EP2352909B1 - Nozzle vane carrier - Google Patents

Nozzle vane carrier Download PDF

Info

Publication number
EP2352909B1
EP2352909B1 EP09783073.1A EP09783073A EP2352909B1 EP 2352909 B1 EP2352909 B1 EP 2352909B1 EP 09783073 A EP09783073 A EP 09783073A EP 2352909 B1 EP2352909 B1 EP 2352909B1
Authority
EP
European Patent Office
Prior art keywords
axial segments
turbine
support tube
axial
segments
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.)
Not-in-force
Application number
EP09783073.1A
Other languages
German (de)
French (fr)
Other versions
EP2352909A1 (en
Inventor
Roderich Bryk
Oliver Strohmeier
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 AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP09783073.1A priority Critical patent/EP2352909B1/en
Publication of EP2352909A1 publication Critical patent/EP2352909A1/en
Application granted granted Critical
Publication of EP2352909B1 publication Critical patent/EP2352909B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/24Casings; Casing parts, e.g. diaphragms, casing fastenings
    • F01D25/246Fastening of diaphragms or stator-rings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/24Casings; Casing parts, e.g. diaphragms, casing fastenings
    • F01D25/243Flange connections; Bolting arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00Manufacture
    • F05D2230/60Assembly methods
    • F05D2230/64Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins
    • F05D2230/642Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins using maintaining alignment while permitting differential dilatation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00Geometry
    • F05D2250/20Three-dimensional
    • F05D2250/23Three-dimensional prismatic
    • F05D2250/232Three-dimensional prismatic conical
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00Geometry
    • F05D2250/20Three-dimensional
    • F05D2250/24Three-dimensional ellipsoidal
    • F05D2250/241Three-dimensional ellipsoidal spherical
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00Geometry
    • F05D2250/40Movement of components
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00Joints and connections
    • Y10T403/21Utilizing thermal characteristic, e.g., expansion or contraction, etc.
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00Joints and connections
    • Y10T403/32Articulated members
    • Y10T403/32008Plural distinct articulation axes
    • Y10T403/32041Universal
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00Joints and connections
    • Y10T403/45Flexibly connected rigid members
    • Y10T403/451Rigid sleeve encompasses flexible bushing

Definitions

  • the invention relates to a guide vane carrier, in particular for a gas or steam turbine, which consists of a number of axial segments.
  • Gas or steam turbines are used in many areas to drive generators or work machines.
  • the energy content of a fuel or superheated steam is used to generate a rotational movement of a turbine shaft.
  • the fuel is burned in a combustion chamber, wherein compressed air is supplied by an air compressor.
  • the working medium produced in the combustion chamber by the combustion of the fuel, under high pressure and at high temperature, is guided via a turbine unit arranged downstream of the combustion chamber, where it relaxes to perform work.
  • a number of rotor blades which are usually combined into blade groups or rows of blades, are arranged thereon and drive the turbine shaft via a momentum transfer from the working medium.
  • For guiding the flow of the working medium in the turbine unit also commonly associated between adjacent blade rows with the turbine housing and combined into rows of guide vanes are arranged.
  • the vanes are fixed in each case via a blade root, also referred to as a platform, on a guide vane carrier of the turbine or compressor unit.
  • the guide vanes of the gas turbine can either be mounted on a common guide vane carrier be attached or separate axial segments are provided for each turbine or compressor stage, which are usually rigidly connected together.
  • the use of a plurality of axial segments offers the advantage that on the one hand smaller and therefore less expensive castings are used, on the other hand, the materials of the individual segments can be individually adapted to the physical boundary conditions prevailing in the respective axial region.
  • the vane carrier In stationary gas turbines, the vane carrier is still usually conical or cylindrical in shape and the vane carrier or its individual axial segments each consist of an upper and a lower segment, the z. B. are interconnected via flanges. Axially adjacent axial segments can in this case via a tie rod connection according to DE 190 159 be connected to each other.
  • the invention is therefore based on the object to provide a guide vane, which achieves a longer service life with a particularly high operational safety.
  • the invention is based on the consideration that a longer service life of the guide vane carrier would be achievable by avoiding too great a mechanical load due to a different deformation due to temperature differences.
  • a particularly high mechanical load occurs at Leitschaufelanin consisting of a plurality of axial segments, in particular in the connection region between the individual axial segments. Since this can lead to damage in a rigid connection of two axial segments, the connection should be flexible.
  • a flexible connection can be achieved, in particular, by the fact that the axial segments are not connected in a materially bonded manner, but are merely braced with one another in a form-fitting manner. For bracing the axial segments a number of tie rods is provided.
  • the tie rods can connect two adjacent axial segments in different ways, for example, by each coaxial openings are introduced into the respective axial segments, through which the tie rod is guided. Then, for example, nuts are set to a thread of the tie rod, which nut a larger diameter at the side facing away from the respective adjacent axial segment of the respective opening as the respective opening. As a result, the two axial segments are braced together without entering into a cohesive connection.
  • the aim of the arrangement of tie rods between the axial segments of the vane support is a compound that can absorb radial or axial displacements by their flexibility, without material damage caused by tensile or shear forces.
  • a greater flexibility can be achieved by a support tube is braced between the adjacent axial segments, which surrounds the respective tie rods.
  • Such a support tube serves as a spacer between the axial segments or the fixing points of the tie rod, which need not necessarily be arranged on each axial edge of the Axialsegments Axialsegments. Due to the greater distance between two axial segments, the flexibility of the connection is increased and damage due to mechanical stress is even better avoided. In this respect, the displacements of the axial segments against each other are made possible by the support tubes and tie rods.
  • a spherical disc is arranged at one end of the respective support tube, which is mounted in a cone cone arranged on the respective axial segment.
  • Spherical disc and conical socket then form a ball joint, which, however, has an opening for the continuous tie rod.
  • respective tie rods and the respective support tube are designed cylindrical and the inner diameter of the respective support tube is larger than the outer diameter of the respective tie rod.
  • This increases the flexibility of the connection in a torsion or shear of the axial segments against each other, since the support tube on the side facing the other axial segment rests while the tie rod is fixed by, for example, a nut on the opposite side.
  • This results in different fixed points in a caused by torsion movement of tie rods or support tube from the normal of the radial surface.
  • By a larger inner diameter of the support tube support tube and tie rods are always spaced apart in all radial directions and thus can tilt freely despite different fixed points against the normal of the radial surface.
  • the number of tie rods is at least six.
  • three tie rods can then be provided for each segment of the respective axial segment, so that a secure three-point connection of the respective segments of the axial segments arises.
  • the respective adjacent axial segments are connected to a universal joint.
  • a universal joint By such universal joints an additional gimbal coupling of the respective axial segments is achieved via which a centering and simultaneous transmission of the guiding torque from one to the other carrier is possible, for. B., if only one fixation is provided. This achieves an even safer connection with high flexibility at the same time.
  • the advantages achieved by the invention are in particular that a secure and at the same time flexible coupling of the axial segments is achieved by the connection of the axial segments of a guide vane carrier with tie rods.
  • a secure and at the same time flexible coupling of the axial segments is achieved by the connection of the axial segments of a guide vane carrier with tie rods.
  • FIG. 1 shows in detail a portion of a vane carrier 1.
  • the vane support 1 is usually conical or cylindrical shaped and consists of two segments, an upper and a lower segment, the z. B. are interconnected via flanges.
  • the guide vane carrier 1 shown comprises two axial segments 2.
  • the axial segments 2 are connected to one another via connecting bridges 4. Although this ensures a secure and dimensionally stable connection, however, shows the previous Operating experience that act by the different thermal deformation of the axial segments 2 high tensile and shear forces on the connecting bridges 4, which can lead to material failure.
  • each elastic connection 6 is detailed in FIG FIG. 3 shown.
  • the central element is the cylindrically massive tie rod 8, which is fastened at its ends 12 to a respective axial segment 2.
  • a hollow cylindrical support tube 14 is arranged. This acts as a spacer between the axial segments 2.
  • the connection between the axial segments 2 is made via suitable fastening devices on the axial segments 2 having corresponding openings.
  • the support tube 14 is arranged on the side facing the other axial segment 2, then the tie rod 8 is guided through openings and support tube 14, which is then clamped on the opposite side, for example, with nuts.
  • a solid, but not cohesive connection is reached, which can deform flexibly under tensile and shear forces within certain limits.
  • spherical washers 16 are attached to the respective axial ends of the support tube. These are arranged in corresponding conical cups 18, which are each attached to an associated axial segment 2.
  • the spherical discs 16 and conical cups 18 have an opening for the tie rod 8 and ensure a stable Stop with simultaneous flexible mounting of the support tube 14 to the axial segments. 2
  • the twist is in FIG. 3 based on the illustrated extensions 20 of the axis of the spherical discs 16 against the axis of the tie rod 8 can be seen.
  • the angle 22 between the respective axes is variable, without causing structural damage to the connection. Due to the ball bearing, the elastic connection 6 is therefore particularly easy to deform in the case of radial offset as well as in case of twisting of the respective regions of the axial segments 2, without losing stability.
  • the spherical discs 16 and conical cups 18 are again in FIG. 4 shown. These may, for example, be designed according to DIN 6319 and be adapted in their geometric dimensions and their material to the respective requirements with respect to stability and flexibility of the elastic connection 6.
  • the gas turbine 101 includes a compressor 102 for combustion air, a combustion chamber 104 and a turbine unit 106 for driving the compressor 102 and a generator, not shown, or a working machine.
  • the turbine unit 106 and the compressor 102 are arranged on a common turbine shaft 108, also referred to as a turbine runner, to which the generator or the working machine is also connected and which is rotatably mounted about its central axis 109.
  • the combustor 104 which is in the form of an annular combustor, is equipped with a number of burners 110 for combustion of a liquid or gaseous fuel.
  • the turbine unit 106 has a number of rotatable blades 112 connected to the turbine shaft 108.
  • the blades 112 are annularly disposed on the turbine shaft 108 and thus form a number of blade rows. Furthermore, the turbine unit 106 includes a number of stationary vanes 114, which are also attached in a donut-like manner to a vane support 1 of the turbine unit 106 to form rows of vanes.
  • the blades 112 serve to drive the turbine shaft 108 by momentum transfer from the turbine unit 106 flowing through the working medium M.
  • the vanes 114 serve to flow the working medium M between two seen in the flow direction of the working medium M consecutive blade rows or blade rings.
  • a successive pair of a ring of vanes 114 or a row of vanes and a ring of blades 112 or a blade row is also referred to as a turbine stage.
  • Each vane 114 has a platform 118 which is arranged to fix the respective vane 114 to a vane support 1 of the turbine unit 106 as a wall element.
  • the platform 118 is a thermally comparatively heavily loaded component, which forms the outer boundary of a hot gas channel for the turbine unit 106 flowing through the working medium M.
  • Each blade 112 is fastened to the turbine shaft 108 in an analogous manner via a platform 119, also referred to as a blade root.
  • a guide ring 121 is arranged on a guide blade carrier 1 of the turbine unit 106.
  • the outer surface of each guide ring 121 is also exposed to the hot, the turbine unit 106 flowing through the working medium M and spaced in the radial direction from the outer end of the blades opposite him 112 through a gap.
  • the guide rings 121 arranged between adjacent rows of guide blades serve in particular as cover elements which support the inner housing in the guide blade carrier 1 or protect other housing-mounted components from thermal overload by the hot working medium M flowing through the turbine 106.
  • the combustion chamber 104 is configured in the exemplary embodiment as a so-called annular combustion chamber, in which a plurality of burners 110 arranged around the turbine shaft 108 in the circumferential direction open into a common combustion chamber space.
  • the combustion chamber 104 is configured in its entirety as an annular structure, which is positioned around the turbine shaft 108 around.
  • a guide vane carrier 1 of the above-mentioned embodiment By the use of a guide vane carrier 1 of the above-mentioned embodiment, an increased service life and lower repair susceptibility of the gas turbine 1 is achieved. Damage to the vane support 1 due to thermal deformation of the axial segments 2 is avoided by the elastic connections 6.
  • the guide blade carrier 1 can also be used in the compressor 102 or in a steam turbine.

Landscapes

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

Description

Die Erfindung betrifft einen Leitschaufelträger, insbesondere für eine Gas- oder Dampfturbine, der aus einer Anzahl von Axialsegmenten besteht.The invention relates to a guide vane carrier, in particular for a gas or steam turbine, which consists of a number of axial segments.

Gas- oder Dampfturbinen werden in vielen Bereichen zum Antrieb von Generatoren oder von Arbeitsmaschinen eingesetzt. Dabei wird der Energieinhalt eines Brennstoff bzw. überhitzten Dampfs zur Erzeugung einer Rotationsbewegung einer Turbinenwelle genutzt.Gas or steam turbines are used in many areas to drive generators or work machines. In this case, the energy content of a fuel or superheated steam is used to generate a rotational movement of a turbine shaft.

Bei der Gasturbine wird der Brennstoff dazu in einer Brennkammer verbrannt, wobei von einem Luftverdichter verdichtete Luft zugeführt wird. Das in der Brennkammer durch die Verbrennung des Brennstoffs erzeugte, unter hohem Druck und unter hoher Temperatur stehende Arbeitsmedium wird dabei über eine der Brennkammer nachgeschaltete Turbineneinheit geführt, wo es sich arbeitsleistend entspannt.In the gas turbine, the fuel is burned in a combustion chamber, wherein compressed air is supplied by an air compressor. The working medium produced in the combustion chamber by the combustion of the fuel, under high pressure and at high temperature, is guided via a turbine unit arranged downstream of the combustion chamber, where it relaxes to perform work.

Zur Erzeugung der Rotationsbewegung der Turbinenwelle sind dabei an dieser eine Anzahl von üblicherweise in Schaufelgruppen oder Schaufelreihen zusammengefassten Laufschaufeln angeordnet, die über einen Impulsübertrag aus dem Arbeitsmedium die Turbinenwelle antreiben. Zur Strömungsführung des Arbeitsmediums in der Turbineneinheit sind zudem üblicherweise zwischen benachbarten Laufschaufelreihen mit dem Turbinengehäuse verbundene und zu Leitschaufelreihen zusammengefasste Leitschaufeln angeordnet.To generate the rotational movement of the turbine shaft, a number of rotor blades, which are usually combined into blade groups or rows of blades, are arranged thereon and drive the turbine shaft via a momentum transfer from the working medium. For guiding the flow of the working medium in the turbine unit also commonly associated between adjacent blade rows with the turbine housing and combined into rows of guide vanes are arranged.

Die Leitschaufeln sind dabei jeweils über einen auch als Plattform bezeichneten Schaufelfuß an einem Leitschaufelträger der Turbinen- oder Verdichtereinheut fixiert. Je nach Auslegungsziel der Gasturbine können dabei die Leitschaufeln der Gasturbine entweder an einem gemeinsamen Leitschaufelträger befestigt werden oder es sind für jede Turbinen- oder Verdichterstufe separate Axialsegmente vorgesehen, die üblicherweise starr miteinander verbunden werden. Die Verwendung mehrerer Axialsegmente bietet den Vorteil, dass einerseits kleinere und damit günstiger zu fertigende Gussteile zur Anwendung kommen, andererseits lassen sich die Materialien der einzelnen Segmente individuell an die im jeweiligen axialen Bereich vorherrschenden physikalischen Randbedingungen anpassen.The vanes are fixed in each case via a blade root, also referred to as a platform, on a guide vane carrier of the turbine or compressor unit. Depending on the design goal of the gas turbine, the guide vanes of the gas turbine can either be mounted on a common guide vane carrier be attached or separate axial segments are provided for each turbine or compressor stage, which are usually rigidly connected together. The use of a plurality of axial segments offers the advantage that on the one hand smaller and therefore less expensive castings are used, on the other hand, the materials of the individual segments can be individually adapted to the physical boundary conditions prevailing in the respective axial region.

Bei stationären Gasturbinen ist der Leitschaufelträger weiterhin üblicherweise konisch oder zylindrisch geformt und der Leitschaufelträger oder dessen einzelne Axialsegmente bestehen jeweils aus einem oberen und einem unteren Segment, die z. B. über Flansche miteinander verbunden sind. Axial zueinander benachbarte Axialsegmente können dabei über eine Zugankerverbindung gemäß DE 190 159 miteinander verbunden sein.In stationary gas turbines, the vane carrier is still usually conical or cylindrical in shape and the vane carrier or its individual axial segments each consist of an upper and a lower segment, the z. B. are interconnected via flanges. Axially adjacent axial segments can in this case via a tie rod connection according to DE 190 159 be connected to each other.

Bei der Auslegung heutiger Gasturbinen ist zusätzlich zur erreichbaren Leistung üblicherweise ein besonders hoher Wirkungsgrad ein Auslegungsziel. Eine Erhöhung des Wirkungsgrades lässt sich dabei aus thermodynamischen Gründen grundsätzlich durch eine Erhöhung der Austrittstemperatur erreichen, mit der das Arbeitsmedium aus der Brennkammer der Gasturbine ab- und in die Turbineneinheit einströmt. Daher werden Temperaturen von etwa 1200°C bis 1500°C für derartige Gasturbinen angestrebt und auch erreicht.In the design of today's gas turbines usually a particularly high efficiency is a design target in addition to the achievable performance. An increase in the efficiency can be achieved for thermodynamic reasons basically by increasing the outlet temperature with which the working fluid from the combustion chamber of the gas turbine off and flows into the turbine unit. Therefore, temperatures of about 1200 ° C to 1500 ° C are sought for such gas turbines and achieved.

Bei derartig hohen Temperaturen des Arbeitsmediums sind jedoch die diesem ausgesetzten Komponenten und Bauteile hohen thermischen Belastungen ausgesetzt. Bei einem aus mehreren Axialsegmenten zusammengesetzten Leitschaufelträger führt dies aufgrund des vorliegenden Temperaturprofils und des unterschiedlichen thermischen Verformungsverhaltens der einzelnen Axialsegmente zu einer axialen und radialen Verschiebung der Axialsegmente zueinander. Dies führt zu einer hohen mechanischen Belastung der Verbindung zwischen den Axialsegmenten, was zu einer schnellen Materialermüdung mit entstehenden Rissen oder gar Brüchen im Verbindungsbereich führen kann.At such high temperatures of the working medium, however, exposed to this components and components are exposed to high thermal loads. In the case of a guide blade carrier composed of a plurality of axial segments, this results in an axial and radial displacement of the axial segments relative to one another on account of the present temperature profile and the different thermal deformation behavior of the individual axial segments. This leads to a high mechanical load on the connection between the axial segments, which can lead to rapid material fatigue with resulting cracks or even breaks in the connection area.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Leitschaufelträger anzugeben, der bei einer besonders hohen betrieblichen Sicherheit eine höhere Lebensdauer erreicht.The invention is therefore based on the object to provide a guide vane, which achieves a longer service life with a particularly high operational safety.

Diese Aufgabe wird erfindungsgemäß gelöst, indem zwei benachbarte Axialsegmente mit einer Anzahl von jeweils von einm Stützrohr umschlossenen Zugankern verbunden sind, wobei an zumindest einem Ende, vorzugsweise jedoch an beiden Enden des jeweiligen Stützrohres eine Kugelscheibe angeordnet ist, welche in einer sich am jeweiligen Axialsegment abstützenden Kegelpfanne gelagert ist.This object is achieved by two adjacent axial segments are connected to a number of each enclosed by einm support tube tie rods, wherein at least one end, but preferably at both ends of the respective support tube, a spherical disc is arranged, which is supported in a at the respective axial segment Conical pan is stored.

Die Erfindung geht dabei von der Überlegung aus, dass eine höhere Lebensdauer des Leitschaufelträgers durch eine Vermeidung einer zu großen mechanischen Belastung durch eine unterschiedliche Verformung aufgrund von Temperaturunterschieden erreichbar wäre. Dabei tritt eine besonders hohe mechanische Belastung bei aus mehreren Axialsegmenten bestehenden Leitschaufelträgern insbesondere im Verbindungsbereich zwischen den einzelnen Axialsegmenten auf. Da dies bei einer starren Verbindung zweier Axialsegmente zu Beschädigungen führen kann, sollte die Verbindung flexibel ausgelegt werden. Eine flexible Verbindung kann insbesondere dadurch erreicht werden, dass die Axialsegmente nicht stoffschlüssig verbunden, sondern lediglich formschlüssig miteinander verspannt werden. Zur Verspannung der Axialsegmente ist eine Anzahl von Zugankern vorgesehen. Die Zuganker können dabei auf verschiedene Weise zwei benachbarte Axialsegmente miteinander verbinden, beispielsweise indem in die betreffenden Axialsegmente jeweils koaxiale Öffnungen eingebracht sind, durch die der Zuganker geführt ist. An der dem jeweils benachbarten Axialsegment abgewandten Seite der jeweiligen Öffnung werden dann beispielsweise Schraubenmuttern auf ein Gewinde des Zugankers gesetzt, welche Schraubenmutter einen größeren Durchmesser als die jeweilige Öffnung besitzen. Dadurch werden die beiden Axialsegmente miteinander verspannt, ohne eine stoffschlüssige Verbindung einzugehen.The invention is based on the consideration that a longer service life of the guide vane carrier would be achievable by avoiding too great a mechanical load due to a different deformation due to temperature differences. In this case, a particularly high mechanical load occurs at Leitschaufelträgern consisting of a plurality of axial segments, in particular in the connection region between the individual axial segments. Since this can lead to damage in a rigid connection of two axial segments, the connection should be flexible. A flexible connection can be achieved, in particular, by the fact that the axial segments are not connected in a materially bonded manner, but are merely braced with one another in a form-fitting manner. For bracing the axial segments a number of tie rods is provided. The tie rods can connect two adjacent axial segments in different ways, for example, by each coaxial openings are introduced into the respective axial segments, through which the tie rod is guided. Then, for example, nuts are set to a thread of the tie rod, which nut a larger diameter at the side facing away from the respective adjacent axial segment of the respective opening as the respective opening. As a result, the two axial segments are braced together without entering into a cohesive connection.

Ziel der Anordnung von Zugankern zwischen den Axialsegmenten des Leitschaufelträgers ist eine Verbindung, die radiale oder axiale Verschiebungen durch ihre Flexibilität auffangen kann, ohne dass Materialschäden durch Zug- oder Scherkräfte auftreten. Eine größere Flexibilität ist erreichbar, indem zwischen den benachbarten Axialsegmenten ein Stützrohr verspannt ist, welches den jeweiligen Zuganker umschließt. Ein derartiges Stützrohr dient als Abstandshalter zwischen den Axialsegmenten bzw. den Fixierungsstellen des Zugankers, die nicht motwendigerweise am jeweils axialen Rand des Axialsegments angeordnet sein müssen. Durch den größeren Abstand zwischen zwei Axialsegmenten wird die Flexibilität der Verbindung vergrößert und Beschädigungen durch mechanische Belastung werden noch besser vermieden. Insofern werden die Verschiebungen der Axialsegmente gegeneinander von den Stützrohren und Zugankern ermöglicht.The aim of the arrangement of tie rods between the axial segments of the vane support is a compound that can absorb radial or axial displacements by their flexibility, without material damage caused by tensile or shear forces. A greater flexibility can be achieved by a support tube is braced between the adjacent axial segments, which surrounds the respective tie rods. Such a support tube serves as a spacer between the axial segments or the fixing points of the tie rod, which need not necessarily be arranged on each axial edge of the Axialsegments Axialsegments. Due to the greater distance between two axial segments, the flexibility of the connection is increased and damage due to mechanical stress is even better avoided. In this respect, the displacements of the axial segments against each other are made possible by the support tubes and tie rods.

Um eine gute Sicherung des jeweiligen Stützrohrs zu erreichen, ist an einem Ende des jeweiligen Stützrohres eine Kugelscheibe angeordnet, welche in einer am jeweiligen Axialsegment angeordneten Kegelpfanne gelagert ist. Kugelscheibe und Kegelpfanne bilden dann ein Kugelgelenk, welches jedoch eine Öffnung für den durchgehenden Zuganker aufweist. Durch dieses Kugellager ist eine radiale Sicherung des Stützrohres auch bei einer Neigung gegen die Normale der Radialfläche gewährleistet.In order to achieve a good assurance of the respective support tube, a spherical disc is arranged at one end of the respective support tube, which is mounted in a cone cone arranged on the respective axial segment. Spherical disc and conical socket then form a ball joint, which, however, has an opening for the continuous tie rod. By this ball bearing a radial securing of the support tube is ensured even at an inclination against the normal of the radial surface.

In vorteilhafter Ausgestaltung sind dabei der jeweilige Zuganker und das jeweilige Stützrohr zylindrisch ausgelegt und der Innendurchmesser des jeweiligen Stützrohres ist größer als der Außendurchmesser des jeweiligen Zugankers. Dadurch erhöht sich die Flexibilität der Verbindung bei einer Torsion oder Scherung der Axialsegmente gegeneinander, da das Stützrohr an der dem jeweils anderen Axialsegment zugewandten Seite aufliegt, während der Zuganker durch beispielsweise eine Schraubenmutter auf der abgewandten Seite fixiert ist. Dadurch ergeben sich unterschiedliche Fixpunkte bei einer durch Torsion verursachten Bewegung von Zuganker bzw. Stützrohr aus der Normalen der Radialfläche. Durch einen größeren Innendurchmesser des Stützrohres sind Stützrohr und Zuganker in alle radialen Richtungen stets voneinander beabstandet und können sich so trotz unterschiedlicher Fixpunkte frei gegen die Normale der Radialfläche neigen.In an advantageous embodiment of the respective tie rods and the respective support tube are designed cylindrical and the inner diameter of the respective support tube is larger than the outer diameter of the respective tie rod. This increases the flexibility of the connection in a torsion or shear of the axial segments against each other, since the support tube on the side facing the other axial segment rests while the tie rod is fixed by, for example, a nut on the opposite side. This results in different fixed points in a caused by torsion movement of tie rods or support tube from the normal of the radial surface. By a larger inner diameter of the support tube support tube and tie rods are always spaced apart in all radial directions and thus can tilt freely despite different fixed points against the normal of the radial surface.

In vorteilhafter Ausgestaltung beträgt die Anzahl der Zuganker mindestens sechs. Insbesondere bei einem Leitschaufelträger, der aus einem oberen und unteren Segment besteht, können dann für jedes Segment des jeweiligen Axialsegments je drei Zuganker vorgesehen sein, so dass eine sichere Dreipunktverbindung der jeweiligen Segmente der Axialsegmente entsteht.In an advantageous embodiment, the number of tie rods is at least six. In particular, in the case of a guide blade carrier, which consists of an upper and lower segment, three tie rods can then be provided for each segment of the respective axial segment, so that a secure three-point connection of the respective segments of the axial segments arises.

In weiterer vorteilhafter Ausgestaltung sind die jeweiligen benachbarten Axialsegmente mit einem Kreuzgelenk verbunden. Durch derartige Kreuzgelenke wird eine zusätzliche kardanische Kopplung der jeweiligen Axialsegmente erreicht, über die eine Zentrierung und gleichzeitige Übertragung des Leitmoments von einem auf den anderen Träger möglich ist, z. B., wenn nur eine Fixierung vorgesehen ist. Dadurch wird eine noch sicherere Verbindung bei gleichzeitig hoher Flexibilität erzielt.In a further advantageous embodiment, the respective adjacent axial segments are connected to a universal joint. By such universal joints an additional gimbal coupling of the respective axial segments is achieved via which a centering and simultaneous transmission of the guiding torque from one to the other carrier is possible, for. B., if only one fixation is provided. This achieves an even safer connection with high flexibility at the same time.

Vorteilhafterweise umfasst eine Gas- oder Dampfturbine einen derartigen Leitschaufelträger sowie eine Gas- und Dampfturbinenanlage eine Gas- und/oder Dampfturbine mit einem derartigen Leitschaufelträger.Advantageously, a gas or steam turbine such a vane carrier and a gas and steam turbine plant comprises a gas and / or steam turbine with such a vane carrier.

Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, dass durch die Verbindung der Axialsegmente eines Leitschaufelträgers mit Zugankern eine sichere und gleichzeitig flexible Kopplung der Axialsegmente erreicht wird. Dadurch können bei auftretenden Scher- oder Zugkräften durch unterschiedliches thermisches Ausdehnungsverhalten der einzelnen Axialsegmente keine Beschädigungen der Verbindung auftreten und die Lebensdauer des Leitschaufelträgers wird wesentlich erhöht. Damit wird die Verwendung eines axial segmentierten Leitschaufelträgers attraktiver, der weitere Vorteile bietet, wie beispielsweise kleinere Bauteile, einfachere Reparierbarkeit und die Möglichkeit der Verwendung unterschiedlicher Materialen für die einzelnen Axialsegmente.The advantages achieved by the invention are in particular that a secure and at the same time flexible coupling of the axial segments is achieved by the connection of the axial segments of a guide vane carrier with tie rods. As a result, occurring shear or tensile forces due to different thermal expansion behavior of the individual Axial segments no damage to the connection occur and the life of the vane support is significantly increased. This makes the use of an axially segmented vane carrier more attractive, which offers further advantages, such as smaller components, easier reparability and the possibility of using different materials for the individual axial segments.

Ein Ausführungsbeispiel der Erfindung wird anhand einer Zeichnung näher erläutert. Darin zeigen:

FIG 1
zwei starr verbundene Axialsegmente eines Leitschaufelträgers nach dem Stand der Technik,
FIG 2
zwei über Zuganker verbundene Axialsegmente eines Leitschaufelträgers,
FIG 3
einen Zuganker mit kugelgelagertem Stützrohr,
FIG 4
eine Kugelscheibe und eine Kegelpfanne zur Lagerung des Stützrohre, und
FIG 5
einen Halbschnitt durch eine Gasturbine.
An embodiment of the invention will be explained in more detail with reference to a drawing. Show:
FIG. 1
two rigidly connected axial segments of a guide vane carrier according to the prior art,
FIG. 2
two axial segments of a vane carrier connected via tie rods,
FIG. 3
a tie rod with ball-bearing support tube,
FIG. 4
a spherical disc and a cone socket for supporting the support tubes, and
FIG. 5
a half section through a gas turbine.

Gleiche Teile sind in allen Abbildungen mit denselben Bezugszeichen versehen.Identical parts are provided with the same reference numerals in all figures.

FIG 1 zeigt im Detail einen Teil eines Leitschaufelträgers 1. Bei stationären Gasturbinen ist der Leitschaufelträger 1 üblicherweise konisch oder zylindrisch geformt und besteht aus zwei Segmenten, einem oberen und einem unteren Segment, die z. B. über Flansche miteinander verbunden sind. FIG. 1 shows in detail a portion of a vane carrier 1. In stationary gas turbine, the vane support 1 is usually conical or cylindrical shaped and consists of two segments, an upper and a lower segment, the z. B. are interconnected via flanges.

Der gezeigte Leitschaufelträger 1 umfasst zwei Axialsegmente 2. Dabei sind die Axialsegmente 2 über Verbindungsbrücken 4 miteinander verbunden. Dadurch ist zwar eine sichere und formstabile Verbindung gewährleistet, jedoch zeigt die bisherige Betriebserfahrung, dass durch die unterschiedliche thermische Verformung der Axialsegmente 2 hohe Zug- und Scherkräfte auf die Verbindungsbrücken 4 wirken, die zu Materialversagen führen können.The guide vane carrier 1 shown comprises two axial segments 2. The axial segments 2 are connected to one another via connecting bridges 4. Although this ensures a secure and dimensionally stable connection, however, shows the previous Operating experience that act by the different thermal deformation of the axial segments 2 high tensile and shear forces on the connecting bridges 4, which can lead to material failure.

Zum Ausgleich dieser Zug- und Scherkräfte sind im Leitschaufelträger 1 nach der FIG 2 die Axialsegmente 2 über hier insgesamt acht elastische Verbindungen 6 mit jeweils einem Zuganker 8 (FIG 3) miteinander verspannt. Zusätzlich sind Kreuzgelenke 10 vorgesehen, die für eine Zentrierung der Axialsegmente 2 und die Weiterleitung von Scherkräften sorgen, welche durch Strömungskräfte entstehen, die von den Leitschaufeln an die Axialsegmente übertragen werden.To compensate for these tensile and shear forces are in the guide vane 1 after the FIG. 2 the axial segments 2 over here a total of eight elastic connections 6, each with a tie rod 8 (FIG. FIG. 3 ) clamped together. In addition, universal joints 10 are provided, which provide for a centering of the axial segments 2 and the transmission of shear forces, which arise by flow forces, which are transmitted from the guide vanes to the axial segments.

Der Aufbau jeder elastischen Verbindungen 6 ist detailliert in FIG 3 dargestellt. Zentrales Element ist der zylindrischmassive Zuganker 8, der an seinen Enden 12 an jeweils einem Axialsegment 2 befestigt ist. Um den Zuganker 8 ist ein hohlzylindrisches Stützrohr 14 angeordnet. Dieses wirkt als Abstandshalter zwischen den Axialsegmenten 2. Die Verbindung zwischen den Axialsegmenten 2 wird über geeignete Befestigungsvorrichtungen auf den Axialsegmenten 2 hergestellt, die entsprechende Öffnungen aufweisen. Zwischen den Öffnungen wird an der jeweils dem anderen Axialsegment 2 zugewandten Seite das Stützrohr 14 angeordnet, danach wird durch Öffnungen und Stützrohr 14 der Zuganker 8 geführt, welcher dann an der jeweils abgewandten Seite beispielsweise mit Schraubenmuttern verspannt wird. Somit ist eine feste, jedoch nicht stoffschlüssige Verbindung erreicht, die sich in gewissen Grenzen flexibel bei Zug- und Scherkräften verformen kann.The structure of each elastic connection 6 is detailed in FIG FIG. 3 shown. The central element is the cylindrically massive tie rod 8, which is fastened at its ends 12 to a respective axial segment 2. To the tie rod 8 is a hollow cylindrical support tube 14 is arranged. This acts as a spacer between the axial segments 2. The connection between the axial segments 2 is made via suitable fastening devices on the axial segments 2 having corresponding openings. Between the openings, the support tube 14 is arranged on the side facing the other axial segment 2, then the tie rod 8 is guided through openings and support tube 14, which is then clamped on the opposite side, for example, with nuts. Thus, a solid, but not cohesive connection is reached, which can deform flexibly under tensile and shear forces within certain limits.

Um eine noch bessere Flexibilität bei gleichzeitiger Stabilität der Verbindung zu erreichen, sind an den jeweiligen axialen Enden des Stützrohres 14 Kugelscheiben 16 angebracht. Diese sind in entsprechend passenden Kegelpfannen 18 angeordnet, die jeweils an einem zugeordneten Axialsegment 2 angebracht sind. Die Kugelscheiben 16 und Kegelpfannen 18 weisen eine Öffnung für den Zuganker 8 auf und sorgen für einen stabilen Halt bei gleichzeitiger flexibler Lagerung des Stützrohrs 14 an den Axialsegmenten 2.In order to achieve an even better flexibility with simultaneous stability of the connection, 14 spherical washers 16 are attached to the respective axial ends of the support tube. These are arranged in corresponding conical cups 18, which are each attached to an associated axial segment 2. The spherical discs 16 and conical cups 18 have an opening for the tie rod 8 and ensure a stable Stop with simultaneous flexible mounting of the support tube 14 to the axial segments. 2

Die Verwindung ist in FIG 3 anhand der eingezeichneten Verlängerungen 20 der Achse der Kugelscheiben 16 gegen die Achse des Zugankers 8 ersichtlich. Je nach thermisch bedingter Verformung der Axialsegmente 2 ist der Winkel 22 zwischen den jeweiligen Achsen variabel, ohne dass dabei strukturelle Schäden der Verbindung zu befürchten sind. Durch die Kugellagerung ist die elastische Verbindung 6 somit besonders leicht bei radialem Versatz als auch bei Verwindungen der jeweiligen Bereiche der Axialsegmente 2 verformbar, ohne dabei an Stabilität einzubüßen.The twist is in FIG. 3 based on the illustrated extensions 20 of the axis of the spherical discs 16 against the axis of the tie rod 8 can be seen. Depending on the thermally induced deformation of the axial segments 2, the angle 22 between the respective axes is variable, without causing structural damage to the connection. Due to the ball bearing, the elastic connection 6 is therefore particularly easy to deform in the case of radial offset as well as in case of twisting of the respective regions of the axial segments 2, without losing stability.

Die Kugelscheiben 16 und Kegelpfannen 18 sind noch einmal in FIG 4 dargestellt. Diese können beispielsweise nach DIN 6319 ausgestaltet sein und in ihren geometrischen Maßen und ihrem Material an die jeweiligen Erfordernisse hinsichtlich Stabilität und Flexibilität der elastischen Verbindung 6 angepasst sein.The spherical discs 16 and conical cups 18 are again in FIG. 4 shown. These may, for example, be designed according to DIN 6319 and be adapted in their geometric dimensions and their material to the respective requirements with respect to stability and flexibility of the elastic connection 6.

Ein aus elastisch verbundenen Axialsegmenten 2 bestehender Leitschaufelträger 1 sollte beispielsweise in einer Gasturbine verwendet werden. Die Gasturbine 101 gemäß FIG 5 weist einen Verdichter 102 für Verbrennungsluft, eine Brennkammer 104 sowie eine Turbineneinheit 106 zum Antrieb des Verdichters 102 und eines nicht dargestellten Generators oder einer Arbeitsmaschine auf. Dazu sind die Turbineneinheit 106 und der Verdichter 102 auf einer gemeinsamen, auch als Turbinenläufer bezeichneten Turbinenwelle 108 angeordnet, mit der auch der Generator bzw. die Arbeitsmaschine verbunden ist, und die um ihre Mittelachse 109 drehbar gelagert ist. Die in der Art einer Ringbrennkammer ausgeführte Brennkammer 104 ist mit einer Anzahl von Brennern 110 zur Verbrennung eines flüssigen oder gasförmigen Brennstoffs bestückt.An existing of elastically connected axial segments 2 guide vane 1 should be used for example in a gas turbine. The gas turbine 101 according to FIG. 5 includes a compressor 102 for combustion air, a combustion chamber 104 and a turbine unit 106 for driving the compressor 102 and a generator, not shown, or a working machine. For this purpose, the turbine unit 106 and the compressor 102 are arranged on a common turbine shaft 108, also referred to as a turbine runner, to which the generator or the working machine is also connected and which is rotatably mounted about its central axis 109. The combustor 104, which is in the form of an annular combustor, is equipped with a number of burners 110 for combustion of a liquid or gaseous fuel.

Die Turbineneinheit 106 weist eine Anzahl von mit der Turbinenwelle 108 verbundenen, rotierbaren Laufschaufeln 112 auf.The turbine unit 106 has a number of rotatable blades 112 connected to the turbine shaft 108.

Die Laufschaufeln 112 sind kranzförmig an der Turbinenwelle 108 angeordnet und bilden somit eine Anzahl von Laufschaufelreihen. Weiterhin umfasst die Turbineneinheit 106 eine Anzahl von feststehenden Leitschaufeln 114, die ebenfalls kranzförmig unter der Bildung von Leitschaufelreihen an einem Leitschaufelträger 1 der Turbineneinheit 106 befestigt sind. Die Laufschaufeln 112 dienen dabei zum Antrieb der Turbinenwelle 108 durch Impulsübertrag vom die Turbineneinheit 106 durchströmenden Arbeitsmedium M. Die Leitschaufeln 114 dienen hingegen zur Strömungsführung des Arbeitsmediums M zwischen jeweils zwei in Strömungsrichtung des Arbeitsmediums M gesehen aufeinander folgenden Laufschaufelreihen oder Laufschaufelkränzen. Ein aufeinander folgendes Paar aus einem Kranz von Leitschaufeln 114 oder einer Leitschaufelreihe und aus einem Kranz von Laufschaufeln 112 oder einer Laufschaufelreihe wird dabei auch als Turbinenstufe bezeichnet.The blades 112 are annularly disposed on the turbine shaft 108 and thus form a number of blade rows. Furthermore, the turbine unit 106 includes a number of stationary vanes 114, which are also attached in a donut-like manner to a vane support 1 of the turbine unit 106 to form rows of vanes. The blades 112 serve to drive the turbine shaft 108 by momentum transfer from the turbine unit 106 flowing through the working medium M. The vanes 114, however, serve to flow the working medium M between two seen in the flow direction of the working medium M consecutive blade rows or blade rings. A successive pair of a ring of vanes 114 or a row of vanes and a ring of blades 112 or a blade row is also referred to as a turbine stage.

Jede Leitschaufel 114 weist eine Plattform 118 auf, die zur Fixierung der jeweiligen Leitschaufel 114 an einem Leitschaufelträger 1 der Turbineneinheit 106 als Wandelement angeordnet ist. Die Plattform 118 ist dabei ein thermisch vergleichsweise stark belastetes Bauteil, das die äußere Begrenzung eines Heißgaskanals für das die Turbineneinheit 106 durchströmende Arbeitsmedium M bildet. Jede Laufschaufel 112 ist in analoger Weise über eine auch als Schaufelfuß bezeichnete Plattform 119 an der Turbinenwelle 108 befestigt.Each vane 114 has a platform 118 which is arranged to fix the respective vane 114 to a vane support 1 of the turbine unit 106 as a wall element. The platform 118 is a thermally comparatively heavily loaded component, which forms the outer boundary of a hot gas channel for the turbine unit 106 flowing through the working medium M. Each blade 112 is fastened to the turbine shaft 108 in an analogous manner via a platform 119, also referred to as a blade root.

Zwischen den beabstandet,voneinander angeordneten Plattformen 118 der Leitschaufeln 114 zweier benachbarter Leitschaufelreihen ist jeweils ein Führungsring 121 an einem Leitschaufelträger 1 der Turbineneinheit 106 angeordnet. Die äußere Oberfläche jedes Führungsrings 121 ist dabei ebenfalls dem heißen, die Turbineneinheit 106 durchströmenden Arbeitsmedium M ausgesetzt und in radialer Richtung vom äußeren Ende der ihm gegenüberliegenden Laufschaufeln 112 durch einen Spalt beabstandet. Die zwischen benachbarten Leitschaufelreihen angeordneten Führungsringe 121 dienen dabei insbesondere als Abdeckelemente, die das Innengehäuse im Leitschaufelträger 1 oder andere Gehäuse-Einbauteile vor einer thermischen Überbeanspruchung durch das die Turbine 106 durchströmende heiße Arbeitsmedium M schützen.Between the spaced-apart platforms 118 of the guide vanes 114 of two adjacent guide blade rows, a guide ring 121 is arranged on a guide blade carrier 1 of the turbine unit 106. The outer surface of each guide ring 121 is also exposed to the hot, the turbine unit 106 flowing through the working medium M and spaced in the radial direction from the outer end of the blades opposite him 112 through a gap. The guide rings 121 arranged between adjacent rows of guide blades serve in particular as cover elements which support the inner housing in the guide blade carrier 1 or protect other housing-mounted components from thermal overload by the hot working medium M flowing through the turbine 106.

Die Brennkammer 104 ist im Ausführungsbeispiel als so genannte Ringbrennkammer ausgestaltet, bei der eine Vielzahl von in Umfangsrichtung um die Turbinenwelle 108 herum angeordneten Brennern 110 in einen gemeinsamen Brennkammerraum münden. Dazu ist die Brennkammer 104 in ihrer Gesamtheit als ringförmige Struktur ausgestaltet, die um die Turbinenwelle 108 herum positioniert ist.The combustion chamber 104 is configured in the exemplary embodiment as a so-called annular combustion chamber, in which a plurality of burners 110 arranged around the turbine shaft 108 in the circumferential direction open into a common combustion chamber space. For this purpose, the combustion chamber 104 is configured in its entirety as an annular structure, which is positioned around the turbine shaft 108 around.

Durch die die Verwendung eines Leitschaufelträgers 1 der oben angegebenen Ausgestaltung wird eine erhöhte Lebensdauer und geringere Reparaturanfälligkeit der Gasturbine 1 erzielt. Durch die elastischen Verbindungen 6 werden nämlich Beschädigungen des Leitschaufelträgers 1 durch thermische Verformungen der Axialsegmente 2 vermieden. Dabei kann der Leitschaufelträger 1 auch im Verdichter 102 oder in einer Dampfturbine zur Anwendung kommen.By the use of a guide vane carrier 1 of the above-mentioned embodiment, an increased service life and lower repair susceptibility of the gas turbine 1 is achieved. Damage to the vane support 1 due to thermal deformation of the axial segments 2 is avoided by the elastic connections 6. The guide blade carrier 1 can also be used in the compressor 102 or in a steam turbine.

Claims (6)

  1. Stator blade carrier (1),
    especially for a gas turbine or steam turbine (101), which has a number of axial segments (2),
    wherein two directly adjacent axial segments (2) are connected by a number of tie rods (8) which in each case are enclosed by a support tube (14),
    characterized in that
    a spherical disk (16), which is mounted in a conical cup (18) which is supported on the respective axial segment (2), is arranged at at least one end, preferably at both ends, of the respective support tube (14).
  2. Stator blade carrier (1) according to Claim 1,
    in which the respective tie rod (8) and the respective support tube (14) are of cylindrical design and the inside diameter of the respective support tube (14) is larger than the outside diameter of the respective tie rod (8).
  3. Stator blade carrier (1) according to Claim 1 or 2,
    in which the number of tie rods (8) is at least six.
  4. Stator blade carrier (1) according to Claim 1, 2 or 3,
    in which the respective adjacent axial segments (2) are connected by a universal joint (10).
  5. Gas turbine or steam turbine (101) with a stator blade carrier (1) according to one of Claims 1 to 4.
  6. Gas turbine and steam turbine plant with a gas turbine and/or steam turbine (101) according to Claim 5.
EP09783073.1A 2008-12-03 2009-09-16 Nozzle vane carrier Not-in-force EP2352909B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09783073.1A EP2352909B1 (en) 2008-12-03 2009-09-16 Nozzle vane carrier

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP08020992A EP2194239A1 (en) 2008-12-03 2008-12-03 Nozzle vane carrier
EP09783073.1A EP2352909B1 (en) 2008-12-03 2009-09-16 Nozzle vane carrier
PCT/EP2009/061996 WO2010063500A1 (en) 2008-12-03 2009-09-16 Guide blade carrier

Publications (2)

Publication Number Publication Date
EP2352909A1 EP2352909A1 (en) 2011-08-10
EP2352909B1 true EP2352909B1 (en) 2016-01-13

Family

ID=40823290

Family Applications (2)

Application Number Title Priority Date Filing Date
EP08020992A Withdrawn EP2194239A1 (en) 2008-12-03 2008-12-03 Nozzle vane carrier
EP09783073.1A Not-in-force EP2352909B1 (en) 2008-12-03 2009-09-16 Nozzle vane carrier

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP08020992A Withdrawn EP2194239A1 (en) 2008-12-03 2008-12-03 Nozzle vane carrier

Country Status (4)

Country Link
US (1) US8672616B2 (en)
EP (2) EP2194239A1 (en)
CN (1) CN102245863A (en)
WO (1) WO2010063500A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012222449A1 (en) * 2012-12-06 2014-06-26 Siemens Aktiengesellschaft Dynamoelectric machine with segmented structure of the stator and / or rotor

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE190159C (en) * 1907-10-25
GB589541A (en) * 1941-09-22 1947-06-24 Hayne Constant Improvements in axial flow turbines, compressors and the like
FR1057993A (en) * 1952-04-08 1954-03-12 Rolls Royce Improvements to turbo-machines
US2934316A (en) * 1955-11-18 1960-04-26 Worthington Corp Turbine casing
US3625550A (en) * 1969-10-31 1971-12-07 Edouard Beyeler Union joint for tubing
US4684320A (en) * 1984-12-13 1987-08-04 United Technologies Corporation Axial flow compressor case
US4840410A (en) * 1988-05-05 1989-06-20 Welkey Joseph J Apparatus for making a swiveled flow line connection
JPH11343807A (en) * 1998-06-01 1999-12-14 Mitsubishi Heavy Ind Ltd Connecting stator blade for steam turbine
US7584621B2 (en) * 2005-08-05 2009-09-08 Siemens Energy, Inc. Radially expanding turbine engine exhaust cylinder interface

Also Published As

Publication number Publication date
EP2352909A1 (en) 2011-08-10
CN102245863A (en) 2011-11-16
US8672616B2 (en) 2014-03-18
US20110236213A1 (en) 2011-09-29
EP2194239A1 (en) 2010-06-09
WO2010063500A1 (en) 2010-06-10

Similar Documents

Publication Publication Date Title
EP2342427B1 (en) Axial segmented vane support for a gas turbine
EP2617979B1 (en) De-icing device for gas turbine engine
EP2527253B1 (en) De-icing device for an aviation gas turbine engine
EP3000984A1 (en) Turbine vane adjustment device for a gas turbine
EP2342425B1 (en) Gas turbine with securing plate between blade base and disk
EP2344723B1 (en) Gas turbine with seal plates on the turbine disk
EP2211023A1 (en) Guide vane system for a turbomachine with segmented guide vane carrier
EP1970532A1 (en) Rotor of a thermal fluid flow engine and gas turbine
DE102015116935A1 (en) Safety device for axially securing a blade and rotor device with such a securing device
EP2025867A1 (en) Rotor for an axial flow engine
EP3176386B1 (en) Inner shroud assembly, corresponding inner shroud, inner casing and turbomachine
EP2347101B1 (en) Gas turbine and corresponding gas or steam turbine plant
EP2206885A1 (en) Gas turbine
EP2352909B1 (en) Nozzle vane carrier
EP2526263A2 (en) Housing system for an axial turbomachine
EP2347100B1 (en) Gas turbine having cooling insert
EP1970528A1 (en) Rotor of a thermal fluid flow engine
EP2823154A1 (en) A coolant bridging line for a gas turbine, which coolant bridging line can be inserted into a hollow, cooled turbine blade
EP1429077B1 (en) Gas turbine
EP2218882A1 (en) Stator vane carrier system
EP1564376B1 (en) Turbomachine rotor construction
DE919802C (en) Device for fastening rotor blades for centrifugal machines with axial flow
EP3492712B1 (en) Support device for a housing of a turbomachine, housing for a turbomachine and turbomachine
EP0799971B1 (en) Thermal barrier for turbine rotor
DE10233881B4 (en) By thermal effects radially variable ring element

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20110513

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SIEMENS AKTIENGESELLSCHAFT

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20150803

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: CH

Ref legal event code: NV

Representative=s name: SIEMENS SCHWEIZ AG, CH

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 770663

Country of ref document: AT

Kind code of ref document: T

Effective date: 20160215

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502009012054

Country of ref document: DE

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20160113

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160113

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160113

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160113

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160113

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160413

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160414

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160113

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160113

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160113

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160513

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160113

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160113

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160513

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502009012054

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160113

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160113

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160113

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160113

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160113

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160113

26N No opposition filed

Effective date: 20161014

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160930

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160113

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160413

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502009012054

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160113

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20160916

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20170531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160930

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160930

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160916

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160916

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170401

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160916

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 770663

Country of ref document: AT

Kind code of ref document: T

Effective date: 20160916

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20160930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160916

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160113

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20090916

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160113

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160113

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160113