EP2237921A1 - Heizvorrichtung für eine turbinenschaufel und ein verfahren zum schweissen - Google Patents
Heizvorrichtung für eine turbinenschaufel und ein verfahren zum schweissenInfo
- Publication number
- EP2237921A1 EP2237921A1 EP09709179A EP09709179A EP2237921A1 EP 2237921 A1 EP2237921 A1 EP 2237921A1 EP 09709179 A EP09709179 A EP 09709179A EP 09709179 A EP09709179 A EP 09709179A EP 2237921 A1 EP2237921 A1 EP 2237921A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- airfoil
- heating loop
- platform
- turbine blade
- 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- Withdrawn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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/60—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
- B23K26/28—Seam welding of curved planar seams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/32—Bonding taking account of the properties of the material involved
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/001—Turbines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/34—Coated articles ; Surface treated articles
- B23K2101/35—Surface treated articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/18—Dissimilar materials
- B23K2103/26—Alloys of Nickel and Cobalt and Chromium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/50—Inorganic materials other than metals or composite materials
Definitions
- the invention relates to a heating device for a turbine blade and a method for welding.
- Components such as turbine blades are often welded to remelt cracks or to apply material. Since material is melted during welding, thermal stresses occur between the molten area and the colder unfused areas of the component. Therefore, the component is preheated to a certain temperature to reduce such stresses.
- the object is achieved by a device according to claim 1 and a method according to claim 12.
- FIG. 5 shows a gas turbine
- FIG. 6 is a perspective view of a turbine blade
- Figure 7 is a list of superalloys.
- FIG. 1 shows a heating device 1 according to the invention, which has a receptacle (not shown in more detail) for a turbine blade 4, 120, 130 (FIGS. 5, 6).
- the turbine blade 4, 120, 130 has an airfoil 406 (FIG. 6) and at least one blade platform 403 (FIG. 6). For a bucket 120, only one bucket platform 403 is present.
- the heating device 1 has a heating wire 41, which is guided around the turbine blade 4, 120, 130.
- the heating wire 41 extends both above the platform 403, preferably in the region of the blade leaf 406, and below the blade platform 403, ie in the region of the attachment region 400.
- two regions of the heating wire 41 of the turbine blade 120, 130 are arranged diagonally to each other.
- Figure 2 shows a view of Figure 1, which is rotated by 90 °.
- the heating wire 41 extends, as described in Figure 1, both above the blade platform 403 and below. Below preferably on the side on which a welding device 49 is arranged for welding.
- the heating loop 41 preferably extends above the blade platform 403 preferably on or near the blade platform 403 and / or preferably as close as possible to the blade blade 406.
- the heating wire 41 is arranged on the side of the blade leaf 406 which faces away from the welding device 49.
- the heating loop 41 runs below the blade platform 403, preferably below or close to the blade platform. mold 403 and / or preferably as close as possible to the blade root (400).
- a curved transition region 52 is welded between airfoil 406 and paddle platform 403.
- the temperature gradient extends from the transition 52 obliquely to the longitudinal axis 121 (FIG. 6) of the turbine blade 120 in the direction of the blade root 400.
- FIG. 3 shows a plan view of FIG. 1.
- the airfoil 406 is shown in cross section, which in its cross section gives 406 a small area of the surface of the blade platform 403.
- the airfoil 406 has an inwardly and outwardly curved surface, that is, a suction and a pressure side.
- the heating wire 41 is preferably curved in the region of the blade leaf 406 in accordance with this geometry, that is, it does not run in a straight line.
- the heating wire 41 may also preferably be curved, even if the fastening area
- the heating wire 41 may be routed above the airfoil 403 either along the pressure side (FIG. 3) or the suction side (FIG. 4).
- This heater 1 is preferably used in welding.
- a welding device 49 is used, which is arranged on the side of the turbine blade 120, 130, in which the heating wire 41 extends below the blade platform 403. It can be welded on the suction or pressure side. Accordingly, the heating loop 41 is arranged.
- a curved transition region 52 is welded between airfoil 406 and blade platform 403, which has a temperature gradient.
- the turbine blade 120, 130 has a DS or SX structure, and it is also preferable that a DS or SX structure is achieved in the welded region by the temperature gradient.
- a magnetic powder in particular a magnetic and dielectric powder is applied to the turbine blade 120, 130, which serves as a concentrator for the heating loop 41 during heating.
- powder is applied over the entire surface (but not the entire turbine blade 120, 130 or not the entire blade leaf 406) in relation to the heating loop 41. Welding areas are omitted.
- FIG. 5 shows by way of example a gas turbine 100 in a longitudinal partial section.
- the gas turbine 100 has inside a rotatably mounted about a rotation axis 102 rotor 103 with a shaft, which is also referred to as a turbine runner.
- a turbine runner Along the rotor 103 successively follow an intake housing 104, a compressor 105, a torus-like combustion chamber 110, in particular annular combustion chamber, with a plurality of coaxially arranged burners 107, a turbine 108 and the exhaust housing 109.
- the annular combustion chamber 110 communicates with an example annular hot gas channel 111th
- four turbine stages 112 connected in series form the turbine 108.
- Each turbine stage 112 is formed, for example, from two blade rings. In the flow direction of a working medium
- a row 125 formed of rotor blades 120 follows.
- the guide vanes 130 are fastened to an inner housing 138 of a stator 143, whereas the moving blades 120 of a row 125 are attached to the rotor 103 by means of a turbine disk 133, for example.
- a generator or work machine (not shown).
- air 105 is sucked in by the compressor 105 through the intake housing 104 and compressed.
- the compressed air provided at the turbine-side end of the compressor 105 is supplied to the burners 107 where it is mixed with a fuel.
- the mixture is then burned to form the working fluid 113 in the combustion chamber 110.
- the working medium 113 flows along the hot gas channel 111 past the guide vanes 130 and the rotor blades 120.
- the working medium 113 expands in a pulse-transmitting manner so that the rotor blades 120 drive the rotor 103 and drive the machine coupled to it.
- the components exposed to the hot working medium 113 are subject to thermal loads during operation of the gas turbine 100.
- the guide vanes 130 and rotor blades 120 of the first turbine stage 112, viewed in the flow direction of the working medium 113, are subjected to the greatest thermal stress in addition to the heat shield elements lining the annular combustion chamber 110.
- substrates of the components may have a directional structure, i. they are monocrystalline (SX structure) or have only longitudinal grains (DS structure).
- SX structure monocrystalline
- DS structure longitudinal grains
- iron-, nickel- or cobalt-based superalloys are used as the material for the components, in particular for the turbine blade 120, 130 and components of the combustion chamber 110.
- Such superalloys are known, for example, from EP 1 204 776 B1, EP 1 306 454, EP 1 319 729 A1, WO 99/67435 or WO 00/44949 known; These documents are part of the disclosure regarding the chemical composition of the alloys.
- the vane 130 has a guide vane foot (not shown here) facing the inner housing 138 of the turbine 108 and a vane head opposite the vane foot.
- the vane head faces the rotor 103 and fixed to a mounting ring 140 of the stator 143.
- FIG. 6 shows a perspective view of a moving blade 120 or guide blade 130 of a turbomachine that extends along a longitudinal axis 121.
- the turbomachine may be a gas turbine of an aircraft or a power plant for power generation, a steam turbine or a compressor.
- the blade 120, 130 has along the longitudinal axis 121 consecutively a fastening region 400, a blade platform 403 adjacent thereto and an airfoil 406 and a blade tip 415.
- the blade 130 may have at its blade tip 415 another platform (not shown).
- a blade root 183 is formed, which serves for attachment of the blades 120, 130 to a shaft or a disc (not shown).
- the blade root 183 is designed, for example, as a hammer head. Other designs as Christmas tree or Schwalbenschwanzfuß are possible.
- the blade 120, 130 has a leading edge 409 and a trailing edge 412 for a medium flowing past the blade 406.
- solid metallic materials in particular superalloys, are used in all regions 400, 403, 406 of the blade 120, 130.
- superalloys are known, for example, from EP 1 204 776 B1, EP 1 306 454, EP 1 319 729 A1, WO 99/67435 or WO 00/44949; These documents are part of the disclosure regarding the chemical composition of the alloy.
- the blade 120, 130 can be made by a casting process, also by directional solidification, by a forging process, by a milling process or combinations thereof.
- Workpieces with a monocrystalline structure or structures are used as components for machines which are exposed to high mechanical, thermal and / or chemical stresses during operation.
- the blades 120, 130 may have coatings against corrosion or oxidation, e.g. M is at least one element of the group iron (Fe), cobalt (Co), nickel (Ni), X is an active element and stands for yttrium (Y) and / or silicon and / or at least one element of the rare ones Earth, or hafnium (Hf)).
- M is at least one element of the group iron (Fe), cobalt (Co), nickel (Ni)
- X is an active element and stands for yttrium (Y) and / or silicon and / or at least one element of the rare ones Earth, or hafnium (Hf)).
- Such alloys are known from EP 0 486 489 B1, EP 0 786 017 B1, EP 0 412 397 B1 or EP 1 306 454 A1, which should be part of this disclosure with regard to the chemical composition of the alloy.
- the density is preferably 95% of the theoretical density.
- the layer composition comprises Co-30Ni-28Cr-8A1-0, 6Y-0, 7Si or Co-28Ni-24Cr-10Al-0, 6Y.
- nickel-based protective layers such as Ni-10Cr-12Al-0.6Y-3Re or Ni-12Co-21Cr-IIAl-O, 4Y-2Re or Ni-25Co-17Cr-10A1-0, 4Y-1 are also preferably used , 5Re.
- thermal barrier coating which is preferably the outermost layer, and consists for example of Zr ⁇ 2, Y2 ⁇ 3-Zr ⁇ 2, ie it is not, partially ⁇ or fully stabilized by yttria and / or calcium oxide and / or magnesium oxide.
- the thermal barrier coating covers the entire MCrAlX layer.
- Suitable coating processes such as electron beam evaporation (EB-PVD), produce stalk-shaped grains in the thermal barrier coating.
- EB-PVD electron beam evaporation
- the thermal barrier coating may have porous, micro- or macro-cracked grains for better thermal shock resistance.
- the thermal barrier coating is therefore preferably more porous than the MCrAlX layer.
- the blade 120, 130 may be hollow or solid. If the blade 120, 130 is to be cooled, it is hollow and may still film cooling holes 418 (indicated by dashed lines) on.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008008049A DE102008008049A1 (de) | 2008-02-08 | 2008-02-08 | Heizvorrichtung für eine Turbinenschaufel und ein Verfahren zum Schweißen |
| PCT/EP2009/050314 WO2009098106A1 (de) | 2008-02-08 | 2009-01-13 | Heizvorrichtung für eine turbinenschaufel und ein verfahren zum schweissen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2237921A1 true EP2237921A1 (de) | 2010-10-13 |
Family
ID=40637837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09709179A Withdrawn EP2237921A1 (de) | 2008-02-08 | 2009-01-13 | Heizvorrichtung für eine turbinenschaufel und ein verfahren zum schweissen |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20110000891A1 (de) |
| EP (1) | EP2237921A1 (de) |
| DE (1) | DE102008008049A1 (de) |
| WO (1) | WO2009098106A1 (de) |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH667611A5 (de) * | 1985-02-28 | 1988-10-31 | Bbc Brown Boveri & Cie | Verfahren zum herstellen eines regelrades fuer den hochdruckrotor einer dampfturbine. |
| US4739146A (en) * | 1986-02-25 | 1988-04-19 | Metallurgical Industries, Inc. | Method for applying a weld bead to a thin section of a substrate |
| DE58908611D1 (de) | 1989-08-10 | 1994-12-08 | Siemens Ag | Hochtemperaturfeste korrosionsschutzbeschichtung, insbesondere für gasturbinenbauteile. |
| DE3926479A1 (de) | 1989-08-10 | 1991-02-14 | Siemens Ag | Rheniumhaltige schutzbeschichtung, mit grosser korrosions- und/oder oxidationsbestaendigkeit |
| WO1996012049A1 (de) | 1994-10-14 | 1996-04-25 | Siemens Aktiengesellschaft | Schutzschicht zum schutz eines bauteils gegen korrosion, oxidation und thermische überbeanspruchung sowie verfahren zu ihrer herstellung |
| EP0892090B1 (de) | 1997-02-24 | 2008-04-23 | Sulzer Innotec Ag | Verfahren zum Herstellen von einkristallinen Strukturen |
| EP0861927A1 (de) | 1997-02-24 | 1998-09-02 | Sulzer Innotec Ag | Verfahren zum Herstellen von einkristallinen Strukturen |
| EP1306454B1 (de) | 2001-10-24 | 2004-10-06 | Siemens Aktiengesellschaft | Rhenium enthaltende Schutzschicht zum Schutz eines Bauteils gegen Korrosion und Oxidation bei hohen Temperaturen |
| WO1999067435A1 (en) | 1998-06-23 | 1999-12-29 | Siemens Aktiengesellschaft | Directionally solidified casting with improved transverse stress rupture strength |
| US6231692B1 (en) | 1999-01-28 | 2001-05-15 | Howmet Research Corporation | Nickel base superalloy with improved machinability and method of making thereof |
| DE50006694D1 (de) | 1999-07-29 | 2004-07-08 | Siemens Ag | Hochtemperaturbeständiges bauteil und verfahren zur herstellung des hochtemperaturbeständigen bauteils |
| DE50112339D1 (de) | 2001-12-13 | 2007-05-24 | Siemens Ag | Hochtemperaturbeständiges Bauteil aus einkristalliner oder polykristalliner Nickel-Basis-Superlegierung |
| DE10328596A1 (de) * | 2003-06-25 | 2005-01-13 | Mtu Aero Engines Gmbh | Verfahren und Vorrichtung zum Laserschweißen von Bauteilen |
| EP1595968A1 (de) * | 2004-04-30 | 2005-11-16 | Siemens Aktiengesellschaft | Wärmebehandlungsverfahren für einkristalline oder direktional verfestigte Bauteile |
| US20050274701A1 (en) * | 2004-06-10 | 2005-12-15 | United Technologies Corporation | Homogeneous welding via pre-heating for high strength superalloy joining and material deposition |
| DE102004043746B4 (de) * | 2004-09-10 | 2008-09-25 | Mtu Aero Engines Gmbh | Verfahren zur Herstellung eines mit Hohlschaufeln integral beschaufelten Gasturbinenrotors |
-
2008
- 2008-02-08 DE DE102008008049A patent/DE102008008049A1/de not_active Ceased
-
2009
- 2009-01-13 WO PCT/EP2009/050314 patent/WO2009098106A1/de not_active Ceased
- 2009-01-13 US US12/866,302 patent/US20110000891A1/en not_active Abandoned
- 2009-01-13 EP EP09709179A patent/EP2237921A1/de not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009098106A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20110000891A1 (en) | 2011-01-06 |
| WO2009098106A1 (de) | 2009-08-13 |
| DE102008008049A1 (de) | 2009-08-20 |
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Legal Events
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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: 20100719 |
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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 TR |
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| AX | Request for extension of the european patent |
Extension state: AL BA RS |
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| DAX | Request for extension of the european patent (deleted) | ||
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SIEMENS AKTIENGESELLSCHAFT Owner name: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWAN |
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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: 20150801 |