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 PDFInfo
- 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
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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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)
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 |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
-
2006
- 2006-03-03 US US11/366,976 patent/US20070205603A1/en not_active Abandoned
-
2007
- 2007-03-02 WO PCT/US2007/005527 patent/WO2007103270A2/en active Application Filing
- 2007-05-03 US US11/800,254 patent/US7789624B2/en not_active Expired - Fee Related
Patent Citations (5)
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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DPE2 | Request for preliminary examination filed before expiration of 19th month from priority date (pct application filed from 20040101) | ||
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