EP2349608A1 - Verfahren zum giesstechnischen herstellen einer schaufel sowie schaufel für eine gasturbine - Google Patents
Verfahren zum giesstechnischen herstellen einer schaufel sowie schaufel für eine gasturbineInfo
- Publication number
- EP2349608A1 EP2349608A1 EP09755889A EP09755889A EP2349608A1 EP 2349608 A1 EP2349608 A1 EP 2349608A1 EP 09755889 A EP09755889 A EP 09755889A EP 09755889 A EP09755889 A EP 09755889A EP 2349608 A1 EP2349608 A1 EP 2349608A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- longitudinal direction
- core body
- extending
- tip
- 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.)
- Withdrawn
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
- F01D5/14—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/108—Installation of cores
-
- 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
- F05D2230/00—Manufacture
- F05D2230/20—Manufacture essentially without removing material
- F05D2230/21—Manufacture essentially without removing material by casting
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49236—Fluid pump or compressor making
- Y10T29/49243—Centrifugal type
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49236—Fluid pump or compressor making
- Y10T29/49245—Vane type or other rotary, e.g., fan
Definitions
- the present invention relates to the field of gas turbine technology. It relates to a method for the technical production of a blade for a gas turbine according to the preamble of claim 1. It further relates to a blade for a gas turbine.
- Blades of gas turbines which are typically exposed to very high hot gas temperatures, are usually made by casting from high strength alloys (e.g., nickel base alloys).
- high strength alloys e.g., nickel base alloys
- the blade root forth the castable alloy is introduced into the mold.
- a cooling air channel is created in the cast blade body, which extends in the blade longitudinal direction through the blade body and can lead cooling air from the blade root to different points of the blade for cooling purposes.
- FIG. 1 Such a blade is shown in FIG. 1:
- the blade 10 of FIG. 1 comprises an airfoil blade 11 which extends in the blade longitudinal direction 25 and merges at the lower end into a blade root 12, above which a platform 13 is arranged, which forms the hot gas duct of the gas turbine limited to the inside.
- At the upper end of the blade 10 ends in a blade tip 14, on which a shroud segment 15 is arranged, which limits the hot gas channel to the outside.
- an upwardly projecting rib 16 running in the circumferential direction of the machine can be provided be provided in the interior of the blade 10, a single cooling air channel 17 extending in the blade longitudinal direction 25 is indicated by dash-dotted lines, which can be supplied with cooling air from below via a cooling air inlet 17 '.
- the invention aims to remedy this situation. It is therefore an object of the invention to provide a method for the casting manufacturing of an elongated, thin-walled gas turbine blade, which avoids the disadvantages of known methods and is characterized in particular by an error-free design of the shroud segment at the same time uniform properties of the blade as a whole.
- the object is solved by the entirety of the features of claim 1.
- Essential for the inventive method is that during casting of the blade, the blade material exclusively from the blade root forth in the for provided mold is introduced, and that for forming the cooling air duct during casting of the blade, a core body is used, which has towards the blade tip means for increasing the Giessqueritess there.
- the means for increasing the available Giessqueritess comprise at least one extending in the blade longitudinal direction of the core body groove.
- the means for increasing the casting cross section preferably comprise two grooves running in the blade longitudinal direction of the core body, one of which is arranged on the side of the core body facing the suction side of the blade and the other on the side of the core body facing the pressure side of the blade.
- the casting process is particularly favorable if the gutters each have a depth profile which is similar to the course of a ski jumping hill. This ensures that the casting material can flow more successfully in the area of the delicate zone.
- the two grooves are arranged offset on the core body in the transverse direction against each other.
- the blade according to the invention for a gas turbine comprises an elongated blade leaf extending in a blade longitudinal direction, which at the lower end merges into a blade root and has a shroud segment at the blade tip, and is traversed internally by a single cooling air channel extending in the blade longitudinal direction from the blade root to the blade tip, wherein the blade is produced by the inventive method.
- An embodiment of the blade is characterized in that the blade on the inner sides of the pressure side and the suction side blade wall toward the blade tip each has a rib extending in the blade longitudinal direction, wherein the two ribs are arranged offset in the transverse direction against each other and each having a rounded, preferably circular arc-shaped cross-sectional profile ,
- Fig. 1 in a side view of a gas turbine blade, as to
- Fig. 2 shows the cross section through a blade of the type shown in Fig. 1 along the local level N-Il according to a preferred embodiment of the invention
- Fig. 3 shows a core body for the method according to the invention. Ways to carry out the invention
- the two grooves 24 are arranged offset on the core body 22 in the transverse direction against each other.
- the ribs 20, 21, which can be seen in cross-section in FIG. 2 are formed on the inner sides of the blade walls 28, which are offset in the transverse direction between the front edge 18 and the rear edge 19.
- the grooves 24 as well as the resulting ribs 20, 21 have a rounded, preferably circular arc-shaped cross-sectional profile. This configuration of the profiles ensures an optimized supply of material into the region of the blade tip 14, without the flow properties in the cooling air channel 17 being substantially impaired.
- the heat transfer surface between the cooling air and the blade wall 28 is additionally increased, thereby improving the cooling of the blade walls 28th
- the blade has a plurality of individual or mutually communicating cooling channels running in the longitudinal direction, then the resulting branching of the core body in the longitudinal direction of the blade tip in each case corresponding gutters, which fulfill the final purpose described above.
- the invention provides the following advantages: The dimensional stability of the casting mold is supported.
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 |
|---|---|---|---|
| CH01837/08A CH700000A1 (de) | 2008-11-25 | 2008-11-25 | Verfahren zum giesstechnischen Herstellen einer Schaufel sowie Schaufel für eine Gasturbine. |
| PCT/EP2009/065189 WO2010060819A1 (de) | 2008-11-25 | 2009-11-16 | Verfahren zum giesstechnischen herstellen einer schaufel sowie schaufel für eine gasturbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2349608A1 true EP2349608A1 (de) | 2011-08-03 |
Family
ID=40451387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09755889A Withdrawn EP2349608A1 (de) | 2008-11-25 | 2009-11-16 | Verfahren zum giesstechnischen herstellen einer schaufel sowie schaufel für eine gasturbine |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US8382433B2 (de) |
| EP (1) | EP2349608A1 (de) |
| CH (1) | CH700000A1 (de) |
| WO (1) | WO2010060819A1 (de) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4809764A (en) * | 1988-03-28 | 1989-03-07 | Pcc Airfoils, Inc. | Method of casting a metal article |
| GB2228540B (en) * | 1988-12-07 | 1993-03-31 | Rolls Royce Plc | Cooling of turbine blades |
| GB9121364D0 (en) * | 1991-10-09 | 1991-11-20 | Rolls Royce Plc | A mould for casting components |
| GB2290833B (en) * | 1994-07-02 | 1998-08-05 | Rolls Royce Plc | Turbine blade |
| US5785496A (en) * | 1997-02-24 | 1998-07-28 | Mitsubishi Heavy Industries, Ltd. | Gas turbine rotor |
| GB0226559D0 (en) * | 2002-11-14 | 2002-12-18 | Rolls Royce Plc | Investment moulding process and apparatus |
| US7377746B2 (en) * | 2005-02-21 | 2008-05-27 | General Electric Company | Airfoil cooling circuits and method |
| GB0700499D0 (en) * | 2007-01-11 | 2007-02-21 | Rolls Royce Plc | Aerofoil configuration |
| US20090314450A1 (en) * | 2008-06-24 | 2009-12-24 | Garlock Robert M | Method and apparatus for casting metal articles |
-
2008
- 2008-11-25 CH CH01837/08A patent/CH700000A1/de not_active Application Discontinuation
-
2009
- 2009-11-16 WO PCT/EP2009/065189 patent/WO2010060819A1/de not_active Ceased
- 2009-11-16 EP EP09755889A patent/EP2349608A1/de not_active Withdrawn
-
2011
- 2011-05-23 US US13/113,630 patent/US8382433B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2010060819A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20110243756A1 (en) | 2011-10-06 |
| WO2010060819A1 (de) | 2010-06-03 |
| US8382433B2 (en) | 2013-02-26 |
| CH700000A1 (de) | 2010-05-31 |
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Legal Events
| Date | Code | Title | Description |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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| 17P | Request for examination filed |
Effective date: 20110517 |
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| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR |
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| DAX | Request for extension of the european patent (deleted) | ||
| 17Q | First examination report despatched |
Effective date: 20120504 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: GENERAL ELECTRIC TECHNOLOGY GMBH |
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| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
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| INTG | Intention to grant announced |
Effective date: 20160920 |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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| 18D | Application deemed to be withdrawn |
Effective date: 20170131 |