GB201223075D0 - Last stage blade design to reduce turndown vibration - Google Patents

Last stage blade design to reduce turndown vibration

Info

Publication number
GB201223075D0
GB201223075D0 GBGB1223075.1A GB201223075A GB201223075D0 GB 201223075 D0 GB201223075 D0 GB 201223075D0 GB 201223075 A GB201223075 A GB 201223075A GB 201223075 D0 GB201223075 D0 GB 201223075D0
Authority
GB
United Kingdom
Prior art keywords
turndown
vibration
reduce
last stage
blade design
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Withdrawn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
GBGB1223075.1A
Other versions
GB2498259A (en
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 GB201223075D0 publication Critical patent/GB201223075D0/en
Publication of GB2498259A publication Critical patent/GB2498259A/en
Withdrawn legal-status Critical Current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
    • F01D5/141—Shape, i.e. outer, aerodynamic form
    • F01D5/142—Shape, i.e. outer, aerodynamic form of the blades of successive rotor or stator blade-rows
    • 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
    • F01D5/141—Shape, i.e. outer, aerodynamic form
    • 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
    • F01D5/16—Form or construction for counteracting blade vibration
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/60—Efficient propulsion technologies, e.g. for aircraft

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

A turbine bucket includes a bucket airfoil having a cross-section in an airfoil shape. The bucket is twisted from a root end to a tip end. A degree of twist defines an accumulated angular offset of the tip end in a range of 10-15° relative to a tangential direction, thereby reducing excess negative incidence by 15-20° relative to the tangential direction.
GB1223075.1A 2012-01-04 2012-12-20 Last stage turbine blade design to reduce turndown vibration Withdrawn GB2498259A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13/343,369 US20130170984A1 (en) 2012-01-04 2012-01-04 Last Stage Blade Design to Reduce Turndown Vibration

Publications (2)

Publication Number Publication Date
GB201223075D0 true GB201223075D0 (en) 2013-02-06
GB2498259A GB2498259A (en) 2013-07-10

Family

ID=47682326

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1223075.1A Withdrawn GB2498259A (en) 2012-01-04 2012-12-20 Last stage turbine blade design to reduce turndown vibration

Country Status (6)

Country Link
US (1) US20130170984A1 (en)
JP (1) JP2013139778A (en)
CN (1) CN103195487A (en)
DE (1) DE102012113129A1 (en)
GB (1) GB2498259A (en)
RU (1) RU2012158343A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103470658A (en) * 2013-09-16 2013-12-25 中联重科股份有限公司 Equal-clearance brake
FR3077803B1 (en) 2018-02-15 2020-07-31 Airbus Helicopters METHOD OF IMPROVING A BLADE IN ORDER TO INCREASE ITS NEGATIVE INCIDENCE OF STALL
FR3077802B1 (en) 2018-02-15 2020-09-11 Airbus Helicopters METHOD OF DETERMINING AN INITIAL ATTACK EDGE CIRCLE OF AERODYNAMIC PROFILES OF A BLADE AND IMPROVEMENT OF THE BLADE IN ORDER TO INCREASE ITS NEGATIVE INCIDENCE OF STALL

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5160242A (en) * 1991-05-31 1992-11-03 Westinghouse Electric Corp. Freestanding mixed tuned steam turbine blade
US5277549A (en) * 1992-03-16 1994-01-11 Westinghouse Electric Corp. Controlled reaction L-2R steam turbine blade
JP3793667B2 (en) * 1999-07-09 2006-07-05 株式会社日立製作所 Method for manufacturing low-pressure steam turbine final stage rotor blade
US6574966B2 (en) * 2000-06-08 2003-06-10 Hitachi, Ltd. Gas turbine for power generation
CN2830646Y (en) * 2005-10-12 2006-10-25 哈尔滨汽轮机厂有限责任公司 Secondary-final stage vane of large-scale top speed turbine
CN2883679Y (en) * 2006-03-15 2007-03-28 哈尔滨汽轮机厂有限责任公司 Final blade of large-scale air cooling turbine
CN201103419Y (en) * 2007-12-03 2008-08-20 哈尔滨汽轮机厂有限责任公司 Second last blade of macrotype supercritical air cooling turbine
CN201581936U (en) * 2009-11-20 2010-09-15 哈尔滨汽轮机厂有限责任公司 Special last-stage vane for large-scale 60Hz turbine
CN201581934U (en) * 2009-12-21 2010-09-15 上海电气电站设备有限公司 Half-speed high-capacity nuclear turbine last-stage movable blade

Also Published As

Publication number Publication date
DE102012113129A1 (en) 2013-07-04
GB2498259A (en) 2013-07-10
JP2013139778A (en) 2013-07-18
RU2012158343A (en) 2014-07-10
US20130170984A1 (en) 2013-07-04
CN103195487A (en) 2013-07-10

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)