WO2005068833A3 - Wind turbine with variable pitch blades - Google Patents

Wind turbine with variable pitch blades Download PDF

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Publication number
WO2005068833A3
WO2005068833A3 PCT/BR2005/000003 BR2005000003W WO2005068833A3 WO 2005068833 A3 WO2005068833 A3 WO 2005068833A3 BR 2005000003 W BR2005000003 W BR 2005000003W WO 2005068833 A3 WO2005068833 A3 WO 2005068833A3
Authority
WO
WIPO (PCT)
Prior art keywords
blade
blades
propeller
wind
blade position
Prior art date
Application number
PCT/BR2005/000003
Other languages
French (fr)
Other versions
WO2005068833B1 (en
WO2005068833A2 (en
Inventor
Pereira Luiz Cesar Sampaio
Original Assignee
Pereira Luiz Cesar Sampaio
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 Pereira Luiz Cesar Sampaio filed Critical Pereira Luiz Cesar Sampaio
Publication of WO2005068833A2 publication Critical patent/WO2005068833A2/en
Publication of WO2005068833A3 publication Critical patent/WO2005068833A3/en
Publication of WO2005068833B1 publication Critical patent/WO2005068833B1/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
    • 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
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/065—Rotors characterised by their construction elements
    • F03D1/0658—Arrangements for fixing wind-engaging parts to a hub
    • 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
    • F03D7/0236—Adjusting aerodynamic properties of the blades by changing the active surface of the wind engaging parts, e.g. reefing or furling
    • 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
    • F05B2250/23—Geometry three-dimensional prismatic
    • F05B2250/232—Geometry three-dimensional prismatic conical
    • 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
    • F05B2250/30—Arrangement of components
    • F05B2250/31—Arrangement of components according to the direction of their main axis or their axis of rotation
    • F05B2250/314—Arrangement of components according to the direction of their main axis or their axis of rotation the axes being inclined in relation to each other
    • 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
    • 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
    • F05B2260/78—Adjusting of angle of incidence or attack of rotating blades the adjusting mechanism driven or triggered by aerodynamic 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Landscapes

  • Engineering & Computer Science (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)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Wind Motors (AREA)

Abstract

A wind turbine (1) is provided with a system for varying the pitch of the propeller blades (7) in accordance with wind velocity, using a combination of the dynamic wind force against the blades and the centrifugal force applied to the rotating blades due to their own weight. The system controls the speed of rotation of the propeller, thus preventing security limits from being surpassed during extreme wind speeds or gusts. Each blade is so hingedly (11) mounted to the propeller hub (8) so that its longitudinal axis can describe a segment of a conical surface of which the extreme radii are accompanied by the aerodynamic profile of the blade, from a first blade position representing greater torque production efficiency to a second blade position representing a lesser torque production efficiency. The combination of the dynamic wind force against each blade and the centrifugal force acting on the blade during rotation of the propeller tends to rotate the blade towards the second blade position, overcoming, at higher speeds, a force applied by biasing means (18) associated with the blades that tends to rotate the blades back towards the first blade position.
PCT/BR2005/000003 2004-01-14 2005-01-12 Wind turbine with variable pitch blades WO2005068833A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BRPI0400041-2A BRPI0400041B1 (en) 2004-01-14 2004-01-14 variable pitch system for wind turbine blades.
BRPI0400041-2 2004-01-14

Publications (3)

Publication Number Publication Date
WO2005068833A2 WO2005068833A2 (en) 2005-07-28
WO2005068833A3 true WO2005068833A3 (en) 2005-08-25
WO2005068833B1 WO2005068833B1 (en) 2005-10-27

Family

ID=34754166

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR2005/000003 WO2005068833A2 (en) 2004-01-14 2005-01-12 Wind turbine with variable pitch blades

Country Status (2)

Country Link
BR (1) BRPI0400041B1 (en)
WO (1) WO2005068833A2 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2876423B1 (en) * 2004-10-08 2009-01-09 Bourriaud Michel Edouard Raymond WINDMILL SAILS
DK176552B1 (en) * 2005-12-29 2008-08-04 Lm Glasfiber As Variable speed nav
GB2436599A (en) * 2006-03-30 2007-10-03 Boost Energy Systems Ltd Wind turbine blade furling system
US7365448B2 (en) 2006-08-17 2008-04-29 X Blade Systems Lp Wind driven power generator
US7911076B2 (en) 2006-08-17 2011-03-22 Broadstar Developments, Lp Wind driven power generator with moveable cam
CN101600879B (en) * 2006-11-27 2012-07-18 Lm玻璃纤维有限公司 Pitch of blades on a wind power plant
FR2926335A1 (en) * 2008-01-16 2009-07-17 Pascal Gauthiez Wind energy capturing device for e.g. recharging battery in cycle, has rotor with horizontal axle and blades comprising selected and oriented bird feathers associated to brushless generator, where generator has brushless motor
FR2926609B1 (en) * 2008-01-18 2010-05-07 Pascal Gauthiez NEW TYPE OF ROTOR WITH AUTOMATICALLY ROLLABLE SAILS FOR HORIZONTAL AXIS AEROGENERATOR OF MEDIUM POWER
IT1394477B1 (en) * 2009-05-26 2012-07-05 Tozzi Nord S R L SAFETY SYSTEM FOR WIND TURBINES AND WIND TURBINE EQUIPPED WITH THIS SYSTEM
DE102013008218A1 (en) * 2013-05-14 2014-11-20 Erhard Frase Automatic mechanical rotor blade angle adjustment with overspeed protection for small wind turbines.
JP2016044632A (en) * 2014-08-26 2016-04-04 十郎 佐原 Rotational speed control device of wind power generator
CN110030156A (en) * 2017-09-25 2019-07-19 青岛兰道尔空气动力工程有限公司 Automatic pitch-controlled system with counter weight device
CN110374801B (en) * 2019-07-02 2024-04-05 中国大唐集团新能源科学技术研究院有限公司 Blade root independent variable pitch device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2516576A (en) * 1947-01-04 1950-07-25 Charles R Jacobs Self-governing wind-driven propeller
DE906440C (en) * 1948-10-02 1954-03-15 Richard Bauer Fast running wind engine
US4310284A (en) * 1979-08-27 1982-01-12 Randolph Arthur J Automatically controlled wind propeller and tower shadow eliminator
US4439108A (en) * 1982-06-08 1984-03-27 Richard Will Windmill having centrifically feathered rotors to control rotor speed
US5226805A (en) * 1990-02-16 1993-07-13 Proven Engineering Products Limited Windmill having blades which alter their pitch angles automatically in response to both wind speed and load
US5584655A (en) * 1994-12-21 1996-12-17 The Wind Turbine Company Rotor device and control for wind turbine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2516576A (en) * 1947-01-04 1950-07-25 Charles R Jacobs Self-governing wind-driven propeller
DE906440C (en) * 1948-10-02 1954-03-15 Richard Bauer Fast running wind engine
US4310284A (en) * 1979-08-27 1982-01-12 Randolph Arthur J Automatically controlled wind propeller and tower shadow eliminator
US4439108A (en) * 1982-06-08 1984-03-27 Richard Will Windmill having centrifically feathered rotors to control rotor speed
US5226805A (en) * 1990-02-16 1993-07-13 Proven Engineering Products Limited Windmill having blades which alter their pitch angles automatically in response to both wind speed and load
US5584655A (en) * 1994-12-21 1996-12-17 The Wind Turbine Company Rotor device and control for wind turbine

Also Published As

Publication number Publication date
BRPI0400041A (en) 2005-09-13
WO2005068833B1 (en) 2005-10-27
BRPI0400041B1 (en) 2010-05-18
WO2005068833A2 (en) 2005-07-28

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