WO1998050684A1 - Pale fixe de refroidissement de turbine a gaz - Google Patents
Pale fixe de refroidissement de turbine a gaz Download PDFInfo
- Publication number
- WO1998050684A1 WO1998050684A1 PCT/JP1998/001958 JP9801958W WO9850684A1 WO 1998050684 A1 WO1998050684 A1 WO 1998050684A1 JP 9801958 W JP9801958 W JP 9801958W WO 9850684 A1 WO9850684 A1 WO 9850684A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- steam
- cooling
- passage
- inner shroud
- vane
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/18—Hollow blades, i.e. blades with cooling or heating channels or cavities; Heating, heat-insulating or cooling means on blades
- F01D5/187—Convection cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/10—Stators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/80—Platforms for stationary or moving blades
- F05D2240/81—Cooled platforms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/20—Heat transfer, e.g. cooling
- F05D2260/221—Improvement of heat transfer
- F05D2260/2214—Improvement of heat transfer by increasing the heat transfer surface
- F05D2260/22141—Improvement of heat transfer by increasing the heat transfer surface using fins or ribs
Definitions
- the present invention relates to a steam cooling vane of a gas turbine, and more particularly to a cooling vane of a gas turbine using steam as a cooling medium and steam cooling an inner shroud along with the blade.
- cooling air 47 flows into the air passage 43A from the outer shroud 41, flows to the base side (inner shroud side), and the next air passage 43B from the base side. And flows to the tip side (outer shroud side) to enter the next air passage 43C, and then flows sequentially to the air passages 43D and 43E to cool the blades. Then, in the air passage 4 3 E, the cooling air is blown out from the air blowing hole 44 of the trailing edge 45, and the remaining air flows out from below the inner shroud 42.
- a serpentine cooling path is constructed with air passages 43A to 43E, and the cooling air flows through this path to cool the blades. Not considered at all.
- Figure 4 shows an example of a stationary blade that uses steam to cool the blades and air to cool the shroud.
- the steam cooling method used for this vane is still not available.
- reference numeral 30 denotes a stationary blade, the upper outer shroud is omitted, and a part of the blade is shown.
- 3 1 is the inner shroud.
- 33 A, 33 B, 33 C, 33 D, 33 E, and 33 F are steam passages inside the stationary blade, respectively.
- the cooling steam 39 flows into the steam passage 33A from the front edge of the outer shroud (not shown), and then enters the steam passage from the base side (inner shroud side). It flows into 33 B, and from the upper part (outer shroud side) to the next steam passage 33, similarly flows sequentially to steam passages 33 D and 33 E, and from the base side of the steam passage 33 E After flowing into the steam passage 33F on the trailing edge side and cooling the inside of the wing, it is recovered from the steam recovery port on the outer shroud.
- cooling of the inner shroud 31 is performed by cooling air, and the cooling air 37 guided from the lower part of the inner shroud 31 flows into the air cooling passage inside the inner shroud 31 from one end.
- the air flows from the one end to the other end in the air cooling passage to cool the entire inner shroud 31 and flows out from the air ejection hole 38 at the other end, thereby cooling the entire air.
- the air cooling method is used exclusively for cooling the blades, and is not used for cooling the inner shroud at all.
- the cooling air flows into the air cooling passage in the inner shroud 31 and flows from one end of the inner shroud to the other end. This is performed by cooling the surface of the shroud from the inside and flowing out from the air outlet 38 at the other end.
- a recess is provided in the inner surface of the inner shroud 31
- an impingement plate is arranged in parallel with the inner surface of the inner shroud, and cooling air 37 supplied from the lower portion is applied to the impinging plate.
- the present applicant is also developing a method in which the air inside the shroud is uniformly cooled with air by jetting out from a number of holes.
- the main object of the present invention is not only to cool the inside of the blade but also to cool the inner shroud, and to collect all the steam after cooling.
- An object of the present invention is to provide a gas turbine cooling vane that can be returned to a steam supply source for effective use, does not require cooling air, and can improve turbine efficiency.
- Another object of the present invention is to provide a gas turbine cooling vane which simplifies the structure of a steam passage when cooling the inner shroud and is advantageous in terms of assembly and processing.
- the present invention provides the following means (1) to (5) to achieve the above object.
- the first and second steam cooling means can cool the inside of the stator vane with steam and also cool the inner shroud with steam. This saves power consumption in the compressor and cooler, and prevents cooling air from being discharged to the combustion gas passage, preventing the temperature of the combustion gas from decreasing and reducing turbine efficiency.
- the first steam cooling means and the second steam cooling means may include: A part of the cooling steam flows from the first steam cooling means to the second steam cooling means on the leading edge side of the vane, The cooling steam passing through the steam cooling means is returned to the first steam cooling means at the trailing edge side of the stationary blade.
- the blades can be efficiently cooled, and the cooling steam flowing into the blades has a relatively high temperature by cooling the blades and the inner shroud. Rises, is recovered via the outer shroud, is returned to the steam supply, and is effectively utilized, thus improving turbine efficiency.
- the second steam cooling means is a second steam passage, and the periphery of an end of the inner shroud is provided. It is characterized by being arranged in.
- the cooling steam flows around the inner shroud, and efficiently cools the inner shroud.
- the second steam cooling means of the inner shroud includes a groove provided along a peripheral side surface of the inner shroud; It is characterized by comprising a side plate closing the groove.
- the second steam cooling means is configured as described above, so that the inner shroud can be easily formed at the end.
- FIG. 2 is an internal cross-sectional view of the inner shroud in the cooling vane of the gas turbine according to one embodiment of the present invention.
- FIG. 3 is a cross-sectional view taken along line AA in FIG. 2, and (a), (b), and (c) show different structural examples.
- FIG. 4 is a schematic view of a gas turbine cooling vane according to an example created by the applicant related to the present invention.
- FIG. 5 is an internal explanatory view of a conventional gas turbine stationary blade. Description of the preferred embodiment
- FIG. 1 is a conceptual diagram of a cooling vane of a gas turbine according to an embodiment of the present invention.
- reference numerals 31 to 33 A to 33 F have the same functions as the cooling vanes of the gas turbine being developed by the present applicant shown in FIG. 4 and have already been described. Description is omitted.
- the characteristic part of the present invention is the gas which is being developed by the applicant.
- the cooling vane of the turbine was further improved so that not only the inside of the blade 30 but also the end of the inner shroud 31 was steam-cooled.
- the cooling steam 39 flows into the steam passage 33 A from the outer shroud (not shown) on the leading edge side of the stationary blade 30, as in the example of FIG. It enters the steam passage 33 B, flows upward (outside shroud side), and flows into the steam passage 33 C. Similarly, after flowing through the steam passages 33C and 33D, the steam flows from the lower portion (inside shroud side) of the steam passage 33E to the steam passage 33F at the trailing edge of the blade 30, and in these processes, the blade The inside is cooled and collected from the steam recovery port of the upper outer shroud (not shown).
- a part of the cooling steam 39 flowing from the steam passage 33 A at the leading edge enters the inner shroud 31 from the lower part of the steam passage 33 A, and flows from the steam inlet passage 22 to the steam passage 2.
- the steam passage 20 is provided around the end of the inner shroud 31, flows to the right and left from the steam inflow passage 22, passes through both side ends to the steam outflow passage 21 on the trailing edge side, and both sides Inflows from.
- the cooling steam flowing into the steam outlet passage 21 enters the trailing-edge steam passage 33 F communicating with this passage, and passes through the steam passages 33 A to 33 E inside the wing, and the steam passage 33 F It merges with the cooling steam flowing into the tank, flows upward, and is recovered from the steam recovery port of the outer shroud (not shown). In this way, the cooling steam steam-cools the inside of the blade 30 and, with a portion of the steam, also cools the end of the inner shroud 31 to steam-cool the entire stationary blade.
- FIG. 2 is an internal cross-sectional view of the inner shroud 31 of the cooling blade in the above-described embodiment.
- a steam passage 20 is provided in a rib 35 provided around the end of the inner shroud 31.On the leading edge side of the blade, the steam passage 20 and the steam passage 33A are provided.
- a steam inflow passage 22 that connects the steam passage 33 and a steam outflow passage 21 that connects the steam passage 33F and the steam passage 20 are provided on the trailing edge side of the blade.
- the cooling steam passes through the steam passage 22 from the steam passage 33 A on the leading edge side of the stator vane 30, flows into the steam passage 20, is divided into left and right sides, and is divided inside. After passing through both ends of the shroud 3 1, it flows to the trailing edge of the stator vane, flows out of the steam outflow channel 2 1 to the steam passage 3 3 F at the trailing edge of the vane, and cools around the inner shroud 3 1. Reject.
- FIGS. 3A, 3B, and 3C are cross-sectional views taken along the line AA in FIG. 2, each showing a steam passage 20 having a different structural example.
- a groove is first formed in a rib 35 provided at an end of the inner shroud 31.
- FIG. 3A the steam passage 20 is defined by inserting and fixing a side plate 23 having almost the same width as the groove at the end of the groove.
- FIG. 3A the structure shown in FIG. 3A, the steam passage 20 is defined by inserting and fixing a side plate 23 having almost the same width as the groove at the end of the groove.
- 3 (b) is such that the groove formed in the rib 35 is provided with a protrusion having almost the same width as the width of the groove, and the width of the end of the rib 35 and the inner shroud 31
- the steam passage 20 is defined by fitting and fixing a side plate 24 having the same width as that of the side plate 24. Further, in the structure of FIG. 3 (c), the rib 35 and the side plate 25 having the same thickness as the end of the inner shroud 31 are attached and fixed so as to cover the entire groove formed in the rib 35. Thereby, the steam passage 20 is defined.
- a wire welding or brazing indicated by reference numeral 36 is applied to a contact portion between the groove and the side plate to prevent steam leakage. It is desirable to do.
- any of these structures can be applied to the cooling vane of the gas turbine according to the present invention.
- the structure of the steam passage 20 is not limited to only these structures. It may be hollowed out and integrally molded, and the shape may be not only square but also round.
- the steam passage 20 is formed around the end of the inner shroud 31, and the steam passage 33 is provided through the steam inflow passage 22 from the steam passage 33 A on the leading edge side of the blade. 20 and then flow out of the trailing-edge steam passage 3 3F through the trailing-edge steam outflow passage 21 through the both end portions of the inner shroud 3 1.
- the inner shroud 31 can be cooled by steam, reducing the air used for cooling and further reducing the power of the compressor and cooler.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/202,594 US6092983A (en) | 1997-05-01 | 1998-04-28 | Gas turbine cooling stationary blade |
EP98917726A EP0911488B1 (en) | 1997-05-01 | 1998-04-28 | Gas turbine cooled stationary blade |
CA002261184A CA2261184C (en) | 1997-05-01 | 1998-04-28 | Cooled stationary blade of a gas turbine |
DE69821312T DE69821312T2 (de) | 1997-05-01 | 1998-04-28 | Gekühlte Statorschaufel für Gasturbinen |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11384597A JP3276305B2 (ja) | 1997-05-01 | 1997-05-01 | ガスタービンの冷却静翼 |
JP9/113845 | 1997-05-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998050684A1 true WO1998050684A1 (fr) | 1998-11-12 |
Family
ID=14622507
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1998/001958 WO1998050684A1 (fr) | 1997-05-01 | 1998-04-28 | Pale fixe de refroidissement de turbine a gaz |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0911488B1 (ja) |
JP (1) | JP3276305B2 (ja) |
CA (1) | CA2261184C (ja) |
DE (1) | DE69821312T2 (ja) |
WO (1) | WO1998050684A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7168914B2 (en) * | 2001-07-11 | 2007-01-30 | Mitsubishi Heavy Industries, Ltd. | Gas turbine stationary blade |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1571296A1 (de) * | 2004-03-01 | 2005-09-07 | Alstom Technology Ltd | Gekühlte Strömungsmaschinenschaufel und Verfahren zur Kühlung |
US7147439B2 (en) * | 2004-09-15 | 2006-12-12 | General Electric Company | Apparatus and methods for cooling turbine bucket platforms |
US7309212B2 (en) * | 2005-11-21 | 2007-12-18 | General Electric Company | Gas turbine bucket with cooled platform leading edge and method of cooling platform leading edge |
WO2007094212A1 (ja) * | 2006-02-14 | 2007-08-23 | Ihi Corporation | 冷却構造 |
JP4979983B2 (ja) * | 2006-05-29 | 2012-07-18 | 三井造船株式会社 | 炉頂圧回収タービン翼部へのダスト付着防止装置 |
JP4801618B2 (ja) * | 2007-03-30 | 2011-10-26 | 三菱重工業株式会社 | ガスタービンの静翼およびこれを備えたガスタービン |
US8777568B2 (en) * | 2010-09-30 | 2014-07-15 | General Electric Company | Apparatus and methods for cooling platform regions of turbine rotor blades |
US8684664B2 (en) * | 2010-09-30 | 2014-04-01 | General Electric Company | Apparatus and methods for cooling platform regions of turbine rotor blades |
US8840369B2 (en) * | 2010-09-30 | 2014-09-23 | General Electric Company | Apparatus and methods for cooling platform regions of turbine rotor blades |
US8814517B2 (en) * | 2010-09-30 | 2014-08-26 | General Electric Company | Apparatus and methods for cooling platform regions of turbine rotor blades |
US8858160B2 (en) * | 2011-11-04 | 2014-10-14 | General Electric Company | Bucket assembly for turbine system |
US8905714B2 (en) * | 2011-12-30 | 2014-12-09 | General Electric Company | Turbine rotor blade platform cooling |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04311604A (ja) * | 1991-04-11 | 1992-11-04 | Toshiba Corp | タービン静翼 |
JPH0565802A (ja) * | 1991-09-06 | 1993-03-19 | Toshiba Corp | ガスタービン |
JPH0693801A (ja) * | 1992-09-17 | 1994-04-05 | Hitachi Ltd | ガスタービン翼 |
JPH06257405A (ja) * | 1992-12-30 | 1994-09-13 | General Electric Co <Ge> | タービン |
JPH08177406A (ja) * | 1994-08-23 | 1996-07-09 | General Electric Co <Ge> | ステータベーン・セグメント及びタービンベーン・セグメント |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2953842B2 (ja) * | 1991-12-16 | 1999-09-27 | 東北電力株式会社 | タービン静翼 |
JP3188105B2 (ja) * | 1994-07-11 | 2001-07-16 | 三菱重工業株式会社 | ガスタービンの動翼 |
-
1997
- 1997-05-01 JP JP11384597A patent/JP3276305B2/ja not_active Expired - Fee Related
-
1998
- 1998-04-28 DE DE69821312T patent/DE69821312T2/de not_active Expired - Lifetime
- 1998-04-28 EP EP98917726A patent/EP0911488B1/en not_active Expired - Lifetime
- 1998-04-28 CA CA002261184A patent/CA2261184C/en not_active Expired - Lifetime
- 1998-04-28 WO PCT/JP1998/001958 patent/WO1998050684A1/ja active IP Right Grant
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04311604A (ja) * | 1991-04-11 | 1992-11-04 | Toshiba Corp | タービン静翼 |
JPH0565802A (ja) * | 1991-09-06 | 1993-03-19 | Toshiba Corp | ガスタービン |
JPH0693801A (ja) * | 1992-09-17 | 1994-04-05 | Hitachi Ltd | ガスタービン翼 |
JPH06257405A (ja) * | 1992-12-30 | 1994-09-13 | General Electric Co <Ge> | タービン |
JPH08177406A (ja) * | 1994-08-23 | 1996-07-09 | General Electric Co <Ge> | ステータベーン・セグメント及びタービンベーン・セグメント |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7168914B2 (en) * | 2001-07-11 | 2007-01-30 | Mitsubishi Heavy Industries, Ltd. | Gas turbine stationary blade |
Also Published As
Publication number | Publication date |
---|---|
EP0911488A4 (en) | 2000-11-29 |
DE69821312T2 (de) | 2005-08-04 |
DE69821312D1 (de) | 2004-03-04 |
JP3276305B2 (ja) | 2002-04-22 |
JPH10306706A (ja) | 1998-11-17 |
CA2261184A1 (en) | 1998-11-12 |
EP0911488A1 (en) | 1999-04-28 |
CA2261184C (en) | 2002-07-09 |
EP0911488B1 (en) | 2004-01-28 |
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