EP2088287A1 - Assembly for axial protection on rotor blades in a rotor of a gas turbine - Google Patents
Assembly for axial protection on rotor blades in a rotor of a gas turbine Download PDFInfo
- Publication number
- EP2088287A1 EP2088287A1 EP08002388A EP08002388A EP2088287A1 EP 2088287 A1 EP2088287 A1 EP 2088287A1 EP 08002388 A EP08002388 A EP 08002388A EP 08002388 A EP08002388 A EP 08002388A EP 2088287 A1 EP2088287 A1 EP 2088287A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- metal strip
- rotor
- blades
- geometry
- sealing element
- 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
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/321—Rotors specially for elastic fluids for axial flow pumps for axial flow compressors
- F04D29/322—Blade mountings
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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
- F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
- F01D5/32—Locking, e.g. by final locking blades or keys
- F01D5/323—Locking of axial insertion type blades by means of a key or the like parallel to the axis of the rotor
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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
- F05D2300/00—Materials; Properties thereof
- F05D2300/50—Intrinsic material properties or characteristics
- F05D2300/505—Shape memory behaviour
Definitions
- the invention relates to an arrangement for axial securing of rotor blades in a rotor of a gas turbine according to the features of the preamble of claim 1.
- the assembly 10 comprises a shaft collar 21 formed by a rotor disk 19, which shaft collar 21 is part of the rotor 23 of a gas turbine.
- the blade feet 54 of the respective blades 14 are inserted, which are secured against displacement along the groove 12.
- sealing elements 16 are provided, which cover the end-side opening of the respective groove 12 at least partially and the assembled form a frontal sealing ring.
- an annular groove 20 is provided in which sit in the substantially rectangular sealing elements 16.
- the sealing elements 16 lie in grooves 24, which are provided on the undersides 26 of the platforms 28 of the blades 14.
- at least one of the sealing elements 16 comprises a metal strip 30 fastened thereto with a leg 64, which leg 64 either on the rotor blades 14 or their platforms 28 (FIG. FIG. 1 ) or on the rotor disk 19 (FIG. FIG. 2 ) itself positively rests.
- the sealing elements 16 also have the task of guiding a cooling air flow along the end face of the rotor disk 19.
- the object of the invention is therefore to provide an arrangement for axial securing of blades in a rotor of a gas turbine, in which the sealing elements are particularly reliable mountable and disassembled.
- the solution provides that the material of the metal strip is a shape memory alloy.
- the shape memory alloy as the material for the metal strip, both the assembly and the functional reliability of the metal strip can be increased.
- Made of shape memory alloys components are characterized by the fact that they can permanently change their outer shape while maintaining high strength by the action of temperature. These components may therefore have a first geometry, i. Shape, contour and have a second geometry. These components can be deformed back from the second geometry to the first geometry solely by a heat treatment.
- the geometry which the metal strip assumes after heat treatment is also referred to below as functional geometry.
- the second geometry can be almost arbitrary and can be specified during manufacture of the component.
- the sheet metal strip is produced in such a form as it should later secure the position of the sealing elements in the installed state.
- This preliminary shape corresponds to the first geometry.
- Even before installation of the sheet metal strip is then deformed in a suitable manner in the second geometry, so that it can be attached to the sealing element.
- the sealing element is mounted on the shaft collar.
- a temperature treatment whereby the metal strip tries to reform into its first geometry.
- the temperature treatment can either be done before starting the gas turbine by heating by means of an external heat source. Or the first operation of the gas turbine, in which high temperatures occur, can trigger the deformation of the metal strip. It is also possible that both temperature treatments are applied to achieve a final deformation of the sheet metal strip.
- the metal strip has assumed its functional geometry and secures the sealing element both against loss from a shift in the circumferential direction. If function geometry and first geometry differ from each other, a prestressed attachment of sealing element resp. Sheet metal strips are achieved.
- the material has a one-way effect. This means that a single change in shape takes place when the metal strip, which has previously been deformed pseudoplastic in the martensitic state, is heated up. Cooling after heating causes no change in shape. The metal strip remains in its first geometry or functional geometry.
- the leg of the sheet metal strip is after playing thermal treatment either with play, without play or under a bias on the blades or on the shaft collar.
- the embodiments known from the prior art can be developed in this way.
- the bias generated by the metal strip according to the invention then acts namely between the blade and sealing element that the seated in the groove outer end of the sealing element due to the bias against a side wall of the groove, which is arranged in the bottom of the platform of the blade, can be pressed flat.
- the flat pressing leads to a particularly dense concern of the sealing element in the outer groove. Leakage of cooling air conducted by the sealing element, which leakage could occur between the outer end of the sealing element and the groove, can thereby be reduced and at best avoided.
- the metal strip 30 shown there may be according to the invention of a shape memory alloy.
- illustrated geometry of the metal strip 30 represents the first geometry.
- the metal strip 30 can then be deformed back into the functional geometry by a heat treatment and the positive connection between itself and the platforms 28 (FIG. FIG. 1 ) or the rotor disk 19 (FIG. FIG. 2 ) produce. If the functional geometry corresponds to the first geometry, the sheet-metal strip 30 and thus the sealing element 16 sits unrestrained or with play on the rotor 23.
- embodiment of the inventively designed metal strip 30, which has a functional geometry that differs at least slightly from the first geometry, so as to a bias between blade 14, respectively.
- a bias voltage is achieved when the first geometry of the sheet metal strip 30 is chosen so that it can not be achieved despite the heat treatment due to a mechanical blockage by other machine components.
- the metal strip 30 remains in the functional geometry and biased against the blocking machine component.
- the blocking machine component may be formed by the groove 24, the annular groove 20, the platform 28 of the blade 14 or by the shaft collar 21.
- the sealing element 16 can be sealed radially outwardly against the side wall of the groove 24 located in the underside 26 of the platform 28 and / or radially inwardly against a side wall of the annular groove 20 be pressed, whereby a leakage of the sealing element guided cooling air can be reduced and possibly even avoided.
- FIGS. 3 to 7 different configurations with different metal strips 30 shown. All sheet metal strips 30 shown therein have in common that they are fastened in a suitable manner to a sealing element 16.
- Each of the Figure 3-7 contains three partial representations, which have either the suffix a, b or c.
- the partial representations according to suffix a show the sheet-metal strip 30 according to the invention in its original geometry, ie first geometry, wherein the sheet-metal strip 30 is fastened to the sealing element 16 with suitable means but not further illustrated.
- the metal strips 30 are transferred by a pseudoplastic deformation in the second geometry.
- the partial representations according to suffix b show the respective metal strip 30 having the second geometry in the installation or assembly situation.
- the metal strips 30 are each shown in their functional geometry, which you after a single successful Achieve warming and which they then permanently with high strength maintained.
- closure element 40 is shown, with which the metal strip 30 can be brought into positive engagement.
- the sheet metal strip 30 is only subjected to the heat treatment, so that it tries to get from the second geometry in the first geometry.
- the closure element 40 can be configured as desired and places in the FIGS. 3 to 7 Representing either arranged on the shaft collar 21 pocket or arranged between the platforms 26 adjacent blades 14, tapered recess in an abstract manner.
- the inventive consisting of a shape memory alloy, for securing the sealing element 16 against displacement in the circumferential direction attached thereto sheet metal strip 30 has a cross-sectionally L-shaped, first geometry.
- the sheet-metal strip comprises two legs 62, 64.
- One of the two legs of the sheet-metal strip, for example the leg 62, is fastened to the sealing element 16 by suitable means.
- the leg 62 of the sheet metal strip 30 may be soldered to the sealing element 16.
- the other leg 64 then serves for the positive fastening of the sealing element 16 or the metal strip 30 in a recess 38.
- the recess 38 may also alternatively, as in FIG. 1 shown to be tapered between the platforms 28 of two immediately adjacent blades 14. Or the recess 38 can be formed by two teeth 68 arranged on the rotor disk 19 ( FIG. 2 ).
- FIG. 3 alternative embodiment of the metal strip 30 shows FIG. 4 ,
- the metal strip 30 comprises in the first geometry according to FIGS. 4a, 4c a beaded end 65, which can be converted by a pseudoplastic deformation in a second geometry.
- the end 65 is plate-shaped formed, which allows the mounting of the sealing element in the arrangement.
- FIG. 5 and FIG. 6 show embodiments of a closure element 40 and a metal strip 30, in which the geometry of the closure element 40 and the first geometry of the sheet metal strip are selected so that a biasing force of metal strip 30 can act on the closure member 40.
- a biasing force of metal strip 30 By means of the biasing force is a play-free attachment of metal strips 30 respectively.
- Sealing element 16 is achieved on the closure element 40.
- the function geometry differs from the first geometry.
- the achievement of the first geometry of the shape memory alloy existing metal strip 30 during the heat treatment is prevented due to the selected shape of the closure member 40 by the complete recovery of the metal strip 30 is at least partially blocked by the closure member 40.
- a play-free and prestressed attachment of sealing element 16 and closure element 40 can be achieved. Consequently, the embodiment differs according to FIG. 5 from FIG. 3 only in the form and contour of the closure element.
- FIG. 7 shows an advanced construction according to FIG. 3 ,
- a further element 60 is attached from a non-shape memory alloy.
- the element 60 may be designed as a pin-shaped. After the heat treatment, the element 60 is in a recess 70, whereby the metal strip 30 respectively. the sealing element 16 is positively locked against movement relative to the closure element 40.
- All embodiments have in common that a particularly reliable mounting of the sealing element can be achieved by using a shape memory alloy as the material of the metal strip, without it may come to unwanted damage to the sealing element due to manual bending processes.
- pre-strained fastening of the sealing element on the rotor can be achieved by cleverly matched components, which reduces leakage of cooling air through the otherwise existing play-seated seat of the sealing element in the groove.
- the invention provides an arrangement for the axial securing of rotor blades of a gas turbine, which comprises a sealing element arranged on the end face of the rotor, which can be fastened particularly reliably by means of a sheet metal strip consisting of a shape memory alloy.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Gasket Seals (AREA)
Abstract
Description
Die Erfindung betrifft eine Anordnung zur Axialsicherung von Laufschaufeln in einem Rotor einer Gasturbine gemäß den Merkmalen des Oberbegriffs des Anspruchs 1.The invention relates to an arrangement for axial securing of rotor blades in a rotor of a gas turbine according to the features of the preamble of claim 1.
Aus der
Bei der Montage der Dichtelemente sowie beim Einbiegen des Blechstreifens können diese jedoch unsachgemäß plastisch verformt werden, so dass das Dichtblech unter zu großem Spiel in der Ringnut sitzen kann. Hierdurch kann es zu Kühlluftverlusten kommen. Außerdem kann durch die nicht vorgesehene plastische Verformung die Integrität des Dichtelements und des Blechstreifens negativ beeinflusst werden.When installing the sealing elements and when bending the metal strip, however, these can be deformed improperly plastic, so that the sealing plate can sit under too much play in the annular groove. This can lead to cooling air losses. In addition, the integrity of the sealing element and the metal strip can be adversely affected by the unintentional plastic deformation.
Aufgabe der Erfindung ist daher die Bereitstellung einer Anordnung zur Axialsicherung von Laufschaufeln in einem Rotor einer Gasturbine, bei welcher die Dichtelemente besonders zuverlässig montierbar und demontierbar sind.The object of the invention is therefore to provide an arrangement for axial securing of blades in a rotor of a gas turbine, in which the sealing elements are particularly reliable mountable and disassembled.
Die Lösung sieht vor, dass das Material des Blechstreifens eine Formgedächtnislegierung ist. Durch die Verwendung der Formgedächtnislegierung als Material für den Blechstreifen kann sowohl die Montage als auch die Funktionszuverlässigkeit des Blechstreifens gesteigert werden.The solution provides that the material of the metal strip is a shape memory alloy. By using the shape memory alloy as the material for the metal strip, both the assembly and the functional reliability of the metal strip can be increased.
Aus Formgedächtnislegierungen hergestellte Bauteile zeichnen sich dadurch aus, dass diese durch Temperatureinwirkung ihre äußere Form unter Aufrechterhaltung großer Festigkeit dauerhaft ändern können. Diese Bauteile können also eine erste Geometrie d.h. Form, Kontur und eine zweite Geometrie aufweisen. Diese Bauteile können von der zweiten Geometrie in die erste Geometrie allein durch eine Wärmebehandlung zurückverformt werden. Diejenige Geometrie, welche der Blechstreifen nach erfolgter Wärmebehandlung einnimmt, wird nachfolgend auch Funktionsgeometrie genannt. Die zweite Geometrie kann nahezu beliebig sein und lässt sich beim Herstellen des Bauteils vorgeben.Made of shape memory alloys components are characterized by the fact that they can permanently change their outer shape while maintaining high strength by the action of temperature. These components may therefore have a first geometry, i. Shape, contour and have a second geometry. These components can be deformed back from the second geometry to the first geometry solely by a heat treatment. The geometry which the metal strip assumes after heat treatment is also referred to below as functional geometry. The second geometry can be almost arbitrary and can be specified during manufacture of the component.
Der in der Veröffentlichung
Der Blechstreifen wird in einer derartigen Form hergestellt, wie er später in eingebautem Zustand die Lage der Dichtelemente sichern soll. Diese vorläufige Form entspricht der ersten Geometrie. Noch vor dem Einbau wird der Blechstreifen dann in einer geeigneten Weise in die zweite Geometrie verformt, so dass er an das Dichtelement befestigt werden kann. Anschließend wird das Dichtelement an den Wellenbund montiert. Nach dem Einbau erfolgt eine Temperaturbehandlung, wodurch der Blechstreifen versucht, sich in seine erste Geometrie zurückzuformen. Die Temperaturbehandlung kann entweder noch vor Inbetriebnahme der Gasturbine durch eine Aufheizung mittels einer externen Heizquelle erfolgen. Oder der Erstbetrieb der Gasturbine, bei dem hohe Temperaturen auftreten, kann die Verformung des Blechstreifens auslösen. Es ist auch möglich, dass beide Temperaturbehandlungen angewendet werden, um eine endgültige Verformung des Blechstreifens zu erreichen. Nach der Temperaturbehandlung hat der Blechstreifen seine Funktionsgeometrie angenommen und sichert das Dichtelement sowohl gegen Verlust aus auch gegen eine Verschiebung in Umfangsrichtung. Sofern Funktionsgeometrie und erste Geometrie voneinander abweichen, kann eine vorgespannte Befestigung von Dichtelement resp. Blechstreifen erreicht werden.The sheet metal strip is produced in such a form as it should later secure the position of the sealing elements in the installed state. This preliminary shape corresponds to the first geometry. Even before installation of the sheet metal strip is then deformed in a suitable manner in the second geometry, so that it can be attached to the sealing element. Subsequently, the sealing element is mounted on the shaft collar. After installation, a temperature treatment, whereby the metal strip tries to reform into its first geometry. The temperature treatment can either be done before starting the gas turbine by heating by means of an external heat source. Or the first operation of the gas turbine, in which high temperatures occur, can trigger the deformation of the metal strip. It is also possible that both temperature treatments are applied to achieve a final deformation of the sheet metal strip. After the temperature treatment, the metal strip has assumed its functional geometry and secures the sealing element both against loss from a shift in the circumferential direction. If function geometry and first geometry differ from each other, a prestressed attachment of sealing element resp. Sheet metal strips are achieved.
Insgesamt wird hierdurch eine besonders einfache und sichere Montage des Blechstreifens resp. des Dichtelementes am Wellenbund des Rotors ermöglicht, wodurch die beim Stand der Technik auftretenden Nachteile vermieden werden können. Ein manuelles Einbiegen des Blechstreifens braucht somit nur in eingeschränkten Umfang zu erfolgen, oder bestenfalls gar nicht. Dementsprechend können manuelle Fehlmontagen ausgeschlossen werden, was die Zuverlässigkeit der damit ausgestatteten Gasturbine erhöht.Overall, this is a particularly simple and safe installation of the metal strip resp. allows the sealing element on the shaft collar of the rotor, whereby the disadvantages occurring in the prior art can be avoided. A manual bending of the metal strip thus needs to be done only to a limited extent, or at best not at all. Accordingly, manual misfits can be eliminated, which increases the reliability of the gas turbine equipped therewith.
Vorteilhafte Ausgestaltungen sind in den Unteransprüchen angegeben.Advantageous embodiments are specified in the subclaims.
Vorzugsweise weist das Material einen Einweg-Effekt auf. Dies bedeutet, dass beim Aufheizen des zuvor im martensitischen Zustand pseudoplastisch verformten Blechstreifens eine einmalige Formänderung erfolgt. Das Abkühlen nach erfolgter Aufheizung bewirkt keine Formänderung mehr. Der Blechstreifen verbleibt in seiner ersten Geometrie bzw. Funktionsgeometrie.Preferably, the material has a one-way effect. This means that a single change in shape takes place when the metal strip, which has previously been deformed pseudoplastic in the martensitic state, is heated up. Cooling after heating causes no change in shape. The metal strip remains in its first geometry or functional geometry.
Gemäß einer weiter vorteilhaften Ausgestaltung der Erfindung liegt der Schenkel des Blechstreifens nach erfolgter thermischer Behandlung entweder spielbehaftet, spielfrei oder unter einer Vorspannung an den Laufschaufeln oder am Wellenbund an.According to a further advantageous embodiment of the invention, the leg of the sheet metal strip is after playing thermal treatment either with play, without play or under a bias on the blades or on the shaft collar.
Insbesondere, wenn der Schenkel unter einer Vorspannung an den Laufschaufeln oder am Wellenbund anliegt, kann eine besonders zuverlässige Verbindung und Befestigung des Dichtelements am Wellenbund bzw. am Rotor ermöglicht werden. Vorzugsweise können die in aus dem Stand der Technik bekannten Ausgestaltungen derartig weitergebildet werden. Die vom erfindungsgemäßen Blechstreifen erzeugte Vorspannung wirkt dann nämlich so zwischen Laufschaufel und Dichtelement, dass das in der Nut sitzende äußere Ende des Dichtelements aufgrund der Vorspannung gegen eine Seitenwand der Nut, welche in der Unterseite der Plattform der Laufschaufel angeordnet ist, flächig angepresst werden kann. Das flächige Anpressen führt zu einem besonders dichten Anliegen des Dichtelements in der äußeren Nut. Eine Leckage von vom Dichtelement geleiteter Kühlluft, welche Leckage zwischen dem äußeren Ende des Dichtelements und der Nut auftreten könnte, kann dadurch verringert und bestenfalls vermieden werden. Gleiches gilt für das radial innen in der Ringnut angeordnete innere Ende des Dichtelements, wenn der Blechstreifen sich am Wellenbund vorgespannt abstützt und dabei das innere Ende des Dichtelements an eine Seitenwand der Ringnut dicht und flächig anpresst.In particular, when the leg rests under a bias on the blades or on the shaft collar, a particularly reliable connection and attachment of the sealing element on the shaft collar or on the rotor can be made possible. Preferably, the embodiments known from the prior art can be developed in this way. The bias generated by the metal strip according to the invention then acts namely between the blade and sealing element that the seated in the groove outer end of the sealing element due to the bias against a side wall of the groove, which is arranged in the bottom of the platform of the blade, can be pressed flat. The flat pressing leads to a particularly dense concern of the sealing element in the outer groove. Leakage of cooling air conducted by the sealing element, which leakage could occur between the outer end of the sealing element and the groove, can thereby be reduced and at best avoided. The same applies to the inner end of the sealing element, which is arranged radially inward in the annular groove, when the sheet metal strip is supported in a prestressed manner on the shaft collar and presses the inner end of the sealing element against a side wall of the annular groove in a sealed and flat manner.
Es ist auch denkbar, dass am Blechstreifen ein weiteres Bauteil aus einer nicht Formgedächtnislegierung angebracht ist, um einen verbesserten Formschluss zur Sicherung des Dichtelements zu erreichen.It is also conceivable that a further component made of a non-shape memory alloy is attached to the metal strip, to achieve an improved positive connection for securing the sealing element.
Die Erfindung wird anhand eines in einer Zeichnung dargestellten Ausführungsbeispiels erläutert, wobei identische Bauteile mit gleichen Bezugszeichen versehen sind. Aus der Erläuterung ergeben sich weitere Vorteile und Merkmale.
- FIG 1, 2
- zeigen zwei Anordnungen von Axialsicherungen von Laufschaufeln.
- FIG 3 - 7
- zeigen weitere unterschiedliche Konstruktionen der Befestigung des aus dem Stand der Technik bekannten Dichtelements mit einem erfindungsgemäßen Blechstreifen aus einer Formgedächtnislegierung in rein schematischer Darstellung.
- FIG. 1, 2
- show two arrangements of axial securing of blades.
- 3 - 7
- show further different constructions of the attachment of the known from the prior art sealing element with a sheet metal strip according to the invention from a shape memory alloy in a purely schematic representation.
Bezug nehmend auf die Beschreibung der
Besonders bevorzugt ist dagegen diejenige Ausgestaltung des erfindungsgemäß ausgebildeten Blechstreifens 30, welche eine Funktionsgeometrie aufweist, die sich zumindest geringfügig von der ersten Geometrie unterscheidet, um so eine Vorspannung zwischen Laufschaufel 14 resp. Wellenbund 21 einerseits und Dichtelement 16 andererseits zu erzeugen. Eine Vorspannung wird erreicht, wenn die erste Geometrie des Blechstreifens 30 so gewählt ist, dass diese trotz der Wärmebehandlung aufgrund einer mechanischen Blockade durch andere Maschinenbauteile nicht erreicht werden kann. In diesem Fall verbleibt nach erfolgter Wärmebehandlung der Blechstreifen 30 in der Funktionsgeometrie und liegt dabei vorgespannt an dem blockierenden Maschinenbauteil an. Das blockierende Maschinenbauteil kann von der Nut 24, der Ringnut 20, der Plattform 28 der Laufschaufel 14 oder auch vom Wellenbund 21 gebildet werden. Sofern die Funktionsgeometrie so gewählt wird, dass sich eine senkrecht zur Zeichnungsebene gerichtete Vorspannung ergibt, kann das Dichtelement 16 radial außen an die Seitenwand der in der Unterseite 26 der Plattform 28 angeordneten Nut 24 und/oder radial innen an eine Seitenwand der Ringnut 20 flächig dichtend angepresst werden, wodurch eine Leckage von vom Dichtelement geführter Kühlluft reduziert und ggf. sogar vermieden werden kann.Particularly preferred, however, is that embodiment of the inventively designed
Anstelle der in
Bezüglich der
Eine zu
Den Ausgestaltungen gemäß
Allen Ausführungsbeispielen ist gemein, dass durch die Verwendung einer Formgedächtnislegierung als Material des Blechstreifens eine besonders zuverlässige Montage des Dichtelements erreicht werden kann, ohne dass es aufgrund von manuellen Biegeprozessen zu ungewollten Beschädigungen des Dichtelements kommen kann. Außerdem kann durch geschickt aufeinander abgestimmte Bauteile eine vorgespannte Befestigung des Dichtelements am Rotor erzielt werden, was eine Leckage von Kühlluft durch den ansonsten vorhandenen spielbehafteten Sitz des Dichtelements in der Nut verringert.All embodiments have in common that a particularly reliable mounting of the sealing element can be achieved by using a shape memory alloy as the material of the metal strip, without it may come to unwanted damage to the sealing element due to manual bending processes. In addition, by pre-strained fastening of the sealing element on the rotor can be achieved by cleverly matched components, which reduces leakage of cooling air through the otherwise existing play-seated seat of the sealing element in the groove.
Insgesamt wird mit der Erfindung eine Anordnung zur Axialsicherung von Laufschaufeln eines Rotors einer Gasturbine angegeben, welches ein an der stirnseitigen Fläche des Rotors angeordnetes Dichtelement umfasst, welches mittels eines aus einer Formgedächtnislegierung bestehenden Blechstreifens besonders zuverlässig befestigt werden kann.Overall, the invention provides an arrangement for the axial securing of rotor blades of a gas turbine, which comprises a sealing element arranged on the end face of the rotor, which can be fastened particularly reliably by means of a sheet metal strip consisting of a shape memory alloy.
Claims (5)
mit einem Wellenbund (21), an dessen Außenumfang (52) in Axialrichtung des Rotors (23) verlaufende Laufschaufelhaltenuten (12) vorgesehen sind, in denen jeweils Laufschaufeln (14) mit zur Laufschaufelhaltenut (12) korrespondierenden Schaufelfüßen (54) angeordnet sind,
mit einem an einer stirnseitigen Seitenfläche (56) des Wellenbundes (21) im Bereich der Laufschaufelhaltenuten (12) angeordnete, radial nach außen offene umlaufende Nut (20) vorgesehen ist,
wobei zur Axialsicherung der Laufschaufeln (14) jeweils in der umlaufenden Nut (20) blechförmige Dichtelemente (16) sitzen, die in Umfangsrichtung einen stirnseitigen Dichtring bilden,
wobei zur Sicherung der Dichtelemente (16) gegen eine Verschiebung in Umfangsrichtung mindestens eines der Dichtelemente (16) einen an diesem befestigten Blechstreifen (30) mit einem Schenkel (64) umfasst, welcher an den Laufschaufeln (14) oder am Wellenbund (21) formschlüssig anliegt,
dadurch gekennzeichnet, dass
das Material des Blechstreifens (30) eine Formgedächtnis-Legierung ist.Arrangement (10) for axial securing of moving blades (14) in a rotor (23),
with a shaft collar (21), on the outer circumference (52) in the axial direction of the rotor (23) extending blade holding grooves (12) are provided, in each of which blades (14) are arranged with the bucket holding groove (12) corresponding blade roots (54),
is provided with a radially outwardly open circumferential groove (20) arranged on an end-face side surface (56) of the shaft collar (21) in the region of the blade holding grooves (12),
wherein in order to axially secure the rotor blades (14) in each case in the circumferential groove (20) sheet-shaped sealing elements (16) sit, which form a frontal sealing ring in the circumferential direction,
wherein for securing the sealing elements (16) against displacement in the circumferential direction of at least one of the sealing elements (16) has a sheet metal strip (30) attached thereto with a leg (64), which on the rotor blades (14) or on the shaft collar (21) positively is applied,
characterized in that
the material of the sheet metal strip (30) is a shape memory alloy.
bei der das Material einen Einweg-Effekt aufweist.Arrangement (10) according to claim 1,
where the material has a one-way effect.
bei der der Schenkel (64) des Blechstreifens (30) nach erfolgter thermischer Behandlung spielbehaftet, spielfrei oder unter einer Vorspannung an den Laufschaufeln (14) oder am Wellenbund (21) anliegt.Arrangement (10) according to claim 1 or 2,
in which the leg (64) of the sheet-metal strip (30) rests with clearance after the thermal treatment, without play or under a prestress against the rotor blades (14) or against the shaft collar (21).
bei der der Schenkel (64) des Blechstreifens (30) nach erfolgter thermischer Behandlung unter einer Vorspannung an den Laufschaufeln (14) oder am Wellenbund (21) anliegt und dabei das Dichtelement (16) an eine Seitenwand der Nut (24) resp. Ringnut (20) anpresst.Arrangement (10) according to claim 1 or 2,
in which the leg (64) of the sheet-metal strip (30) after thermal treatment under a bias to the blades (14) or on the shaft collar (21) rests while the sealing element (16) to a side wall of the groove (24), respectively. Press annular groove (20).
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08002388A EP2088287A1 (en) | 2008-02-08 | 2008-02-08 | Assembly for axial protection on rotor blades in a rotor of a gas turbine |
CN2009801044998A CN101939509B (en) | 2008-02-08 | 2009-01-14 | Arrangement for axially securing blades in a rotor of a gas turbine |
JP2010545421A JP5002063B2 (en) | 2008-02-08 | 2009-01-14 | Device for axially fixing a rotating blade in a rotor of a gas turbine |
EP09707238A EP2238314B1 (en) | 2008-02-08 | 2009-01-14 | Arrangement for axially securing blades in a rotor of a gas turbine |
PCT/EP2009/050363 WO2009098111A1 (en) | 2008-02-08 | 2009-01-14 | Arrangement for axially securing blades in a rotor of a gas turbine |
US12/866,072 US8535012B2 (en) | 2008-02-08 | 2009-01-14 | Arrangement for axially securing blades in a rotor of a gas turbine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08002388A EP2088287A1 (en) | 2008-02-08 | 2008-02-08 | Assembly for axial protection on rotor blades in a rotor of a gas turbine |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2088287A1 true EP2088287A1 (en) | 2009-08-12 |
Family
ID=39800566
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08002388A Withdrawn EP2088287A1 (en) | 2008-02-08 | 2008-02-08 | Assembly for axial protection on rotor blades in a rotor of a gas turbine |
EP09707238A Not-in-force EP2238314B1 (en) | 2008-02-08 | 2009-01-14 | Arrangement for axially securing blades in a rotor of a gas turbine |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09707238A Not-in-force EP2238314B1 (en) | 2008-02-08 | 2009-01-14 | Arrangement for axially securing blades in a rotor of a gas turbine |
Country Status (5)
Country | Link |
---|---|
US (1) | US8535012B2 (en) |
EP (2) | EP2088287A1 (en) |
JP (1) | JP5002063B2 (en) |
CN (1) | CN101939509B (en) |
WO (1) | WO2009098111A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2372095A1 (en) * | 2010-03-26 | 2011-10-05 | Siemens Aktiengesellschaft | Method and device for fixing a blade to a rotor using a memory shape element |
CN112302766A (en) * | 2020-10-15 | 2021-02-02 | 绍兴宾果科技有限公司 | Three-way catalytic robot with tail gas energy recovery function |
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Publication number | Priority date | Publication date | Assignee | Title |
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CH704526A1 (en) | 2011-02-28 | 2012-08-31 | Alstom Technology Ltd | Seal assembly for a thermal machine. |
US9017013B2 (en) | 2012-02-07 | 2015-04-28 | Siemens Aktiengesellschaft | Gas turbine engine with improved cooling between turbine rotor disk elements |
EP2789800B1 (en) * | 2013-04-09 | 2017-06-14 | MTU Aero Engines AG | Lock plates assortment, corresponding gas turbine and method of assembly |
EP2860350A1 (en) * | 2013-10-10 | 2015-04-15 | Siemens Aktiengesellschaft | Turbine blade and gas turbine |
EP2896792A1 (en) * | 2014-01-21 | 2015-07-22 | Alstom Technology Ltd | Mechanical fastening system for rotating or stationary components |
CN106678137A (en) * | 2015-11-06 | 2017-05-17 | 宏碁股份有限公司 | Clamping mechanism and assembly method thereof |
GB2587281B (en) | 2018-07-19 | 2022-11-23 | Halliburton Energy Services Inc | Techniques to improve wireless communications for in-situ wellbore devices |
NO20210649A1 (en) | 2018-12-26 | 2021-05-20 | Halliburton Energy Services Inc | Method and system for creating metal-to-metal seal |
CN113217533A (en) * | 2021-05-18 | 2021-08-06 | 人本股份有限公司 | Novel sealed ball bearing |
CN113494522A (en) * | 2021-07-20 | 2021-10-12 | 人本股份有限公司 | Rolling bearing capable of automatically eliminating installation inclination angle |
CN113653737B (en) * | 2021-07-28 | 2022-10-21 | 人本股份有限公司 | Anti-drop bearing of sealing washer |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0258754A2 (en) * | 1986-09-03 | 1988-03-09 | Mtu Motoren- Und Turbinen-Union MàNchen Gmbh | Turbine blade with a cooling insert |
JPS6469702A (en) * | 1987-09-09 | 1989-03-15 | Hitachi Ltd | Fixation of movable blade of axial flow rotary machine |
FR2715968A1 (en) * | 1994-02-10 | 1995-08-11 | Snecma | Separating platform, fitting between blades on rotor |
WO2002066844A1 (en) * | 2001-02-23 | 2002-08-29 | Siemens Aktiengesellschaft | Assembling element for connecting two objects, especially two device parts |
DE102004030965A1 (en) * | 2004-06-26 | 2006-02-09 | Fag Kugelfischer Ag & Co. Ohg | Locking washer for fastening nut on threaded shaft has lugs around its inner circumference mounted on joints made from shape memory alloy which swivel to hold nut more securely when temperature rises |
WO2007028703A1 (en) | 2005-09-07 | 2007-03-15 | Siemens Aktiengesellschaft | Arrangement for axially securing rotating blades in a rotor and use |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2641443A (en) * | 1951-03-17 | 1953-06-09 | A V Roe Canada Ltd | Rotor blade locking |
JPS61129405A (en) * | 1984-11-28 | 1986-06-17 | Hitachi Ltd | Fixing method of turbine moving blade |
US5518369A (en) * | 1994-12-15 | 1996-05-21 | Pratt & Whitney Canada Inc. | Gas turbine blade retention |
JP2007120460A (en) * | 2005-10-31 | 2007-05-17 | Toshiba Corp | Fixing and attaching/detaching method and device of turbine blade |
-
2008
- 2008-02-08 EP EP08002388A patent/EP2088287A1/en not_active Withdrawn
-
2009
- 2009-01-14 JP JP2010545421A patent/JP5002063B2/en not_active Expired - Fee Related
- 2009-01-14 US US12/866,072 patent/US8535012B2/en not_active Expired - Fee Related
- 2009-01-14 CN CN2009801044998A patent/CN101939509B/en not_active Expired - Fee Related
- 2009-01-14 WO PCT/EP2009/050363 patent/WO2009098111A1/en active Application Filing
- 2009-01-14 EP EP09707238A patent/EP2238314B1/en not_active Not-in-force
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0258754A2 (en) * | 1986-09-03 | 1988-03-09 | Mtu Motoren- Und Turbinen-Union MàNchen Gmbh | Turbine blade with a cooling insert |
JPS6469702A (en) * | 1987-09-09 | 1989-03-15 | Hitachi Ltd | Fixation of movable blade of axial flow rotary machine |
FR2715968A1 (en) * | 1994-02-10 | 1995-08-11 | Snecma | Separating platform, fitting between blades on rotor |
WO2002066844A1 (en) * | 2001-02-23 | 2002-08-29 | Siemens Aktiengesellschaft | Assembling element for connecting two objects, especially two device parts |
DE102004030965A1 (en) * | 2004-06-26 | 2006-02-09 | Fag Kugelfischer Ag & Co. Ohg | Locking washer for fastening nut on threaded shaft has lugs around its inner circumference mounted on joints made from shape memory alloy which swivel to hold nut more securely when temperature rises |
WO2007028703A1 (en) | 2005-09-07 | 2007-03-15 | Siemens Aktiengesellschaft | Arrangement for axially securing rotating blades in a rotor and use |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2372095A1 (en) * | 2010-03-26 | 2011-10-05 | Siemens Aktiengesellschaft | Method and device for fixing a blade to a rotor using a memory shape element |
CN112302766A (en) * | 2020-10-15 | 2021-02-02 | 绍兴宾果科技有限公司 | Three-way catalytic robot with tail gas energy recovery function |
CN112302766B (en) * | 2020-10-15 | 2022-02-25 | 羽源洋(宁波)科技有限公司 | Three-way catalytic device with tail gas energy recovery function |
Also Published As
Publication number | Publication date |
---|---|
US20110020125A1 (en) | 2011-01-27 |
EP2238314A1 (en) | 2010-10-13 |
CN101939509B (en) | 2013-12-11 |
WO2009098111A1 (en) | 2009-08-13 |
US8535012B2 (en) | 2013-09-17 |
JP2011514467A (en) | 2011-05-06 |
EP2238314B1 (en) | 2012-05-23 |
JP5002063B2 (en) | 2012-08-15 |
CN101939509A (en) | 2011-01-05 |
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