EP1073827A1 - Aube de turbine - Google Patents

Aube de turbine

Info

Publication number
EP1073827A1
EP1073827A1 EP99937814A EP99937814A EP1073827A1 EP 1073827 A1 EP1073827 A1 EP 1073827A1 EP 99937814 A EP99937814 A EP 99937814A EP 99937814 A EP99937814 A EP 99937814A EP 1073827 A1 EP1073827 A1 EP 1073827A1
Authority
EP
European Patent Office
Prior art keywords
platform
hot gas
blade
turbine blade
load
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
EP99937814A
Other languages
German (de)
English (en)
Other versions
EP1073827B1 (fr
Inventor
Peter Tiemann
Ariel Jacala
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
Publication of EP1073827A1 publication Critical patent/EP1073827A1/fr
Application granted granted Critical
Publication of EP1073827B1 publication Critical patent/EP1073827B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • F01D5/147—Construction, i.e. structural features, e.g. of weight-saving hollow 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
    • 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
    • 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

Definitions

  • the invention relates to a cast turbine blade with an airfoil and a platform area.
  • DE 26 28 807 AI shows an impact cooling system for a gas turbine blade.
  • the gas turbine blade is directed along a blade axis and points along the
  • Blade axis on an airfoil and a platform area In the platform area, a platform extends transversely to the blade axis and radially outward away from the blade.
  • a platform forms part of a flow channel for a working fluid which flows through a gas turbine, in which the turbine blade is installed.
  • a gas turbine has very high temperatures in this flow channel.
  • the surface of the platform exposed to the hot gas is subjected to high thermal loads.
  • a perforated wall element is arranged in front of the side of the platform facing away from the hot gas. Cow air enters through the holes in the wall element and hits the side of the platform facing away from the hot gas. This achieves efficient impact cooling.
  • GB-PS 1 289 435 relates to guide elements for gas streams, in particular gas turbine showers.
  • a laminar guide element is arranged on a casting and can be cooled by a perspiration cooling system. This structure cannot be used for cast turbine blades.
  • DE 26 43 049 AI shows a cooling arrangement for cooling the platform of a turbine blade. Comparable to the arrangement of the above DE 26 28 807 AI is in front of the side of the platform facing away from the hot gas side 2 plate with openings arranged through the cooling air against the
  • the object of the invention is to provide a thermally highly resilient, cast turbine blade, in which only low thermal stresses occur in the platform area.
  • this object is achieved by a cast turbine blade directed along a blade axis and having a blade leaf and a platform area in succession along the blade axis, the platform area comprising a hot gas platform which extends transversely to the blade axis and adjoins the blade blade and a load platform opposite the hot gas platform comprises, wherein the load platform is designed to absorb forces which can be caused by a working fluid flowing around the airfoil.
  • a turbine blade is fastened over the platform area m of the turbine, in particular on the turbine housing.
  • the platform must absorb loads caused by forces acting on the airfoil. Such forces are caused by the pressure of the hot working fluid flowing through the turbine, for example a hot gas or steam. The inclusion of these loads requires that the platform have a minimum thickness in order to transmit the forces to the turbine housing without deformation.
  • the platform limits the flow channel through which a hot gas flows.
  • the invention marks a new way in the construction of the platform area of cast turbine blades: the platform area is designed as a double platform made of two opposite platforms. This ensures that the hot gas platform, which delimits the flow channel and is exposed to the hot gas, can be made thin.
  • the execution in two platforms results in a functional 3 Separation for the platforms.
  • the hot gas platform is essentially responsible for the limitation of the flow channel and thus for the channeling of the hot gas.
  • the opposite load platform which is not acted upon by the hot gas, takes over the loads caused by the forces acting on the airfoil.
  • This separation of functions enables the hot gas platform to be made so thin that the hot gas canalization is ensured without having to intercept significant forces.
  • the thin design of the hot gas platform obtained in this way has the particular advantage that comparatively low thermal stresses form in the hot gas platform.
  • the design of the platform area as a double platform is also advantageous compared to designs in which a solid platform is stiffened by ribs on the side facing away from the hot gas, since high thermal stresses can also occur at the transition points between the ribs and the platform.
  • the hot gas platform is preferably substantially thinner than the load platform. Since the hot gas platform only has to absorb a comparatively small part of the loads that occur, it can be carried out thinner than the load platform. The load platform absorbs the majority of the forces that occur.
  • the airfoil is part of a profile extending through the platform area, the hot gas platform and the load platform preferably each having an inner Ran ⁇ , via which they are connected to the profile. Furthermore, they each have an outer edge via which they are connected to one another.
  • the hot gas platform and the load platform are further preferably connected to one another only via their respective inner edge and through their respective outer edge. This results in a low connection 4 flat between the hot gas platform and the load platform.
  • connection area and the connection via the respective outer edge result in only low thermal stresses with a high mechanical stability of the double platform design.
  • Thermal expansion is relatively free due to the small number of connection points.
  • Guide elements for guiding a cooling medium to the hot gas platform are preferably arranged between the hot gas platform and the load platform.
  • Such guide elements can, for. B. be sheets that divide the space between the platforms like a chamber or z. B. also vertically directed channels between the platforms.
  • the guide elements are preferably designed with a wall thickness that is thin compared to the hot gas platform.
  • the thin design of the guide elements does not cause any significant additional thermal stresses.
  • the load platform preferably has a multiplicity of through-holes directed towards the hot gas platform.
  • a cooling medium in particular cooling air from a compressor of a gas turbine, can thus flow through the load platform and against the hot gas platform and thus cool it efficiently.
  • the turbine blade is preferably designed as a gas turbine blade, in particular for a stationary gas turbine. 5
  • the invention is explained in more detail with reference to the drawing. It shows :
  • FIG. 1 shows a perspective illustration of a part of a gas turbine blade
  • FIG. 2 shows a longitudinal section through the gas turbine blade from FIG. 1.
  • FIG. 1 shows a section of a cast gas turbine blade 1 directed along a blade axis 3 and having a profile 2.
  • the profile 2 partially forms an airfoil 5.
  • the blade area 5, which is only partially shown, is followed by a platform region 7 along the blade axis 3.
  • the profile 2 extends through the platform area 7.
  • the gas turbine blade 1 has a cavity 8 which extends continuously along the blade axis 3.
  • a stabilizing wall 6 extends along the blade axis 3 through the cavity 8 of the turbine blade 1.
  • a hot gas platform 9 belonging to the platform area 7 adjoins the blade blade 5.
  • a load platform 11 lies opposite the hot gas platform 9.
  • the hot gas platform 9 has an inner edge 13, via which it is connected to the profile 2.
  • the platform area 7 is integrally connected to the profile 2 by casting the entire gas turbine blade 1.
  • the hot gas platform 9 also has an outer edge 15 which is approximately rectangular.
  • the hot gas platform 9 is curved in the direction of the blade axis 9. This shape of the hot gas platform 9 results in a large number of similarly constructed turbine blades when installed in a turbine in the direction of flow. 6 further flow channel.
  • the load platform 11 has an inner edge 17, which is likewise delimited by the profile 2 and at the same time is the edge of an opening of the cavity 8 extending through the turbine blade 1.
  • the load platform 11 also has an approximately rectangular outer edge 19 and has approximately the same curvature as the hot gas platform 9.
  • the hot gas platform 9 has a thickness D1 and the load platform has a thickness D2. These thicknesses D1, D2 can optionally also vary within the respective platform, in which case with the thicknesses
  • Dl, D2 mean thicknesses are meant.
  • the load platform 11 and the hot gas platform 9 are connected to one another via their respective inner edges 13, 17 and the profile 2. Furthermore, the hot gas platform 9 and the load platform 11 are connected by em connecting element 29. This shows one in
  • first part 29A Area of the outer edges 15 and 19 arranged first part 29A. Furthermore, it has a second part 29B opposite the first part 29A and likewise lying in the region of the outer edges 15, 19.
  • the connecting element 29 delimits from the hot gas platform 9 two opposing holding bases 21 and 23.
  • a holding base 25 is delimited from the load platform 11.
  • the load platform 11 also has a stair-like holding base 27 opposite the holding base 25. With the help of these holding bases 21, 23, 25, 27, the turbine blade 1 n of a gas turbine, not shown, is held.
  • the hot gas platform 9 (see FIG. 2) of the hot gas platform 9 partially limits the flow path through the gas turbine. A hot working fluid flowing through the gas turbine flows around the airfoil 5.
  • FIG. 2 shows a longitudinal section through the gas turbine blade 1 of FIG. 1.
  • the stiffening wall 6 leading through the cavity 8 of the turbine blade 1 is visible.
  • the hot gas platform 9 and the load platform 11 are largely independent of each other. This would result in a separation of functions for the platforms 9, 11.
  • the hot gas platform 9 takes over the channeling of the hot working fluid and only needs to absorb a small part of the forces that are exerted on the airfoil 5 by the working fluid.
  • the hot gas platform 9 can thus be made thin. This gives the great advantage that only low thermal stresses occur in the hot gas platform 9.
  • the load platform 11 is made thicker because it absorbs the majority of the forces. However, it is protected from the hot working fluid by the hot gas platform 9, as a result of which thermal stresses hardly occur in the load platform 11 either.

Landscapes

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

Abstract

L'invention concerne une pale de turbine coulée (1), comprenant une partie pale (5) et une zone de plateforme (7), notamment une pale directrice de turbine à gaz. La zone de plateforme (7) est formée par une plateforme à gaz chaud (9) côté gaz chaud et par une plateforme de charge (11) située en face. La plateforme de charge (11) absorbe les forces de sorte que la plateforme à gaz chaud (9) peut être conçue avec une faible épaisseur. Il en résulte des contraintes thermiques particulièrement réduites.
EP99937814A 1998-04-21 1999-04-14 Aube de turbine Expired - Lifetime EP1073827B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19817820 1998-04-21
DE19817820 1998-04-21
PCT/DE1999/001109 WO1999054597A1 (fr) 1998-04-21 1999-04-14 Pale de turbine

Publications (2)

Publication Number Publication Date
EP1073827A1 true EP1073827A1 (fr) 2001-02-07
EP1073827B1 EP1073827B1 (fr) 2003-10-08

Family

ID=7865335

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99937814A Expired - Lifetime EP1073827B1 (fr) 1998-04-21 1999-04-14 Aube de turbine

Country Status (5)

Country Link
US (1) US6533544B1 (fr)
EP (1) EP1073827B1 (fr)
JP (1) JP2002512334A (fr)
DE (1) DE59907300D1 (fr)
WO (1) WO1999054597A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1557535A1 (fr) * 2004-01-20 2005-07-27 Siemens Aktiengesellschaft Aube de turbine à gaz et turbine à gaz avec une telle aube

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1099825A1 (fr) * 1999-11-12 2001-05-16 Siemens Aktiengesellschaft Aube de turbine et sa méthode de production
US6375415B1 (en) * 2000-04-25 2002-04-23 General Electric Company Hook support for a closed circuit fluid cooled gas turbine nozzle stage segment
RU2272151C2 (ru) * 2000-12-28 2006-03-20 Альстом Текнолоджи Лтд Лопатка статора осевой турбины
EP1329593B1 (fr) * 2002-01-17 2005-03-23 Siemens Aktiengesellschaft Aube de turbine ayant une plateforme supportant les gaz chaux et une plateforme supportant les charges mécaniques
EP1331361B1 (fr) * 2002-01-17 2010-05-12 Siemens Aktiengesellschaft Aube statorique de turbine coulée ayant un crochet de fixation
US7255943B2 (en) * 2003-05-14 2007-08-14 Hoya Corporation Glass substrate for a magnetic disk, magnetic disk, and methods of producing the glass substrate and the magnetic disk
JP2005108578A (ja) * 2003-09-30 2005-04-21 Hitachi Ltd 質量分析装置
EP1557534A1 (fr) 2004-01-20 2005-07-27 Siemens Aktiengesellschaft Aube de turbine à gaz et turbine à gaz avec une telle aube
US7216694B2 (en) * 2004-01-23 2007-05-15 United Technologies Corporation Apparatus and method for reducing operating stress in a turbine blade and the like
US7604456B2 (en) * 2006-04-11 2009-10-20 Siemens Energy, Inc. Vane shroud through-flow platform cover
US8210819B2 (en) * 2008-02-22 2012-07-03 Siemens Energy, Inc. Airfoil structure shim
EP2282014A1 (fr) * 2009-06-23 2011-02-09 Siemens Aktiengesellschaft Section de canal d'écoulement annulaire pour une turbomachine
US9546557B2 (en) * 2012-06-29 2017-01-17 General Electric Company Nozzle, a nozzle hanger, and a ceramic to metal attachment system
EP3008291B1 (fr) * 2013-06-10 2018-08-22 United Technologies Corporation Aube de turbine à épaisseur de paroi non uniforme

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US2500745A (en) 1944-09-21 1950-03-14 Gen Electric Bucket structure for high-temperature turbomachines
US3610769A (en) 1970-06-08 1971-10-05 Gen Motors Corp Porous facing attachment
BE794195A (fr) * 1972-01-18 1973-07-18 Bbc Sulzer Turbomaschinen Aube directrice refroidie pour des turbines a gaz
GB1605309A (en) * 1975-03-14 1989-02-01 Rolls Royce Stator blade for a gas turbine engine
IT1079131B (it) 1975-06-30 1985-05-08 Gen Electric Perfezionato raffreddamento applicabile particolarmente a elementi di turbomotori a gas
DE2643049A1 (de) 1975-10-14 1977-04-21 United Technologies Corp Schaufel mit gekuehlter plattform fuer eine stroemungsmaschine
US4283822A (en) * 1979-12-26 1981-08-18 General Electric Company Method of fabricating composite nozzles for water cooled gas turbines
US4987736A (en) * 1988-12-14 1991-01-29 General Electric Company Lightweight gas turbine engine frame with free-floating heat shield
US5076049A (en) * 1990-04-02 1991-12-31 General Electric Company Pretensioned frame
US5249418A (en) * 1991-09-16 1993-10-05 General Electric Company Gas turbine engine polygonal structural frame with axially curved panels
EP0550126A1 (fr) 1992-01-02 1993-07-07 General Electric Company Bouclier thermique pour post-combusteur
FR2707698B1 (fr) * 1993-07-15 1995-08-25 Snecma Turbomachine munie d'un moyen de soufflage d'air sur un élément de rotor.
US5396763A (en) 1994-04-25 1995-03-14 General Electric Company Cooled spraybar and flameholder assembly including a perforated hollow inner air baffle for impingement cooling an outer heat shield
JPH08135402A (ja) * 1994-11-11 1996-05-28 Mitsubishi Heavy Ind Ltd ガスタービン静翼構造

Non-Patent Citations (1)

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Title
See references of WO9954597A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1557535A1 (fr) * 2004-01-20 2005-07-27 Siemens Aktiengesellschaft Aube de turbine à gaz et turbine à gaz avec une telle aube
WO2005068786A1 (fr) * 2004-01-20 2005-07-28 Siemens Aktiengesellschaft Aube de turbine et turbine a gaz pourvue de cette aube de turbine

Also Published As

Publication number Publication date
WO1999054597A1 (fr) 1999-10-28
DE59907300D1 (de) 2003-11-13
EP1073827B1 (fr) 2003-10-08
JP2002512334A (ja) 2002-04-23
US6533544B1 (en) 2003-03-18

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