EP2719867A1 - Housing structure with improved sealing and cooling - Google Patents

Housing structure with improved sealing and cooling Download PDF

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Publication number
EP2719867A1
EP2719867A1 EP12188313.6A EP12188313A EP2719867A1 EP 2719867 A1 EP2719867 A1 EP 2719867A1 EP 12188313 A EP12188313 A EP 12188313A EP 2719867 A1 EP2719867 A1 EP 2719867A1
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EP
European Patent Office
Prior art keywords
housing wall
housing structure
structure according
web
heat shield
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP12188313.6A
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German (de)
French (fr)
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EP2719867B1 (en
Inventor
Manfred Feldmann
Janine Dr. Sangl
Sebastian Kaltenbach
Joachim Lorenz
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MTU Aero Engines AG
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MTU Aero Engines AG
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Publication date
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Priority to EP12188313.6A priority Critical patent/EP2719867B1/en
Priority to ES12188313.6T priority patent/ES2531468T3/en
Priority to US14/052,338 priority patent/US9416672B2/en
Publication of EP2719867A1 publication Critical patent/EP2719867A1/en
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Publication of EP2719867B1 publication Critical patent/EP2719867B1/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
    • F01D9/00—Stators
    • F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
    • F01D9/023—Transition ducts between combustor cans and first stage of the turbine in gas-turbine engines; their cooling or sealings
    • 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
    • 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
    • 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
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
    • F01D25/243—Flange connections; Bolting arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/10—Stators
    • F05D2240/15—Heat shield

Definitions

  • the present invention relates to a housing structure for a turbomachine, in particular for a gas turbine or an aircraft engine.
  • turbomachines such as gas turbines or aircraft engines
  • air is drawn along a flow channel, compressed, and combusted in a combustion chamber along with fuel, and then the combustion gases are discharged through the flow channel, thereby driving in a turbine rotors.
  • the flow channel is circumferentially surrounded by a housing structure, wherein in the region of the combustion chamber and the following turbine, by the combustion gases very high temperatures prevail in the flow channel, so that surrounding the flow channel housing structure must be efficiently cooled in order to achieve that the lowest possible operating temperatures are present in order to use materials with lower requirements for high-temperature properties.
  • cooling air is passed into the area of the outer housing structure in order to bring about heat dissipation.
  • insulators and heat shields are used in such housing structures to protect the outer components from excessive temperatures.
  • the invention is based on the recognition that the existing in the prior art recesses in the field of heat shields or generally the presence of openings in the region of bushings in the radial direction causes inadmissible amount of hot gas can flow into the outer region of the housing structure.
  • the invention therefore provides for placing a seal in the region in which the heat shield is interrupted, so that hot gas is prevented from flowing in the direction of the outer housing structure.
  • it is proposed to be provided on webs or brackets which are arranged on an inner housing wall and at least partially in the radial direction outwardly, such as. to guide vane webs or Leitschaufelhalterept to provide broadening and form at these widening sealing surfaces against which heat shields sealingly so as to achieve a seal.
  • Broadening is here understood to mean an enlargement of the cross section of a web or a holder in at least one direction, which extends in particular in a direction transverse to the radial direction, whereby a new cross-sectional reduction is preferably provided in addition to the cross-sectional enlargement, so that the broadening only in a certain Section of the web or the bracket is present.
  • the broadening on a web or a holder of the inner housing wall may in particular be made in one piece, so that additional mounting components and additional assembly costs can be saved.
  • the broadening can be cast on a corresponding web or a holder.
  • At least one widening may be provided on a web circulating circumferentially about the flow channel or a corresponding support of the inner housing wall on opposite sides facing away from each other, on each of which a heat shield sealingly abuts, so that both in the axial direction as well as in the circumferential direction as closed as possible barrier wall of heat shields for the separation of an outer part of the housing structure is formed with outer cavities of an inner part of the housing structure with internal cavities.
  • the inner and outer cavities may have corresponding cooling air inlet openings to allow for inflow of cooling air.
  • the attached figure shows in a purely schematic way a partial sectional view of a housing structure according to the invention.
  • the attached figure shows a section of a housing structure according to the invention with an outer housing wall 1, which can be designed segmented both in the axial direction and circulate around the limited of its flow channel.
  • a guide blade 3 is arranged, which forms a part of the inner housing wall 2 in the form of a shroud.
  • a guide blade web 4 is arranged projecting obliquely outwards, which can serve for example for fixing the guide vane 3 to the outer housing wall 1.
  • heat shields are provided 6.7, which are also at least partially formed circumferentially around the flow channel and to shield the outer housing wall 1 from the temperatures in the flow channel.
  • the heat shields 6 and 7 limit in the embodiment shown both inner cavities 9, as well as outer cavities 10th
  • the outer cavities 10 are limited not only by the heat shields 6,7, but also by the outer housing wall 1 and the Leitschaufelsteg 4.
  • cooling air openings 11 are partially provided, which allow to direct air from the environment into the outer cavities 10 in order to provide a cooling effect for the housing with respect to the high temperatures in the flow channel.
  • the heat shields 6.7 continue to limit internal cavities 9, which are largely separated from the outer cavities 10 and sealed.
  • a sealing surface 8 is provided, which is in contact with the heat shield 7 and 6, respectively, to seal the inner cavities 8 and outer cavities 10.
  • the inner cavities 9 are spaced from the outer housing wall 1 and the outer cavities 10 are spaced from the inner housing wall 2, so that the inner cavities 9 serve as a temperature buffer, while the outer cavities 10 can be used to guide cooling air.
  • the outer housing wall 1 and the components in the region of the outer housing wall 1 can be effectively cooled and the temperature load can be lowered, so that materials can be used with lower requirements for temperature resistance.

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

Abstract

The housing structure comprises an outer housing wall (1) and an inner housing wall (2), which annularly enclose a flow channel of the turbo-engine, and are spaced apart relative to the flow channel. A heat shield (6,7) is arranged between the inner housing wall and the outer housing wall. A bar (4) partially protruding in radial direction or a holder partially projecting in radial direction are arranged on the inner housing wall. The bar or the holder comprises a broadening element (5) on one side, which has a sealing surface (8), against which the heat shield rests in a sealing manner.

Description

HINTERGRUND DER ERFINDUNGBACKGROUND OF THE INVENTION GEBIET DER ERFINDUNGFIELD OF THE INVENTION

Die vorliegende Erfindung betrifft eine Gehäusestruktur für eine Strömungsmaschine, insbesondere für eine Gasturbine oder ein Flugtriebwerk.The present invention relates to a housing structure for a turbomachine, in particular for a gas turbine or an aircraft engine.

STAND DER TECHNIKSTATE OF THE ART

Bei Strömungsmaschinen, wie Gasturbinen oder Flugtriebwerken, wird Luft entlang eines Strömungskanals angesaugt, verdichtet, und in einer Brennkammer zusammen mit Brennstoff verbrannt, wobei anschließend die Verbrennungsgase über den Strömungskanal ausgegeben werden, um dabei in einer Turbine Rotoren anzutreiben.In turbomachines, such as gas turbines or aircraft engines, air is drawn along a flow channel, compressed, and combusted in a combustion chamber along with fuel, and then the combustion gases are discharged through the flow channel, thereby driving in a turbine rotors.

Der Strömungskanal wird umlaufend von einer Gehäusestruktur umgeben, wobei insbesondere im Bereich der Brennkammer und der nachfolgenden Turbine, durch die Verbrennungsgase sehr hohe Temperaturen herrschen im Strömungskanal, sodass die den Strömungskanal umgebende Gehäusestruktur effizient gekühlt werden müssen, um zu erreichen, dass möglichst niedrige Betriebstemperaturen vorliegen, um so Werkstoffe mit geringeren Anforderungen an die Hochtemperatureigenschaften einsetzen zu können.The flow channel is circumferentially surrounded by a housing structure, wherein in the region of the combustion chamber and the following turbine, by the combustion gases very high temperatures prevail in the flow channel, so that surrounding the flow channel housing structure must be efficiently cooled in order to achieve that the lowest possible operating temperatures are present in order to use materials with lower requirements for high-temperature properties.

Hierzu wird Kühlluft in den Bereich der äußeren Gehäusestruktur geleitet, um eine Wärmeableitung zu bewirken. Zudem werden in derartigen Gehäusestrukturen Isolierungen und Hitzeschilde eingesetzt, die die äußeren Komponenten vor zu hohen Temperaturen schützen sollen.For this purpose, cooling air is passed into the area of the outer housing structure in order to bring about heat dissipation. In addition, insulators and heat shields are used in such housing structures to protect the outer components from excessive temperatures.

Allerdings gibt es bei bekannten Gehäusestrukturen oft die Notwendigkeit Aussparungen in den den Strömungskanal umgebenden Hitzeschilden vorzusehen, um beispielsweise Leitkranzstege bzw. Statoraufhängungen oder Umfangssicherungen in radialer Richtung durchzuführen. Durch die Aussparungen ist es jedoch möglich, dass Heißgas aus dem Strömungskanal nach außen gelangt, sodass die Temperaturbelastung der Komponenten in den äußeren Gehäusestrukturen ansteigt.However, in known housing structures there is often the need to provide recesses in the heat shields surrounding the flow channel in order, for example, to realize guide webs or stator suspensions or circumferential securing devices in the radial direction. However, the recesses may allow hot gas to flow out of the flow channel, increasing the temperature load on the components in the outer shell structures.

OFFENBARUNG DER ERFINDUNGDISCLOSURE OF THE INVENTION AUFGABE DER ERFINDUNGOBJECT OF THE INVENTION

Es ist deshalb Aufgabe der vorliegenden Erfindung, eine Gehäusestruktur bereitzustellen, die eine verbesserte Kühlung der äußeren Gehäusekomponenten ermöglicht und somit deren Temperaturbelastung senkt.It is therefore an object of the present invention to provide a housing structure that allows for improved cooling of the outer housing components and thus reduces their temperature load.

TECHNISCHE LÖSUNGTECHNICAL SOLUTION

Diese Aufgabe wird gelöst durch eine Gehäusestruktur mit den Merkmalen des Anspruchs 1 sowie einer Strömungsmaschine mit den Merkmalen des Anspruchs 10. Vorteilhafte Ausgestaltungen sind Gegenstand der abhängigen Ansprüche.This object is achieved by a housing structure with the features of claim 1 and a turbomachine with the features of claim 10. Advantageous embodiments are the subject of the dependent claims.

Die Erfindung geht aus von der Erkenntnis, dass die im Stand der Technik vorhandenen Aussparungen im Bereich der Hitzeschilde bzw. allgemein das Vorhandensein von Öffnungen im Bereich von Durchführungen in radialer Richtung dazu führt, dass unzulässig viel Heißgas in den äußeren Bereich der Gehäusestruktur strömen kann. Die Erfindung sieht deshalb vor, in dem Bereich, in dem das Hitzeschild unterbrochen ist, eine Abdichtung anzuordnen, sodass Heißgas am Strömen in Richtung der äußeren Gehäusestruktur gehindert wird. Hierzu wird vorgeschlagen, an Stegen oder Halterungen, die an einer inneren Gehäusewand angeordnet sind und zumindest teilweise in radialer Richtung nach außen vorstehe, wie z.B. an Leitschaufelstegen oder Leitschaufelhalterungen, Verbreiterungen vorzusehen und an diesen Verbreiterungen Dichtflächen auszubilden, an denen Hitzeschilde dichtend anliegen, um so eine Abdichtung zu erzielen.The invention is based on the recognition that the existing in the prior art recesses in the field of heat shields or generally the presence of openings in the region of bushings in the radial direction causes inadmissible amount of hot gas can flow into the outer region of the housing structure. The invention therefore provides for placing a seal in the region in which the heat shield is interrupted, so that hot gas is prevented from flowing in the direction of the outer housing structure. To this end, it is proposed to be provided on webs or brackets which are arranged on an inner housing wall and at least partially in the radial direction outwardly, such as. to guide vane webs or Leitschaufelhalterungen to provide broadening and form at these widening sealing surfaces against which heat shields sealingly so as to achieve a seal.

Unter Verbreiterung wird hierbei ein Erweiterung des Querschnitts eines Stegs oder einer Halterung in zumindest einer Richtung verstanden, die insbesondere in einer Richtung quer zu radialen Richtung verläuft, wobei vorzugsweise neben der Querschnittserweiterung auch eine erneute Querschnittsreduzierung vorgesehen ist, so dass die Verbreiterung nur in einem bestimmten Abschnitt des Stegs oder der Halterung vorliegt.Broadening is here understood to mean an enlargement of the cross section of a web or a holder in at least one direction, which extends in particular in a direction transverse to the radial direction, whereby a new cross-sectional reduction is preferably provided in addition to the cross-sectional enlargement, so that the broadening only in a certain Section of the web or the bracket is present.

Durch das Vorsehen von Verbreiterungen an notwendigerweise vorhandenen Leitschaufelstegen bzw. Leitschaufelaufhängungen oder -halterungen kann in einfacher Weise eine Verbesserung der Abdichtung erzielt werden, da keine zusätzlich zu montierenden Bauteile vorgesehen werden müssen und auch die notwendigen Abänderungen der übrigen Konstruktion begrenzt bleiben.By providing widenings on necessarily existing guide vane webs or guide vanes or mounts, an improvement can be made in a simple way the seal can be achieved because no additional components to be mounted must be provided and the necessary modifications to the rest of the construction remain limited.

Durch die Abdichtung mit mindestens einem, vorzugsweise mehreren Hitzeschilden gegenüber Leitschaufel - oder Leitkranzstegen bzw. Leitschaufel - oder Leitkranzaufhängungen kann ferner bewirkt werden, dass gut voneinander abgetrennte innere und äußere Hohlräume geschaffen werden, wobei die inneren Hohlräume im Bereich der inneren Gehäusewand und vorzugsweise beabstandet zur äußeren Gehäusewand vorliegen, während die äußeren Hohlräume im Bereich der äußeren Gehäusewand und vorzugsweise beabstandet von der inneren Gehäusewand vorliegen. Durch die Trennung von inneren und äußeren Hohlräumen kann eine effizientere Kühlwirkung erzielt werden, da die inneren Hohlräume als Puffer dienen, während in den äußeren Hohlräumen die Kühlluftführung vorgesehen werden kann. Durch den Puffer kann ein direkter Wärmeübergang vom Strömungskanal zur äußeren Gehäusestruktur vermieden oder zumindest eingeschränkt werden.By sealing with at least one, preferably more heat shields relative to guide vane or guide vane or guide vane or Leitkranzaufhängungen can also be effected that well separated inner and outer cavities are created, the inner cavities in the region of the inner housing wall and preferably spaced from outer housing wall, while the outer cavities in the region of the outer housing wall and preferably spaced from the inner housing wall. By separating the inner and outer cavities, a more efficient cooling effect can be achieved because the inner cavities serve as buffers, while in the outer cavities, the cooling air flow can be provided. Through the buffer, a direct heat transfer from the flow channel to the outer housing structure can be avoided or at least limited.

Die Verbreiterung an einem Steg oder einer Halterung der inneren Gehäusewand kann insbesondere einstückig ausgeführt sein, sodass zusätzliche Montagebauteile und zusätzliche Montageaufwand eingespart werden kann. Insbesondere kann die Verbreiterung an einem entsprechenden Steg oder einer Halterung angegossen sein.The broadening on a web or a holder of the inner housing wall may in particular be made in one piece, so that additional mounting components and additional assembly costs can be saved. In particular, the broadening can be cast on a corresponding web or a holder.

Vorzugsweise kann an einem in Umfangsrichtung um den Strömungskanal umlaufenden Steg oder einer entsprechenden Halterung der inneren Gehäusewand an gegenüberliegenden und voneinander wegweisenden Seiten jeweils mindestens eine Verbreiterung vorgesehen sein, an der jeweils ein Hitzeschild dichtend anliegt, sodass sowohl in axialer Richtung, als auch in Umfangsrichtung eine möglichst geschlossene Sperrwand aus Hitzeschilden zur Abtrennung eines äußeren Teil der Gehäusestruktur mit äußeren Hohlräumen von einem inneren Teil der Gehäusestruktur mit inneren Hohlräumen ausgebildet wird.Preferably, at least one widening may be provided on a web circulating circumferentially about the flow channel or a corresponding support of the inner housing wall on opposite sides facing away from each other, on each of which a heat shield sealingly abuts, so that both in the axial direction as well as in the circumferential direction as closed as possible barrier wall of heat shields for the separation of an outer part of the housing structure is formed with outer cavities of an inner part of the housing structure with internal cavities.

Damit lässt sich eine weitgehende Abtrennung der inneren und äußeren Hohlräume voneinander verwirklichen, sodass keine oder zumindest nur geringfügig Heißgase aus dem Strömungskanal oder den inneren Hohlräumen in den Bereich der äußeren Hohlräume gelangen können. Während die inneren Hohlräume weitgehend abgedichtet sind, um als Puffer zu wirken, können die äußeren Hohlräume entsprechende Kühlluftzutritts -öffnungen aufweisen, um einen Zufluss von Kühlluft zu ermöglichen.This allows a substantial separation of the inner and outer cavities realize each other, so that no or at least only slightly hot gases from the flow channel or the inner cavities can get into the region of the outer cavities. While the inner cavities are largely sealed to act as a buffer, the outer cavities may have corresponding cooling air inlet openings to allow for inflow of cooling air.

KURZBESCHREIBUNG DER FIGURBRIEF DESCRIPTION OF THE FIGURE

Die beigefügte Figur zeigt in rein schematischer Weise eine teilweise Schnittansicht einer erfindungsgemäßen Gehäusestruktur.The attached figure shows in a purely schematic way a partial sectional view of a housing structure according to the invention.

AUSFÜHRUNGSBEISPIELEmbodiment

Weitere Vorteile, Kennzeichen und Merkmale der vorliegenden Erfindung werden bei der nachfolgenden detaillierten Beschreibung eines Ausführungsbeispiels deutlich. Allerdings ist die Erfindung nicht auf dieses Ausführungsbeispiel beschränkt.Further advantages, characteristics and features of the present invention will become apparent in the following detailed description of an embodiment. However, the invention is not limited to this embodiment.

Die beigefügte Figur zeigt einen Ausschnitt aus einer erfindungsgemäßen Gehäusestruktur mit einer äußeren Gehäusewand 1, die sowohl in axialer Richtung als auch umlaufen um den von ihr begrenzten Strömungskanal segmentiert ausgeführt sein kann. Im Bereich des Strömungskanals ist eine Leitschaufel 3 angeordnet, die in Form eines Deckbands einen Teil der inneren Gehäusewand 2 darstellt. Von der Leitschaufel 3 bzw. dem Deckband und somit der inneren Gehäusewand 2 ist ein Leitschaufelsteg 4 schräg nach außen vorstehend angeordnet, der beispielsweise zur Fixierung der Leitschaufel 3 an der äußeren Gehäusewand 1 dienen kann.The attached figure shows a section of a housing structure according to the invention with an outer housing wall 1, which can be designed segmented both in the axial direction and circulate around the limited of its flow channel. In the region of the flow channel, a guide blade 3 is arranged, which forms a part of the inner housing wall 2 in the form of a shroud. From the guide vane 3 or the shroud and thus the inner housing wall 2, a guide blade web 4 is arranged projecting obliquely outwards, which can serve for example for fixing the guide vane 3 to the outer housing wall 1.

Zwischen der äußeren Gehäusewand 1 und der inneren Gehäusewand 2 sind Hitzeschilde 6,7 vorgesehen, die ebenfalls zumindest teilweise um den Strömungskanal umlaufend ausgebildet sind und die äußere Gehäusewand 1 vor den Temperaturen im Strömungskanal abschirmen sollen.Between the outer housing wall 1 and the inner housing wall 2 heat shields are provided 6.7, which are also at least partially formed circumferentially around the flow channel and to shield the outer housing wall 1 from the temperatures in the flow channel.

Die Hitzeschilder 6 und 7 begrenzen bei dem gezeigten Ausführungsbeispiel sowohl innere Hohlräume 9, als auch äußere Hohlräume 10.The heat shields 6 and 7 limit in the embodiment shown both inner cavities 9, as well as outer cavities 10th

Die äußeren Hohlräume 10 werden nicht nur von den Hitzeschilden 6,7 begrenzt, sondern auch von der äußeren Gehäusewand 1 bzw. dem Leitschaufelsteg 4. In der äußeren Gehäusewand 1 sind teilweise Kühlluftöffnungen 11 vorgesehen, die es ermöglichen, Luft aus der Umgebung in die äußeren Hohlräume 10 zu leiten, um eine Kühlwirkung für das Gehäuse bezüglich der hohen Temperaturen im Strömungskanal bereit zu stellen.The outer cavities 10 are limited not only by the heat shields 6,7, but also by the outer housing wall 1 and the Leitschaufelsteg 4. In the outer housing wall. 1 cooling air openings 11 are partially provided, which allow to direct air from the environment into the outer cavities 10 in order to provide a cooling effect for the housing with respect to the high temperatures in the flow channel.

Die Hitzeschilde 6,7 begrenzen weiterhin innere Hohlräume 9, die von den äußeren Hohlräumen 10 weitgehend abgetrennt und abgedichtet sind. Zu diesem Zweck weist der Leitschaufelsteg 4 beidseitig Verbreiterungen 5 auf, die einstückig an dem Leitschaufelsteg 4 angeordnet sind und beispielsweise unmittelbar beim Gießen der Leitschaufel 3 erzeugt werden können. An den Verbreiterungen 5 ist jeweils eine Dichtfläche 8 vorgesehen, die in Kontakt mit dem Hitzeschild 7 bzw. 6 ist, um die inneren Hohlräume 8 bzw. äußeren Hohlräume 10 abzudichten. Durch das Vorsehen von Verbreiterungen 5 an dem Leitschaufelsteg 4 ist es in einfacher Weise ohne großen konstruktiven Mehraufwand möglich, Dichtflächen für Hitzeschilde 6,7 bereit zu stellen, sodass gut voneinander getrennte innere Hohlräume 9 und äußere Hohlräume 10 gebildet werden.The heat shields 6.7 continue to limit internal cavities 9, which are largely separated from the outer cavities 10 and sealed. For this purpose, the guide blade web 4 on both sides of widenings 5, which are arranged integrally on the guide blade web 4 and, for example, can be generated directly during the casting of the guide blade 3. At the spacers 5, a sealing surface 8 is provided, which is in contact with the heat shield 7 and 6, respectively, to seal the inner cavities 8 and outer cavities 10. By providing widenings 5 on the guide blade web 4, it is possible in a simple manner without great additional design effort to provide sealing surfaces for heat shields 6, 7 so that well-separated inner cavities 9 and outer cavities 10 are formed.

Die inneren Hohlräume 9 sind beabstandet von der äußeren Gehäusewand 1 und die äußeren Hohlräume 10 sind beabstandet von der inneren Gehäusewand 2, sodass die inneren Hohlräume 9 als Temperaturpuffer dienen, während die äußeren Hohlräume 10 zur Führung von Kühlluft Verwendung finden können.The inner cavities 9 are spaced from the outer housing wall 1 and the outer cavities 10 are spaced from the inner housing wall 2, so that the inner cavities 9 serve as a temperature buffer, while the outer cavities 10 can be used to guide cooling air.

Damit können die äußere Gehäusewand 1 und die Komponenten im Bereich der äußeren Gehäusewand 1 effektiv gekühlt werden und die Temperaturbelastung kann abgesenkt werden, sodass Werkstoffe mit geringeren Anforderungen an die Temperaturbeständigkeit eingesetzt werden können.Thus, the outer housing wall 1 and the components in the region of the outer housing wall 1 can be effectively cooled and the temperature load can be lowered, so that materials can be used with lower requirements for temperature resistance.

Obwohl die vorliegende Erfindung anhand des Ausführungsbeispiels detailliert beschrieben worden ist, ist für den Fachmann selbstverständlich, dass die Erfindung nicht auf diese Ausführungsform beschränkt ist, sondern dass vielmehr Abwandlungen in der Weise möglich sind, dass einzelne Merkmale weggelassen oder andersartige Kombinationen verwirklicht werden können, solange der Schutzbereich der beigefügten Ansprüche nicht verlassen wird. Die vorliegende Offenbarung umfasst sämtliche Kombinationen der vorgestellten Einzelmerkmale.Although the present invention has been described in detail with reference to the embodiment, it will be understood by those skilled in the art that the invention is not limited to this embodiment, but rather modifications are possible in the manner that individual features omitted or other combinations can be realized, as long as the scope of the appended claims is not abandoned. The present disclosure includes all combinations of the featured individual features.

Claims (10)

Gehäusestruktur für eine Strömungsmaschine, insbesondere für eine Gasturbine oder ein Flugtriebwerk, mit einer äußeren Gehäusewand (1) und einer inneren Gehäusewand (2), wobei innere und äußere Gehäusewand einen Strömungskanal der Strömungsmaschine ringförmig umschließen und in radialer Richtung bezogen auf den Strömungskanal beabstandet sind, wobei zwischen innerer und äußerer Gehäusewand mindestens ein Hitzeschild (6,7) angeordnet ist, und wobei an der inneren Gehäusewand ein zumindest teilweise in radialer Richtung vorstehender Steg (4) oder eine zumindest teilweise in radialer Richtung vorstehende Halterung angeordnet sind,
dadurch gekennzeichnet, dass
der Steg oder die Halterung zumindest einseitig eine Verbreiterung (5) aufweist, die eine Dichtfläche (8) umfasst, an der das Hitzeschild dichtend anliegt.Housing structure for a turbomachine, in particular for a gas turbine or an aircraft engine, with an outer housing wall (1) and an inner housing wall (2), wherein inner and outer housing wall annularly surround a flow channel of the turbomachine and spaced in the radial direction with respect to the flow channel, wherein at least one heat shield (6, 7) is arranged between the inner and outer housing wall, and wherein a web (4) projecting at least partially in the radial direction or a support projecting at least partially in the radial direction are arranged on the inner housing wall,
characterized in that
the web or the holder at least on one side a widening (5), which comprises a sealing surface (8) against which the heat shield is sealingly applied. Gehäusestruktur nach Anspruch 1,
dadurch gekennzeichnet, dass
der Steg oder die Halterung an gegenüber liegenden und voneinander weg weisenden Seiten jeweils mindestens eine Verbreiterung (5) aufweist, die jeweils mindestens eine Dichtfläche umfasst, an der jeweils ein Hitzeschild dichtend anliegt.Housing structure according to claim 1,
characterized in that
the web or the holder on opposite and facing away from each other sides each having at least one widening (5), each comprising at least one sealing surface on which a heat shield in each case bears sealingly. Gehäusestruktur nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass
die Verbreiterung (5) einstückig an dem Steg oder der Halterung angeordnet, insbesondere angegossen ist.Housing structure according to claim 1 or 2,
characterized in that
the widening (5) arranged integrally on the web or the holder, in particular is cast on. Gehäusestruktur nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
das Hitzeschild (6,7) mit seiner radial äußeren Seite mindestens einen äußeren Hohlraum (10) begrenzt, der beabstandet von der inneren Gehäusewand ist.Housing structure according to one of the preceding claims,
characterized in that
the heat shield (6,7) defines with its radially outer side at least one outer cavity (10) which is spaced from the inner housing wall. Gehäusestruktur nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
das Hitzeschild (6,7) mit seiner radial inneren Seite mindestens einen inneren Hohlraum (9) begrenzt, der beabstandet von der äußeren Gehäusewand ist.Housing structure according to one of the preceding claims,
characterized in that
the heat shield (6,7) defines with its radially inner side at least one inner cavity (9), which is spaced from the outer housing wall. Gehäusestruktur nach einem der Ansprüche 4 oder 5,
dadurch gekennzeichnet, dass
die Begrenzung des inneren und/oder äußeren Hohlraums die Dichtfläche umfasst.Housing structure according to one of claims 4 or 5,
characterized in that
the boundary of the inner and / or outer cavity comprises the sealing surface. Gehäusestruktur nach einem der Ansprüche 4 bis 6,
dadurch gekennzeichnet, dass
innerer und äußerer Hohlraum (9,10) voneinander getrennt sind.Housing structure according to one of claims 4 to 6,
characterized in that
inner and outer cavity (9,10) are separated from each other. Gehäusestruktur nach einem der Ansprüche 4 bis 7,
dadurch gekennzeichnet, dass
der äußere Hohlraum mindestens eine Kühlluftzutrittsöffnung (11) aufweist.Housing structure according to one of claims 4 to 7,
characterized in that
the outer cavity has at least one cooling air inlet opening (11). Gehäusestruktur nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
die innere Gehäusewand durch zumindest einen Teil einer Leitschaufel (3) gebildet ist und der Steg ein Leitschaufelsteg oder Leitkranzsteg oder die Halterung eine Statoraufhängung ist.Housing structure according to one of the preceding claims,
characterized in that
the inner housing wall is formed by at least a part of a guide vane (3) and the web is a vane web or Leitkranzsteg or the holder is a stator suspension. Strömungsmaschine mit einer Gehäusestruktur nach einem der vorhergehenden Ansprüche.Turbomachine with a housing structure according to one of the preceding claims.
EP12188313.6A 2012-10-12 2012-10-12 Housing structure with improved sealing and cooling Not-in-force EP2719867B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP12188313.6A EP2719867B1 (en) 2012-10-12 2012-10-12 Housing structure with improved sealing and cooling
ES12188313.6T ES2531468T3 (en) 2012-10-12 2012-10-12 Box structure with improved sealing and cooling
US14/052,338 US9416672B2 (en) 2012-10-12 2013-10-11 Housing structure with improved seal and cooling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12188313.6A EP2719867B1 (en) 2012-10-12 2012-10-12 Housing structure with improved sealing and cooling

Publications (2)

Publication Number Publication Date
EP2719867A1 true EP2719867A1 (en) 2014-04-16
EP2719867B1 EP2719867B1 (en) 2015-01-21

Family

ID=47115341

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12188313.6A Not-in-force EP2719867B1 (en) 2012-10-12 2012-10-12 Housing structure with improved sealing and cooling

Country Status (3)

Country Link
US (1) US9416672B2 (en)
EP (1) EP2719867B1 (en)
ES (1) ES2531468T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10557364B2 (en) * 2016-11-22 2020-02-11 United Technologies Corporation Two pieces stator inner shroud

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020122716A1 (en) * 2001-02-28 2002-09-05 Beacock Robert John Methods and apparatus for cooling gas turbine engine blade tips
EP1384858A2 (en) * 2002-07-26 2004-01-28 General Electric Company Internal cooling of the case of a low pressure turbine
US20070231123A1 (en) * 2006-03-30 2007-10-04 Snecma Device for cooling a turbomachine turbine casing

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2800797B1 (en) 1999-11-10 2001-12-07 Snecma ASSEMBLY OF A RING BORDING A TURBINE TO THE TURBINE STRUCTURE
FR2803871B1 (en) * 2000-01-13 2002-06-07 Snecma Moteurs DIAMETER ADJUSTMENT ARRANGEMENT OF A GAS TURBINE STATOR
GB0619426D0 (en) * 2006-10-03 2006-11-08 Rolls Royce Plc A vane arrangement
FR2968030B1 (en) * 2010-11-30 2013-01-11 Snecma LOW-AIR TURBINE ENGINE PRESSURE TURBINE, COMPRISING A SECTORIZED DISTRIBUTOR
US8876458B2 (en) * 2011-01-25 2014-11-04 United Technologies Corporation Blade outer air seal assembly and support
US8985944B2 (en) * 2011-03-30 2015-03-24 General Electric Company Continuous ring composite turbine shroud

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020122716A1 (en) * 2001-02-28 2002-09-05 Beacock Robert John Methods and apparatus for cooling gas turbine engine blade tips
EP1384858A2 (en) * 2002-07-26 2004-01-28 General Electric Company Internal cooling of the case of a low pressure turbine
US20070231123A1 (en) * 2006-03-30 2007-10-04 Snecma Device for cooling a turbomachine turbine casing

Also Published As

Publication number Publication date
US9416672B2 (en) 2016-08-16
EP2719867B1 (en) 2015-01-21
ES2531468T3 (en) 2015-03-16
US20140102107A1 (en) 2014-04-17

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