EP2831376A1 - Turbine blade - Google Patents

Turbine blade

Info

Publication number
EP2831376A1
EP2831376A1 EP13712793.2A EP13712793A EP2831376A1 EP 2831376 A1 EP2831376 A1 EP 2831376A1 EP 13712793 A EP13712793 A EP 13712793A EP 2831376 A1 EP2831376 A1 EP 2831376A1
Authority
EP
European Patent Office
Prior art keywords
platform
turbine blade
blade according
elements
platform elements
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
Application number
EP13712793.2A
Other languages
German (de)
French (fr)
Other versions
EP2831376B1 (en
Inventor
Herbert Brandl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ansaldo Energia IP UK Ltd
Original Assignee
Alstom Technology AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Alstom Technology AG filed Critical Alstom Technology AG
Priority to EP13712793.2A priority Critical patent/EP2831376B1/en
Publication of EP2831376A1 publication Critical patent/EP2831376A1/en
Application granted granted Critical
Publication of EP2831376B1 publication Critical patent/EP2831376B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F01D5/147—Construction, i.e. structural features, e.g. of weight-saving hollow blades
    • 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
    • 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
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/005—Sealing means between non relatively rotating elements
    • F01D11/006—Sealing the gap between rotor blades or blades and rotor
    • F01D11/008—Sealing the gap between rotor blades or blades and rotor by spacer elements between the blades, e.g. independent interblade platforms
    • 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
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/3007—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type
    • 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
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/32—Locking, e.g. by final locking blades or keys
    • F01D5/326—Locking of axial insertion type blades by other means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/57—Seals
    • 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
    • F05D2230/50—Building or constructing in particular ways
    • 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
    • F05D2230/50—Building or constructing in particular ways
    • F05D2230/51—Building or constructing in particular ways in a modular way, e.g. using several identical or complementary parts or features
    • 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
    • F05D2240/55—Seals
    • 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
    • F05D2240/55—Seals
    • F05D2240/57—Leaf seals
    • 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
    • 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
    • F05D2260/30—Retaining components in desired mutual position
    • 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
    • F05D2260/30—Retaining components in desired mutual position
    • F05D2260/31—Retaining bolts or nuts
    • 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
    • F05D2260/30—Retaining components in desired mutual position
    • F05D2260/36—Retaining components in desired mutual position by a form fit connection, e.g. by interlocking
    • 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
    • F05D2260/96—Preventing, counteracting or reducing vibration or noise

Definitions

  • the present invention relates to the field of turbomachines. It relates to a turbine blade according to the preamble of claim 1, as it is used as a guide or blade, especially in gas turbines.
  • Blades for gas turbines which are used in the compressor or turbine part as guide or moving blades, are usually produced as a part by forging or investment casting. This is especially true for
  • Blades having a platform and / or shroud segment.
  • Document EP 2 189 626 A1 discloses a rotor blade arrangement for a gas turbine, which blade arrangement can be fastened to a blade carrier and in each case comprises an airfoil element and a platform element, wherein the platform elements of a blade row form a continuous inner cover strip. A reduced stress is achieved there by the blade element and platform element as separate elements
  • Mounting side can be attached to the rotor.
  • the turbine blade according to the invention comprises an airfoil having a front edge and a trailing edge, which merges via a shank into a blade root designed for fastening the turbine blade, and a platform which is arranged at the lower end of the airfoil to delimit a flow channel, the platform being separate
  • Component is formed and positively connected to the airfoil. It is characterized by the fact that the platform consists of several individual
  • the platform is composed of two
  • Composite platform elements Another embodiment of the invention is characterized in that the two platform elements abut in the assembled state with connecting surfaces in a parting plane which extends from the leading edge and the trailing edge of the airfoil in the axial direction to the associated edge of the platform.
  • the platform elements are each provided with outgoing from the parting plane recesses, which form in the assembled state adapted to the profile of the airfoil opening for the passing through the platform airfoil.
  • the platform is sealed to the airfoil.
  • a circumferential sealing groove is introduced into the platform elements to seal against the airfoil along the opening, which receives a suitable seal.
  • the two are
  • a sealing groove is for sealing in the parting plane
  • a further embodiment of the invention is characterized in that the two platform elements are detachably connected to each other.
  • the two platform elements can be screwed or riveted together.
  • aligned on the two platform elements parallel to the parting plane and abutting in the parting plane flange portions are formed, through which the two platform elements are screwed or riveted together.
  • the two are
  • Platform elements locked together by locking means In particular, the platform elements in the assembled state overlap each other with overlapping sections, wherein in the overlapping area between the overlapping sections a locking channel is formed, and the locking channel is filled with a filling.
  • the platform is attached to the turbine blade. In particular, the platform is hooked to the turbine blade.
  • the platform or the platform elements are with hooks
  • Turbine blade is hooked (are).
  • the platform or the platform elements may be materially connected to the turbine blade.
  • the platform or the platform elements may be materially connected to the turbine blade.
  • Platform elements connected by means of a cast into a locking channel filling with the turbine blade such that the connection surfaces of a portion of the turbine blade and the platform or platform elements are provided with opposing recesses which together form a cavity, which is suitable with a solidifying
  • Fillers for example. A molten metal to be filled.
  • Fig. 1 in a perspective view one of two individual
  • Fig. 2 is a perspective view of a turbine blade with a
  • FIG. 3 shows in a sectional view the sealing of a platform element against the blade in the arrangement according to FIG. 2;
  • Fig. 4 in the side view (a) and the top view from above (b) an embodiment of a bolted platform according to the invention;
  • FIG. 6 shows an alternative embodiment of the attachment and sealing of a platform element against the airfoil in the
  • FIG. 2 shows in a perspective view a turbine blade with a platform according to an exemplary embodiment of the invention.
  • the turbine blade 10 which may be, for example, a blade or vane of a gas turbine, comprises an airfoil 1 1, which ends at the top in a blade tip 12 and has a front edge 13 and a trailing edge 14.
  • the blade 1 1 goes down to a shaft 15, to which a blade root 16 connects, in a conventional manner
  • Tannenbaumartig is formed to be used in a corresponding receptacle on the rotor.
  • the blade 1 1 is enclosed at its lower end by a platform 17, which is composed according to FIG. 1 of two separate platform elements 17 a and 17 b in a parting plane 19, wherein the two
  • Platform elements 17a, b abut each other with corresponding pads 19a and 19b (Fig. 1).
  • recesses 18a and 18b are provided in the two platform elements 17a, b introduced, the composite platform 17 form an opening 18 through which the airfoil 1 1 can extend (Fig. 2).
  • the dividing plane 19 extends on both sides of the airfoil 1 1 in the axial direction from the front edge 13 to the front edge of the platform 17 and from the trailing edge 14 to the rear edge of the platform 17th
  • Fig. 3 shows an example of the attachment of the platform elements 17a, b am
  • hooks 23 are formed on the side of the platform elements 17a, b facing the blade leaf 11, with which the platform elements 17a, b engage in a corresponding groove 22 on the shank 15 of the blade. In this way, the blade root 16 remains free of any impairments by the platform 17.
  • a circumferential sealing groove 20 is provided in the platform elements 17a, b at the edge 18 facing edge, which receives a matched seal 21.
  • connection of the two platform elements 17a and 17b can be any connection of the two platform elements 17a and 17b.
  • FIG. 4 shows an example of a screw connection of the two elements.
  • Fig. 4 shows an example of a screw connection of the two elements.
  • Platform elements 17a, b are connected to each other by means of a connecting element 26, in particular in the form of a screw bolt.
  • Bolt can also be used a rivet.
  • a seal between the platform elements 17a, b are provided in the parting plane 19, a seal between the platform elements 17a, b are provided.
  • a sealing groove 24 is formed in the parting plane 19, which receives a matched seal 25.
  • Platform elements 17a, b but also made cohesively by means of welding or soldering.
  • a special type of locking is shown in Fig. 5, which is known under the keyword "bi-cast" and is described, for example, in the document US 5 797 725. In this case, the two platform elements overlap 17a, b with
  • a locking channel 29 is formed, which is poured after joining the platform elements 17 a, b with a metallic filling 30, which then a relative movement between the
  • Locking channel 29 laterally protruding lugs of the filling 30 are provided to slipping out of the filling 30 in the longitudinal direction of the
  • Fig. 6 shows, as an alternative to that of Fig. 3, another embodiment of the attachment of the platform elements 17a, b on the blade 1 1, which combines the functions of mechanical fastening and sealing together.
  • a solidifying filling 30 which can be poured into a formed between these turbine blade components locking channel 29.
  • the facing connection surfaces of the recess 18 of the platform elements 17a, b and the blade 1 1 and the shaft 15 of the turbine blade 10 are provided with opposing grooves for introducing a pourable filling 30, in particular a molten metal.
  • connecting element e.g., bolt, rivets

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

The invention relates to a turbine blade (10), comprising a blade (11) having a front edge (13) and a rear edge (14), which blade transitions by means of a shaft (15) into a blade root (16) designed for fastening the turbine blade (10), and comprising a platform (17), which is arranged at the lower end of the blade (11) in order to bound a flow channel, wherein the platform (17) is designed as a separate component and can be connected to the blade (11) in a form-fit manner. Flexible application is achieved in that the platform (17) is composed of several individual platform elements (17a, 17b), which enclose the blade (11) in the assembled state.

Description

BESCHREIBUNG TURBINENSCHAUFEL  DESCRIPTION TURBINE BUCKET
TECHNISCHES GEBIET TECHNICAL AREA
Die vorliegende Erfindung bezieht sich auf das Gebiet der Strömungsmaschinen. Sie betrifft eine Turbinenschaufel gemäss dem Oberbegriff des Anspruchs 1 , wie sie als Leit- oder Laufschaufel insbesondere in Gasturbinen eingesetzt wird. The present invention relates to the field of turbomachines. It relates to a turbine blade according to the preamble of claim 1, as it is used as a guide or blade, especially in gas turbines.
STAND DER TECHNIK STATE OF THE ART
Schaufeln für Gasturbinen, die im Kompressor- oder Turbinenteil als Leit- oder Laufschaufeln eingesetzt werden, werden üblicherweise als ein Teil durch Schmieden oder Feingiessen hergestellt. Dies gilt insbesondere auch für Blades for gas turbines, which are used in the compressor or turbine part as guide or moving blades, are usually produced as a part by forging or investment casting. This is especially true for
Schaufeln, die eine Plattform und/oder ein Deckbandsegment aufweisen. Blades having a platform and / or shroud segment.
Durch die immer weiter vorangetriebene Anhebung der Heissgastemperatur und die Verringerung des Kühlluftverbrauchs wird die Belastung von Leit- und Laufschaufeln in der Gasturbine erhöht. Es ist daher wünschenswert, an den Schaufeln auftretende Spannungen durch konstruktive Massnahmen zu Due to the ever-advancing increase in the hot-gas temperature and the reduction in the consumption of cooling air, the burden of control and Blades in the gas turbine increased. It is therefore desirable to stress on the blades by constructive measures
verringern. Bei gleicher Lebensdauer können Bauteile mit reduzierter Spannung höhere Temperaturen ertragen. Auf diese Weise kann der Forderung nach höherer Heissgastemperatur und geringerem Kühlluftverbrauch Rechnung getragen werden. reduce. For the same service life, components with reduced voltage can withstand higher temperatures. In this way, the demand for higher hot gas temperature and lower cooling air consumption can be taken into account.
Aus der Druckschrift EP 2 189 626 A1 ist eine Laufschaufelanordnung für eine Gasturbine bekannt, welche Laufschaufelanordnung an einem Schaufelträger befestigbar ist und jeweils ein Schaufelblattelement und ein Plattformelement umfasst, wobei die Plattformelemente einer Schaufelreihe ein durchgehendes inneres Deckband bilden. Eine reduzierte Spannung wird dort dadurch erreicht, dass Schaufelblattelement und Plattformelement als separate Elemente Document EP 2 189 626 A1 discloses a rotor blade arrangement for a gas turbine, which blade arrangement can be fastened to a blade carrier and in each case comprises an airfoil element and a platform element, wherein the platform elements of a blade row form a continuous inner cover strip. A reduced stress is achieved there by the blade element and platform element as separate elements
ausgebildet sind und jeweils für sich am Schaufelträger befestigbar sind. are formed and each fastened to the blade carrier.
Nachteilig ist bei dieser Lösung, dass sie für Retrofit-Aufgaben nicht geeignet ist, weil sich durch das Plattformelement die Art der Befestigung am Rotor ändert, so dass der Rotor selbst angepasst werden muss. The disadvantage of this solution is that it is not suitable for retrofit tasks because the type of attachment to the rotor changes due to the platform element, so that the rotor itself has to be adapted.
Aus der Druckschrift US 7,762,781 B1 ist eine Anordnung aus Turbinenschaufel und Plattform bekannt, bei der die Plattform als separates Element ausgebildet ist, das durch spezielle Stifte an der Schaufel befestigt wird. Diese Lösung hat den Nachteil, dass die einzelnen Elemente in der Herstellung sehr aufwändig sind. From the document US 7,762,781 B1 an arrangement of turbine blade and platform is known in which the platform is formed as a separate element which is fastened by special pins on the blade. This solution has the disadvantage that the individual elements in the production are very expensive.
DARSTELLUNG DER ERFINDUNG PRESENTATION OF THE INVENTION
Es ist eine Aufgabe der Erfindung, eine Turbinenschaufel anzugeben, welche die Nachteile bekannter Turbinenschaufeln vermeidet und sich dadurch auszeichnet dass eine separate Plattform eingesetzt wird, die ohne Änderung auf der It is an object of the invention to provide a turbine blade, which avoids the disadvantages of known turbine blades and is characterized in that a separate platform is used, without change on the
Befestigungsseite am Rotor angebracht werden kann. Diese und andere Aufgaben werden durch die Gesamtheit der Merkmale des Anspruchs 1 gelöst. Mounting side can be attached to the rotor. These and other objects are achieved by the entirety of the features of claim 1.
Die erfindungsgemässe Turbinenschaufel umfasst ein Schaufelblatt mit einer Vorderkante und einer Hinterkante, welches über einen Schaft in einen für die Befestigung der Turbinenschaufel ausgebildeten Schaufelfuss übergeht, sowie eine Plattform, welche am unteren Ende des Schaufelblattes zur Begrenzung eines Strömungskanals angeordnet ist, wobei die Plattform als separates The turbine blade according to the invention comprises an airfoil having a front edge and a trailing edge, which merges via a shank into a blade root designed for fastening the turbine blade, and a platform which is arranged at the lower end of the airfoil to delimit a flow channel, the platform being separate
Bauelement ausgebildet und mit dem Schaufelblatt formschlüssig verbindbar ist. Sie zeichnet sich dadurch aus, dass die Plattform aus mehreren einzelnen Component is formed and positively connected to the airfoil. It is characterized by the fact that the platform consists of several individual
Plattformelementen zusammengesetzt ist, welche im zusammengesetzten Platform elements composed in the composite
Zustand das Schaufelblatt umschliessen. Durch die zusammengesetzte Condition enclose the airfoil. By the composite
Ausbildung der Plattform ist es möglich, diese direkt an einer Schaufel zu befestigen, so dass Anpassungen im Bereich der Schaufelbefestigung vermieden werden können. Training the platform, it is possible to attach them directly to a blade, so that adjustments in the field of blade attachment can be avoided.
Gemäss einer Ausgestaltung der Erfindung ist die Plattform aus zwei According to one embodiment of the invention, the platform is composed of two
Plattformelementen zusammengesetzt. Eine andere Ausgestaltung der Erfindung ist dadurch gekennzeichnet, dass die beiden Plattformelemente im zusammengesetzten Zustand mit Anschlussflächen in einer Trennebene aneinander stossen, die sich von der Vorderkante bzw. der Hinterkante des Schaufelblattes in axialer Richtung zur zugehörigen Kante der Plattform erstreckt. Composite platform elements. Another embodiment of the invention is characterized in that the two platform elements abut in the assembled state with connecting surfaces in a parting plane which extends from the leading edge and the trailing edge of the airfoil in the axial direction to the associated edge of the platform.
Insbesondere sind die Plattformelemente jeweils mit von der Trennebene ausgehenden Ausnehmungen versehen, die im zusammengesetzten Zustand eine an das Profil des Schaufelblattes angepasste Öffnung für das durch die Plattform hindurchgehende Schaufelblatt bilden. In particular, the platform elements are each provided with outgoing from the parting plane recesses, which form in the assembled state adapted to the profile of the airfoil opening for the passing through the platform airfoil.
Vorzugsweise ist die Plattform zum Schaufelblatt hin abgedichtet. Insbesondere ist zur Abdichtung gegenüber dem Schaufelblatt entlang der Öffnung eine umlaufende Dichtungsnut in die Plattformelemente eingebracht, welche eine passende Dichtung aufnimmt. Gemäss einer anderen Ausgestaltung der Erfindung sind die beiden Preferably, the platform is sealed to the airfoil. In particular, a circumferential sealing groove is introduced into the platform elements to seal against the airfoil along the opening, which receives a suitable seal. According to another embodiment of the invention, the two are
Plattformelemente in der Trennebene gegeneinander abgedichtet. Platform elements in the parting plane sealed against each other.
Insbesondere ist zur Abdichtung in der Trennebene eine Dichtungsnut In particular, a sealing groove is for sealing in the parting plane
vorgesehen, welche eine angepasste Dichtung aufnimmt. provided, which receives a customized seal.
Eine weitere Ausgestaltung der Erfindung ist dadurch gekennzeichnet, dass die beiden Plattformelemente lösbar miteinander verbunden sind. A further embodiment of the invention is characterized in that the two platform elements are detachably connected to each other.
Insbesondere können die beiden Plattformelemente miteinander verschraubt oder vernietet sein. In particular, the two platform elements can be screwed or riveted together.
Vorzugsweise sind an den beiden Plattformelementen parallel zur Trennebene ausgerichtete und in der Trennebene aneinander stossende Flanschabschnitte ausgebildet, durch welche hindurch die beiden Plattformelemente miteinander verschraubt oder vernietet sind. Preferably, aligned on the two platform elements parallel to the parting plane and abutting in the parting plane flange portions are formed, through which the two platform elements are screwed or riveted together.
Gemäss einer weiteren Ausgestaltung der Erfindung sind die beiden According to a further embodiment of the invention, the two are
Plattformelemente durch Verriegelungsmittel miteinander verriegelt. Insbesondere überlappen die Plattformelemente im zusammengesetzten Zustand einander mit Überlappungsabschnitten, wobei im Überlappungsbereich zwischen den Überlappungsabschnitten ein Verriegelungskanal ausgebildet ist, und der Verriegelungskanal mit einer Füllung ausgegossen ist. Gemäss einer weiteren Ausgestaltung der Erfindung ist die Plattform an der Turbinenschaufel befestigt. Insbesondere ist die Plattform an der Turbinenschaufel eingehakt. Platform elements locked together by locking means. In particular, the platform elements in the assembled state overlap each other with overlapping sections, wherein in the overlapping area between the overlapping sections a locking channel is formed, and the locking channel is filled with a filling. According to a further embodiment of the invention, the platform is attached to the turbine blade. In particular, the platform is hooked to the turbine blade.
Vorzugsweise sind die Plattform bzw. die Plattformelemente mit Haken Preferably, the platform or the platform elements are with hooks
ausgestattet, mit welchen sie in eine Nut im Bereich des Schaftes der equipped with which they are in a groove in the region of the shank of
Turbinenschaufel eingehakt ist (sind). Turbine blade is hooked (are).
Alternativ können die Plattform bzw. die Plattformelemente stoffschlüssig mit der Turbinenschaufel verbunden sein. Gemäss einer besonders bevorzugten Variante sind die Plattform bzw. Alternatively, the platform or the platform elements may be materially connected to the turbine blade. According to a particularly preferred variant, the platform or
Plattformelemente mittels einer in einen Verriegelungskanal eingegossenen Füllung mit der Turbinenschaufel verbunden dergestalt, dass die Anschlussflächen eines Abschnitts der Turbinenschaufel und der Plattform bzw. Plattformelemente mit gegenüberliegenden Ausnehmungen ausgestattet sind, welche gemeinsam einen Hohlraum ausbilden, der geeignet ist, mit einem sich verfestigenden  Platform elements connected by means of a cast into a locking channel filling with the turbine blade such that the connection surfaces of a portion of the turbine blade and the platform or platform elements are provided with opposing recesses which together form a cavity, which is suitable with a solidifying
Füllmittel, bspw. einer Metallschmelze, ausgefüllt zu werden. Fillers, for example. A molten metal to be filled.
KURZE ERLÄUTERUNG DER FIGUREN BRIEF EXPLANATION OF THE FIGURES
Die Erfindung soll nachfolgend anhand von Ausführungsbeispielen im The invention will be described below with reference to embodiments in the
Zusammenhang mit der Zeichnung näher erläutert werden. Es zeigen Connection with the drawing will be explained in more detail. Show it
Fig. 1 in einer perspektivischen Ansicht eine aus zwei einzelnen Fig. 1 in a perspective view one of two individual
Elementen zusammensetzbare Plattform gemäss einem  Elements composable platform according to a
Ausführungsbeispiel der Erfindung;  Embodiment of the invention;
Fig. 2 in einer perspektivischen Ansicht eine Turbinenschaufel mit einer Fig. 2 is a perspective view of a turbine blade with a
Plattform gemäss Fig. 1 ;  Platform according to Fig. 1;
Fig. 3 in einer Schnittansicht die Abdichtung eines Plattformelements gegen das Schaufelblatt in der Anordnung gemäss Fig. 2; Fig. 4 in der Seitenansicht (a) und der Draufsicht von oben (b) ein Ausführungsbeispiel für eine verschraubte Plattform nach der Erfindung; 3 shows in a sectional view the sealing of a platform element against the blade in the arrangement according to FIG. 2; Fig. 4 in the side view (a) and the top view from above (b) an embodiment of a bolted platform according to the invention;
Fig. 5 in der Seitenansicht (a) und der Draufsicht von oben (b) ein Fig. 5 in the side view (a) and the top view from above (b) a
Ausführungsbeispiel für eine verriegelte Plattform nach der Erfindung und Fig. 6 eine alternative Ausführungsform der Befestigung und Abdichtung eines Plattformelements gegen das Schaufelblatt in der  Embodiment for a locked platform according to the invention and Fig. 6 shows an alternative embodiment of the attachment and sealing of a platform element against the airfoil in the
Anordnung gemäss Fig. 2.  Arrangement according to FIG. 2.
WEGE ZUR AUSFÜHRUNG DER ERFINDUNG WAYS FOR CARRYING OUT THE INVENTION
In Fig. 2 ist in einer perspektivischen Ansicht eine Turbinenschaufel mit einer Plattform gemäss einem Ausführungsbeispiel der Erfindung wiedergegeben. Die Turbinenschaufel 10, die beispielsweise eine Laufschaufel oder Leitschaufel einer Gasturbine sein kann, umfasst ein Schaufelblatt 1 1 , welches oben in einer Schaufelspitze 12 endet und eine Vorderkante 13 und eine Hinterkante 14 aufweist. Das Schaufelblatt 1 1 geht nach unten zu in einen Schaft 15 über, an den sich ein Schaufelfuss 16 anschliesst, der in an sich bekannter Weise FIG. 2 shows in a perspective view a turbine blade with a platform according to an exemplary embodiment of the invention. The turbine blade 10, which may be, for example, a blade or vane of a gas turbine, comprises an airfoil 1 1, which ends at the top in a blade tip 12 and has a front edge 13 and a trailing edge 14. The blade 1 1 goes down to a shaft 15, to which a blade root 16 connects, in a conventional manner
tannenbaumartig ausgebildet ist, um in eine entsprechende Aufnahme am Rotor eingesetzt zu werden. Tannenbaumartig is formed to be used in a corresponding receptacle on the rotor.
Das Schaufelblatt 1 1 wird an seinem unteren Ende von einer Plattform 17 umschlossen, die gemäss Fig. 1 aus zwei separaten Plattformelementen 17a und 17b in einer Trennebene 19 zusammengesetzt ist, wobei die beiden The blade 1 1 is enclosed at its lower end by a platform 17, which is composed according to FIG. 1 of two separate platform elements 17 a and 17 b in a parting plane 19, wherein the two
Plattformelemente 17a,b mit entsprechenden Anschlussflächen 19a und 19b aneinander stossen (Fig. 1 ). Von den Anschlussflächen 19a und 19b ausgehend sind in die beiden Plattformelementen 17a,b Ausnehmungen 18a und 18b eingebracht, die bei zusammengesetzter Plattform 17 eine Öffnung 18 bilden, durch die hindurch sich das Schaufelblatt 1 1 erstrecken kann (Fig. 2). Wie aus den Fig. 1 und 2 zu entnehmen ist, erstreckt sich die Trennebene 19 auf beiden Seiten des Schaufelblattes 1 1 in axialer Richtung von der Vorderkante 13 bis zum vorderen Rand der Plattform 17 bzw. von der Hinterkante 14 bis zum hinteren Rand der Plattform 17. Platform elements 17a, b abut each other with corresponding pads 19a and 19b (Fig. 1). Starting from the connection surfaces 19a and 19b, recesses 18a and 18b are provided in the two platform elements 17a, b introduced, the composite platform 17 form an opening 18 through which the airfoil 1 1 can extend (Fig. 2). As can be seen from Figs. 1 and 2, the dividing plane 19 extends on both sides of the airfoil 1 1 in the axial direction from the front edge 13 to the front edge of the platform 17 and from the trailing edge 14 to the rear edge of the platform 17th
Fig. 3 zeigt beispielhaft die Befestigung der Plattformelemente 17a,b am Fig. 3 shows an example of the attachment of the platform elements 17a, b am
Schaufelblatt 1 1 sowie die entsprechende Abdichtung zwischen den Airfoil 1 1 and the corresponding seal between the
Plattformelementen 17a,b und dem Schaufelblatt 1 1 . Zur Befestigung sind an der dem Schaufelblatt 1 1 zugewandten Seite der Plattformelemente 17a,b Haken 23 ausgebildet, mit denen die Plattformelemente 17a,b in eine entsprechende Nut 22 am Schaft 15 der Schaufel eingreifen. Auf diese Weise bleibt der Schaufelfuss 16 frei von irgendwelchen Beeinträchtigungen durch die Plattform 17. Zur Abdichtung ist in den Plattformelementen 17a,b am der Öffnung 18 zugewandten Rand eine umlaufende Dichtungsnut 20 vorgesehen, die eine angepasste Dichtung 21 aufnimmt. Platform elements 17 a, b and the blade 1 1. For fastening, hooks 23 are formed on the side of the platform elements 17a, b facing the blade leaf 11, with which the platform elements 17a, b engage in a corresponding groove 22 on the shank 15 of the blade. In this way, the blade root 16 remains free of any impairments by the platform 17. For sealing, a circumferential sealing groove 20 is provided in the platform elements 17a, b at the edge 18 facing edge, which receives a matched seal 21.
Die Verbindung der beiden Plattformelemente 17a und 17b kann auf The connection of the two platform elements 17a and 17b can
unterschiedliche Weise erfolgen. Fig. 4 zeigt beispielhaft eine Verschraubung der beiden Elemente. Dazu sind an den beiden Plattformelementen 17a,b parallel zur Trennebene 19 ausgerichtete und in der Trennebene 19 aneinander stossende Flanschabschnitte 27a,b ausgebildet, durch welche hindurch die beiden done in different ways. Fig. 4 shows an example of a screw connection of the two elements. For this purpose, aligned on the two platform elements 17a, b parallel to the parting plane 19 and in the parting plane 19 abutting flange portions 27a, b, through which the two
Plattformelemente 17a,b mittels eines Verbindungselements 26, insbesondere in Form eines Schraubbolzens, miteinander verbunden sind. Anstelle des Platform elements 17a, b are connected to each other by means of a connecting element 26, in particular in the form of a screw bolt. Instead of
Schraubbolzens kann auch ein Niet eingesetzt werden. Wie in Fig. 4 (a) dargestellt, kann in der Trennebene 19 auch eine Abdichtung zwischen den Plattformelementen 17a,b vorgesehen werden. Hierzu ist in der Trennebene 19 eine Dichtungsnut 24 ausgebildet, die eine angepasste Dichtung 25 aufnimmt. Anstelle der lösbaren Verschraubung kann die Verbindung zwischen den Bolt can also be used a rivet. As shown in Fig. 4 (a), in the parting plane 19, a seal between the platform elements 17a, b are provided. For this purpose, a sealing groove 24 is formed in the parting plane 19, which receives a matched seal 25. Instead of the detachable screw connection, the connection between the
Plattformelementen 17a,b aber auch stoffschlüssig mittels Schweissen oder Löten erfolgen. Als weitere Möglichkeit der Verbindung zwischen den Plattformelementen 17a,b ist in Fig. 5 eine spezielle Art der Verriegelung gezeigt, die unter dem Stichwort „bi-cast" bekannt und beispielsweise in der Druckschrift US 5,797,725 beschrieben ist. In diesem Falle überlappen die beiden Plattformelemente 17a,b mit Platform elements 17a, b but also made cohesively by means of welding or soldering. As a further possibility of the connection between the platform elements 17a, b, a special type of locking is shown in Fig. 5, which is known under the keyword "bi-cast" and is described, for example, in the document US 5 797 725. In this case, the two platform elements overlap 17a, b with
entsprechenden Überlappungsabschnitten 28a und 28b, wobei im corresponding overlapping portions 28a and 28b, wherein in
Überlappungsbereich ein Verriegelungskanal 29 ausgebildet wird, der nach dem Zusammenfügen der Plattformelemente 17a,b mit einer metallischen Füllung 30 ausgegossen wird, die dann eine Relativbewegung zwischen den Overlapping a locking channel 29 is formed, which is poured after joining the platform elements 17 a, b with a metallic filling 30, which then a relative movement between the
Überlappungsabschnitten 28a,b sicher verhindert. Wie der in Fig. 5(a) gezeigte Schnitt entlang der Ebene A-A aus Fig. 5(b) deutlich macht, können im Overlap portions 28a, b safely prevented. As the section shown in FIG. 5 (a) makes clear along the plane A-A of FIG. 5 (b), in FIG
Verriegelungskanal 29 seitlich herausstehende Nasen der Füllung 30 vorgesehen werden, um ein Herausrutschen der Füllung 30 in Längsrichtung des Locking channel 29 laterally protruding lugs of the filling 30 are provided to slipping out of the filling 30 in the longitudinal direction of the
Verbindungskanals 29 zu verhindern. Prevent connecting channel 29.
Fig. 6 zeigt, alternativ zu derjenigen der Fig. 3, eine weitere Ausführungsart der Befestigung der Plattformelemente 17a,b am Schaufelblatt 1 1 , die die Funktionen der mechanischen Befestigung und der Abdichtung miteinander vereint. Fig. 6 shows, as an alternative to that of Fig. 3, another embodiment of the attachment of the platform elements 17a, b on the blade 1 1, which combines the functions of mechanical fastening and sealing together.
An die Stelle einer kraft- und formschlüssigen Verbindung mittels der In place of a non-positive and positive connection by means of
Befestigungselemente Nut 22 und Haken 23 sowie der Abdichtelemente Nut 20 und Dichtung 21 , wie in Fig.3 beispielhaft dargestellt, tritt eine stoffschlüssige Verbindung dieser Komponenten mittels einer sich verfestigenden Füllung 30, welche in einen zwischen diesen zu verbindenden Turbinenschaufelkomponenten ausgebildeten Verriegelungskanal 29 eingiessbar ist. Dies zu erreichen, sind die zugewandten Anschlussflächen der Ausnehmung 18 der Plattformelemente 17a,b sowie des Schaufelblatts 1 1 bzw. des Schafts 15 der Turbinenschaufel 10 mit gegenüberliegenden Nuten zur Einbringung einer giessfähigen Füllung 30, insbesondere einer Metallschmelze, versehen. Nach Verfestigung des Fastening elements groove 22 and hooks 23 and the sealing elements groove 20 and seal 21, as exemplified in Figure 3, enters a material connection of these components by means of a solidifying filling 30, which can be poured into a formed between these turbine blade components locking channel 29. To achieve this, the facing connection surfaces of the recess 18 of the platform elements 17a, b and the blade 1 1 and the shaft 15 of the turbine blade 10 are provided with opposing grooves for introducing a pourable filling 30, in particular a molten metal. After consolidation of the
eingebrachten Füllmaterials, beispielsweise dessen Erstarrung oder Aushärtung, sind die Schaufelkomponenten fest miteinander verbunden. Dabei versteht es sich von selbst, dass ein Füllmaterial auszuwählen ist, welches unter den Bedingungen des bestimmungsgemässen Gebrauchs der Turbinenschaufel 10 in festem introduced filling material, for example, its solidification or curing, the blade components are firmly connected. It goes without saying that a filling material is to be selected, which under the conditions of the intended use of the turbine blade 10 in solid
Aggregatzustand verbleibt und keine thermische Schädigung erfährt. Wird der Verriegelungskanal 29 durchgehend so ausgeführt, dass er einen geschlossenen Ring um das Blatt 1 1 bzw. den Schaft 15 der Turbinenschaufel 10 herum bildet, dann erfüllt diese Verbindung die Doppelfunktion der Befestigung und Abdichtung, da eine derartige Verbindung naturgemäss hinreichend fluiddicht ist. Das State of aggregation remains and no thermal damage is experienced. If the locking channel 29 is continuously designed so that it forms a closed ring around the blade 1 1 or the shaft 15 of the turbine blade 10 around, then this compound fulfills the dual function of attachment and sealing, since such a compound is of course sufficiently fluid-tight. The
Erfordernis einer zusätzlichen Dichtung zwischen Schaufelblatt 1 1 oder -schaft 15 und Plattform 17 entfällt somit. Requirement of an additional seal between the blade 1 1 or shaft 15 and 17 platform thus omitted.
Mit der Erfindung wird eine mechanische Entkopplung zwischen Plattform und Schaufel erreicht, die unerwünschte Spannungen vermeidet und gleichzeitig flexibel in der Anwendung ist und ohne Änderung der Schaufelbefestigung auch nachgerüstet werden kann. With the invention, a mechanical decoupling between platform and blade is achieved, which avoids undesirable stresses and at the same time is flexible in the application and can be retrofitted without changing the blade attachment.
BEZUGSZEICHENLISTE LIST OF REFERENCE NUMBERS
10 Turbinenschaufel 10 turbine blade
1 1 Schaufelblatt  1 1 blade
12 Schaufelspitze  12 blade tip
13 Vorderkante  13 leading edge
14 Hinterkante  14 trailing edge
15 Schaft  15 shaft
16 Schaufelfuss  16 blade foot
17 Plattform  17 platform
17a,b Plattformelement  17a, b platform element
18 Öffnung  18 opening
18a,b Ausnehmung  18a, b recess
19 Trennebene  19 parting plane
19a,b Anschlussfläche  19a, b pad
20,24 Dichtungsnut  20.24 sealing groove
21 ,25 Dichtung  21, 25 seal
22 Nut  22 groove
23 Haken  23 hooks
26 Verbindungselement (z.B. Schraubbolzen, Niete) 26 connecting element (e.g., bolt, rivets)
27a,b Flanschabschnitt 27a, b flange portion
28a,b Überlappungsabschnitt  28a, b Overlap section
29 Verriegelungskanal  29 locking channel
30 Füllung  30 filling

Claims

PATENTANSPRÜCHE
1 . Turbinenschaufel (10), umfassend ein Schaufelblatt (1 1 ) mit einer Vorderkante (13) und einer Hinterkante (14), welches über einen Schaft (15) in einen für die Befestigung der Turbinenschaufel (10) ausgebildeten Schaufelfuss (16) übergeht, sowie eine Plattform (17), welche am unteren Ende des 1 . A turbine blade (10) comprising an airfoil (11) having a leading edge (13) and a trailing edge (14) which merges via a shank (15) into a blade root (16) adapted to secure the turbine blade (10), and a platform (17), which at the lower end of
Schaufelblattes (1 1 ) zur Begrenzung eines Strömungskanals angeordnet ist, wobei die Plattform (17) als separates Bauelement ausgebildet und mit dem Schaufelblatt (1 1 ) formschlüssig verbindbar ist, dadurch gekennzeichnet, dass die Plattform (17) aus mehreren einzelnen Plattformelementen (17a,b) Blade (1 1) is arranged for limiting a flow channel, wherein the platform (17) formed as a separate component and with the blade (1 1) is positively connected, characterized in that the platform (17) consists of a plurality of individual platform elements (17a, b)
zusammengesetzt ist, welche im zusammengesetzten Zustand das Schaufelblatt (1 1 ) umschliessen. is composed, which in the assembled state, the airfoil (1 1) enclose.
2. Turbinenschaufel nach Anspruch 1 , dadurch gekennzeichnet, dass die2. turbine blade according to claim 1, characterized in that the
Plattform (17) aus zwei Plattformelementen (17a,b) zusammengesetzt ist. Platform (17) of two platform elements (17a, b) is composed.
3. Turbinenschaufel nach Anspruch 2, dadurch gekennzeichnet, dass die beiden Plattformelemente (17a,b) im zusammengesetzten Zustand mit 3. turbine blade according to claim 2, characterized in that the two platform elements (17 a, b) in the assembled state with
Anschlussflächen (19a,b) in einer Trennebene (19) aneinander stossen, die sich von der Vorderkante (13) bzw. der Hinterkante (14) des Schaufelblattes (1 1 ) in axialer Richtung zur zugehörigen Kante der Plattform (17) erstreckt. Connection surfaces (19a, b) in a parting plane (19) abut each other, extending from the front edge (13) and the trailing edge (14) of the airfoil (1 1) in the axial direction to the associated edge of the platform (17).
4. Turbinenschaufel nach Anspruch 3, dadurch gekennzeichnet, dass die Plattformelemente (17a,b) jeweils mit von der Trennebene (19) ausgehenden4. turbine blade according to claim 3, characterized in that the platform elements (17 a, b) each with from the parting plane (19) outgoing
Ausnehmungen (18a,b) versehen sind, die im zusammengesetzten Zustand eine an das Profil des Schaufelblattes (1 1 ) angepasste Öffnung (18) für das durch die Plattform (17) hindurchgehende Schaufelblatt (1 1 ) bilden. Recesses (18a, b) are provided, which in the assembled state to the profile of the airfoil (1 1) adapted opening (18) for the through the platform (17) passing through the airfoil (1 1).
5. Turbinenschaufel nach Anspruch 4, dadurch gekennzeichnet, dass die5. turbine blade according to claim 4, characterized in that the
Plattform (17) zum Schaufelblatt (1 1 ) hin abgedichtet ist. Platform (17) to the blade (1 1) is sealed towards.
6. Turbinenschaufel nach Anspruch 5, dadurch gekennzeichnet, dass zur Abdichtung gegenüber dem Schaufelblatt (1 1 ) entlang der Öffnung (18) eine umlaufende Dichtungsnut (20) in die Plattformelemente (17a,b) eingebracht ist, welche eine passende Dichtung (21 ) aufnimmt. 6. turbine blade according to claim 5, characterized in that for sealing against the airfoil (1 1) along the opening (18) has a circumferential sealing groove (20) in the platform elements (17 a, b) is introduced, which a suitable seal (21) receives.
7. Turbinenschaufel nach einem der Ansprüche 3-6, dadurch 7. Turbine blade according to one of claims 3-6, characterized
gekennzeichnet, dass die beiden Plattformelemente (17a,b) in der Trennebene (19) gegeneinander abgedichtet sind. characterized in that the two platform elements (17a, b) are sealed against each other in the parting plane (19).
8. Turbinenschaufel nach Anspruch 7, dadurch gekennzeichnet, dass zur8. turbine blade according to claim 7, characterized in that the
Abdichtung in der Trennebene (19) eine Dichtungsnut (24) vorgesehen ist, welche eine angepasste Dichtung (25) aufnimmt. Sealing in the parting plane (19) a sealing groove (24) is provided, which receives a matched seal (25).
9. Turbinenschaufel nach einem der Ansprüche 3-8, dadurch 9. turbine blade according to one of claims 3-8, characterized
gekennzeichnet, dass die beiden Plattformelemente (17a,b) lösbar miteinander verbunden sind. characterized in that the two platform elements (17a, b) are releasably connected to each other.
10. Turbinenschaufel nach Anspruch 9, dadurch gekennzeichnet, dass die beiden Plattformelemente (17a,b) miteinander verschraubt (26) oder vernietet sind. 10. turbine blade according to claim 9, characterized in that the two platform elements (17 a, b) screwed together (26) or riveted.
1 1 . Turbinenschaufel nach Anspruch 10, dadurch gekennzeichnet, dass an den beiden Plattformelementen (17a,b) parallel zur Trennebene (19) ausgerichtete und in der Trennebene (19) aneinander stossende Flanschabschnitte (27a,b) ausgebildet sind, durch welche hindurch die beiden Plattformelemente (17a,b) miteinander verschraubt (26) oder vernietet sind. 1 1. Turbine blade according to claim 10, characterized in that on the two platform elements (17a, b) parallel to the parting plane (19) aligned and in the parting plane (19) abutting flange portions (27a, b) are formed, through which the two platform elements (17 17a, b) are screwed together (26) or riveted.
12. Turbinenschaufel nach einem der Ansprüche 3-8, dadurch 12. Turbine blade according to one of claims 3-8, characterized
gekennzeichnet, dass die beiden Plattformelemente (17a,b) durch in that the two platform elements (17a, b) pass through
Verriegelungsmittel (29, 30) miteinander verriegelt sind. Locking means (29, 30) are locked together.
13. Turbinenschaufel nach Anspruch 12, dadurch gekennzeichnet, dass die Plattformelemente (17a,b) im zusammengesetzten Zustand einander mit 13. turbine blade according to claim 12, characterized in that the platform elements (17 a, b) in the assembled state with each other
Überlappungsabschnitten (28a,b) überlappen, dass im Überlappungsbereich zwischen den Überlappungsabschnitten (28a,b) ein Verriegelungskanal (29) ausgebildet ist, und dass der Verriegelungskanal (29) mit einer Füllung (30) ausgegossen ist. Overlapping portions (28a, b) overlap that in the overlapping area between the overlapping portions (28a, b), a locking channel (29) is formed, and that the locking channel (29) is filled with a filling (30).
14. Turbinenschaufel nach einem der Ansprüche 1 -13, dadurch 14. turbine blade according to any one of claims 1 -13, characterized
gekennzeichnet, dass die Plattform (17) an der Turbinenschaufel (10) befestigt ist. characterized in that the platform (17) is fixed to the turbine blade (10).
15. Turbinenschaufel nach Anspruch 14, dadurch gekennzeichnet, dass die Plattform (17) an der Turbinenschaufel (10) eingehakt ist. 15. turbine blade according to claim 14, characterized in that the platform (17) is hooked to the turbine blade (10).
16. Turbinenschaufel nach Anspruch 15, dadurch gekennzeichnet, dass die Plattform (17) bzw. die Plattformelemente (17a,b) mit Haken (23) ausgestattet ist16. A turbine blade according to claim 15, characterized in that the platform (17) or the platform elements (17 a, b) is equipped with hooks (23)
(sind), mit welchem sie in eine Nut (22) im Bereich des Schaftes (15) der (are), with which they in a groove (22) in the region of the shank (15) of the
Turbinenschaufel (10) eingehakt ist (sind). Turbine blade (10) is hooked (are).
17. Turbinenschaufel nach Anspruch 14, dadurch gekennzeichnet, dass die Plattform (17) oder die Plattformelemente (17a,b) stoffschlüssig mit der 17. turbine blade according to claim 14, characterized in that the platform (17) or the platform elements (17 a, b) cohesively with the
Turbinenschaufel (10) verbunden sind.  Turbine blade (10) are connected.
18. Turbinenschaufel nach Anspruch 17, dadurch gekennzeichnet, dass Schaufelblatt (1 1 ) oder Schaufelschaft (15) einerseits und die Plattformelemente (17a,b) andererseits jeweils mit einer nutförmigen Ausnehmung versehen sind, und diese nutförmigen Ausnehmungen derart gegenüberliegend angeordnet sind, dass sie einen Verriegelungskanal (29) ausbilden, und dieser Verriegelungskanal (29) mit einer Füllung (30) ausgegossen ist. 18. turbine blade according to claim 17, characterized in that the blade (1 1) or blade shank (15) on the one hand and the platform elements (17a, b) on the other hand each provided with a groove-shaped recess, and these groove-shaped recesses are arranged opposite one another such that they forming a locking channel (29), and this locking channel (29) is filled with a filling (30).
19. Turbinenschaufel nach Anspruch 18, dadurch gekennzeichnet, dass der19. turbine blade according to claim 18, characterized in that the
Verriegelungskanal (29) durchgehend über den Umfang des Schaufelblatts (1 1 ) bzw. -schafts (15) ausgebildet ist. Locking channel (29) is formed continuously over the circumference of the airfoil (1 1) or -schaft (15).
20. Turbinenschaufel nach Anspruch 18 oder 19, dadurch gekennzeichnet, dass die Füllung (30) ein giessbares Metall ist, welches unter den Bedingungen des bestimmungsgemässen Gebrauchs der Turbinenschaufel den festen 20. Turbine blade according to claim 18 or 19, characterized in that the filling (30) is a castable metal, which under the conditions of the intended use of the turbine blade fixed
Aggregatzustand einnimmt. State of aggregation.
EP13712793.2A 2012-03-30 2013-03-27 Turbine blade Active EP2831376B1 (en)

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EP12162372.2A EP2644829A1 (en) 2012-03-30 2012-03-30 Turbine blade
PCT/EP2013/056610 WO2013144254A1 (en) 2012-03-30 2013-03-27 Turbine blade
EP13712793.2A EP2831376B1 (en) 2012-03-30 2013-03-27 Turbine blade

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KR20150002710A (en) 2015-01-07
CN104169528A (en) 2014-11-26
US20150017007A1 (en) 2015-01-15
CN104169528B (en) 2016-07-20
US9920636B2 (en) 2018-03-20
JP2015515571A (en) 2015-05-28
WO2013144254A1 (en) 2013-10-03
EP2831376B1 (en) 2018-10-24
JP6153599B2 (en) 2017-06-28
EP2644829A1 (en) 2013-10-02

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