EP2414640A1 - Schaufel für eine gasturbine - Google Patents
Schaufel für eine gasturbineInfo
- Publication number
- EP2414640A1 EP2414640A1 EP10706671A EP10706671A EP2414640A1 EP 2414640 A1 EP2414640 A1 EP 2414640A1 EP 10706671 A EP10706671 A EP 10706671A EP 10706671 A EP10706671 A EP 10706671A EP 2414640 A1 EP2414640 A1 EP 2414640A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shroud
- cooling
- side rails
- segment
- blade according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/22—Blade-to-blade connections, e.g. for damping vibrations
- F01D5/225—Blade-to-blade connections, e.g. for damping vibrations by shrouding
-
- 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
- F05D2260/202—Heat transfer, e.g. cooling by film cooling
Definitions
- the present invention relates to the field of gas turbine technology. It relates to a blade for a gas turbine according to the preamble of claim 1.
- Shroud segments of the blades of a blade row together form a circumferential shroud.
- the shroud segments are provided with running on the side edges, upstanding side rails, which improve the tightness of the shroud against the hot gas duct of the turbine.
- the cooling of the shroud segments or the shroud no statement is made.
- Sealing rib are equipped, in which a likewise circumferential slot is provided.
- An air flow supplied there in the bottom region of the slot exits at the upper edge of the sealing rib and mixes in the gap between the upper edge and the adjacent channel wall with a leakage air flow.
- the air flow supplied into the slot can be obtained from a cooling air flow, which is guided through the shroud segment. At the center of consideration here However, the reduction of leakage losses, but not the cooling of the shroud segment.
- the invention aims to remedy this situation. It is therefore an object of the invention to provide a gas turbine blade with cooled shroud segment, in which the cooling of the side rails is maximized.
- Essential for the invention is that to improve the cooling in the side rails in the side rails rail-parallel, upwardly open slots are arranged, which exits via the shroud segment from the interior of the airfoil zoom introduced cooling air into the space above the shroud segment.
- this is achieved according to an embodiment of the invention in that on the upper side of the shroud segment a plurality of transverse to the side rails cooling tubes are arranged, which emanate from a arranged between the side rails centerpiece and from there can be acted upon with cooling air, and which in the End the side rails and connect with the slots in the side rails.
- Middle piece is arranged in the middle between the side rails.
- the middle piece can also be arranged offset to the middle between the side rails.
- the cooling tubes are parallel to each other, with the centerpiece extending substantially parallel to the side rails.
- the cooling tubes can extend in the circumferential direction of the shroud. But it is also conceivable that the cooling tubes extend obliquely to the circumferential direction of the shroud.
- cooling tubes each have a cooling hole and are designed for convective cooling of the shroud segment, and that the cooling tubes are integrally formed on the shroud segment.
- a further embodiment of the invention is characterized in that the cooling tubes are arranged with gap of the shroud segments adjacent vanes.
- the shroud segment is delimited in the axial direction by circumferentially extending wall segments, wherein the cooling air emerging from the slots is supplied via cooling holes in the region of the wall segments and the side rails.
- a further embodiment is characterized in that the shroud segment is delimited in the axial direction by circumferentially extending wall segments, that is provided parallel to the wall segments arranged in the middle between the wall segments intermediate wall segment, and that between the intermediate wall segment and the wall segments in the Side rails each have a slot is provided.
- the slots of a side rail can each be connected to one another by a cooling bore extending in the side rail.
- film cooling holes extend from the cooling bores supplying the slots and open into the hot gas channel on the underside of the shroud segment.
- FIG. 1 is a simplified perspective view of a provided with a roof segment with cooling holes blade tip one
- Fig. 2 is a comparable to Fig. 1 blade with inclined
- FIG. 3 is a comparison with FIG. 1 comparable representation with a
- Fig. 4 shows the section through the shroud segment of the blade of Fig. 1 in the
- Fig. 5 shows the section through the shroud segment of the blade of Fig. 1 in the
- FIG. 6 shows the section through the shroud segment of the blade of Figure 3 in the plane Vl-Vl, wherein the center piece, from which the cooling holes emanate, lies in the middle.
- Fig. 7 in detail a possible connection between two adjacent
- Fig. 8 is an alternative to Figure 3 way to supply the slots with cooling air.
- Fig. 9 is a plan view of a specific arrangement of the cooling holes of adjacent shroud segments.
- Fig. 12 shows the distribution of the film cooling holes
- Fig. 1, 2, 4 and 5 the blade tip of a gas turbine blade provided with a shroud segment is shown in perspective view or in cross section.
- the blade 10 ' of which only the upper part of the airfoil 11 is shown with the shroud segment 12', has a cooled shroud segment 12 '.
- the shroud segment 12 ' which is approximately rectangular in area in the base area is delimited on two opposite sides by comparatively high wall segments 14 and 15, which together with the wall segments of the other blades of a complete row of blades form annular walls, between which a shroud cavity forms against the penetration of hot gas from the underlying hot gas channel is sealed.
- comparatively high wall segments 14 and 15 which together with the wall segments of the other blades of a complete row of blades form annular walls, between which a shroud cavity forms against the penetration of hot gas from the underlying hot gas channel is sealed.
- upwardly projecting side rails 16, 17 are formed, with which adjacent shroud segments of the blade row abut each other.
- a rib-like, internally hollow center piece 13 is arranged parallel thereto which is in communication with the inside of the airfoil 11 in the radial direction extending cooling air channels. From the middle piece 13, which runs parallel or quasi-parallel to the side rails 16, 17, extending to the side rails 16, 17 on both sides of the center piece on the upper side of the shroud segment 12 'integrally formed cooling tubes 18 on the side rails 16, 17th To and ends at a distance in front of the side rails 16, 17.
- four parallel cooling tubes 18 are provided on both sides of the center piece 13, which extend parallel or quasi-parallel to the wall segments 14, 15. But they can also be oriented obliquely to the wall segments 14, 15 (Fig. 2).
- the cooling air flows out, which flows through the cooling holes 21 in the interior of the cooling tubes 18 and so convective the shroud segment 12 'cools.
- the cooling air flowing through the cooling tubes 18 comes from the cooling air supply 20 in the interior of the center piece 13, with which the cooling holes 21 are in communication, and in the below from a cooling air flow 25 occurs.
- the shroud segment 12 of the blade 10 from FIGS. 3 and 6 is configured such that the side rails 16, 17 are now also cooled convectively.
- the cooling tubes 18 are now performed under the task of the gap directly to the side rails 16, 17.
- a rail parallel slot 23, 24 is introduced, which is in communication with the cooling holes 21 of the cooling tubes 18.
- These slots can also be arranged quasi-rail parallel, which also applies to the slots 23.1, 23.2 of FIG.
- the cooling air flowing through the cooling holes 21 exits into the slots 23, 24 and from there into the shroud cavity.
- the side rails 16, 17 on the length of the slots 23, 24 are effectively cooled convectively, without an additional, the effectiveness of the turbine impairing cooling air mass flow is required.
- the distributed cooling tubes 18 ensure that the slots 23, 24 are supplied uniformly over its entire length with cooling air.
- the cooling tubes 18 are formed in the embodiment shown in Fig. 3 and 6 on the upper side of the shroud segment 12 (when casting the blade 10) and thus have a close thermal coupling to the body of the shroud segment 12.
- the cooling tubes 18 can thereby run parallel to the wall segments 14, 15, as shown in Fig. 3. But they can also be oriented as shown in FIG. 2 obliquely to the wall segments 14, 15.
- the middle piece - as shown in Fig. 6 - be located exactly in the middle between the wall segments 14, 15. But it can also be offset from the middle analogous to FIG.
- a strip-shaped seal 26 is inserted as shown in FIG. 7 between the adjoining shroud segments of adjacent blades 10a and 10b with their cooling holes 21a and 21b and their slots 24a and 23b which prevents the hot gases from entering the shroud cavity from the hot gas channel . with special needs.
- cooling bores 27, 28 can be introduced into the wall segments 14, 15 or the side rails 16, 17, through which cooling air reaches the slots while still causing a convective cooling of the thickened shroud areas.
- cooling holes can then - as shown in Fig. 11 - film cooling holes 30 depart, which in the below
- a cooling bore 28 running in the side rails 16, 17 can also connect two separate slots 32.1 and 23.2 with one another, if the shroud segment has a parallel between them
- Wall segments 14, 15 arranged intermediate wall segment 31 is provided.
- an extended groove-shaped gap 29 can be provided, which is filled with cooling air from the cooling holes 21a, 21b and thus prevents the penetration of hot gases.
- the cooling tubes 18a, 18b are then arranged "in gap" with respect to the adjacent blade as shown in FIG. LIST OF REFERENCE NUMBERS
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH00502/09A CH700686A1 (de) | 2009-03-30 | 2009-03-30 | Schaufel für eine gasturbine. |
| PCT/EP2010/052867 WO2010112299A1 (de) | 2009-03-30 | 2010-03-05 | Schaufel für eine gasturbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2414640A1 true EP2414640A1 (de) | 2012-02-08 |
| EP2414640B1 EP2414640B1 (de) | 2020-05-27 |
Family
ID=40677818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10706671.4A Active EP2414640B1 (de) | 2009-03-30 | 2010-03-05 | Schaufel für eine gasturbine |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US9464529B2 (de) |
| EP (1) | EP2414640B1 (de) |
| AU (1) | AU2010230482B2 (de) |
| CH (1) | CH700686A1 (de) |
| RU (1) | RU2543641C2 (de) |
| WO (1) | WO2010112299A1 (de) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8807927B2 (en) * | 2011-09-29 | 2014-08-19 | General Electric Company | Clearance flow control assembly having rail member |
| US20130315719A1 (en) * | 2012-05-25 | 2013-11-28 | General Electric Company | Turbine Shroud Cooling Assembly for a Gas Turbine System |
| US9683446B2 (en) * | 2013-03-07 | 2017-06-20 | Rolls-Royce Energy Systems, Inc. | Gas turbine engine shrouded blade |
| US9759070B2 (en) * | 2013-08-28 | 2017-09-12 | General Electric Company | Turbine bucket tip shroud |
| US9556741B2 (en) | 2014-02-13 | 2017-01-31 | Pratt & Whitney Canada Corp | Shrouded blade for a gas turbine engine |
| EP3269932A1 (de) * | 2016-07-13 | 2018-01-17 | MTU Aero Engines GmbH | Gasturbinenschaufel mit deckband |
| US10947898B2 (en) | 2017-02-14 | 2021-03-16 | General Electric Company | Undulating tip shroud for use on a turbine blade |
| US10704406B2 (en) | 2017-06-13 | 2020-07-07 | General Electric Company | Turbomachine blade cooling structure and related methods |
| US11060407B2 (en) | 2017-06-22 | 2021-07-13 | General Electric Company | Turbomachine rotor blade |
| US10301943B2 (en) | 2017-06-30 | 2019-05-28 | General Electric Company | Turbomachine rotor blade |
| US10577945B2 (en) | 2017-06-30 | 2020-03-03 | General Electric Company | Turbomachine rotor blade |
| US10590777B2 (en) | 2017-06-30 | 2020-03-17 | General Electric Company | Turbomachine rotor blade |
| US10753207B2 (en) | 2017-07-13 | 2020-08-25 | General Electric Company | Airfoil with tip rail cooling |
| US10641108B2 (en) * | 2018-04-06 | 2020-05-05 | United Technologies Corporation | Turbine blade shroud for gas turbine engine with power turbine and method of manufacturing same |
| US11255198B1 (en) * | 2021-06-10 | 2022-02-22 | General Electric Company | Tip shroud with exit surface for cooling passages |
| JP7808948B2 (ja) * | 2021-10-25 | 2026-01-30 | 三菱重工業株式会社 | 翼、及びブリスク翼 |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1605335A (en) * | 1975-08-23 | 1991-12-18 | Rolls Royce | A rotor blade for a gas turbine engine |
| GB9224241D0 (en) * | 1992-11-19 | 1993-01-06 | Bmw Rolls Royce Gmbh | A turbine blade arrangement |
| US5482435A (en) * | 1994-10-26 | 1996-01-09 | Westinghouse Electric Corporation | Gas turbine blade having a cooled shroud |
| GB2298246B (en) * | 1995-02-23 | 1998-10-28 | Bmw Rolls Royce Gmbh | A turbine-blade arrangement comprising a shroud band |
| US5779447A (en) * | 1997-02-19 | 1998-07-14 | Mitsubishi Heavy Industries, Ltd. | Turbine rotor |
| US5785496A (en) * | 1997-02-24 | 1998-07-28 | Mitsubishi Heavy Industries, Ltd. | Gas turbine rotor |
| JP3510467B2 (ja) * | 1998-01-13 | 2004-03-29 | 三菱重工業株式会社 | ガスタービンの動翼 |
| DE69931088T2 (de) * | 1998-02-04 | 2006-12-07 | Mitsubishi Heavy Industries, Ltd. | Gasturbinenlaufschaufel |
| DE59912323D1 (de) * | 1998-12-24 | 2005-09-01 | Alstom Technology Ltd Baden | Turbinenschaufel mit aktiv gekühltem Deckbandelememt |
| US6761534B1 (en) * | 1999-04-05 | 2004-07-13 | General Electric Company | Cooling circuit for a gas turbine bucket and tip shroud |
| DE19963377A1 (de) * | 1999-12-28 | 2001-07-12 | Abb Alstom Power Ch Ag | Turbinenschaufel mit aktiv gekühltem Deckbandelement |
| GB2413160B (en) * | 2004-04-17 | 2006-08-09 | Rolls Royce Plc | Turbine rotor blades |
| EP1591625A1 (de) * | 2004-04-30 | 2005-11-02 | ALSTOM Technology Ltd | Deckband für eine Gasturbinenschaufel |
| US7284954B2 (en) * | 2005-02-17 | 2007-10-23 | Parker David G | Shroud block with enhanced cooling |
| JP4628865B2 (ja) * | 2005-05-16 | 2011-02-09 | 株式会社日立製作所 | ガスタービン動翼とそれを用いたガスタービン及びその発電プラント |
| RU60631U1 (ru) * | 2006-08-21 | 2007-01-27 | Открытое акционерное общество "Научно-производственное объединение "Сатурн" | Бандажная полка лопатки газотурбинного двигателя |
| US7762774B2 (en) * | 2006-12-15 | 2010-07-27 | Siemens Energy, Inc. | Cooling arrangement for a tapered turbine blade |
| US7568882B2 (en) * | 2007-01-12 | 2009-08-04 | General Electric Company | Impingement cooled bucket shroud, turbine rotor incorporating the same, and cooling method |
-
2009
- 2009-03-30 CH CH00502/09A patent/CH700686A1/de not_active Application Discontinuation
-
2010
- 2010-03-05 AU AU2010230482A patent/AU2010230482B2/en not_active Ceased
- 2010-03-05 RU RU2011143766/06A patent/RU2543641C2/ru active
- 2010-03-05 EP EP10706671.4A patent/EP2414640B1/de active Active
- 2010-03-05 WO PCT/EP2010/052867 patent/WO2010112299A1/de not_active Ceased
-
2011
- 2011-09-26 US US13/245,707 patent/US9464529B2/en active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2010112299A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| RU2543641C2 (ru) | 2015-03-10 |
| EP2414640B1 (de) | 2020-05-27 |
| WO2010112299A1 (de) | 2010-10-07 |
| RU2011143766A (ru) | 2013-05-10 |
| AU2010230482A1 (en) | 2011-10-13 |
| US20120070309A1 (en) | 2012-03-22 |
| CH700686A1 (de) | 2010-09-30 |
| US9464529B2 (en) | 2016-10-11 |
| AU2010230482B2 (en) | 2014-12-04 |
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