EP2342427A1 - Support d'aubes fixes, segmenté axialement, pour une turbine à gaz - Google Patents

Support d'aubes fixes, segmenté axialement, pour une turbine à gaz

Info

Publication number
EP2342427A1
EP2342427A1 EP09824439A EP09824439A EP2342427A1 EP 2342427 A1 EP2342427 A1 EP 2342427A1 EP 09824439 A EP09824439 A EP 09824439A EP 09824439 A EP09824439 A EP 09824439A EP 2342427 A1 EP2342427 A1 EP 2342427A1
Authority
EP
European Patent Office
Prior art keywords
gas turbine
guide vane
turbine
guide
vane carrier
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
EP09824439A
Other languages
German (de)
English (en)
Other versions
EP2342427B1 (fr
Inventor
Roderich Bryk
Sascha Dungs
Nicolas Savilius
Martin Hartmann
Uwe Kahlstorf
Karl Klein
Oliver Lüsebrink
Mirko Milazar
Oliver Schneider
Shilun Sheng
Vadim Shevchenko
Gerhard Simon
Norbert Thamm
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 EP09824439.5A priority Critical patent/EP2342427B1/fr
Priority to PL09824439T priority patent/PL2342427T3/pl
Publication of EP2342427A1 publication Critical patent/EP2342427A1/fr
Application granted granted Critical
Publication of EP2342427B1 publication Critical patent/EP2342427B1/fr
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
    • F01D9/00—Stators
    • F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
    • F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
    • F01D9/041—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector using blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • 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

Definitions

  • the invention relates to a guide vane carrier, in particular for a gas turbine, which consists of a number of axial segments.
  • Gas turbines are used in many areas to drive generators or work machines.
  • the energy content of a fuel is used to generate a rotational movement of a turbine shaft.
  • the fuel is burned in a combustion chamber, compressed air being supplied by an air compressor.
  • the working medium produced in the combustion chamber by the combustion of the fuel which is 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 usually arranged between adjacent rotor blade rows and connected to the turbine housing and combined into rows of guide blades.
  • the combustion chamber of the gas turbine can be embodied as a so-called annular combustion chamber, in which a plurality of burners arranged around the turbine shaft in the circumferential direction opens into a common combustion chamber space surrounded by a high-temperature-resistant surrounding wall.
  • the combustion chamber is designed in its entirety as an annular structure.
  • a plurality of combustion chambers Immediately adjoining the combustion chamber is generally followed by a first row of guide vanes of a turbine unit which, together with the blade row immediately downstream in the flow direction of the working medium, forms a first turbine stage of the turbine unit, which is usually followed by further turbine stages.
  • the guide vanes are each fixed to a vane support of the turbine unit via a blade root, also referred to as a platform.
  • the guide blade carrier for securing the platforms of the guide vanes comprise an insulation segment.
  • a guide ring on the guide vane support of the turbine unit is arranged in each case.
  • Such a guide ring is spaced by a radial gap of the blade tips of the fixed at the same axial position on the turbine shaft blades of the associated blade row.
  • thermodynamics an increase in the degree of efficiency can basically be achieved by increasing the outlet temperature at which the working medium leaves the combustion chamber 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.
  • the guide vane carrier of the gas turbine usually made of cast steel. This is suitable to withstand the high temperatures within the gas turbine and it can thus be ensured safe operation of the gas turbine.
  • the guide vanes of the gas turbine can either be fastened to a common guide vane carrier or separate axial segments are provided for each turbine stage.
  • a common guide vane carrier In any case, however, at least for large gas turbines, one or more very large castings, which require a correspondingly cost-intensive and technically complex construction.
  • the turbine vane carrier is exposed to the extremely high temperatures that require high temperature cast steel, but there is a temperature profile that has relatively small high temperature areas and a larger, low temperature, rear area.
  • the invention is therefore based on the object to provide a guide vane, which allows a technically simpler design and more flexible adaptation to the prevailing at the vane carrier temperature profile while maintaining operational safety.
  • This object is achieved according to the invention by designing at least one axial segment as a lattice structure.
  • the invention is based on the consideration that a more flexible adaptation to the temperature profile within the gas turbine could occur in the area of the guide blade carrier, in particular by different materials of the individual axial segments of the guide blade carrier.
  • high temperatures occur in particular in the region of the entanglement of the guide vanes and the ring segments, since these components cause a local heat input in the region of their attachment.
  • the foremost region of the guide blade carrier has a comparatively high compressor end temperature. set. At these points, from a thermal point of view, a relatively high quality material is necessary. For large areas of the turbine carrier, the temperature resistance of this material is not required. These areas could consist of cheaper and less expensive material.
  • the axial segments should continue to be solid in areas of low temperature. Therefore, these axial segments should be formed as a lattice structure with a plurality of tubes, rods, bars, beams, profiles or the like, ie as interconnected, arranged in the manner of a lattice structure struts.
  • Lattice structure on its inner and / or outer side provided with a sheet metal cladding For a special simple construction of the guide vane carrier is possible.
  • the embodiment with a sheet-metal-clad tubular construction can replace previously provided as castings sections of the vane support by a simpler structure, without jeopardizing the operational safety of the gas turbine. At the same time a smaller amount of material is needed.
  • the respective metal cladding on cooling air holes are also easier to manufacture than the cooling air holes required for castings, whereby a finer distribution to the subsequent ring segments can be provided by increasing the number of holes with the same cross-section or flow resistance.
  • the material of the respective axial segment and / or, where appropriate, the respective Sheet metal cladding adapted to the intended during operation local thermal and mechanical loads.
  • Such an adjustment ensures a precise matching of the material used in each case for the castings and / or the sheet metal cladding to the respective local temperature and force conditions. Areas exposed to very high temperatures should be made of a high-quality and heat-resistant material, while comparatively more favorable material can be used in the cooler areas of the guide vane carrier.
  • a number of axial segments are welded together.
  • the individual axial segments d. H. the individual lattice structures and the axial segments produced as castings a dimensionally stable and secure connection is ensured.
  • all axial segments are designed as a lattice structure.
  • a vane carrier namely the entire vane carrier may be formed as a lattice structure, where appropriate, segmentally different sheet metal panels are used on the inside.
  • segmentally different sheet metal panels are used on the inside.
  • Gas turbine is possible.
  • more favorable materials can be used in areas with lower temperature exposure and cost-intensive high-temperature materials remain restricted to the front, hot area of the gas turbine.
  • the remaining axial segments made of castings are comparatively smaller, allowing a simpler design of the vane carrier and the entire gas turbine.
  • the grid structure is less thermally conductive than a solid casting, also finds a lower heat conduction in the axial direction, in particular from the hot areas at the compressor exit in the rear cooler areas instead, thereby improving the cooling of the vane support and thus a lower axial and possibly also radial thermal Expansion is achieved.
  • this design shows great potential for further development of guide vane carriers, as more flexible thermal and mechanical requirements can be addressed.
  • the thermal expansion behavior can be set to a much better extent than before, and thus the necessary minimum gap can be reduced.
  • the guide Blade carrier 1 shows in detail a half section through a guide vane carrier 1.
  • the guide Blade carrier 1 usually conical or cylindrical shaped and consists of two segments, an upper and a lower segment, the z. B. are interconnected via flanges. Only the section through the upper segment is shown.
  • the illustrated vane carrier 1 comprises a number of axial segments 24 which are welded together to form a solid structure.
  • a number of axial segments 24 of the vane carrier 1 are formed as a grid construction 26, also called a grid structure.
  • the grid structures 26 are each provided on their inner side with a sheet metal lining 28.
  • the struts of the grid construction can be designed with a variety of profiles such as round, square or otherwise as a hollow body or in solid construction.
  • the remaining axial segments 24 are formed as castings 30.
  • the material of the cast parts 30 and the sheet metal linings 28 is in each case adapted to the thermal conditions in their respective region in the interior of the gas turbine.
  • a complete construction of the vane support 1 made of grid segments would also be possible.
  • 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, not shown, or a working machine.
  • the turbine unit 106 and the compressor 102 are arranged on a common turbine shaft 108, which is also referred to as a turbine rotor, and to which the generator or the working machine is also connected and which is rotatably mounted about its central axis 109.
  • the running in the manner of an annular combustion chamber combustion chamber 104 is provided with a number of Burners 110 equipped 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 the guide blade carrier 16 of the turbine unit 106.
  • the outer surface of each guide ring 121 is also the hot, the turbine unit 106 flowing through the working medium M and radially spaced from the outer end of the opposed blades 112 by a gap.
  • the guide rings 121 arranged between adjacent rows of guide blades serve in particular as cover elements which protect the inner housing in the guide blade carrier 1 or other housing built-in components against thermal overstress 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.
  • the leftmost axial segments 24 are made accordingly from a high temperature resistant material than in the gas channel downstream areas.
  • the lattice structure furthermore ensures good thermal insulation of the individual cast parts 30 from one another, as a result of which thermal deformations can be minimized.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne un support d'aubes fixes (1), en particulier pour une turbine à gaz (101), composé d'un certain nombre de segments axiaux (24). Tout en préservant la sécurité de fonctionnement, il convient d'obtenir une construction technique plus simple et une adaptation plus souple au profil de températures régnant au niveau du support d'aubes fixes. À cette fin, au moins un segment axial (24) est conçu sous la forme d'une structure en grille (26).
EP09824439.5A 2008-11-05 2009-09-10 Support d'aubes statorique axialement segmenté d'une turbine à gaz Not-in-force EP2342427B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP09824439.5A EP2342427B1 (fr) 2008-11-05 2009-09-10 Support d'aubes statorique axialement segmenté d'une turbine à gaz
PL09824439T PL2342427T3 (pl) 2008-11-05 2009-09-10 Dźwigar łopatek kierujących złożony z segmentów osiowych dla turbiny gazowej

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP08019365A EP2184445A1 (fr) 2008-11-05 2008-11-05 Support d'aubes statorique axialement segmenté d'une turbine à gaz
PCT/EP2009/061744 WO2010052050A1 (fr) 2008-11-05 2009-09-10 Support d'aubes fixes, segmenté axialement, pour une turbine à gaz
EP09824439.5A EP2342427B1 (fr) 2008-11-05 2009-09-10 Support d'aubes statorique axialement segmenté d'une turbine à gaz

Publications (2)

Publication Number Publication Date
EP2342427A1 true EP2342427A1 (fr) 2011-07-13
EP2342427B1 EP2342427B1 (fr) 2013-06-19

Family

ID=40497476

Family Applications (2)

Application Number Title Priority Date Filing Date
EP08019365A Withdrawn EP2184445A1 (fr) 2008-11-05 2008-11-05 Support d'aubes statorique axialement segmenté d'une turbine à gaz
EP09824439.5A Not-in-force EP2342427B1 (fr) 2008-11-05 2009-09-10 Support d'aubes statorique axialement segmenté d'une turbine à gaz

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP08019365A Withdrawn EP2184445A1 (fr) 2008-11-05 2008-11-05 Support d'aubes statorique axialement segmenté d'une turbine à gaz

Country Status (7)

Country Link
US (1) US8870526B2 (fr)
EP (2) EP2184445A1 (fr)
JP (1) JP5596042B2 (fr)
CN (1) CN102216568B (fr)
PL (1) PL2342427T3 (fr)
RU (1) RU2508450C2 (fr)
WO (1) WO2010052050A1 (fr)

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US10094287B2 (en) 2015-02-10 2018-10-09 United Technologies Corporation Gas turbine engine component with vascular cooling scheme
US10077664B2 (en) 2015-12-07 2018-09-18 United Technologies Corporation Gas turbine engine component having engineered vascular structure
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Also Published As

Publication number Publication date
PL2342427T3 (pl) 2013-11-29
CN102216568A (zh) 2011-10-12
EP2342427B1 (fr) 2013-06-19
EP2184445A1 (fr) 2010-05-12
RU2011122612A (ru) 2012-12-20
US8870526B2 (en) 2014-10-28
US20110268580A1 (en) 2011-11-03
JP5596042B2 (ja) 2014-09-24
WO2010052050A1 (fr) 2010-05-14
JP2012507652A (ja) 2012-03-29
CN102216568B (zh) 2015-11-25
RU2508450C2 (ru) 2014-02-27

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