WO2021165717A1 - Éolienne à deux turbines à axe horizontal assistée par came pour faibles vitesses de vent - Google Patents

Éolienne à deux turbines à axe horizontal assistée par came pour faibles vitesses de vent Download PDF

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Publication number
WO2021165717A1
WO2021165717A1 PCT/IB2020/051318 IB2020051318W WO2021165717A1 WO 2021165717 A1 WO2021165717 A1 WO 2021165717A1 IB 2020051318 W IB2020051318 W IB 2020051318W WO 2021165717 A1 WO2021165717 A1 WO 2021165717A1
Authority
WO
WIPO (PCT)
Prior art keywords
wind
louvers
cam
windmill according
blade
Prior art date
Application number
PCT/IB2020/051318
Other languages
English (en)
Inventor
Thushara Kelum WADASINGHE
Original Assignee
Wadasinghe Thushara Kelum
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 Wadasinghe Thushara Kelum filed Critical Wadasinghe Thushara Kelum
Priority to PCT/IB2020/051318 priority Critical patent/WO2021165717A1/fr
Publication of WO2021165717A1 publication Critical patent/WO2021165717A1/fr

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
    • F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor 
    • F03D3/06—Rotors
    • F03D3/062—Rotors characterised by their construction elements
    • F03D3/066—Rotors characterised by their construction elements the wind engaging parts being movable relative to the rotor
    • F03D3/067—Cyclic movements
    • F03D3/068—Cyclic movements mechanically controlled by the rotor structure
    • 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
    • F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor 
    • F03D3/002—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor  the axis being horizontal
    • 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
    • F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor 
    • F03D3/02—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor  having a plurality of rotors
    • 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
    • Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction

Definitions

  • US 8747070 B2 discloses horizontal axis wind turbine in which the blades can simultaneously rotate in a vertical axis and a horizontal axis when subjected to a wind.
  • US 20160208772 A1 discloses a propeller type wind turbine for low wind speeds.
  • a counterweight is attached to balance the forces developed, and the blades rotate in a plane parallel to the main rotor.
  • CA 2354686 A1 discloses horizontal axis wind turbine with bucket type blades designed to operate under low wind velocities. It includes a horizontal turntable frame mounted for rotation on a vertical axis. A wind rotor is fixed to the rotatable shaft and includes at least four pairs of oppositely disposed arms radiating outwardly from the rotatable shaft with one or two concave surfaced wind catching bucket mounted across between each pair of arms.
  • US 20110081243 A1 discloses helical airfoil wind turbine and claims to be an improved wind energy generator. This invention is a wind turbine that utilizes lightweight airfoils in unique designs.
  • a blade system has a plurality of blades supported in rows along the length and having a blade axis extending radially and each row being spaced around the circumference of a rotor of a wind turbine which is particularly suited for use in remote locations.
  • IN201721004140 discloses a horizontal axis wind turbine consisting of smaller, sturdier and faster blades having fixed airfoil shape and mounted on fixed shaft as stator and a set of moving blades mounted on a moving shaft.
  • the present invention is capable of overcoming many of the disadvantages in the systems in prior art. It has a very low speed threshold for operation. Having a twin turbine setup gives a substantial increase in efficiency.
  • the newly invented blade system described here will be used in each horizontal axis wind turbine.
  • the blades or wind facing elements catch the wind and transforms that energy into the rotating motion while the blades opposite to the wind create a resistance. Because of this, energy is lost by a few percentage.
  • the present invention addresses such drawbacks and deficiencies of the prior art solutions.
  • the present invention discloses a twin turbine system where the two turbines are mounted on a horizontal axis. This axel is free to rotate about a vertical axis at its midpoint.
  • the two turbines mounted on the two sides of the axel provide a gravitational balance.
  • the bucket shaped blade comprises a set of louvers. These louvers can rotate about one of the longitudinal edges.
  • the position of each louver is determined by a tie-rod, the movement of which is guided by a cam and a cam follower mechanism.
  • the cam is rigidly fixed to the axle and rotates with it.
  • the louvers When a blade is above the axle level, the louvers are in the closed position.
  • the louvers form a bucket and catches the full effect of the on-coming wind.
  • the louvers are opened using the tie-rod. This ensures that the louvers of the blades are not resisted by the wind as the wind passes through freely.
  • the present invention is a twin turbine windmill mounted on a single horizontal axle (3).
  • the axle is supported at its midpoint on a tower sufficiently high to face the wind blowing in the atmosphere.
  • a range of the height can be above 50m going up to 100m.
  • the axle is firmly mounted on a bearing assembly (2) at the top of the tower (1).
  • the axle passes through a bearing assembly (2) comprising the nacelle, and the two turbines will balance their weight as they are equally spaced from the midpoint of the axle(3).
  • each turbine has four blades.
  • Each blade comprises two side pates (11) rigidly coupled with a solid frame.
  • a number of louvers (13,14) are placed between the two side plates (11).
  • the louvers can rotate about a longitudinal edge (15) so that they can be opened or closed when needed.
  • the louvers have a slight overlap so that when they are closed, there is no leakage of air through. When the louvers are opened, air can freely pass through.
  • a yaw mechanism of prior art is used to command axle of the turbine operating system to rotate in such a direction that the blades face the maximum wind velocity direction. As a result the extraction of output power from the turbine is maximized.
  • the set of louvers is connected to each other using a tie-rod (22).
  • the movement of the tie-rod is regulated by a cam follower (24) which moves based on the angular position of the cam (23) keyed to the horizontal axle (3).
  • the cam system is so designed to ensure that the louver opening is limited to 90 degrees.
  • the louvers are in the closed position (26).
  • the cam system will open the louvers during part of the rotation. This is normally done when the blade is in the lower sector of rotation (25).
  • louvers could be installed in the turbine to keep all the louvers in the open position for some locations where excessive wind speeds are experienced.

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)
  • Wind Motors (AREA)

Abstract

La présente invention concerne les pales d'une éolienne à deux turbines à axe horizontal.
PCT/IB2020/051318 2020-02-18 2020-02-18 Éolienne à deux turbines à axe horizontal assistée par came pour faibles vitesses de vent WO2021165717A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IB2020/051318 WO2021165717A1 (fr) 2020-02-18 2020-02-18 Éolienne à deux turbines à axe horizontal assistée par came pour faibles vitesses de vent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2020/051318 WO2021165717A1 (fr) 2020-02-18 2020-02-18 Éolienne à deux turbines à axe horizontal assistée par came pour faibles vitesses de vent

Publications (1)

Publication Number Publication Date
WO2021165717A1 true WO2021165717A1 (fr) 2021-08-26

Family

ID=69903715

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2020/051318 WO2021165717A1 (fr) 2020-02-18 2020-02-18 Éolienne à deux turbines à axe horizontal assistée par came pour faibles vitesses de vent

Country Status (1)

Country Link
WO (1) WO2021165717A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19611906A1 (de) * 1996-03-26 1997-10-02 Heinz Bankroth Anstellwinkelgesteuerter Parallelrotor
CA2354686A1 (fr) 2000-08-04 2002-02-04 Victor N. Roberts Turbine eolienne a axe horizontal
US20070177977A1 (en) 2006-02-01 2007-08-02 Emshey Garry Horizontal multi-blade wind turbine
US20110081243A1 (en) 2009-10-02 2011-04-07 Sullivan John T Helical airfoil wind turbines
US20110091322A1 (en) * 2009-02-18 2011-04-21 Deeley Peter G R Opposed tilting blade, vertical axis wind turbine power generator
US8747070B2 (en) 2010-07-13 2014-06-10 Greg E Blonder Spinning horizontal axis wind turbine
WO2015102010A1 (fr) * 2014-01-01 2015-07-09 Suresh Chawla Éolienne plate à lamelles/volets
US20160208772A1 (en) 2013-08-20 2016-07-21 Emmanuil Dermitzakis Wind Turbine Of Low Wind Speeds

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19611906A1 (de) * 1996-03-26 1997-10-02 Heinz Bankroth Anstellwinkelgesteuerter Parallelrotor
CA2354686A1 (fr) 2000-08-04 2002-02-04 Victor N. Roberts Turbine eolienne a axe horizontal
US20020015639A1 (en) * 2000-08-04 2002-02-07 Roberts Victor N. Horizontal axis wind turbine
US20070177977A1 (en) 2006-02-01 2007-08-02 Emshey Garry Horizontal multi-blade wind turbine
US20110091322A1 (en) * 2009-02-18 2011-04-21 Deeley Peter G R Opposed tilting blade, vertical axis wind turbine power generator
US20110081243A1 (en) 2009-10-02 2011-04-07 Sullivan John T Helical airfoil wind turbines
US8747070B2 (en) 2010-07-13 2014-06-10 Greg E Blonder Spinning horizontal axis wind turbine
US20160208772A1 (en) 2013-08-20 2016-07-21 Emmanuil Dermitzakis Wind Turbine Of Low Wind Speeds
WO2015102010A1 (fr) * 2014-01-01 2015-07-09 Suresh Chawla Éolienne plate à lamelles/volets

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