeve, one end of the reinforcing plate 5 is welded with a fixed support 6, the bottom end of the fixed support 6 is provided with a limiting block 7 through a screw, and the bottom end of the limiting block 7 is welded with a bracket 4; the fixed support 6 and the bracket 4 are made of the same material and are made of Q235 carbon steel; the fixed support 6 is prevented from moving left and right by the limiting block 7 on the support 4, so that the axial displacement formed by thermal expansion of the heated metal of the outlet transition pipe 1 is guaranteed to carry out sliding support, the stability of the outlet transition pipe 1 is improved, and the functionality is stronger.
Working principle: when the exhaust diffusion section is installed, the small-area flange opening of the outlet transition pipe 1 is connected with the exhaust expansion joint of the gas turbine through bolts, the large-area flange opening of the outlet transition pipe 1 is connected with the exhaust transition section, and the channel area of the outlet transition pipe 1 is gradually increased through a conical structure, so that the exhaust flow rate is gradually reduced. After the connection of the outlet transition pipe 1 is completed, a first detachable flexible heat insulation sleeve 2 is covered on the outlet transition pipe 1 to achieve the heat insulation effect, and a second detachable flexible heat insulation sleeve 3 is covered outside the gas turbine box body by the detachable flexible heat insulation sleeve 2 and is used for sealing a gap between the gas turbine box body and the outlet transition pipe 1 to achieve the heat insulation effect and the effect of placing gas leakage;
when the outlet transition pipe is in place, the fixed support 6 should be placed on the support 4, and the fixed support 6 is ensured to be positioned between the two limiting blocks 7 on the support 4, when the gas turbine normally operates, the exhaust diffusion section generates axial thermal expansion due to heating, the fixed support 6 generates axial displacement on the support 4, and the axial length of the support 4 is greater than that of the fixed support 6, so that the fixed support 6 is ensured to be completely contacted with the support 4 when the exhaust diffusion section is heated and expanded.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made therein without departing from the spirit and scope of the utility model, which is defined by the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (6)
1. The exhaust diffusion section of the gas turbine unit comprises an outlet transition pipe (1) which is horizontally arranged, and is characterized in that: the outlet transition pipe (1) is of a conical structure, the first detachable flexible heat insulation sleeve (2) is wrapped outside the outlet transition pipe (1), the second detachable flexible heat insulation sleeve (3) is wrapped outside the first detachable flexible heat insulation sleeve (2), and the second detachable flexible heat insulation sleeve (3) is arranged along the round side edge of the first detachable flexible heat insulation sleeve (2).
2. The exhaust gas diffusion section of a gas turbine unit according to claim 1, characterized in that both ends of the outlet transition pipe (1) are connected with the gas turbine outlet expansion joint and the exhaust gas transition section by mounting flanges.
3. The exhaust diffusion section of a gas turbine unit according to claim 1, characterized in that a reinforcing plate (5) is welded at the bottom of the outlet transition pipe (1), one end of the reinforcing plate (5) penetrates through the surface of the detachable flexible heat insulation sleeve (2) and extends to the lower side of the reinforcing plate, a fixed support (6) is welded at one end of the reinforcing plate (5), a limiting block (7) is mounted at the bottom end of the fixed support (6) through a screw, and a bracket (4) is welded at the bottom end of the limiting block (7).
4. An exhaust gas diffusion section of a gas turbine unit according to claim 3, wherein the fixed support (6) and the bracket (4) are made of the same material and are made of Q235 carbon steel.
5. The exhaust gas diffusion section of a gas turbine unit according to claim 1, wherein the outlet transition pipe (1) is made of 06Cr18Ni11Ti.
6. The exhaust gas diffusion section of a gas turbine unit according to claim 1, characterized in that the angle of taper of the outlet transition duct (1) is 14 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223324286.8U CN219159065U (en) | 2022-12-12 | 2022-12-12 | Exhaust diffuser for a gas turbine unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223324286.8U CN219159065U (en) | 2022-12-12 | 2022-12-12 | Exhaust diffuser for a gas turbine unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219159065U true CN219159065U (en) | 2023-06-09 |
Family
ID=86617662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223324286.8U Active CN219159065U (en) | 2022-12-12 | 2022-12-12 | Exhaust diffuser for a gas turbine unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219159065U (en) |
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2022
- 2022-12-12 CN CN202223324286.8U patent/CN219159065U/en active Active
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