CN202991151U - Cooling system for lower end wall of first stage guide vane of gas turbine - Google Patents
Cooling system for lower end wall of first stage guide vane of gas turbine Download PDFInfo
- Publication number
- CN202991151U CN202991151U CN 201220667499 CN201220667499U CN202991151U CN 202991151 U CN202991151 U CN 202991151U CN 201220667499 CN201220667499 CN 201220667499 CN 201220667499 U CN201220667499 U CN 201220667499U CN 202991151 U CN202991151 U CN 202991151U
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- Prior art keywords
- end wall
- chopped
- cooling
- trailing edge
- head stator
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Abstract
The utility model relates to a cooling system for the lower end wall of a first stage guide vane of a gas turbine, and solves the problems of oxidation and creep damage of the first stage guide vane of the gas turbine and the lower end wall due to too high metal surface temperature. The cooling system further comprises a split screen; a cooling tank of which the shape is the same as that of the split screen is processed in the upper surface of the front edge side of the lower end wall of the first stage guide vane; the split screen is arranged below the cooling tank and covers the cooling tank, and is fixedly connected with the lower end wall of the first stage guide vane; through holes of which the shapes are the same as that of the cross section of a front sleeve are processed in the bottom surfaces of the split screen and the cooling tank; the through hole in the split screen is arranged over against the through hole in the bottom surface of the cooling tank; the front sleeve passes through the through hole in the split screen and the through hole in the cooling tank to be arranged in the guide vane; and the upper end of the front sleeve is fixedly connected with the through hole in the split screen. The cooling system can be widely suitable for cooling the lower end wall of the first stage guide vane of the gas turbine.
Description
Technical field
The utility model relates to a kind of cooling system that fires machine turbine chopped-off head stator.
Background technique
According to China energy industry structure as can be known, Natural Gas Resources in China is less, and coal resource is abundant.Abundant by the medium and low heat value fuel that coal refines, therefore improve the heavy combustion engine performance that is applicable to medium and low heat value fuel particularly important, present middle lower calorific value heavy duty gas turbine turbine guide vane is directly exposed in higher heat load environment, especially blade blade and up and down end wall, easily cause blade to produce oxidation and creep occurs damaging under long-term high heat load environment.
The model utility content
The problem that the utility model damages for the excess Temperature generation oxidation that solves combustion machine turbine chopped-off head stator and lower end wall metal surface and creep, thus a kind of combustion machine turbine chopped-off head stator lower end wall cooling system is provided.
Combustion machine turbine chopped-off head stator lower end wall cooling system, it comprises chopped-off head stator lower end wall, stator and front sleeve, described stator is fixed between chopped-off head stator upper end wall and chopped-off head stator lower end wall, be processed with rib on chopped-off head stator lower end wall, chopped-off head stator lower end wall is divided into front edge side and trailing edge side by rib, and described cooling system also comprises the shunting screen;
Described chopped-off head stator lower end wall front edge side lower surface is processed with the cooling bath consistent with shunting the screen shape, and the shunting screen covers cooling bath under being arranged on cooling bath, and affixed with chopped-off head stator lower end wall;
All be processed with the through hole consistent with the front sleeve shape of cross section on the bottom surface of described shunting screen and cooling bath, and the lead to the hole site on the through hole on shunting screen and cooling bath bottom surface over against, through hole and the through hole on cooling bath that front sleeve passes on the shunting screen are arranged in stator, and the upper end of front sleeve is affixed with the through hole on the shunting screen.
The utility model adopts combustion machine turbine chopped-off head stator lower end wall cooling system to make cold air obtain comprehensive utilization, the temperature of combustion machine turbine chopped-off head stator and lower end wall metal blade is effectively reduced, can reduce temperature 500-600k, effectively avoid producing the high heat load environment and then reduced the stator blade producing the problem of oxidation and creep damage.
Description of drawings
Fig. 1 is the worm's eye view of combustion machine turbine chopped-off head stator lower end wall cooling system;
Fig. 2 is the worm's eye view of the lower end wall structure of combustion machine turbine chopped-off head stator lower end wall cooling system;
Fig. 3 is the rear view of Fig. 2;
Fig. 4 is the front view of Fig. 2.
Embodiment
Embodiment one, in conjunction with this embodiment of Fig. 1-4 explanation.Combustion machine turbine chopped-off head stator lower end wall cooling system, it comprises chopped-off head stator lower end wall 1, stator 4 and front sleeve 3, described stator 4 is fixed between chopped-off head stator upper end wall 5 and chopped-off head stator lower end wall 1, be processed with rib 7 on chopped-off head stator lower end wall 1, chopped-off head stator lower end wall 1 is divided into front edge side and trailing edge side by rib, and described cooling system also comprises shunting screen 2;
Described chopped-off head stator lower end wall 1 front edge side lower surface is processed with the cooling bath 6 consistent with shunting screen 2 shapes, and shunting screen 2 covers cooling bath 6 under being arranged on cooling bath 6, and affixed with chopped-off head stator lower end wall 1;
All be processed with the through hole consistent with the front sleeve shape of cross section on the bottom surface of described shunting screen 2 and cooling bath 6, and the lead to the hole site on the through hole on shunting screen 2 and cooling bath 6 bottom surfaces over against, through hole and the through hole on cooling bath 6 that front sleeve 3 passes on shunting screen 2 are arranged in stator 4, and the lower end of front sleeve 3 is affixed with the through hole on shunting screen 2; Rear sleeve and chopped-off head stator upper end wall 5 are affixed.
The air inlet side of described stator 4 is the front edge side of chopped-off head stator lower end wall 1, and the side of giving vent to anger of stator 4 is the trailing edge side of chopped-off head stator lower end wall 1.
What embodiment two, this embodiment were different from embodiment one is that described shunting screen 2 is provided with several impact openings 8, and described several impact openings 8 are distributed in the axis projection region exterior of stator on shunting screen 2.Other composition and Placement are identical with embodiment one.
Described impact opening 8 distributes along shunting screen 2 leading edges to trailing edge direction, is scattered in 13 row; The first row to the six every trade spacings are equal, and in every row, hole pitch equates; The the 7th to the 13 every trade spacing is equal, and in every row, hole pitch equates; The number of described impact opening 8 is 192-212, and the aperture is between 1.2-1.5mm.
Embodiment three, this embodiment are different from embodiment one or embodiment two is that described cooling bath 6 bottom surfaces are provided with several stator leading edge air film holes 9, described several stator leading edge air film holes 9 evenly distribute along stator 4 leading edges, and the outgassing direction of several stator leading edge air film holes 9 all is positioned on the leading edge of stator 4 and chopped-off head stator lower end wall 1 joint.Other composition and Placement are identical with embodiment one.
The number of described stator leading edge air film hole 9 is 10-14, and the aperture is 1.2-1.5mm.
Embodiment four, this embodiment are different from embodiment one is that described cooling bath 6 bottom surfaces are provided with several cooling air fenestras 10.Other composition and Placement are identical with embodiment one.
Described cooling air fenestra 1 distributes from turbine chopped-off head stator lower end wall 1 leading edge to the trailing edge direction, is scattered in eight row; The line space of the first row and the second row is for rotating in a circumferential direction 0.365 °, and the angle in hole is identical; The third line and fourth line hole pitch are for rotating in a circumferential direction 0.3 °, and the angle in hole is identical, and the circumferential spacing in fifth line hole is 0.52 °.
Embodiment five, this embodiment are different from embodiment one, embodiment two or embodiment four is that the intrados of described chopped-off head stator lower end wall 1 is provided with several inner arc side openings 11 between cooling bath 6 lower surfaces.Other composition and Placement are identical with embodiment one.
The number of described inner arc side opening 11 is 4-6, and the aperture is 1.5-2mm.
What embodiment six, this embodiment were different from embodiment one is that described front sleeve is by being provided with several back of the body arc side openings 12 between hole 14 internal surfaces and chopped-off head stator lower end wall 1 back of the body arc side external surface.Other composition and Placement are identical with embodiment one.
What embodiment seven, this embodiment were different from embodiment one or embodiment six is also to be processed with the through hole consistent with rear sleeve-shaped on described cooling bath 6; Be provided with several back arc side openings 13 between described through-hole inner surface and chopped-off head stator lower end wall 1 back of the body arc side external surface.Other composition and Placement are identical with embodiment one.
What embodiment eight, this embodiment were different from embodiment one is that described cooling system also comprises cover plate 14;
Described chopped-off head stator lower end wall 1 trailing edge side upper surface is processed with the trailing edge cooling slot 16 consistent with cover plate 15 shapes, and cover plate 15 covers trailing edge cooling slot 16 under being arranged on trailing edge cooling slot 16, and affixed with chopped-off head stator lower end wall 1.Other composition and Placement are identical with embodiment one.
Embodiment nine, this embodiment are different with embodiment eight from embodiment one is to be provided with several the first trailing edge Cooling Holes 17 between the leading edge face of the inner side surface of described trailing edge cooling slot 16 and rib, be provided with several the second trailing edge Cooling Holes 18 between the lower surface of the inner side surface of trailing edge cooling slot 16 and chopped-off head stator lower end wall 1, trailing edge cooling slot 16 trailing edge sidewalls are provided with several the 3rd trailing edge Cooling Holes 19.Other composition and Placement are identical with embodiment eight with embodiment one.
Embodiment ten, this embodiment are different from embodiment eight is that described cooling system also comprises and is provided with the trailing edge striking plate 20 that several impact plate holes;
Described trailing edge striking plate 20 and cover plate 15, trailing edge cooling slot are provided with the space between 16 bottom surfaces, and trailing edge striking plate 20 upper ends and cover plate 15 are affixed, and lower end and trailing edge cooling slot 16 bottom surfaces are affixed.Other composition and Placement are identical with embodiment eight.
The utility model adopts combustion machine turbine chopped-off head stator lower end wall cooling system, carry out cooling to chopped-off head stator lower end wall 1, avoided in traditional design the problem of, chopped-off head stator upper end wall 1 single for combustion machine turbine chopped-off head stator upper end wall cooling system form and the stator 4 easy ablations in blade place and structural failure.
Claims (10)
1. fire machine turbine chopped-off head stator lower end wall cooling system, it comprises chopped-off head stator lower end wall (1), stator (4) and front sleeve (3), described stator (4) is fixed between chopped-off head stator upper end wall (5) and chopped-off head stator lower end wall (1), be processed with rib (7) on chopped-off head stator lower end wall (1), chopped-off head stator lower end wall (1) is divided into front edge side and trailing edge side by rib (7), it is characterized in that described cooling system also comprises shunting screen (2);
Described chopped-off head stator lower end wall (1) front edge side lower surface is processed with the cooling bath (6) consistent with shunting screen (2) shape, shunting screen (2) covers cooling bath (6) under being arranged on cooling bath (6), and affixed with chopped-off head stator lower end wall (1);
All be processed with the through hole consistent with the front sleeve shape of cross section on the bottom surface of described shunting screen (2) and cooling bath (6), and the lead to the hole site on the through hole on shunting screen (2) and cooling bath (6) bottom surface over against, through hole and the through hole on cooling bath (6) that front sleeve (3) passes on shunting screen (2) are arranged in stator (4), and the lower end of front sleeve (3) is affixed with the through hole on shunting screen (2).
2. combustion machine turbine chopped-off head stator lower end wall cooling system according to claim 1, it is characterized in that described shunting screen (2) is provided with several impact openings (8), described several impact openings (8) are distributed in the axis projection region exterior of stator on shunting screen (2).
3. combustion machine turbine chopped-off head stator lower end wall cooling system according to claim 1 and 2, it is characterized in that described cooling bath (6) bottom surface is provided with several stator leading edge air film holes (9), described several stator leading edge air film holes (9) evenly distribute along stator (4) leading edge, and the outgassing direction of several stator leading edge air film holes (9) all is positioned at the leading edge of stator (4) and chopped-off head stator lower end wall (1) joint.
4. combustion machine turbine chopped-off head stator lower end wall cooling system according to claim 1 is characterized in that described cooling bath (6) bottom surface is provided with several cooling air fenestras (10).
5. according to claim 1,2 or 4 described combustion machine turbine chopped-off head stator lower end wall cooling systems, is characterized in that the intrados of described chopped-off head stator lower end wall (1) is provided with several inner arc side openings (11) between cooling bath (6) upper surface.
6. be provided with several between combustion machine turbine chopped-off head stator lower end wall cooling system according to claim 1, the internal surface that it is characterized in that the through hole on shunting screen (2) that described front sleeve (3) passes and chopped-off head stator lower end wall (1) back of the body arc side external surface and carry on the back arc side opening (12).
7. according to claim 1 or 6 described combustion machine turbine chopped-off head stator lower end wall cooling systems, is characterized in that also being processed with on described cooling bath (6) through hole consistent with rear sleeve-shaped; Be provided with several back arc side openings (13) between described through-hole inner surface and chopped-off head stator lower end wall (1) back of the body arc side external surface.
8. combustion machine turbine chopped-off head stator lower end wall cooling system according to claim 1, is characterized in that described cooling system also comprises cover plate (15);
Described chopped-off head stator lower end wall (1) trailing edge side lower surface is processed with the trailing edge cooling slot (16) consistent with cover plate (15) shape, cover plate (15) covers trailing edge cooling slot (16) under being arranged on trailing edge cooling slot (16), and affixed with chopped-off head stator lower end wall (1).
9. combustion machine turbine chopped-off head stator lower end wall cooling system according to claim 8, it is characterized in that being provided with several the first trailing edge Cooling Holes (17) between the leading edge face of the inner side surface of described trailing edge cooling slot (16) and rib, be provided with several the second trailing edge Cooling Holes (18) between the lower surface of the inner side surface of trailing edge cooling slot (16) and chopped-off head stator lower end wall (1), trailing edge cooling slot (16) trailing edge sidewall is provided with several the 3rd trailing edge Cooling Holes (19).
10. combustion machine turbine chopped-off head stator lower end wall cooling system according to claim 8, is characterized in that described cooling system also comprises the trailing edge striking plate (20) that is provided with several impact plate holes;
Described trailing edge striking plate (20) and cover plate (15), trailing edge cooling slot (16) are provided with the space between the bottom surface, and trailing edge striking plate (20) upper end and cover plate (15) are affixed, and lower end and trailing edge cooling slot (16) bottom surface is affixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220667499 CN202991151U (en) | 2012-12-06 | 2012-12-06 | Cooling system for lower end wall of first stage guide vane of gas turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220667499 CN202991151U (en) | 2012-12-06 | 2012-12-06 | Cooling system for lower end wall of first stage guide vane of gas turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202991151U true CN202991151U (en) | 2013-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220667499 Expired - Lifetime CN202991151U (en) | 2012-12-06 | 2012-12-06 | Cooling system for lower end wall of first stage guide vane of gas turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202991151U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996187A (en) * | 2012-12-06 | 2013-03-27 | 哈尔滨汽轮机厂有限责任公司 | Combustion engine turbine first-level guide blade lower end wall cooling system |
-
2012
- 2012-12-06 CN CN 201220667499 patent/CN202991151U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996187A (en) * | 2012-12-06 | 2013-03-27 | 哈尔滨汽轮机厂有限责任公司 | Combustion engine turbine first-level guide blade lower end wall cooling system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130612 |