EP2562359A2 - Système de rétention d'aubes statoriques de turbine - Google Patents

Système de rétention d'aubes statoriques de turbine Download PDF

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Publication number
EP2562359A2
EP2562359A2 EP12180006A EP12180006A EP2562359A2 EP 2562359 A2 EP2562359 A2 EP 2562359A2 EP 12180006 A EP12180006 A EP 12180006A EP 12180006 A EP12180006 A EP 12180006A EP 2562359 A2 EP2562359 A2 EP 2562359A2
Authority
EP
European Patent Office
Prior art keywords
retention system
slot
nozzle vane
turbine nozzle
vane retention
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.)
Withdrawn
Application number
EP12180006A
Other languages
German (de)
English (en)
Inventor
Thomas J. Brunt
Robert W. Coign
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of EP2562359A2 publication Critical patent/EP2562359A2/fr
Withdrawn legal-status Critical Current

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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
    • 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

Definitions

  • the present application and the resultant patent relate generally to gas turbine engines and more particularly relate to a turbine nozzle vane retention system using a retention pin about a nozzle inner platform to retain the inner platform and/or other components in case of failure.
  • thermally induced stresses may lead to cracking in the turbine nozzles. If, for example, a crack propagates through the entire length of a nozzle airfoil, the inner platform of the nozzle will no longer be retained in place. Parts of the platform and/or other components therefore may dislodge and cause catastrophic damage to the downstream flow path components.
  • the increased number of airfoils provides a certain amount of redundancy against catastrophic failure given the multiple load paths. Should a single airfoil crack and/or oxidize severely, the adjacent airfoils still may retain the inner platform in place. In a singlet design (one airfoil per segment), however, a large section of the nozzle, the airfoil, and/or the platform may dislodge if not retained at the inner and outer diameters. Moreover, the risk of damage by a singlet nozzle inner platform increases as gas turbine engine temperatures increase. Specifically, the nozzle base material generally may be unable to withstand the operating gas temperatures for long durations if the nozzle cooling delivery system is compromised.
  • Such a nozzle vane retention system should retain at least the inner platform of a singlet nozzle in the event of overall nozzle failure.
  • the present invention provides a turbine nozzle vane retention system.
  • the turbine nozzle vane retention system may include a number of nozzles with a platform, a slot extending into the platform, and a pin extending between the slot of a first nozzle and the slot of a second nozzle.
  • Fig. 1 shows a schematic view of gas turbine engine 10 as may be used herein.
  • the gas turbine engine 10 may include a compressor 15.
  • the compressor 15 compresses an incoming flow of air 20.
  • the compressor 15 delivers the compressed flow of air 20 to a combustor 25.
  • the combustor 25 mixes the compressed flow of air 20 with a compressed flow of fuel 30 and ignites the mixture to create a flow of combustion gases 35.
  • the gas turbine engine 10 may include any number of combustors 25.
  • the flow of combustion gases 35 is in turn delivered to a turbine 40.
  • the flow of combustion gases 35 drives the turbine 40 so as to produce mechanical work.
  • the mechanical work produced in the turbine 40 drives the compressor 15 via a shaft 45 and an external load 50 such as an electrical generator and the like.
  • the gas turbine engine 10 may use natural gas, various types of syngas, and/or other types of fuels.
  • the gas turbine engine 10 may be anyone of a number of different gas turbine engines offered by General Electric Company of Schenectady, New York and the like.
  • the gas turbine engine 10 may have different configurations and may use other types of components.
  • Other types of gas turbine engines also may be used herein.
  • Multiple gas turbine engines, other types of turbines, and other types of power generation equipment also may be used herein together.
  • Figs. 2 and 3 show an example of a turbine nozzle vane retention system 100 as may be described herein.
  • the turbine nozzle vane retention system 100 will be described herein in the context of a first stage 110 of the turbine 40.
  • the turbine 40 may be part of a heavy duty gas turbine engine.
  • the turbine nozzle vane retention system 100 may be applicable to many different types of turbines and components thereof.
  • the first stage 110 includes a first stage nozzle 120 and a first stage bucket 130. Any number of nozzles 120 and buckets 130 may be arranged in annular arrays in the hot gas path of the turbine 40.
  • the first stage nozzle 120 includes an outer platform 140, an inner platform 150, and an airfoil 160 therebetween. Although a singlet design 170 with only one airfoil 160 is shown, multiple airfoils 160 also may be used.
  • the outer platform 140 may be secured to a shroud 180, an outer casing, a retaining ring, and the like.
  • the inner platform 150 bears against an inner support ring 190, an inner casing, and the like. Other components and other configurations may be used herein.
  • the outer platform 140 may include one or more outer seal slots 200.
  • the inner platform 150 may include any number of inner seals slots 210.
  • the seal slots 200, 210 may be formed in the platforms 140, 150 via an EDM process (electric discharge machining) or other types of manufacturing techniques.
  • a compliant seal 220 may be positioned within the seal slots 200, 210.
  • the compliant seal 220 links adjacent nozzles 120. In the example of Fig. 4 , a first nozzle 121 and a second nozzle 122 are shown. Any number of nozzles 120 may be used. Other components and other configurations may be used herein.
  • the turbine nozzle vane retention system 100 also includes a slot 230 formed in the inner platform 150.
  • the slot 230 may extend the width of the inner platform 150.
  • a first slot 231 may be formed on a pressure side 240 of the nozzle 120 and a second slot 232 may be formed on a suction side 250 of the nozzle 120.
  • the slot 230 is shown on a forward leg 260 of the inner platform 150, but any convenient location on the inner platform 150 or elsewhere may be used.
  • the slot 230 is shown as having a circular 270 shape, but a triangular, rectangular, or any multi-faceted slot 230 may be used herein.
  • the slot 230 may have any desired size.
  • the slot 230 may be machined or cast into the inner platform 150. EDM and other types of manufacturing process also may be used herein.
  • the turbine nozzle vane retention system 100 also includes a pin 280 for positioning within the slot 230.
  • the pin 280 may be any type of rigid element with sufficient material strength so as to maintain the inner platforms 150 in position.
  • the term "pin” thus refers to any rigid linking feature that may be used herein.
  • the pin 280 also may have a circular shape 290 or any shape or size corresponding to the shape of the slot 230.
  • the pin 280 may be positioned within the slots 230 of circumferentially adjacent nozzles 120.
  • the pin 280 and the slots 230 of the turbine nozzle vane retention system 100 will transmit the gas path pressure loads to adjacent undamaged nozzles 120 so as to prevent a damaged inner platform 150 from being released into the gas path.
  • the turbine nozzle vane retention system 100 thus maintains the inner platform 150 in place until the gas turbine engine 10 is brought down for maintenance and the damaged nozzle section may be replaced.
  • the turbine nozzle vane retention system 100 thus prevents such damage and the associated downtime and replacement costs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP12180006A 2011-08-24 2012-08-10 Système de rétention d'aubes statoriques de turbine Withdrawn EP2562359A2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13/216,297 US20130052024A1 (en) 2011-08-24 2011-08-24 Turbine Nozzle Vane Retention System

Publications (1)

Publication Number Publication Date
EP2562359A2 true EP2562359A2 (fr) 2013-02-27

Family

ID=46826241

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12180006A Withdrawn EP2562359A2 (fr) 2011-08-24 2012-08-10 Système de rétention d'aubes statoriques de turbine

Country Status (3)

Country Link
US (1) US20130052024A1 (fr)
EP (1) EP2562359A2 (fr)
CN (1) CN102953769A (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9790806B2 (en) 2014-06-06 2017-10-17 United Technologies Corporation Case with vane retention feature
JP6271077B2 (ja) * 2014-07-24 2018-01-31 シーメンス アクチエンゲゼルシヤフトＳｉｅｍｅｎｓ Ａｋｔｉｅｎｇｅｓｅｌｌｓｃｈａｆｔ ガスタービンエンジン内で使用可能なステータベーンシステム
EP2998517B1 (fr) 2014-09-16 2019-03-27 Ansaldo Energia Switzerland AG Agencement d'étanchéité au niveau de l'interface entre une chambre de combustion et une turbine d'une turbine à gaz et turbine à gaz avec un tel agencement d'étanchéité
US10161266B2 (en) 2015-09-23 2018-12-25 General Electric Company Nozzle and nozzle assembly for gas turbine engine
US10378383B2 (en) 2017-01-26 2019-08-13 General Electric Company Alignment apparatus for coupling diaphragms of turbines

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2220918A (en) * 1938-08-27 1940-11-12 Gen Electric Elastic fluid turbine bucket wheel
GB725461A (en) * 1953-04-10 1955-03-02 Parsons C A & Co Ltd Improvements in and relating to the axial locking of rotor blades for turbines and the like
US3202398A (en) * 1962-11-05 1965-08-24 James E Webb Locking device for turbine rotor blades
US3904317A (en) * 1974-11-27 1975-09-09 Gen Electric Bucket locking mechanism
US4676723A (en) * 1986-03-26 1987-06-30 Westinghouse Electric Corp. Locking system for a turbine side entry blade
US4767247A (en) * 1987-02-24 1988-08-30 Westinghouse Electric Corp. Apparatus and method for preventing relative blade motion in steam turbine
US4915587A (en) * 1988-10-24 1990-04-10 Westinghouse Electric Corp. Apparatus for locking side entry blades into a rotor
US5839878A (en) * 1996-09-30 1998-11-24 United Technologies Corporation Gas turbine stator vane
US5720596A (en) * 1997-01-03 1998-02-24 Westinghouse Electric Corporation Apparatus and method for locking blades into a rotor
US7651319B2 (en) * 2002-02-22 2010-01-26 Drs Power Technology Inc. Compressor stator vane
DE10223655B3 (de) * 2002-05-28 2004-02-12 Mtu Aero Engines Gmbh Anordnung zum axialen und radialen Fixieren der Leitschaufeln eines Leitschaufelkranzes einer Gasturbine
US7575416B2 (en) * 2006-05-18 2009-08-18 United Technologies Corporation Rotor assembly for a rotary machine
US8485784B2 (en) * 2009-07-14 2013-07-16 General Electric Company Turbine bucket lockwire rotation prevention
US8496439B2 (en) * 2010-03-17 2013-07-30 Siemens Energy, Inc. Turbomachine blade locking structure including shape memory alloy

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Also Published As

Publication number Publication date
CN102953769A (zh) 2013-03-06
US20130052024A1 (en) 2013-02-28

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