WO2007103270A3 - Methods and devices for improving efficiency of wind turbines in low speed sites - Google Patents

Methods and devices for improving efficiency of wind turbines in low speed sites Download PDF

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Publication number
WO2007103270A3
WO2007103270A3 PCT/US2007/005527 US2007005527W WO2007103270A3 WO 2007103270 A3 WO2007103270 A3 WO 2007103270A3 US 2007005527 W US2007005527 W US 2007005527W WO 2007103270 A3 WO2007103270 A3 WO 2007103270A3
Authority
WO
WIPO (PCT)
Prior art keywords
methods
devices
low speed
wind turbines
improving efficiency
Prior art date
Application number
PCT/US2007/005527
Other languages
French (fr)
Other versions
WO2007103270B1 (en
WO2007103270A2 (en
Inventor
Suri Appa
Kari Appa
Original Assignee
Suri Appa
Kari Appa
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 Suri Appa, Kari Appa filed Critical Suri Appa
Publication of WO2007103270A2 publication Critical patent/WO2007103270A2/en
Publication of WO2007103270A3 publication Critical patent/WO2007103270A3/en
Publication of WO2007103270B1 publication Critical patent/WO2007103270B1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D7/00—Controlling wind motors 
    • F03D7/02—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/022—Adjusting aerodynamic properties of the blades
    • F03D7/0224—Adjusting blade pitch
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/60—Shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2250/00—Geometry
    • F05B2250/20—Geometry three-dimensional
    • F05B2250/28—Geometry three-dimensional patterned
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2250/00—Geometry
    • F05B2250/20—Geometry three-dimensional
    • F05B2250/28—Geometry three-dimensional patterned
    • F05B2250/281—Geometry three-dimensional patterned threaded
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
    • F05B2260/77—Adjusting of angle of incidence or attack of rotating blades the adjusting mechanism driven or triggered by centrifugal forces
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Wind Motors (AREA)

Abstract

A device for adjusting the pitch angle of a wind turbine blade comprising a spring, a camshaft, and cam grooves, wherein the pitch is adjusted for optimum starting and operating eficeincy at low speeds and adjustable for overspeed conditions.
PCT/US2007/005527 2006-03-03 2007-03-02 Methods and devices for improving efficiency of wind turbines in low speed sites WO2007103270A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/366,976 2006-03-03
US11/366,976 US20070205603A1 (en) 2006-03-03 2006-03-03 Methods and devices for improving efficiency of wind turbines in low wind speed sites

Publications (3)

Publication Number Publication Date
WO2007103270A2 WO2007103270A2 (en) 2007-09-13
WO2007103270A3 true WO2007103270A3 (en) 2007-11-29
WO2007103270B1 WO2007103270B1 (en) 2008-01-24

Family

ID=38470837

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/005527 WO2007103270A2 (en) 2006-03-03 2007-03-02 Methods and devices for improving efficiency of wind turbines in low speed sites

Country Status (2)

Country Link
US (2) US20070205603A1 (en)
WO (1) WO2007103270A2 (en)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
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DE102004007487A1 (en) * 2004-02-13 2005-09-01 Aloys Wobben Rotor blade of a wind turbine
US7939958B2 (en) * 2007-06-01 2011-05-10 Bill Todorof Direct drive wind turbine and blade assembly
DE102008007043A1 (en) * 2008-01-31 2009-08-06 Voith Patent Gmbh Freestanding, immersive power plant with an axial turbine
US8414266B2 (en) * 2008-09-26 2013-04-09 Chi Hung Louis Lam Traverse axis fluid turbine with controllable blades
WO2010059983A2 (en) 2008-11-21 2010-05-27 Preus Robert W Wind turbine
FR2946010B1 (en) * 2009-05-29 2011-06-24 Snecma FIXED CYLINDER DEVICE FOR CONTROLLING BLOWER BLADES OF A TURBOPROPULSER
US7945350B2 (en) * 2009-07-07 2011-05-17 General Electric Company Wind turbine acoustic emission control system and method
ES2345242B1 (en) * 2009-11-27 2011-08-12 Vicente Gamon Polo CONCAVA SHOVEL FOR AEROGENERATOR.
KR100989877B1 (en) * 2010-02-19 2010-10-26 이지현 Pitch control unit of wind power generation
JP4749504B1 (en) * 2010-10-14 2011-08-17 株式会社ビルメン鹿児島 Wind turbine of wind power generator and wind power generator
US8585364B2 (en) * 2011-03-21 2013-11-19 Alois J. Kosch Vertical axis wind turbine
US20130136601A1 (en) * 2011-11-25 2013-05-30 Robert Stephen Watral Large Contra-Rotating Wind Turbine
US8933576B2 (en) 2012-05-02 2015-01-13 United Technologies Corporation Hybrid friction wheel gearbox drivetrain for wind turbine applications
US9091250B2 (en) 2012-05-02 2015-07-28 United Technologies Corporation Ultra high efficiency low friction drive chain for wind turbine applications
US8598725B1 (en) 2012-06-11 2013-12-03 United Technologies Corporation Utilizing flux controllable PM electric machines for wind turbine applications
US9416771B2 (en) 2013-06-26 2016-08-16 Siemens Aktiengesellschaft Method for controlling loads in a wind turbine
US9537371B2 (en) 2014-06-09 2017-01-03 Kari Appa Contra rotor wind turbine system using a hydraulic power transmission device
US10598159B2 (en) 2016-05-06 2020-03-24 General Electric Company Wind turbine bearings
EP3497322B1 (en) 2016-08-11 2021-03-17 General Electric Company Aero-elastically tailored wind blade tip joint
AU2018338530B2 (en) * 2017-09-25 2022-09-29 Qingdao Randall Aerodynamic Engineering, Llc Pitch control system
CN108223273A (en) * 2018-01-30 2018-06-29 南京航空航天大学 A kind of adaptive elastic vane change device of Blades For Horizontal Axis Wind
CN110230572A (en) * 2019-07-02 2019-09-13 中国大唐集团新能源科学技术研究院有限公司 Wind energy conversion system independent pitch device
CN112253386A (en) * 2020-10-15 2021-01-22 华能酒泉风电有限责任公司 Wind power generation equipment and blade self-variable pitch control method, system and device thereof
CN113565582B (en) * 2021-07-08 2023-06-20 中国航发湖南动力机械研究所 Mechanical rotor over-rotation protection sensor device
US11448184B1 (en) * 2022-01-26 2022-09-20 United Arab Emirates University Self-adaptive variable twist morphing blade for wind turbine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2033342A (en) * 1934-03-16 1936-03-10 Eclipse Aviat Corp Variable pitch propeller
US3160017A (en) * 1962-01-16 1964-12-08 Weiss Joseph Switch controlling governor
US4137009A (en) * 1976-11-05 1979-01-30 Board Of Regents University Of Nevada System Pivoted blade barrel rotor wind turbine
US20030116970A1 (en) * 2001-08-20 2003-06-26 Roland Weitkamp Means for adjusting the rotor blade of a wind power plant rotor
US20030223868A1 (en) * 2002-06-04 2003-12-04 Dawson Mark H. Telescoping wind turbine blade

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US1986752A (en) * 1933-08-07 1935-01-01 Rorvik John Self-governed wind motor
US4408958A (en) * 1980-12-23 1983-10-11 The Bendix Corporation Wind turbine blade
US4495423A (en) * 1981-09-10 1985-01-22 Felt Products Mfg. Co. Wind energy conversion system
US4427897A (en) * 1982-01-18 1984-01-24 John Midyette, III Fixed pitch wind turbine system utilizing aerodynamic stall
US4952119A (en) * 1989-09-21 1990-08-28 Phoenix Industries Of Crookston Ltd. Tip brake mechanism for a wind generator blade
US5506453A (en) * 1990-02-09 1996-04-09 Mccombs; John C. Machine for converting wind energy to electrical energy
US5181678A (en) * 1991-02-04 1993-01-26 Flex Foil Technology, Inc. Flexible tailored elastic airfoil section
US5286166A (en) * 1992-05-19 1994-02-15 Steward Richard B Automatic centrifugal force variable pitch propeller
ATE257218T1 (en) * 1998-08-13 2004-01-15 Neg Micon As CONTROL DEVICE FOR ADJUSTING AND STOPPING THE BLADES OF A WIND TURBINE
US6127739A (en) * 1999-03-22 2000-10-03 Appa; Kari Jet assisted counter rotating wind turbine
FR2796671B1 (en) * 1999-07-22 2002-04-19 Jeumont Ind DEVICE FOR CAPTURING WIND ENERGY AND PRODUCING ELECTRICAL ENERGY AND METHOD FOR OPTIMIZING ENERGY PRODUCTION
DE10003385A1 (en) * 2000-01-26 2001-08-02 Aloys Wobben Wind turbine
US6278197B1 (en) * 2000-02-05 2001-08-21 Kari Appa Contra-rotating wind turbine system
KR20020016681A (en) * 2000-08-26 2002-03-06 근 석 장 Wind power energy generating device
US6492743B1 (en) * 2001-06-28 2002-12-10 Kari Appa Jet assisted hybrid wind turbine system
US7131812B2 (en) * 2002-01-18 2006-11-07 Manfred Karl Brueckner Sky turbine that is mounted on a city
US6761533B2 (en) * 2002-07-31 2004-07-13 Natus Technology Corp. Pitch governing assembly for windmills
US20040096327A1 (en) * 2002-11-14 2004-05-20 Kari Appa Method of increasing wind farm energy production
US6975045B2 (en) * 2004-03-02 2005-12-13 Mag Power Japan Kabushiki Kaisha Wind power generating system
US6945747B1 (en) * 2004-03-26 2005-09-20 Miller Willis F Dual rotor wind turbine
US20060163963A1 (en) * 2005-01-26 2006-07-27 Flores Paul Jr Counter rotating generator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2033342A (en) * 1934-03-16 1936-03-10 Eclipse Aviat Corp Variable pitch propeller
US3160017A (en) * 1962-01-16 1964-12-08 Weiss Joseph Switch controlling governor
US4137009A (en) * 1976-11-05 1979-01-30 Board Of Regents University Of Nevada System Pivoted blade barrel rotor wind turbine
US20030116970A1 (en) * 2001-08-20 2003-06-26 Roland Weitkamp Means for adjusting the rotor blade of a wind power plant rotor
US20030223868A1 (en) * 2002-06-04 2003-12-04 Dawson Mark H. Telescoping wind turbine blade

Also Published As

Publication number Publication date
US7789624B2 (en) 2010-09-07
WO2007103270B1 (en) 2008-01-24
US20070205603A1 (en) 2007-09-06
US20070207033A1 (en) 2007-09-06
WO2007103270A2 (en) 2007-09-13

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