EP2352909A1 - Guide blade carrier - Google Patents

Guide blade carrier

Info

Publication number
EP2352909A1
EP2352909A1 EP09783073A EP09783073A EP2352909A1 EP 2352909 A1 EP2352909 A1 EP 2352909A1 EP 09783073 A EP09783073 A EP 09783073A EP 09783073 A EP09783073 A EP 09783073A EP 2352909 A1 EP2352909 A1 EP 2352909A1
Authority
EP
European Patent Office
Prior art keywords
axial segments
support tube
axial
turbine
gas
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
EP09783073A
Other languages
German (de)
French (fr)
Other versions
EP2352909B1 (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

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
    • 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
    • F01D25/246—Fastening of diaphragms or stator-rings
    • 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
    • F05D2230/00—Manufacture
    • F05D2230/60—Assembly methods
    • F05D2230/64—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins
    • F05D2230/642—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins using maintaining alignment while permitting differential dilatation
    • 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
    • F05D2250/00—Geometry
    • F05D2250/20—Three-dimensional
    • F05D2250/23—Three-dimensional prismatic
    • F05D2250/232—Three-dimensional prismatic conical
    • 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
    • F05D2250/00—Geometry
    • F05D2250/20—Three-dimensional
    • F05D2250/24—Three-dimensional ellipsoidal
    • F05D2250/241—Three-dimensional ellipsoidal spherical
    • 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
    • F05D2250/00—Geometry
    • F05D2250/40—Movement of components
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/21—Utilizing thermal characteristic, e.g., expansion or contraction, etc.
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/32—Articulated members
    • Y10T403/32008—Plural distinct articulation axes
    • Y10T403/32041—Universal
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/45—Flexibly connected rigid members
    • Y10T403/451—Rigid 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.
  • guide vanes are also usually arranged between adjacent rows of blades and connected to the turbine housing and combined into guide blade rows.
  • the guide vanes are each fixed to a guide vane carrier of the turbine or compressor unit via a blade root, also referred to as a platform.
  • the guide vanes of the gas turbine can either be mounted on a common vane support. ger 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 be connected to each other via a tie rod connection according to DE 190 159.
  • 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.
  • This object is achieved according to the invention by connecting two adjacent axial segments with a number of tie rods respectively enclosed by a support tube, a ball disc being arranged at at least one end, but preferably at both ends of the respective support tube, which is located in a respective one Axial segment supporting cone socket is mounted.
  • the invention is based on the consideration that a longer service life of the guide blade carrier could be achieved by avoiding an excessive 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 with each other in various ways, for example by inserting respective coaxial openings through which the tie rod is guided into the relevant axial segments. 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 and the fixing points of the tie rod, which need not necessarily be arranged on the respective axial edge of the axial segment.
  • 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.
  • This ball bearing a radial securing of the support tube is ensured even at an inclination against the normal of the radial surface.
  • 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.
  • 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 means of 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.
  • a gas or steam turbine such as a guide vane and a gas and steam turbines nenstrom a gas and / or steam turbine with such a vane carrier.
  • 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.
  • the guide vane carrier 1 shows in detail a part of a guide vane carrier 1
  • the guide vane carrier 1 is usually conical or cylindrical in shape 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, the bishe- rige 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.
  • the Axialsegmente 2 over here a total of eight elastic compounds 6, each with a tie rod 8 ( Figure 3) braced together.
  • cross joints 10 are provided, which provide for centering of the axial segments 2 and the transmission of shear forces, which arise through flow forces, which are transmitted from the guide vanes to the axial segments.
  • each elastic connection 6 is shown in detail in FIG.
  • 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 around the tie rod 8. 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, which have corresponding openings. Between the openings, the support tube 14 is disposed 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 achieved, which can deform within certain limits flexible tensile and shear forces.
  • 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 washers 16 and conical pans 18 have an opening for the tie rod 8 and provide for a stable bilen stop while flexible storage of the support tube 14 to the axial segments. 2
  • the distortion can be seen in FIG 3 on the basis of the drawn extensions 20 of the axis of the spherical discs 16 against the axis of the tie rod 8.
  • the angle 22 between the respective axes is variable, without causing structural damage to the connection.
  • 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 shown once again in FIG. 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 has a compressor 102 for combustion air, a combustion chamber 104 and a turbine unit 106 for driving the compressor 102 and a generator or a working machine (not shown).
  • the turbine unit 106 and the compressor 102 are arranged on a common turbine shaft 108, also referred to as a turbine rotor, to which the generator or the working machine is also connected, and which is rotatably mounted about its central axis 109.
  • the combustion chamber 104 which is designed in the manner of an annular combustion chamber, is equipped with a number of burners 110 for the 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.
  • the turbine unit 106 includes a number of stationary vanes 114 which are also annularly attached 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 against the flow of 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 on a Leitschau- feixx 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 rotor blade 112 is fastened to the turbine shaft 108 in an analogous manner via a platform 119, also referred to as a blade root.
  • each guide ring 121 is arranged on a guide vane 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 in its entirety is designed as an annular structure which is positioned around the turbine shaft 108.
  • the guide blade carrier 1 can also be used in the compressor 102 or in a steam turbine.

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

Abstract

A guide blade carrier (1), particularly for a gas turbine (101), comprising a number of axial segments (2), is intended to attain a particularly high degree of operational reliability and long service life. To this end, two neighboring axial segments (2) are connected to a number of tie rods (8), each enclosed by a support tube (14), wherein a spherical disk (16) is arranged on at least one end of the respective support tube (14) and mounted in a conical socket (18) supported on the respective axial segment (2).

Description

Beschreibungdescription
LeitschaufeiträgerLeitschaufeiträger
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 üblicher- weise zwischen benachbarten Laufschaufelreihen mit dem Turbinengehäuse verbundene und zu Leitschaufelreihen zusammenge- fasste 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, guide vanes are also usually arranged between adjacent rows of blades and connected to the turbine housing and combined into guide blade rows.
Die Leitschaufeln sind dabei jeweils über einen auch als Plattform bezeichneten Schaufelfuß an einem Leitschaufelträger der Turbinen- oder Verdichtereinheit fixiert. Je nach Auslegungsziel der Gasturbine können dabei die Leitschaufeln der Gasturbine entweder an einem gemeinsamen Leitschaufelträ- ger 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 guide vanes are each fixed to a guide vane carrier of the turbine or compressor unit via a blade root, also referred to as a platform. Depending on the design target of the gas turbine, the guide vanes of the gas turbine can either be mounted on a common vane support. ger 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 be connected to each other via a tie rod connection according to DE 190 159.
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 12000C bis 15000C 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 0 C to 1500 0 C are sought for such gas turbines and also 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 Axialseg- menten, 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 Axialseg- factors, 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 benach- barte 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 according to the invention by connecting two adjacent axial segments with a number of tie rods respectively enclosed by a support tube, a ball disc being arranged at at least one end, but preferably at both ends of the respective support tube, which is located in a respective one Axial segment supporting cone socket is mounted.
Die Erfindung geht dabei von der Überlegung aus, dass eine höhere Lebensdauer des Leitschaufelträgers durch eine Vermeidung einer zu großen mechanischen Belastung durch eine unter- schiedliche 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 Zug- anker 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 blade carrier could be achieved by avoiding an excessive 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 with each other in various ways, for example by inserting respective coaxial openings through which the tie rod is guided into the relevant axial segments. 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 notwendigerweise am jeweils axialen Rand des Axialsegments angeordnet sein müssen. Durch den größerenThe 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 and the fixing points of the tie rod, which need not necessarily be arranged on the respective axial edge of the axial segment. By the bigger one
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.Distance between two axial segments increases the flexibility of the connection 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.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.
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.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 Sei- te 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. As a result, the flexibility of the connection increases in the case of a torsion or shear of the axial segments relative to one another, since the support tube is attached to the side facing the respective other axial segment. te 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 kardani- sche 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 means of 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 Dampfturbi- nenanlage eine Gas- und/oder Dampfturbine mit einem derartigen Leitschaufelträger.Advantageously, a gas or steam turbine such a guide vane and a gas and steam turbines nenanlage 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 ein- zelnen 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 Vor- teile 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, if shear or tensile forces occur due to different thermal expansion behavior, the Individual Axialsegmente no damage to the connection occur and the life of the vane support is substantially 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:An embodiment of the invention will be explained in more detail with reference to a drawing. Show:
FIG 1 zwei starr verbundene Axialsegmente eines Leitschaufelträgers nach dem Stand der Technik,1 shows two rigidly connected axial segments of a guide vane carrier according to the prior art,
FIG 2 zwei über Zuganker verbundene Axialsegmente eines Leitschaufeiträgers,2 two tie rods connected via axial segments of a Leitschaufeiträger,
FIG 3 einen Zuganker mit kugelgelagertem Stützrohr,3 shows a tie rod with ball-bearing support tube,
FIG 4 eine Kugelscheibe und eine Kegelpfanne zur Lagerung des Stützrohre, und4 shows a spherical disk and a conical socket for supporting the support tubes, and
FIG 5 einen Halbschnitt durch eine Gasturbine.5 shows 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.1 shows in detail a part of a guide vane carrier 1 In stationary gas turbines, the guide vane carrier 1 is usually conical or cylindrical in shape 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 bishe- rige 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, the bishe- rige 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 Kreuz- gelenke 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 vane support 1 according to FIG 2, the Axialsegmente 2 over here a total of eight elastic compounds 6, each with a tie rod 8 (Figure 3) braced together. In addition, cross joints 10 are provided, which provide for centering of the axial segments 2 and the transmission of shear forces, which arise through 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 hohl- zylindrisches Stützrohr 14 angeordnet. Dieses wirkt als Ab- Standshalter 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 construction of each elastic connection 6 is shown in detail in FIG. The central element is the cylindrically massive tie rod 8, which is fastened at its ends 12 to a respective axial segment 2. Around the tie rod 8, 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, which have corresponding openings. Between the openings, the support tube 14 is disposed 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 achieved, which can deform within certain limits flexible tensile and shear forces.
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 sta- bilen 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 washers 16 and conical pans 18 have an opening for the tie rod 8 and provide for a stable bilen stop while flexible storage of the support tube 14 to the axial segments. 2
Die Verwindung ist in FIG 3 anhand der eingezeichneten Ver- längerungen 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 Kugel- lagerung 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 distortion can be seen in FIG 3 on the basis of the drawn extensions 20 of the axis of the spherical discs 16 against the axis of the tie rod 8. 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 spherical 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 shown once again in FIG. 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 Turbinen- läufer 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 flüs- sigen 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 has a compressor 102 for combustion air, a combustion chamber 104 and a turbine unit 106 for driving the compressor 102 and a generator or a working machine (not shown). 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 rotor, to which the generator or the working machine is also connected, and which is rotatably mounted about its central axis 109. The combustion chamber 104, which is designed in the manner of an annular combustion chamber, is equipped with a number of burners 110 for the combustion of a liquid or gaseous fuel.
Die Turbineneinheit 106 weist eine Anzahl von mit der Turbinenwelle 108 verbundenen, rotierbaren Laufschaufeln 112 auf. 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 kranzför- mig 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 hin- gegen 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 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 annularly attached 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 against the flow of 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 Leitschau- feiträger 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 Laufschaufei 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 on a Leitschau- feiträger 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 rotor 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 Leitschaufel- reihen 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 rows of guide vanes, in each case a guide ring 121 is arranged on a guide vane 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 ringförmi- ge 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 in its entirety is designed as an annular structure which is positioned around the turbine shaft 108.
Durch die die Verwendung eines Leitschaufelträgers 1 der oben angegebenen Ausgestaltung wird eine erhöhte Lebensdauer und geringere Reparaturanfälligkeit der Gasturbine 1 erzielt.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.
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 Dampf- turbine zur Anwendung kommen. Damage to the vane support 1 due to thermal deformation of the axial segments 2 is avoided by the elastic connections 6. In this case, the guide blade carrier 1 can also be used in the compressor 102 or in a steam turbine.

Claims

Patentansprüche claims
1. Leitschaufelträger (1), insbesondere für eine Gas- oder Dampfturbine (101), eine Anzahl von Axialsegmenten (2) aufweist, wobei zwei unmittelbar benachbarte Axialsegmente (2) mit einer Anzahl von jeweils von einem Stützrohr (14) umschlossenen Zugankern (8) verbunden sind, dadurch gekennzeichnet, dass an zumindest einem Ende, vorzugsweise beiden Enden des jeweiligen Stützrohres (14) eine Kugelscheibe (16) angeordnet ist, welche in einer sich am jeweiligen Axialsegment (2) abstützenden Kegelpfanne (18) gelagert ist .1. Leitschaufelträger (1), in particular for a gas or steam turbine (101), a number of axial segments (2), wherein two immediately adjacent axial segments (2) with a number of each of a support tube (14) enclosed tie rods (8 ) are connected, characterized in that at at least one end, preferably both ends of the respective support tube (14) a spherical disc (16) is arranged, which in a on the respective axial segment (2) supporting the conical cup (18) is mounted.
2. Leitschaufelträger (1) nach Anspruch 1, bei dem der jeweilige Zuganker (8) und das jeweilige Stützrohr (14) zylindrisch ausgelegt sind und der Innendurchmesser des jeweiligen Stützrohres (14) größer als der Außen- durchmesser des jeweiligen Zugankers (8) ist.2. Guide vane carrier (1) according to claim 1, wherein the respective tie rod (8) and the respective support tube (14) are cylindrical and the inner diameter of the respective support tube (14) is greater than the outer diameter of the respective tie rod (8) ,
3. Leitschaufelträger (1) nach Anspruch 1 oder 2, bei dem die Anzahl der Zuganker (8) mindestens sechs beträgt .3. Guide vane carrier (1) according to claim 1 or 2, wherein the number of tie rods (8) is at least six.
4. Leitschaufelträger (1) nach Anspruch 1, 2 oder 3, bei dem die jeweiligen benachbarten Axialsegmente (2) mit einem Kreuzgelenk (10) verbunden sind .4. vane support (1) according to claim 1, 2 or 3, wherein the respective adjacent axial segments (2) are connected to a universal joint (10).
5. Gas- oder Dampfturbine (101) mit einem Leitschaufelträger (1) nach einem der Ansprüche 1 bis 4.5. Gas or steam turbine (101) with a guide vane carrier (1) according to one of claims 1 to 4.
6. Gas- und Dampfturbinenanlage mit einer Gas- und/oder Dampfturbine (101) nach Anspruch 5. 6. Gas and steam turbine plant with a gas 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)

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PCT/EP2009/061996 WO2010063500A1 (en) 2008-12-03 2009-09-16 Guide blade carrier
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DE102012222449A1 (en) * 2012-12-06 2014-06-26 Siemens Aktiengesellschaft Dynamoelectric machine with segmented structure of the stator and / or rotor

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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
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WO2010063500A1 (en) 2010-06-10
EP2194239A1 (en) 2010-06-09
EP2352909B1 (en) 2016-01-13
US20110236213A1 (en) 2011-09-29
CN102245863A (en) 2011-11-16
US8672616B2 (en) 2014-03-18

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