EP3172409B1 - Wheel disk assembly having sealing plates - Google Patents

Wheel disk assembly having sealing plates Download PDF

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Publication number
EP3172409B1
EP3172409B1 EP15778938.9A EP15778938A EP3172409B1 EP 3172409 B1 EP3172409 B1 EP 3172409B1 EP 15778938 A EP15778938 A EP 15778938A EP 3172409 B1 EP3172409 B1 EP 3172409B1
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EP
European Patent Office
Prior art keywords
wheel disk
sealing plates
bore
disk assembly
bolts
Prior art date
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EP15778938.9A
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German (de)
French (fr)
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EP3172409A1 (en
Inventor
Kevin KAMPKA
Christian Kowalzik
Peter Schröder
Vyacheslav Veitsman
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.)
Siemens Energy Global GmbH and Co KG
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Siemens Energy Global GmbH and Co KG
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Publication of EP3172409A1 publication Critical patent/EP3172409A1/en
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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
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/3007—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type
    • F01D5/3015—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type with side plates
    • 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
    • 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
    • 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
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/60—Assembly methods
    • F05D2230/64—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins
    • 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
    • F05D2260/37—Retaining components in desired mutual position by a press fit connection

Definitions

  • the present invention relates to a wheel disk arrangement with a wheel disk, a plurality of vane devices which are fastened along an outer circumference of the wheel disk, a number of sealing plates which are received between the wheel disk and the vane devices so as to be displaceable in the circumferential direction, and securing devices which are designed in such a way that they enclose the sealing plates Secure against displacement in the circumferential direction, bolts being provided as securing devices, which are held releasably in bores arranged in the wheel disk and engage in recesses formed on the surfaces of the sealing plates facing the wheel disk.
  • Wheel disk assemblies of the type mentioned are known in the prior art. They form components of rotors such as gas turbines or the like. Normally, several sealing plates are accommodated between the wheel disk and the blade devices so as to be displaceable in the circumferential direction. For example, the sealing plates can be inserted into annular grooves which are arranged radially spaced from one another and which are formed on the wheel disk on the one hand and on the blade devices on the other. In order to ensure proper functioning of the sealing plates, it is necessary to secure the individual sealing plates against displacement in the circumferential direction, for which purpose appropriate safety devices are used.
  • Such a securing device can be formed, for example, by a screw extending through a through hole provided in the sealing plate and a threaded hole provided on the wheel disc, into which the screw is screwed in the properly installed state.
  • a securing device designed in this way is, however, that the notch effect associated with the threaded hole provided in the wheel disc has a negative effect on the strength affect the wheel disc and cause problems accordingly.
  • screws can often no longer be loosened, which entails laborious drilling out of the screw connection, as a result of which the expensive wheel disc is damaged.
  • the U.S. 3,070,351 a retaining ring for rotor blades of a compressor that are seated in axial grooves.
  • Clamping sleeves are provided to fasten the retaining ring to the paddle wheel.
  • the adapter sleeves sit in aligned bores that are provided on the one hand in the paddle wheel and on the other hand in the locking ring. The seat of the clamping sleeves is no longer secured, so that the clamping sleeves can be lost.
  • the present invention creates a wheel disk arrangement of the type mentioned at the outset, wherein the relevant bolts can resiliently be plunged further into the bore for manual release of the engagement of the respective bolt from the associated recess. Due to the fact that the bolts of the securing devices according to the invention, in contrast to the prior art described at the beginning, are not screwed to the wheel disc but are only inserted into bores of the wheel disk and can be resiliently plunged further into the bore to release the engagement, a self-locking bolt can thus be provided that does not have to be secured against loss by another component.
  • the sealing plate in which the bolt engages therefore also serves as a means against loss of the bolt.
  • a simple and reliable wheel disk arrangement is thus specified, which also allows particularly simple and quick assembly, such as disassembly of the sealing plates and bolts.
  • the at least one bolt has at its end region facing the wheel disk at least one radially outwardly projecting projection as a contact for an associated sealing plate. In this way, a secure and correct positioning of the sealing plates is ensured while maintaining a defined distance between the wheel disc and the sealing plates.
  • the bolts are designed in such a way that, in their final assembly position, they press resiliently against the surfaces of the sealing plates facing the wheel disk in a supporting manner on the bottom of the hole. This ensures that the bolt is seated in the recess of the sealing plate without play and therefore with little wear.
  • the bore can preferably be designed without threads, so that the strength of the wheel disc is not reduced by the notch effect of threads.
  • the bore has a substantially hemispherical bore bottom. Accordingly, there is a transition radius between the hole and the bottom of the hole, which also prevents unnecessary weakening of the wheel disc.
  • the bolts preferably have at least one, preferably two spring legs, which engage in the associated bore. Thanks to this one-piece structure, the bolts can be easily and repeatedly assembled and disassembled. According to this preferred embodiment, a separate spring is not required, which simplifies assembly.
  • the spring legs are advantageously arranged opposite one another, whereby uniformly acting clamping forces are achieved.
  • the at least one projection is advantageously designed in the shape of a ring, which is particularly advantageous with regard to the manufacture of the bolt.
  • the recesses formed on the sealing plates are designed as through holes. On the one hand, this is advantageous from a manufacturing point of view. On the other hand, the bolts can be inserted more easily into the associated recesses, since they are visible from the outside through the through holes.
  • the recesses formed on the sealing plates are advantageously designed as radially extending elongated holes in order to be able to compensate for thermal expansions during the intended use of the wheel disk arrangement.
  • the Figures 1 to 5 show a wheel disk arrangement 1 according to an embodiment of the present invention or components thereof.
  • the wheel disk arrangement 1 comprises a wheel disk 2, a plurality of vane devices 3 which are fastened along an outer circumference of the wheel disk 2, and a number of sealing plates 4 which extend between the wheel disk 2 and the vane devices 3 and are accommodated so as to be displaceable in the circumferential direction U. More precisely, the sealing plates 4 are inserted into annular grooves which are arranged at a distance from one another in the radial direction R, the annular grooves being formed on the wheel disk 2 on the one hand and on the blade devices 3 on the other.
  • the wheel disk arrangement 1 comprises several safety devices 5, in this case one safety device 5 per sealing plate 4.
  • Each safety device 5 has a bolt 6 which is fastened to the wheel disk 2 and which is inserted into a recess 7 engages, which is formed on the surface of each sealing plate 4 facing the wheel disk 2.
  • the bolts 6 are held in a releasable clamping manner in thread-free bores 8 of the wheel disk 2, each bore 8 having a substantially hemispherical bore bottom.
  • the bolts 6 At their end region facing the wheel disk 2, the bolts 6 have two oppositely arranged spring legs 9 which, in the properly installed state, rest against the wall of the bore 8 while exerting a clamping force, as shown in FIG Figure 2 is shown.
  • the bolts 8 At their end area facing away from the wheel disk 2, the bolts 8 have a radially outwardly projecting projection 10 which in the present case is annular and serves as a contact for an associated sealing plate 4. At the same time, the projection 10 acts as a spacer and defines a predetermined distance between the wheel disc 2 and the corresponding one Sealing plate 4.
  • the recesses 7 formed on the sealing plates 4 are provided as through holes, more precisely as continuous and radially extending elongated holes, so that the bolts 6 remain free of movement in the radial direction R, in particular in the radial outward direction.
  • the wheel disk arrangement 1 is characterized in particular by the fact that the bolts 6, thanks to the spring legs 9, can be easily and repeatedly assembled and disassembled. While during assembly the bolt 6 is first immersed so deeply into the bore that a sealing plate can then be moved past its end area, the bolt 6 must also be immersed in the bore 8 for dismantling in order to engage the bolt 6 with the recess 7 to solve and thus enable a displacement of the sealing plate in the circumferential direction.
  • the spring action of the bolt 6 is directed so that the bolt at least partially moves out of its bore as soon as it is released.
  • the bore 8 is designed to be thread-free, so that the strength of the wheel disc 2 is not unnecessarily impaired by the notch effect.
  • the essentially hemispherical hole bottom is also beneficial to the strength. Thanks to the projection 10, a defined position of the sealing plates 4 is guaranteed in the properly installed state.
  • the design of the recesses 7 as radially extending and continuous elongated holes, which leave the bolt 6 a free movement in the radial direction, enables a compensation of thermal expansions of the sealing plates 4 during the intended operation of the wheel disk arrangement 1.

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

Description

Die vorliegende Erfindung betrifft eine Radscheibenanordnung mit einer Radscheibe, mehreren Schaufeleinrichtungen, die entlang eines Außenumfangs der Radscheibe befestigt sind, mehreren Dichtblechen, die zwischen der Radscheibe und den Schaufeleinrichtungen in Umfangsrichtung verschiebbar aufgenommen sind, und Sicherungseinrichtungen, die derart ausgebildet sind, dass sie die Dichtbleche gegen eine Verschiebung in Umfangsrichtung sichern, wobei als Sicherungseinrichtungen Bolzen vorgesehen sind, die in in der Radscheibe angeordneten Bohrungen lösbar gehalten sind und in Ausnehmungen eingreifen, die an den der Radscheibe zugewandten Flächen der Dichtbleche ausgebildet sind.The present invention relates to a wheel disk arrangement with a wheel disk, a plurality of vane devices which are fastened along an outer circumference of the wheel disk, a number of sealing plates which are received between the wheel disk and the vane devices so as to be displaceable in the circumferential direction, and securing devices which are designed in such a way that they enclose the sealing plates Secure against displacement in the circumferential direction, bolts being provided as securing devices, which are held releasably in bores arranged in the wheel disk and engage in recesses formed on the surfaces of the sealing plates facing the wheel disk.

Radscheibenanordnungen der eingangs genannten Art sind im Stand der Technik bekannt. Sie bilden Komponenten von Rotoren, wie beispielsweise Gasturbinen oder dergleichen. Normalerweise sind zwischen der Radscheibe und den Schaufeleinrichtungen mehrere Dichtbleche in Umfangsrichtung verschiebbar aufgenommen. So können die Dichtbleche beispielsweise in radial voneinander beabstandet angeordnete Ringnuten eingesetzt sein, die an der Radscheibe einerseits und an den Schaufeleinrichtungen andererseits ausgebildet sind. Um eine ordnungsgemäße Funktion der Dichtbleche zu gewährleisten, ist es erforderlich, die einzelnen Dichtbleche gegen eine Verschiebung in Umfangsrichtung zu sichern, wozu entsprechende Sicherungseinrichtungen verwendet werden. Eine solche Sicherungseinrichtung kann beispielsweise durch eine sich durch ein im Dichtblech vorgesehenes Durchgangsloch erstreckende Schraube und eine an der Radscheibe vorgesehene Gewindebohrung gebildet sein, in welche die Schraube im bestimmungsgemäß montierten Zustand geschraubt ist. Ein Problem einer derart ausgebildeten Sicherungseinrichtung besteht allerdings darin, dass sich die mit der in der Radscheibe vorgesehenen Gewindebohrung einhergehende Kerbwirkung negativ auf die Festigkeit der Radscheibe auswirken und entsprechend Probleme bereiten kann. Darüber hinaus lassen sich Schrauben im Zweifelsfall häufig nicht mehr lösen, was ein aufwändiges Aufbohren der Schraubverbindung nach sich zieht, wodurch die teure Radscheibe beschädigt wird.Wheel disk assemblies of the type mentioned are known in the prior art. They form components of rotors such as gas turbines or the like. Normally, several sealing plates are accommodated between the wheel disk and the blade devices so as to be displaceable in the circumferential direction. For example, the sealing plates can be inserted into annular grooves which are arranged radially spaced from one another and which are formed on the wheel disk on the one hand and on the blade devices on the other. In order to ensure proper functioning of the sealing plates, it is necessary to secure the individual sealing plates against displacement in the circumferential direction, for which purpose appropriate safety devices are used. Such a securing device can be formed, for example, by a screw extending through a through hole provided in the sealing plate and a threaded hole provided on the wheel disc, into which the screw is screwed in the properly installed state. One problem with a securing device designed in this way is, however, that the notch effect associated with the threaded hole provided in the wheel disc has a negative effect on the strength affect the wheel disc and cause problems accordingly. In addition, if in doubt, screws can often no longer be loosened, which entails laborious drilling out of the screw connection, as a result of which the expensive wheel disc is damaged.

So offenbart beispielsweise die US 3,070,351 einen Sicherungsrings für in Axialnuten sitzende Laufschaufeln eines Verdichters. Zur Befestigung des Sicherungsrings am Schaufelrad sind Spannhülsen vorgesehen. Die Spannhülsen sitzen in fluchtenden Bohrungen, die einerseits im Schaufelrad und andererseits im Sicherungsring vorgesehen sind. Der Sitz der Spannhülsen ist aber nicht weiter gesichert, so dass ein Verlust der Spannhülsen möglich ist.For example, the U.S. 3,070,351 a retaining ring for rotor blades of a compressor that are seated in axial grooves. Clamping sleeves are provided to fasten the retaining ring to the paddle wheel. The adapter sleeves sit in aligned bores that are provided on the one hand in the paddle wheel and on the other hand in the locking ring. The seat of the clamping sleeves is no longer secured, so that the clamping sleeves can be lost.

Ausgehend von diesem Stand der Technik ist es eine Aufgabe der vorliegenden Erfindung, eine Radscheibenanordnung der eingangs genannten Art mit alternativem Aufbau zu schaffen.Based on this prior art, it is an object of the present invention to create a wheel disk arrangement of the type mentioned at the beginning with an alternative structure.

Zur Lösung dieser Aufgabe schafft die vorliegende Erfindung eine Radscheibenanordnung der eingangs genannten Art, wobei zum manuellen Lösen des Eingriffs des jeweiligen Bolzens aus der zugehörigen Ausnehmung die betreffenden Bolzen federnd in die Bohrung weiter eintauchbar sind. Aufgrund der Tatsache, dass die Bolzen der erfindungsgemäßen Sicherungseinrichtungen im Gegensatz zum eingangs beschriebenen Stand der Technik nicht mit der Radscheibe verschraubt sondern lediglich in Bohrungen der Radscheibe eingesetzt sind und zum Lösen des Eingriffs federnd in die Bohrung weiter eintauchbar ist, kann so ein selbstgesicherter Bolzen bereitgestellt werden, der nicht durch ein weiteres Bauteil gegen Verlust gesichert werden muss. Das Dichtblech, in welches der Bolzen eingreift, dient mithin gleichzeitig als Mittel gegen Verlust des Bolzens. Damit ist eine einfache sowie zuverlässige Radscheibenanordnung angegeben, die zudem eine besonders einfache und schnelle Montage wie Demontage der Dichtbleche und Bolzen erlaubt.In order to achieve this object, the present invention creates a wheel disk arrangement of the type mentioned at the outset, wherein the relevant bolts can resiliently be plunged further into the bore for manual release of the engagement of the respective bolt from the associated recess. Due to the fact that the bolts of the securing devices according to the invention, in contrast to the prior art described at the beginning, are not screwed to the wheel disc but are only inserted into bores of the wheel disk and can be resiliently plunged further into the bore to release the engagement, a self-locking bolt can thus be provided that does not have to be secured against loss by another component. The sealing plate in which the bolt engages therefore also serves as a means against loss of the bolt. A simple and reliable wheel disk arrangement is thus specified, which also allows particularly simple and quick assembly, such as disassembly of the sealing plates and bolts.

Erfindungsgemäß weist der zumindest eine Bolzen an seinem der Radscheibe zugewandten Endbereich zumindest einen radial auswärts vorstehenden Vorsprung als Anlage für ein zugeordnetes Dichtblech auf. Auf diese Weise wird eine sichere und ordnungsgemäße Positionierung der Dichtbleche unter Beibehaltung eines definierten Abstandes zwischen der Radscheibe und den Dichtblechen gewährleistet.According to the invention, the at least one bolt has at its end region facing the wheel disk at least one radially outwardly projecting projection as a contact for an associated sealing plate. In this way, a secure and correct positioning of the sealing plates is ensured while maintaining a defined distance between the wheel disc and the sealing plates.

Gemäß einer ersten Ausgestaltung sind die Bolzen derart ausgestaltet, dass sie in ihrer endgültigen Montage-Position sich am Bohrungsgrund abstützend federnd an die der Radscheibe zugewandten Flächen der Dichtbleche anpressen. Damit wird ein spielfreier und somit verschleißarmer Sitz des Bolzens in der Ausnehmung des Dichtblechs gewährleistet.According to a first embodiment, the bolts are designed in such a way that, in their final assembly position, they press resiliently against the surfaces of the sealing plates facing the wheel disk in a supporting manner on the bottom of the hole. This ensures that the bolt is seated in the recess of the sealing plate without play and therefore with little wear.

Vorzugsweise kann die Bohrung gewindefrei ausgestalt sein, so dass die Festigkeit der Radscheibe durch die Kerbwirkung von Gewinden nicht herabgesetzt wird.The bore can preferably be designed without threads, so that the strength of the wheel disc is not reduced by the notch effect of threads.

Gemäß einer Ausgestaltung der vorliegenden Erfindung weist die Bohrung einen im Wesentlichen halbkugelförmig ausgebildeten Bohrungsgrund auf. Entsprechend ist zwischen Bohrung und Bohrungsgrund ein Übergangsradius vorhanden, was ebenfalls eine unnötige Schwächung der Radscheibe verhindert.According to one embodiment of the present invention, the bore has a substantially hemispherical bore bottom. Accordingly, there is a transition radius between the hole and the bottom of the hole, which also prevents unnecessary weakening of the wheel disc.

Bevorzugt weisen die Bolzen an ihrem der Radscheibe zugewandten Endbereich zumindest einen, vorzugsweise zwei Federschenkel auf, die in die zugeordnete Bohrung greifen. Dank dieses einstückigen Aufbaus lassen sich die Bolzen einfach und wiederholt montieren und demontieren. Eine separate Feder ist gemäß dieser bevorzugten Ausgestaltung nicht erforderlich, was die Montage vereinfacht.At their end region facing the wheel disk, the bolts preferably have at least one, preferably two spring legs, which engage in the associated bore. Thanks to this one-piece structure, the bolts can be easily and repeatedly assembled and disassembled. According to this preferred embodiment, a separate spring is not required, which simplifies assembly.

Die Federschenkel sind vorteilhaft einander gegenüber angeordnet, wodurch gleichmäßig wirkende Klemmkräfte erzielt werden.The spring legs are advantageously arranged opposite one another, whereby uniformly acting clamping forces are achieved.

Der zumindest eine Vorsprung ist vorteilhaft ringförmig ausgebildet, was insbesondere in Bezug auf die Fertigung des Bolzens von Vorteil ist.The at least one projection is advantageously designed in the shape of a ring, which is particularly advantageous with regard to the manufacture of the bolt.

Gemäß einer Ausgestaltung der vorliegenden Erfindung sind die an den Dichtblechen ausgebildeten Ausnehmungen als Durchgangslöcher ausgebildet. Dies ist zum einen aus fertigungstechnischer Sicht von Vorteil. Zum anderen lassen sich die Bolzen einfacher in die zugeordneten Ausnehmungen einführen, da sie durch die Durchgangslöcher von außen sichtbar sind.According to one embodiment of the present invention, the recesses formed on the sealing plates are designed as through holes. On the one hand, this is advantageous from a manufacturing point of view. On the other hand, the bolts can be inserted more easily into the associated recesses, since they are visible from the outside through the through holes.

Vorteilhaft sind die an den Dichtblechen ausgebildeten Ausnehmungen als sich radial erstreckende Langlöcher ausgebildet, um während des bestimmungsgemäßen Einsatzes der Radscheibenanordnung Wärmedehnungen kompensieren zu können.The recesses formed on the sealing plates are advantageously designed as radially extending elongated holes in order to be able to compensate for thermal expansions during the intended use of the wheel disk arrangement.

Weitere Merkmale und Vorteile der vorliegenden Erfindung werden anhand der nachfolgenden Beschreibung einer Radscheibe gemäß einer Ausführungsform der vorliegenden Erfindung unter Bezugnahme auf die beiliegende Zeichnung deutlich. Darin ist

Figur 1
eine schematische perspektivische Ansicht einer Radscheibenanordnung gemäß einer Ausführungsform der vorliegenden Erfindung;
Figur 2
eine schematische Schnittansicht, die eine Sicherungseinrichtung der in Figur 1 dargestellten Radscheibenanordnung zeigt;
Figur 3
eine schematische perspektivische Ansicht eines Dichtbleches der in Figur 1 dargestellten Radscheibenanordnung;
Figur 4
eine vergrößerte Ansicht einer in dem in Figur 3 dargestellten Dichtblech ausgebildeten Ausnehmung; und
Figur 5
eine schematische perspektivische Ansicht eines Bolzens der in Figur 2 dargestellten Sicherungseinrichtung.
Further features and advantages of the present invention will become clear on the basis of the following description of a wheel disc according to an embodiment of the present invention with reference to the accompanying drawings. In it is
Figure 1
a schematic perspective view of a wheel disk assembly according to an embodiment of the present invention;
Figure 2
a schematic sectional view showing a safety device of the in Figure 1 shows wheel disc assembly illustrated;
Figure 3
a schematic perspective view of a sealing plate in FIG Figure 1 wheel disc assembly shown;
Figure 4
an enlarged view of one in the in Figure 3 illustrated sealing plate formed recess; and
Figure 5
a schematic perspective view of a bolt of FIG Figure 2 security device shown.

Die Figuren 1 bis 5 zeigen eine Radscheibenanordnung 1 gemäß einer Ausführungsform der vorliegenden Erfindung bzw. Komponenten derselben. Die Radscheibenanordnung 1 umfasst eine Radscheibe 2, mehrere Schaufeleinrichtungen 3, die entlang eines Außenumfangs der Radscheibe 2 befestigt sind, und mehrere Dichtbleche 4, die sich zwischen der Radscheibe 2 und den Schaufeleinrichtungen 3 erstrecken und in Umfangsrichtung U verschiebbar aufgenommen sind. Genauer gesagt sind die Dichtbleche 4 in Ringnuten eingesetzt, die in radialer Richtung R voneinander beabstandet angeordnet sind, wobei die Ringnuten an der Radscheibe 2 einerseits und an den Schaufeleinrichtungen 3 andererseits ausgebildet sind.The Figures 1 to 5 show a wheel disk arrangement 1 according to an embodiment of the present invention or components thereof. The wheel disk arrangement 1 comprises a wheel disk 2, a plurality of vane devices 3 which are fastened along an outer circumference of the wheel disk 2, and a number of sealing plates 4 which extend between the wheel disk 2 and the vane devices 3 and are accommodated so as to be displaceable in the circumferential direction U. More precisely, the sealing plates 4 are inserted into annular grooves which are arranged at a distance from one another in the radial direction R, the annular grooves being formed on the wheel disk 2 on the one hand and on the blade devices 3 on the other.

Um die Dichtbleche 4 gegen eine Verschiebung in Umfangsrichtung U zu sichern, umfasst die Radscheibenanordnung 1 mehrere Sicherungseinrichtungen 5, vorliegend eine Sicherungseinrichtung 5 pro Dichtblech 4. Jede Sicherungseinrichtung 5 weist einen Bolzen 6 auf, der an der Radscheibe 2 befestigt ist und in eine Ausnehmung 7 greift, die an der der Radscheibe 2 zugewandten Fläche eines jeden Dichtblechs 4 ausgebildet ist. Die Bolzen 6 sind lösbar klemmend in gewindefreien Bohrungen 8 der Radscheibe 2 gehalten, wobei jede Bohrung 8 einen im Wesentlichen halbkugelförmig ausgebildeten Bohrungsgrund aufweist. Die Bolzen 6 weisen an ihrem der Radscheibe 2 zugewandten Endbereich zwei einander gegenüberliegend angeordnete Federschenkel 9 auf, die im bestimmungsgemäß montierten Zustand unter Ausübung einer Klemmkraft an der Wandung der Bohrung 8 anliegen, wie es in Figur 2 dargestellt ist. An ihrem der Radscheibe 2 abgewandten Endbereich weisen die Bolzen 8 einen radial auswärts vorstehenden Vorsprung 10 auf, der vorliegend ringförmig ausgebildet ist und als Anlage für ein zugeordnetes Dichtblech 4 dient. Gleichzeitig wirkt der Vorsprung 10 als Abstandshalter und definiert einen vorbestimmten Abstand zwischen der Radscheibe 2 und dem entsprechenden Dichtblech 4. Die an den Dichtblechen 4 ausgebildeten Ausnehmungen 7 sind als Durchgangslöcher vorgesehen, genauer gesagt als durchgehende und sich radial erstreckende Langlöcher, so dass den Bolzen 6 in radialer Richtung R ein Bewegungsspiel verbleibt, insbesondere in radialer Auswärtsrichtung.In order to secure the sealing plates 4 against displacement in the circumferential direction U, the wheel disk arrangement 1 comprises several safety devices 5, in this case one safety device 5 per sealing plate 4. Each safety device 5 has a bolt 6 which is fastened to the wheel disk 2 and which is inserted into a recess 7 engages, which is formed on the surface of each sealing plate 4 facing the wheel disk 2. The bolts 6 are held in a releasable clamping manner in thread-free bores 8 of the wheel disk 2, each bore 8 having a substantially hemispherical bore bottom. At their end region facing the wheel disk 2, the bolts 6 have two oppositely arranged spring legs 9 which, in the properly installed state, rest against the wall of the bore 8 while exerting a clamping force, as shown in FIG Figure 2 is shown. At their end area facing away from the wheel disk 2, the bolts 8 have a radially outwardly projecting projection 10 which in the present case is annular and serves as a contact for an associated sealing plate 4. At the same time, the projection 10 acts as a spacer and defines a predetermined distance between the wheel disc 2 and the corresponding one Sealing plate 4. The recesses 7 formed on the sealing plates 4 are provided as through holes, more precisely as continuous and radially extending elongated holes, so that the bolts 6 remain free of movement in the radial direction R, in particular in the radial outward direction.

Die erfindungsgemäße Radscheibenanordnung 1 zeichnet sich insbesondere dadurch aus, dass die Bolzen 6 dank der Federschenkel 9 in einfacher Weise und wiederholt montiert sowie demontiert werden können. Während bei der Montage zuerst der Bolzen 6 derart tief in die Bohrung eingetaucht wird, dass anschließend ein Dichtblech an seinem Endbereich vorbeibewegt werden kann, so ist zur Demontage der Bolzen 6 ebenso in die Bohrung 8 einzutauchen, um den Eingriff des Bolzens 6 mit der Ausnehmung 7 zu lösen und so eine Verschiebung des Dichtblechs in Umfangsrichtung zu ermöglich. Die Federwirkung des Bolzens 6 ist dabei so gerichtet, dass der Bolzen sich aus seiner Bohrung zumindest teilweise heraus bewegt, sobald dieser freigegeben ist.The wheel disk arrangement 1 according to the invention is characterized in particular by the fact that the bolts 6, thanks to the spring legs 9, can be easily and repeatedly assembled and disassembled. While during assembly the bolt 6 is first immersed so deeply into the bore that a sealing plate can then be moved past its end area, the bolt 6 must also be immersed in the bore 8 for dismantling in order to engage the bolt 6 with the recess 7 to solve and thus enable a displacement of the sealing plate in the circumferential direction. The spring action of the bolt 6 is directed so that the bolt at least partially moves out of its bore as soon as it is released.

Ein weiterer Vorteil besteht darin, dass die Bohrung 8 gewindefrei ausgebildet ist, so dass die Festigkeit der Radscheibe 2 nicht unnötig durch Kerbwirkung beeinträchtigt wird. Auch ist der im Wesentlichen halbkugelförmig ausgebildete Bohrungsgrund der Festigkeit zuträglich. Dank des Vorsprungs 10 ist eine definierte Lage der Dichtbleche 4 im bestimmungsgemäß montierten Zustand gewährleistet. Die Ausbildung der Ausnehmungen 7 als sich radial erstreckende und durchgehende Langlöcher, die den Bolzen 6 in radialer Richtung ein Bewegungsspiel belassen, ermöglicht eine Kompensation von Wärmedehnungen der Dichtbleche 4 während des bestimmungsgemäßen Betriebes der Radscheibenanordnung 1.Another advantage is that the bore 8 is designed to be thread-free, so that the strength of the wheel disc 2 is not unnecessarily impaired by the notch effect. The essentially hemispherical hole bottom is also beneficial to the strength. Thanks to the projection 10, a defined position of the sealing plates 4 is guaranteed in the properly installed state. The design of the recesses 7 as radially extending and continuous elongated holes, which leave the bolt 6 a free movement in the radial direction, enables a compensation of thermal expansions of the sealing plates 4 during the intended operation of the wheel disk arrangement 1.

Obwohl die Erfindung im Detail durch das bevorzugte Ausführungsbeispiel näher illustriert und beschrieben wurde, so ist die Erfindung nicht durch die offenbarten Beispiele eingeschränkt und andere Variationen können vom Fachmann hieraus abgeleitet werden, ohne den Schutzumfang der Erfindung zu verlassen.Although the invention has been illustrated and described in more detail by the preferred exemplary embodiment, the invention is not restricted by the disclosed examples and other variations can be made therefrom by the person skilled in the art can be derived without departing from the scope of the invention.

Claims (9)

  1. Wheel disk assembly (1), having a wheel disk (2) and having a plurality of blade devices (3), which (3) are fastened along an outer circumference of the wheel disk (2), and having a plurality of sealing plates (4), which (4) are received between the wheel disk (2) and the blade devices (3) such that they can be displaced in the circumferential direction, and having securing devices (5) which (5) secure the sealing plates (4) against displacement in the circumferential direction (U), wherein bolts (6) are provided as securing devices, which bolts (6) are releasably held in bores (8) arranged on the wheel disk (2) and engage in cutouts (7) which (7) are formed in faces of the sealing plates (4) oriented toward the wheel disk (2), wherein at least one of the bolts (6), in order to release the engagement from the associated cutout (7), can be resiliently pressed further into the bore (8),
    characterized in that
    the bolt (6) has, at its end region oriented away from the wheel disk (2), at least one radially outwardly protruding projection (10) as a bearing surface for an associated sealing plate (4).
  2. Wheel disk assembly (1) according to Claim 1,
    characterized in that
    all of the bolts, in order to release the engagement from the associated cutout (7), can be resiliently pressed further into the bore (8), wherein the bolts (6) have, at their end region oriented away from the wheel disk (2), at least one radially outwardly protruding projection (10) as a bearing surface for an associated sealing plate (4).
  3. Wheel disk assembly (1) according to Claim 1 or 2,
    characterized in that
    the bolt (6), braced against the base of the bore, presses against the faces of the sealing plates (4) oriented toward the wheel disk (2).
  4. Wheel disk assembly (1) according to one of Claims 1 to 3,
    characterized in that
    the bore (8) has an essentially hemispherical bore base, and/or is untapped.
  5. Wheel disk assembly (1) according to one of Claims 1 to 4,
    characterized in that
    the bolt (6) has, at its end region oriented toward the wheel disk (2), at least one spring leg (9) engaging in the associated bore (8).
  6. Wheel disk assembly (1) according to Claim 5,
    characterized in that
    two spring legs (9) are arranged opposite one another.
  7. Wheel disk assembly (1) according to one of Claims 1 to 6,
    characterized in that
    the at least one projection (10) is annular.
  8. Wheel disk assembly (1) according to one of Claims 1 to 7,
    characterized in that
    the cutouts (7) formed in the sealing plates (4) are formed as through-holes.
  9. Wheel disk assembly (1) according to one of Claims 1 to 7,
    characterized in that
    the cutouts (7) formed in the sealing plates (4) are formed as radially extending elongate slots.
EP15778938.9A 2014-10-30 2015-10-12 Wheel disk assembly having sealing plates Active EP3172409B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14191066.1A EP3015655A1 (en) 2014-10-30 2014-10-30 Wheel disc assembly with seal plates
PCT/EP2015/073548 WO2016066412A1 (en) 2014-10-30 2015-10-12 Wheel disk assembly having sealing plates

Publications (2)

Publication Number Publication Date
EP3172409A1 EP3172409A1 (en) 2017-05-31
EP3172409B1 true EP3172409B1 (en) 2021-02-17

Family

ID=51845311

Family Applications (2)

Application Number Title Priority Date Filing Date
EP14191066.1A Withdrawn EP3015655A1 (en) 2014-10-30 2014-10-30 Wheel disc assembly with seal plates
EP15778938.9A Active EP3172409B1 (en) 2014-10-30 2015-10-12 Wheel disk assembly having sealing plates

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP14191066.1A Withdrawn EP3015655A1 (en) 2014-10-30 2014-10-30 Wheel disc assembly with seal plates

Country Status (4)

Country Link
US (1) US10337338B2 (en)
EP (2) EP3015655A1 (en)
CN (1) CN208594970U (en)
WO (1) WO2016066412A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2975219A1 (en) * 2014-07-17 2016-01-20 Siemens Aktiengesellschaft Wheel disc assembly
DE102020200073A1 (en) * 2020-01-07 2021-07-08 Siemens Aktiengesellschaft Guide vane ring

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3070351A (en) * 1959-02-06 1962-12-25 Gen Motors Corp Blade retention
US8206119B2 (en) * 2009-02-05 2012-06-26 General Electric Company Turbine coverplate systems
EP2702279B1 (en) * 2011-04-27 2016-04-06 Illinois Tool Works Inc. Reusable press-in retainer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN208594970U (en) 2019-03-12
WO2016066412A1 (en) 2016-05-06
EP3015655A1 (en) 2016-05-04
US20170241276A1 (en) 2017-08-24
US10337338B2 (en) 2019-07-02
EP3172409A1 (en) 2017-05-31

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