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
  • F01D9/042—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector fixing blades to stators
• • 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
  • 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
  • F05D2230/20—Manufacture essentially without removing material
  • F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
• • 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
  • F05D2230/20—Manufacture essentially without removing material
  • F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
  • F05D2230/232—Manufacture essentially without removing material by permanently joining parts together by welding
  • F05D2230/238—Soldering
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
  • F05D2240/00—Components
  • F05D2240/10—Stators
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
  • F05D2240/00—Components
  • F05D2240/80—Platforms for stationary or moving blades
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
  • F05D2260/00—Function
  • F05D2260/30—Retaining components in desired mutual position
• • 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
  • Y10T29/00—Metal working
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/49316—Impeller making
  • Y10T29/4932—Turbomachine making
  • Y10T29/49323—Assembling fluid flow directing devices, e.g., stators, diaphragms, nozzles

Definitions

• the invention relates to a vane segment of an ther ⁇ mischen turbomachine , in particular a gas turbine, with at least one profiled on a platform profiled blade, wherein at the substantially flat, the
• Airfoil side facing away from the platform a number of fasteners for attachment of the vane segment is arranged on an associated vane carrier.
• Gas turbines are used in many areas to drive generators or work machines.
• the energy content of a fuel to produce a Rotati ⁇ onsquel a turbine shaft used.
• the fuel is burned in a combustion chamber, compressed air being supplied by an air compressor.
• Produced in the Brennkam ⁇ mer by the combustion of the fuel, under high pressure and high-temperature standing working medium is guided via a standardized downstream of the combustion chambers Turbinenein- where it is work-expanded.
• a number of rotor blades which are usually combined into groups of blades or rows of blades, are arranged thereon, which conveyors, via a momentum transfer, out of the flow medium
• the working fluid typically have a profiled, réellerecktes along a blade axis for the airfoil geeigne ⁇ th guidance on, to the end for attachment of the turbine blade at the respective Carrier body is formed transversely to the blade axis extending platform.
• the top of the platform facing the airfoil forms an outer boundary surface for the hot gas flow channel of the gas turbine.
• the platform of the respective vane usually has a number of hook-like fastening elements on its underside or rear side facing away from the vane blade.
• a similar hook fastening of the axial space of two guide vanes of adjacent turbine stages bridging guide ring is known for example from EP 1 505 259 Al.
• the vane is inserted with its fasteners or mounting hooks into corresponding receiving grooves of a vane carrier, aligned and then suitably, for. with the help of Stemmblechen, fixed.
• an additional fastener is still provided by means of which the hook of the guide ring in the guide blade carrier can be further braced.
• a plurality of circumferentially of the gas turbine mutually adjacent vane blades of a row of guide vanes can be arranged on a common platform, so that the complete, hereinafter referred to as vane ⁇ segment blade unit using the platform-side mounting hooks axially or in Circumferential direction in the associated vane carrier is inserted.
• vane ⁇ segment blade unit using the platform-side mounting hooks axially or in Circumferential direction in the associated vane carrier is inserted.
• vane in the following, especially in the claims, always include the case of a single vane with only one blade, unless this is not explicitly excluded.
• the vane, or the complete routing ⁇ is vane segment as part of a casting made are such that the platform and the platform side fastening elements ⁇ integral mitgegossene components of the guide vane fei or nozzle segment.
• a so-called wax pattern of the blade or of the blade segment is manufactured, which is subsequently provided by such ⁇ derholtes dipping into a ceramic mass with a ceramic coating ⁇ .
• the invention is therefore based on the object of specifying a guide vane segment of the type mentioned, which is designed for simple and cost-effective production while avoiding casting problem zones for a particularly reliable and secure attachment to an associated vane carrier. Furthermore, a method suitable for the production of the vane segment should be specified.
• the object is achieved in that at least one section of at least one of the fastening elements is a separately manufactured component which is fixedly connected to the side of the platform facing away from the airfoil.
• the invention is based on the consideration that the casting material for the vane segment usually should be optimized to a high high-temperature strength back to stability as high operational safety and structural Sta ⁇ and a long service life of the immediacy ⁇ bar exposed to the hot working medium sections ,
• such an interpretation is, as has now been found, may not be optimal for the functionally and structurally decoupled from the rest of the blade segment Be ⁇ fastening elements including the hook, which are exposed on the one hand by the upstream platform only a comparatively low thermal load, however on the other hand have to absorb relatively high mechanical loads and bearing ⁇ or holding forces.
• the connecting element is expediently designed in the manner of a flat connection plate with a flat support surface ⁇ .
• the connection element or the connection plate may ver ⁇ lowers in a corresponding recess of the platform may be arranged, in particular, thereby an easy to manufacture stator blade segment can be specified, since the geometry are difficult to access for the Gußher ein the Leitschaufelsegmenthaken has been eliminated.
• the respective fastening element comprises a hook protruding from the platform, bent at an angle, which is adapted in its shape and contour to the associated receiving groove of a Leit ⁇ blade carrier.
• a possible alternative to this is a substantially straight profile piece that is moved into a polygonal inclusion in the turbine housing a ⁇ .
• the connecting element is positively fixed in a matched to the shape of the connecting element depression or groove of the platform.
• a positive connection is for example given by the fact that the platform in the edge region of the recess or the groove has a number of projections which engage around the kausele ⁇ ment each on its side facing away from the support surface.
• the connecting element is then laterally lent into the recess or the receiving groove of the platform is inserted and then fixed in a suitable manner to the case ⁇ play positively, positively and / or cohesively, against lateral slipping. Because the connection forces are essentially by the projections positively embracing the connecting element are received, the additional fixation must be designed only for relatively low loads.
• a cohesive connection preferably by soldering or welding, may be provided.
• the respective fastening element for a high mechanical load capacity is preferably produced integrally from a one-component workpiece.
• the attachment hook can be milled or extruded as a straight profile piece and bent in a second operation in the required radius.
• the buildin ⁇ actuating element is made of a nozzle segment in comparison to the remaining less resistant to high temperatures, but made tougher material.
• the guide vane or Leitschau ⁇ felsegment for secure attachment to the guide vane on a plurality of fasteners preferably each of the fasteners is in the manner described above separately manufactured and ausgestaltetes component.
• a gas turbine typically includes a plurality of turbine stages, each of the turbine stages including a plurality of stator vanes circumferentially around the flow passage on the turbine housing, which in their entirety form a row of vanes.
• a ⁇ in each case a plurality of adjacent guide vanes to a guide blade segment or a "Mehrung" summarized in.
• Each of the guide vanes the or each vane ⁇ segment expediently has a platform with hakenarti ⁇ gen fastening elements, wherein the specifications for the hooking profile with regard to bending angle and / or bending dius usually vary with the installation position, ie in particular depend on the turbine stage or the guide vane row.
• the material selection for the fastener can be optimized to the Verhakungsan petitionen out, especially in terms of load bearing, wear and / or seal.
• Leitschaufelsegmentes is much easier. Tolerances can be set or adhered to more easily.
• An interlocking profile can be used as a standard for all turbine stages / performance classes and adapted to the respective intended use by different bending radii. Casting problem areas are avoided in the casting. The wax tools for the vanes are simpler, have fewer inserts or slides.
• FIG. 2 shows a guide blade with a fastening element ge ⁇ according to a second embodiment
• the illustrated in Figure 1 in a schematic side view cut-way and partially cut Leit ⁇ scoop 2 comprises a extending in the direction of the blade axis 4 profiled airfoil 6, to which in the region of the blade root a substantially transverse to the blade axis 4 oriented platform 8 is formed , In the installed state of the vane 2 which is oriented toward the blade 6 toward "top 10".
• an outer Be ⁇ delimitation of a hot gas leading flow channel in a gas turbine (not shown) 12 or back of the platform 8 is a number of ha ⁇ kenartigen fasteners 14, by means of which the guide vane 2 in an associated vane support (not shown) mounted on the turbine housing / is attached.
• the image section shown here is only one of the fastening elements 14 ⁇ visible, which is mounted with respect to the axial direction 16 near the trailing edge of the blade 6; another fastener is disposed in the vicinity of the leading edge not shown here.
• the fastening element 14 is specifically adapted to the mechanical loads associated with the entanglement in the guide vane carrier in the case of a production that is simple and inexpensive.
• the fastener 14 is designed as a separate, independent of the remaining vane 2 and only subsequently connected to her component, wherein the material used for the fastener 14 ⁇ material is less resistant to high temperatures, but it is tougher than the material from which the blade 6 and Platt ⁇ form are made. 8
• the fastening element 14 comprises in addition to a projecting from the rear ⁇ side 12 of the platform 8, approximately at right angles angled mounting hook 18 thereon a molded connection plate 20 with a rectangular base.
• the Verbin ⁇ manure plate 20 is positively deepening in an associated Ver ⁇ 21 of the platform 8 is fixed. With its flat bearing surface 22, the connecting plate 20 lies flat on the base surface of the recess 21. The depth of the recess 21 corresponds to the thickness of the connecting plate 20, so that in the edge area to the platform surface, an offset-free About ⁇ gear results.
• two opposite Lekskan ⁇ th 24 of the connecting plate 20 are chamfered in the embodiment shown in FIG 1 that they are encompassed by complementary, parallel to the longitudinal edges 24 extending projections 26 on the edge of the platform-side recess 21 or edged.
• the projections 26 thus form a perpendicular to the plane extending guide and mounting rail into which the connecting plate 20 for mounting the fastener 14th is inserted.
• additional fixing means not shown here may be provided.
• a shift in the other two spatial directions, so on the one hand parallel to the blade axis 4 and the other in the axial direction 16 is excluded by the positive attachment.
• the fastening element 14 shown in FIG. 2 is arranged sunk in a corresponding recess 21 of the platform 8 analogously to the fastening element 14 according to FIG. 1 with its connecting plate 20, but in contrast to this is not fixed in a form-fitting manner. Rather, the connection is ⁇ plate 20 integrally connected by a number of solder bumps or soldered joints 28 between the bearing surfaces 22 with the platform. 8
• the geometry of the solder joints hereby insomnia ⁇ should be gush running all over.
• the selection of the soldering process is essentially influenced by the operating conditions at the soldering, the material pairing and the compatibility with other heat treatment requirements.
• FIG 3 shows a variant in which only a äuße ⁇ res section 30 of the fastener 14 is a separately manufactured component, the rest of the part, however, integrally molded to the platform 8 and is cast together with it ⁇ sam.
• the effectively acting as an "adapter" outer portion 30 has much like a cap for a bottle or a pipe, a skirt 32, with which it encloses the platform-side component of the Befest Whilesele ⁇ Mentes 14 at its outer end.
• the dimensioning ⁇ ments are chosen such that prior to the introduction of a joining agent results in a loose, play-afflicted seat that can be adapted to the present at the site geometric requirements and thereby compensates manufacturing tolerances and variations.
• the two components of the fastening element 14 are connected to one another by a soldering compound 36 introduced into the intermediate space 34 and subsequently solidified.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Turbine Rotor Nozzle Sealing (AREA)
• Machine Tool Units (AREA)
• External Artificial Organs (AREA)
• Primary Cells (AREA)

Priority Applications (2)

Applications Claiming Priority (3)

Publications (2)

Family

ID=37075825

Family Applications (2)

Family Applications Before (1)

Country Status (10)

Families Citing this family (8)

Family Cites Families (14)

• 2006
  • 2006-04-06 EP EP06007332A patent/EP1843009A1/fr not_active Withdrawn
• 2007
  • 2007-02-21 CN CN2007800210741A patent/CN101460709B/zh not_active Expired - Fee Related
  • 2007-02-21 JP JP2009503509A patent/JP4782225B2/ja not_active Expired - Fee Related
  • 2007-02-21 DE DE502007002816T patent/DE502007002816D1/de active Active
  • 2007-02-21 WO PCT/EP2007/051669 patent/WO2007113053A1/fr not_active Ceased
  • 2007-02-21 PL PL07704682T patent/PL2002085T3/pl unknown
  • 2007-02-21 US US12/225,933 patent/US8128357B2/en not_active Expired - Fee Related
  • 2007-02-21 AT AT07704682T patent/ATE457413T1/de active
  • 2007-02-21 ES ES07704682T patent/ES2339717T3/es active Active
  • 2007-02-21 EP EP07704682A patent/EP2002085B1/fr not_active Not-in-force
  • 2007-02-21 RU RU2008144021/06A patent/RU2421624C2/ru not_active IP Right Cessation

Non-Patent Citations (1)

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