EP2792848A1 - Method for restoring the initial tension of the shroud of the blades of a gas turbine - Google Patents
Method for restoring the initial tension of the shroud of the blades of a gas turbine Download PDFInfo
- Publication number
- EP2792848A1 EP2792848A1 EP13164028.6A EP13164028A EP2792848A1 EP 2792848 A1 EP2792848 A1 EP 2792848A1 EP 13164028 A EP13164028 A EP 13164028A EP 2792848 A1 EP2792848 A1 EP 2792848A1
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- EP
- European Patent Office
- Prior art keywords
- blades
- cover plate
- bracing element
- cover plates
- gap
- 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.)
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Classifications
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- 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
- F01D5/005—Repairing methods or devices
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
- F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
- F01D9/041—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector using blades
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- 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
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/31—Application in turbines in steam turbines
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- 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
- F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
- F05D2230/232—Manufacture essentially without removing material by permanently joining parts together by welding
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- 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
- F05D2230/80—Repairing, retrofitting or upgrading methods
Definitions
- the invention relates to a method for restoring a cover plate prestress of a turbine blade, wherein the blades are formed with cover plates, wherein between two cover plates of adjacent blades, a gap is formed due to damage.
- turbomachines such as e.g. Steam turbines
- a flow medium between so-called guide and moving blades is moved.
- the rotor blades are arranged on the surface of a rotor, wherein the rotor is rotatably mounted about a rotation axis.
- the individual blades are formed into a so-called blade row, which means that the individual blades are arranged in the circumferential direction on the rotor surface.
- the rotor is arranged in a housing with the rotor blade rows, which are arranged one after the other in a flow direction, wherein the guide vanes are arranged on an inner surface of the housing.
- the vanes are arranged such that they are also arranged in a circumferential direction one behind the other and thus form a row of vanes.
- a flow channel through which the flow medium flows, is created between the guide blade and blade rows.
- steam flows as a flow medium along the flow channel.
- the movement of the flow medium in the flow channel causes the rotor to rotate. This rotation can, for example, be exploited to drive electric generators.
- the blades have an aerodynamic profile, the blades being end-to-end from the axis of rotation seen so-called cover plates. These cover plates are arranged at the blade ends and thus form a boundary for the flow channel.
- cover plates are arranged at the blade ends and thus form a boundary for the flow channel.
- the invention seeks to remedy this situation.
- the invention proposes to arrange an additional component, namely a bracing element between the cover plates, thereby countering the costly replacement of a blade.
- This bracing member is inserted from an inner side of the blade row into the gap and welded from the inside or the outside.
- the advantage of this method according to the invention is that the blade row can be tightened again. Such a tension of the blade row until the next inspection is therefore guaranteed cost. A reliable use of the turbine thereby avoids possible damage and further damage to the blade row can be avoided.
- the blade row forms a blade composite. The blade assembly is thereby secured against the occurrence of further damage.
- the bracing element is formed with a wedge piece, wherein the wedge piece is wedge-shaped and is arranged in the gap.
- the bracing element thus has a wedge piece, which projects into the gap and is wedge-shaped.
- the bracing element is T-shaped and arranged the wedge piece perpendicular to the crossbar.
- This T-shaped form facilitates insertion of the bracing element into the damaged gap. Furthermore, due to forces such as e.g. Centrifugal forces, a movement of the bracing element between the shrouds effectively avoided.
- the tension element is arranged such that the crossbar is below the shrouds.
- the crossbeam is arranged in the flow channel. Therefore, the crossbeam should not have an unnecessarily large shape.
- a force between the shrouds is exerted by the insertion of the bracing element, which leads to a pushing apart of the shrouds.
- FIG. 1 is a plan view of a first cover plate 1 and a second cover plate 2 shown.
- the first cover plate 1 and the second cover plate 2 are arranged at the end on blade profiles 3.
- the blade profile 3 is in the FIG. 1 represented by dashed lines.
- the first cover plate 1 and the second cover plate 2 form with the blade profile 3 and a blade root 4 each have a blade.
- the blade root is arranged in a housing.
- the blade root 4 is arranged on a rotor.
- the invention is applicable to both guide and for blades.
- the first cover plate 1 and the second cover plate 2 are arranged in a circumferential direction 5.
- the blades form in the circumferential direction 5 a successively arranged arrangement of a row of blades.
- the gap 6 is formed due to a damage between the first cover plate 1 and the second cover plate 2 of two adjacent blades.
- the method for repairing the blade row now provides that in a first step, a bracing element 7 is inserted into the gap 6. And in a second step, the bracing element with the cover plates 1, 2 is welded.
- This welding can be done below, outside or at the front side of the first cover plate 1 or second cover plate 2 as well as outside the first cover plate 1 and the second cover plate 2.
- the cover plates 1, 2 form in the association circumferentially arranged a shroud.
- the bracing element 7 is formed with a wedge piece 8, which is wedge-shaped and is arranged in the gap 3.
- the wedge piece 8 is in this case wedge-shaped, that a movement of the wedge piece 8 in the direction of the first cover plate 1 and the second cover plate 2 exerts a force which leads to a pressing apart of the first cover plate 1 and the second cover plate 2.
- the bracing element 7 is T-shaped, wherein the wedge piece 8 is arranged perpendicular to the crossbar 9.
- the crossbar 9 is thus arranged on the inside of the first cover plate 1 and the second cover plate 2.
- the insertion of the bracing element 7 leads to a force between the first cover plate 1 and second cover plate 2, which leads to the pressing apart of the first cover plate 1 and the second cover plate 2.
- FIG. 2 shows a sectional view of a portion of the blade row.
- the bracing element 7 is in this case in the installed state, that is, according to the repair method according to the invention, shown.
- the bracing element 7 is welded to the first cover plate 1 or to the second cover plate 2. This welding can take place on the shroud surface 10 or on the shroud inner surface 11.
- FIG. 3 is a perspective view of the blade row shown.
- only one bracing element 7 has been illustrated in the figures.
- FIG. 4 shows an alternative embodiment of the bracing element 7.
- the bracing element 7 is executed twisted by about 180 °. That means, that the transverse bar 9 is arranged above the cover plate 2.
- the wedge piece 8 is between two cover plates 2. But does not have to be wedge-shaped. Rather, the wedge piece 8 may be formed substantially parallel to the contact surfaces of the cover plate 2. So that the bracing element 7 does not detach from the shroud during operation, it is welded to the cover plates 2.
- the invention can be used in steam turbines.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Die Erfindung betrifft ein Verfahren zum Reparieren einer Schaufelreihe, wobei die Schaufeln Deckplatten (1, 2) aufweisen und ein störender Spalt (6) zwischen den Deckplatten (1, 2) entstanden ist, wobei das Verfahren sich dadurch auszeichnet, dass in einem ersten Verfahrensschritt ein Verspannungselement (7) in dem Spalt (6) zwischen den Deckplatten (1, 2) angeordnet wird und in einem zweiten Verfahrensschritt miteinander verschweißt wird. The invention relates to a method for repairing a row of blades, wherein the blades have cover plates (1, 2) and an interfering gap (6) has formed between the cover plates (1, 2), the method being characterized in that in a first method step a bracing element (7) is arranged in the gap (6) between the cover plates (1, 2) and is welded together in a second method step.
Description
Die Erfindung betrifft ein Verfahren zum Wiederherstellen einer Deckplattenvorspannung einer Turbinenbeschaufelung, wobei die Schaufeln mit Deckplatten ausgebildet sind, wobei zwischen zwei Deckplatten von benachbarten Schaufeln ein Spalt aufgrund eines Schadens ausgebildet ist.The invention relates to a method for restoring a cover plate prestress of a turbine blade, wherein the blades are formed with cover plates, wherein between two cover plates of adjacent blades, a gap is formed due to damage.
In Strömungsmaschinen, wie z.B. Dampfturbinen, wird ein Strömungsmedium zwischen sogenannten Leit- und Laufschaufeln bewegt. Die Laufschaufeln sind auf der Oberfläche eines Rotors angeordnet, wobei der Rotor um eine Rotationsachse drehbar gelagert ist. Die einzelnen Laufschaufeln werden zu einer sogenannten Laufschaufelreihe ausgebildet, das bedeutet, dass die einzelnen Laufschaufeln in Umfangsrichtung auf der Rotoroberfläche angeordnet sind.In turbomachines, such as e.g. Steam turbines, a flow medium between so-called guide and moving blades is moved. The rotor blades are arranged on the surface of a rotor, wherein the rotor is rotatably mounted about a rotation axis. The individual blades are formed into a so-called blade row, which means that the individual blades are arranged in the circumferential direction on the rotor surface.
Der Rotor wird mit den Laufschaufelreihen, die in einer Strömungsrichtung nacheinander angeordnet sind, in einem Gehäuse angeordnet, wobei auf einer Innenfläche des Gehäuses die Leitschaufeln angeordnet sind. Die Leitschaufeln werden dabei derart angeordnet, dass sie ebenfalls in einer Umfangsrichtung hintereinander angeordnet sind und somit eine Leitschaufelreihe bilden. Dadurch entsteht zwischen den Leitschaufel - und Laufschaufelreihen ein Strömungskanal, durch den das Strömungsmedium strömt. Bei einer Dampfturbine als Beispiel für eine Strömungsmaschine strömt Dampf als Strömungsmedium entlang des Strömungskanals.The rotor is arranged in a housing with the rotor blade rows, which are arranged one after the other in a flow direction, wherein the guide vanes are arranged on an inner surface of the housing. The vanes are arranged such that they are also arranged in a circumferential direction one behind the other and thus form a row of vanes. As a result, a flow channel, through which the flow medium flows, is created between the guide blade and blade rows. In a steam turbine as an example of a turbomachine steam flows as a flow medium along the flow channel.
Durch die Bewegung des Strömungsmediums im Strömungskanal wird der Rotor in Drehung versetzt. Diese Drehung kann bspw. ausgenutzt werden, um elektrische Generatoren anzutreiben.The movement of the flow medium in the flow channel causes the rotor to rotate. This rotation can, for example, be exploited to drive electric generators.
Die Laufschaufeln weisen ein aerodynamisches Profil auf, wobei die Laufschaufeln endseitig von der Rotationsachse her gesehen sogenannte Deckplatten aufweisen. Diese Deckplatten sind an den Laufschaufelenden angeordnet und bilden somit eine Begrenzung für den Strömungskanal. Während des Betriebs einer so ausgebildeten Strömungsmaschine kann es zu Berührungen zwischen den einzelnen Deckbändern der Laufschaufelreihen und den gegenüberliegenden Dichtbändern im Gehäuse, oder im Falle von Leitschaufeln dem gegenüberliegenden Rotor kommen, die zu einer hohen Materialbelastung führen. Dies kann zu Schäden auf den Deckbändern führen, die unerwünscht sind. Ein Schaden wäre bspw., dass ein Spalt zwischen den einzelnen Deckplatten entsteht, was im Betrieb zu störenden Schwingungen der Schaufeln führen könnte.The blades have an aerodynamic profile, the blades being end-to-end from the axis of rotation seen so-called cover plates. These cover plates are arranged at the blade ends and thus form a boundary for the flow channel. During operation of a turbomachine formed in this way, contact between the individual shrouds of the rotor blade rows and the opposing sealing bands in the housing, or in the case of guide vanes, the opposite rotor, which lead to a high material load. This can cause damage to the shrouds that are undesirable. A damage would be, for example., That a gap between the individual cover plates arises, which could lead to disturbing vibrations of the blades during operation.
Solche vorgenannten Spalte können in Folge von Plastifizierungen an den Leit- bzw. Laufschaufeln entstehen.Such aforementioned gaps can arise as a result of plasticizations on the guide or rotor blades.
Um weiteren Schäden vorzubeugen müssten beschädigte Lauf- bzw. Leitschaufeln ausgetauscht werden, was ein großer Aufwand wäre und nur während geplanter Revisionen durchgeführt wird. Solch ein Austausch kann naturgemäß auch nur dann durchgeführt werden, wenn ein entsprechender Vorrat an Ersatzschaufeln zur Verfügung steht.In order to prevent further damage, damaged running or guide vanes would have to be replaced, which would be a great expense and will only be carried out during planned revisions. Such an exchange can of course only be carried out if a corresponding supply of replacement blades is available.
Eine weitere Möglichkeit solchen Schäden zu begegnen ist, den Befund zu dokumentieren und die abschließende Reparatur auf eine noch folgende Revision zu verschieben. Allerdings erhöht sich hierdurch das Betriebsrisiko aufgrund eines möglichen Schaufelabrisses. Ein weiteres Szenario wäre, dass der Gesamtschaufelverbund durch einen schadhaften Spalt insgesamt gefährdet wird.Another way to deal with such damage is to document the findings and postpone the final repair to a later revision. However, this increases the operating risk due to a possible blade break. A further scenario would be that the entire composite scoop is endangered by a faulty gap altogether.
Die Erfindung möchte hier Abhilfe schaffen.The invention seeks to remedy this situation.
Es ist daher Aufgabe der Erfindung ein Verfahren anzugeben, das bei Schaufeln mit Deckbändern eingesetzt wird, wobei zwischen zwei Deckplatten ein Spalt aufgrund eines Schadens auftritt und eine weitere Erhöhung des Schadens vermieden wird. Gelöst wird diese Aufgabe durch ein Verfahren zum Wiederherstellen einer Deckplattenvorspannung einer Turbinenbeschaufelung, wobei die Schaufeln mit Deckplatten ausgebildet sind, wobei zwischen zwei Deckplatten von benachbarten Schaufeln ein Spalt aufgrund eines Schadens ausgebildet ist, mit den Schritten:
- Einfügen eines Verspannungselementes in den Spalt,
- Verschweißen des Verspannungselementes mit dem Deckband.
- Inserting a bracing element into the gap,
- Welding the bracing element with the shroud.
Somit wird erfindungsgemäß vorgeschlagen, ein zusätzliches Bauteil, nämlich ein Verspannungselement zwischen den Deckplatten anzuordnen, um dadurch dem kostspieligen Austausch einer Schaufel zu begegnen. Dieses Verspannungselement wird von einer inneren Seite der Schaufelreihe in den Spalt eingeführt und von innen oder von außen verschweißt.Thus, the invention proposes to arrange an additional component, namely a bracing element between the cover plates, thereby countering the costly replacement of a blade. This bracing member is inserted from an inner side of the blade row into the gap and welded from the inside or the outside.
Der Vorteil dieses erfindungsgemäßen Verfahrens liegt darin, dass die Schaufelreihe wieder verspannt werden kann. Solch eine Verspannung der Schaufelreihe bis zur nächsten Inspektion ist daher kostengünstig gewährleistet. Eine betriebssichere Nutzung der Turbine vermeidet dadurch mögliche Schäden und weitere Beschädigungen der Schaufelreihe können dadurch vermieden werden. Die Schaufelreihe bildet einen Schaufelverbund. Der Schaufelverbund ist dadurch vor einem Auftreten von weiteren Schäden gesichert.The advantage of this method according to the invention is that the blade row can be tightened again. Such a tension of the blade row until the next inspection is therefore guaranteed cost. A reliable use of the turbine thereby avoids possible damage and further damage to the blade row can be avoided. The blade row forms a blade composite. The blade assembly is thereby secured against the occurrence of further damage.
Vorteilhafte Weiterbildungen sind in den Unteransprüchen angegeben.Advantageous developments are specified in the subclaims.
So wird in einer ersten vorteilhaften Weiterbildung das Verspannungselement mit einem Keilstück ausgebildet, wobei das Keilstück keilförmig ist und in dem Spalt angeordnet wird. Das Verspannungselement weist somit ein Keilstück auf, das in den Spalt hineinragt und keilförmig ausgebildet ist. Durch diese besondere Form des Keilstücks kann eine Kraft zwischen zwei Deckbändern ausgeübt werden, so dass eine Vorspannung in den Deckbändern wieder hergestellt werden kann. Mit anderen Worten, die Schaufelreihe, deren Deckplatten einen Deckbandverbund darstellen, kann wieder so ausgebildet werden, dass eine Vorspannung entsteht.Thus, in a first advantageous embodiment, the bracing element is formed with a wedge piece, wherein the wedge piece is wedge-shaped and is arranged in the gap. The bracing element thus has a wedge piece, which projects into the gap and is wedge-shaped. By this particular shape of the wedge piece, a force between two shrouds can be exerted, so that a bias in the shrouds can be restored. With others In other words, the row of blades, whose cover plates represent a cover band composite, can be re-formed so that a bias voltage is created.
In einer weiteren vorteilhaften Weiterbildung wird das Verspannungselement T-förmig ausgebildet und das Keilstück senkrecht zum Querbalken angeordnet.In a further advantageous embodiment, the bracing element is T-shaped and arranged the wedge piece perpendicular to the crossbar.
Durch diese T-förmige Form wird ein Einsetzen des Verspannungselements in den schadhaften Spalt erleichtert. Des Weiteren wird aufgrund von Kräften, wie z.B. Fliehkräften, eine Bewegung des Verspannungselements zwischen den Deckbändern wirksam vermieden.This T-shaped form facilitates insertion of the bracing element into the damaged gap. Furthermore, due to forces such as e.g. Centrifugal forces, a movement of the bracing element between the shrouds effectively avoided.
Vorteilhafterweise wird dadurch das Verspannungselement derart angeordnet, dass der Querbalken unterhalb der Deckbänder liegt. Das bedeutet, dass der Querbalken im Strömungskanal angeordnet ist. Daher sollte der Querbalken keine unnötig große Form aufweisen.Advantageously, characterized the tension element is arranged such that the crossbar is below the shrouds. This means that the crossbeam is arranged in the flow channel. Therefore, the crossbeam should not have an unnecessarily large shape.
In einer weiteren vorteilhaften Weiterbildung wird durch das Einfügen des Verspannungselements eine Kraft zwischen den Deckbändern ausgeübt, was zu einem Auseinanderdrücken der Deckbänder führt. Dadurch ist eine Vorspannung im Deckbandverbund bzw. im Schaufelverbund wieder möglich.In a further advantageous embodiment, a force between the shrouds is exerted by the insertion of the bracing element, which leads to a pushing apart of the shrouds. As a result, a bias in the shroud composite or in the blade assembly is possible again.
Die Erfindung wird anhand eines Ausführungsbeispiels nun näher erläutert. Die Figuren zeigen hierbei in schematischer Weise die erfindungsgemäße Lösung an.The invention will now be explained in more detail with reference to an embodiment. The figures show in a schematic way the solution according to the invention.
Es zeigen:
Figur 1- eine Draufsicht auf zwei Deckbänder;
Figur 2- eine Querschnittansicht eines Teils einer Schaufelreihe;
Figur 3- eine perspektivische Ansicht eines Teils einer Schaufelreihe;
Figur 4- eine perspektivische Ansicht eines Teils einer Schaufelreihe.
- FIG. 1
- a plan view of two shrouds;
- FIG. 2
- a cross-sectional view of a portion of a blade row;
- FIG. 3
- a perspective view of a portion of a row of blades;
- FIG. 4
- a perspective view of a portion of a row of blades.
In der
Diese Schweißung kann unterhalb, außerhalb oder stirnseitig der ersten Deckplatte 1 bzw. zweiten Deckplatte 2 erfolgen als auch außerhalb der ersten Deckplatte 1 bzw. der zweiten Deckplatte 2.This welding can be done below, outside or at the front side of the
Die Deckplatten 1, 2 bilden im Verband umlaufend angeordnet ein Deckband.The
Das Verspannungselement 7 ist mit einem Keilstück 8 ausgebildet, das keilförmig ist und in dem Spalt 3 angeordnet wird. Das Keilstück 8 ist hierbei derart keilförmig ausgebildet, dass eine Bewegung des Keilstücks 8 in Richtung der ersten Deckplatte 1 bzw. der zweiten Deckplatte 2 eine Kraft ausübt, die zu einem Auseinanderdrücken der ersten Deckplatte 1 und zweiten Deckplatte 2 führt.The bracing
Das Verspannungselement 7 ist T-förmig ausgebildet, wobei das Keilstück 8 senkrecht auf dem Querbalken 9 angeordnet ist. Der Querbalken 9 ist somit innenseitig auf der ersten Deckplatte 1 bzw. zweiten Deckplatte 2 angeordnet.The bracing
Das Einfügen des Verspannungselements 7 führt zu einer Kraft zwischen der ersten Deckplatte 1 bzw. zweiten Deckplatte 2, die zum Auseinanderdrücken der ersten Deckplatte 1 bzw. zweiten Deckplatte 2 führt.The insertion of the bracing
Die
In der
Die
Die Erfindung kann in Dampfturbinen eingesetzt werden.The invention can be used in steam turbines.
Claims (5)
wobei die Schaufeln mit Deckplatten (1, 2) ausgebildet sind,
wobei zwischen zwei Deckplatten (1, 2) von benachbarten Schaufeln ein Spalt (6) auf Grund eines Schadens ausgebildet ist, mit den Schritten:
wherein the blades are formed with cover plates (1, 2),
wherein between two cover plates (1, 2) of adjacent blades a gap (6) is formed due to damage, comprising the steps of:
wobei das Verspannungselement (7) mit einem Keilstück (8) ausgebildet wird, das keilförmig ist und in dem Spalt (6) angeordnet wird.Method according to claim 1,
wherein the bracing element (7) is formed with a wedge piece (8) which is wedge-shaped and arranged in the gap (6).
wobei das Verspannungselement (7) T-förmig ausgebildet wird und das Keilstück (8) senkrecht zum Querbalken (9) angeordnet wird.Method according to claim 1 or 2,
wherein the bracing element (7) is formed T-shaped and the wedge piece (8) is arranged perpendicular to the transverse bar (9).
wobei das Verspannungselement (7) derart angeordnet wird, dass der Querbalken (9) unterhalb der Deckplatten (1, 2) liegt.Method according to claim 3,
wherein the bracing element (7) is arranged such that the transverse bar (9) lies below the cover plates (1, 2).
wobei durch das Einfügen des Verspannungselements (7) eine Kraft zwischen den Deckplatten (1, 2) erfolgt, die zum Auseinanderdrücken der Deckplatten (1, 2) führt.Method according to one of the preceding claims,
wherein by the insertion of the bracing member (7), a force between the cover plates (1, 2) takes place, which leads to the pressing apart of the cover plates (1, 2).
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13164028.6A EP2792848A1 (en) | 2013-04-17 | 2013-04-17 | Method for restoring the initial tension of the shroud of the blades of a gas turbine |
JP2016508079A JP2016515682A (en) | 2013-04-17 | 2014-04-04 | Method to recover the pretension of the cover plate |
PCT/EP2014/056813 WO2014170143A1 (en) | 2013-04-17 | 2014-04-04 | Method for restoring a cover plate pre-tension |
US14/784,130 US20160053615A1 (en) | 2013-04-17 | 2014-04-04 | Method for restoring a cover plate pretension |
CN201480021839.1A CN105121785A (en) | 2013-04-17 | 2014-04-04 | Method for restoring a cover plate pre-tension |
KR1020157029928A KR20150132537A (en) | 2013-04-17 | 2014-04-04 | Method for restoring a cover plate pre-tension |
EP14718537.5A EP2954165A1 (en) | 2013-04-17 | 2014-04-04 | Method for restoring a cover plate pre-tension |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13164028.6A EP2792848A1 (en) | 2013-04-17 | 2013-04-17 | Method for restoring the initial tension of the shroud of the blades of a gas turbine |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2792848A1 true EP2792848A1 (en) | 2014-10-22 |
Family
ID=48092840
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13164028.6A Withdrawn EP2792848A1 (en) | 2013-04-17 | 2013-04-17 | Method for restoring the initial tension of the shroud of the blades of a gas turbine |
EP14718537.5A Withdrawn EP2954165A1 (en) | 2013-04-17 | 2014-04-04 | Method for restoring a cover plate pre-tension |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14718537.5A Withdrawn EP2954165A1 (en) | 2013-04-17 | 2014-04-04 | Method for restoring a cover plate pre-tension |
Country Status (6)
Country | Link |
---|---|
US (1) | US20160053615A1 (en) |
EP (2) | EP2792848A1 (en) |
JP (1) | JP2016515682A (en) |
KR (1) | KR20150132537A (en) |
CN (1) | CN105121785A (en) |
WO (1) | WO2014170143A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3079263A1 (en) * | 2018-03-20 | 2019-09-27 | Safran Aircraft Engines | FITTING DEVICE FOR DAWN HEEL |
US20190337102A1 (en) * | 2018-05-07 | 2019-11-07 | General Electric Company | Interlocking Stage of Airfoils |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110939487A (en) * | 2019-12-06 | 2020-03-31 | 江苏核电有限公司 | A device and method for treating low-pressure rotor blade shroud clearance of a steam turbine |
Citations (3)
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EP0999009A1 (en) * | 1998-11-02 | 2000-05-10 | General Electric Company | Method of applying wear-resistant materials to turbine blades, and turbine blades having wear-resistant materials |
EP1375823A2 (en) * | 2002-06-28 | 2004-01-02 | General Electric Company | A method for repairing shroud tip overlap on turbine buckets |
US20050042092A1 (en) * | 2003-07-23 | 2005-02-24 | Andreas Boegli | Method of reconditioning a turbine blade |
Family Cites Families (9)
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FR2511908A1 (en) * | 1981-08-26 | 1983-03-04 | Snecma | BRAZING-DIFFUSION PROCESS FOR PIECES IN SUPERALLOYS |
JPS61132703A (en) * | 1984-12-01 | 1986-06-20 | Toshiba Corp | Rotor blade of steam turbine |
JPS6252203U (en) * | 1985-09-18 | 1987-04-01 | ||
US5785496A (en) * | 1997-02-24 | 1998-07-28 | Mitsubishi Heavy Industries, Ltd. | Gas turbine rotor |
JP2002213204A (en) * | 2001-01-15 | 2002-07-31 | Toshiba Corp | Turbine moving blade and turbine |
JP2003097215A (en) * | 2001-09-19 | 2003-04-03 | Mitsubishi Heavy Ind Ltd | Blade structure for turbine rotor and turbo machine |
JP2004052757A (en) * | 2002-05-31 | 2004-02-19 | Toshiba Corp | Turbine moving blade |
US20070079507A1 (en) * | 2005-10-12 | 2007-04-12 | Kenny Cheng | Blade shroud repair |
CN101285404B (en) * | 2008-06-03 | 2011-08-03 | 东方电气集团东方汽轮机有限公司 | Steam turbine rotor blades cover band structure and its machining process |
-
2013
- 2013-04-17 EP EP13164028.6A patent/EP2792848A1/en not_active Withdrawn
-
2014
- 2014-04-04 KR KR1020157029928A patent/KR20150132537A/en not_active Ceased
- 2014-04-04 EP EP14718537.5A patent/EP2954165A1/en not_active Withdrawn
- 2014-04-04 WO PCT/EP2014/056813 patent/WO2014170143A1/en active Application Filing
- 2014-04-04 CN CN201480021839.1A patent/CN105121785A/en active Pending
- 2014-04-04 US US14/784,130 patent/US20160053615A1/en not_active Abandoned
- 2014-04-04 JP JP2016508079A patent/JP2016515682A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0999009A1 (en) * | 1998-11-02 | 2000-05-10 | General Electric Company | Method of applying wear-resistant materials to turbine blades, and turbine blades having wear-resistant materials |
EP1375823A2 (en) * | 2002-06-28 | 2004-01-02 | General Electric Company | A method for repairing shroud tip overlap on turbine buckets |
US20050042092A1 (en) * | 2003-07-23 | 2005-02-24 | Andreas Boegli | Method of reconditioning a turbine blade |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3079263A1 (en) * | 2018-03-20 | 2019-09-27 | Safran Aircraft Engines | FITTING DEVICE FOR DAWN HEEL |
US20190337102A1 (en) * | 2018-05-07 | 2019-11-07 | General Electric Company | Interlocking Stage of Airfoils |
EP3567214A1 (en) * | 2018-05-07 | 2019-11-13 | General Electric Company | Method for restoring in-situ the initial tension of the shroud of the blades of a gas turbine |
Also Published As
Publication number | Publication date |
---|---|
WO2014170143A1 (en) | 2014-10-23 |
US20160053615A1 (en) | 2016-02-25 |
JP2016515682A (en) | 2016-05-30 |
KR20150132537A (en) | 2015-11-25 |
EP2954165A1 (en) | 2015-12-16 |
CN105121785A (en) | 2015-12-02 |
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