WO2006102719A1 - Eolienne a axe vertical - Google Patents

Eolienne a axe vertical Download PDF

Info

Publication number
WO2006102719A1
WO2006102719A1 PCT/AU2006/000434 AU2006000434W WO2006102719A1 WO 2006102719 A1 WO2006102719 A1 WO 2006102719A1 AU 2006000434 W AU2006000434 W AU 2006000434W WO 2006102719 A1 WO2006102719 A1 WO 2006102719A1
Authority
WO
WIPO (PCT)
Prior art keywords
louvres
windmill
windmill according
support structure
zone
Prior art date
Application number
PCT/AU2006/000434
Other languages
English (en)
Inventor
Edo Dol
Original Assignee
Edo Dol
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
Priority claimed from AU2005901594A external-priority patent/AU2005901594A0/en
Application filed by Edo Dol filed Critical Edo Dol
Publication of WO2006102719A1 publication Critical patent/WO2006102719A1/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
    • 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 
    • F03D7/06—Controlling wind motors  the wind motors having rotation axis substantially perpendicular to the air flow entering the rotor
    • 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
    • F05B2260/72—Adjusting of angle of incidence or attack of rotating blades by turning around an axis parallel to the rotor centre line
    • 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
    • F05B2270/00—Control
    • F05B2270/30—Control parameters, e.g. input parameters
    • F05B2270/32—Wind speeds
    • 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

  • THIS INVENTION relates to a vertical axis windmill having one or more louvres pivotally supported on a support structure that is rotatable about a vertical axis.
  • the windmill is arranged to drive a device for performing a useful work. In most cases this would be in the form of electrical power generation.
  • the average speed of the wind is insufficient to power a conventional type windmill such as a wind turbine.
  • the average wind speed to cause the windmill to operate at a satisfactory speed is about 7 meters per second (mps) or more.
  • Prior art vertical axis windmills known to the applicant require a starting mechanism to cause the windmills to start before they would continue to rotate under the power of the wind.
  • the present invention resides in a windmill having a support structure arranged to be rotatable about a vertical axis, and at least one set of louvres, each being configured with a leading edge and a trailing edge, opposed faces bounded by said edges and between opposite ends thereof, and at least one of said ends being pivotally supported by said support structure.
  • the at least one set of louvres is arranged so that in one revolution of said support structure each louvre traverses a power zone, a first change over zone, a return zone, and a second change over zone which is substantially opposite to said first change over zone.
  • the louvres of the at least one set of louvres are arranged with one of their opposed faces presented towards prevailing wind and adjacent louvres overlapping one another, and in said return zone, the louvres of the at least one set of louvres are arranged with their leading edges pointing substantially towards the prevailing wind with a gap between the adjacent louvres.
  • the louvres pivotal Iy move to respectively present said one face and said leading edge thereof towards the prevailing wind.
  • the windmill has a plurality of sets of louvres, and the plurality of sets of louvres are arranged spaced Iy about said vertical axis.
  • each said louvre has a centre axis extending through ends thereof and each louvre is pivotally supported at a point at an end or each end thereof that is spaced from the centre axis.
  • Each said louvre may have an aerofoil profile with a relative thick leading edge and a relatively thin trailing edge, and the pivot support point or points being relatively closer to said leading edge.
  • each said louvre has a speed limiting arrangement for limiting maximum speed of the windmill.
  • the speed limiting arrangement may have a counterweight or bob-weight arranged at or adjacent to said leading edge.
  • the counterweights or bob-weights in the louvres are arranged to maintain the louvres presenting their faces toward the prevailing wind for a relatively longer time when in the first and second change over zones.
  • the support structure may have one or more outwardly extending lower support arms arranged to pivotally support one end of each louvre in said at least one set of louvres.
  • the support structure may also have one or more outwardly extending upper support arms arranged to pivotally support the opposite end of each louvre in said at least one set of louvres.
  • said support arms are arranged in a pair or pairs of oppositely extending arms.
  • each said support arm has an aerofoil profile.
  • the aerofoil- profiled support arms may be arranged so that the upper support arms generate lift in an upward direction while the lower support arms generate lift in a downward direction.
  • the support structure may also have a cylindrical hub arranged radially inwardly of said louvres.
  • the hub is arranged to facilitate air flow at a relatively higher speed at the louvres and to provide a relatively higher stability of the windmill.
  • the hub may serve as the housing of a mechanism driven by the windmill to perform useful work.
  • the mechanism may be an electric generator (i.e. the windmill functioning as a turbine), or a mechanical drive.
  • the housing is arranged as a rotatable stator of the generator and the rotor is stationary.
  • the windmill may have a frame arrangement for supporting the support structure above the ground.
  • the frame arrangement may have a number of upwardly extending frame members and a cradle for supporting the support structure.
  • the cradle may have a number of spider members fixed to the support structure.
  • the spider members each having a free end arranged to engage one of the frame member.
  • a positioning arrangement is arranged to move said cradle along the frame members.
  • each said free end includes a roller arranged to movably roll along the engaged frame member.
  • the positioning arrangement may have a winch arranged to raise and lower the cradle.
  • the positioning arrangement may have a controller arranged to control operation of the positioning arrangement, and a wind sensor for sensing wind speed.
  • the sensor typically causes said controller to operate the positioning arrangement to lower the cradle when the sensor provides a signal corresponding to wind speed above a predetermined value. It is preferred that the controller also operates the positioning arrangement to raised the cradle when the sensed wind speed is below a predetermined value.
  • This windmill is self starting as wind at a relatively low speed can strike the one face of each of the louvres at the power zone to cause the windmill to turn, and as the louvres at the return zone present minimum resistance the windmill would continue to turn.
  • the windmill coupled to a generator or alternator can be designed to produce useable power at very low wind speeds such as 2 mps.
  • the windmill also has an inherent or "built-in" speed control mechanism.
  • Figure 1 is a schematic perspective view from above an embodiment of the windmill according to the present invention.
  • Figure 2 is a front view of the windmill shown in Figure 1 ;
  • Figure 3 is perspective view of the windmill shown in Figure 1 with parts of the support structure exploded;
  • Figure 4 is similar to Figure 3 with certain hidden parts revealed;
  • Figure 5 is a schematic cross-sectional view of one of the louvres;
  • Figure 6 is a schematic front view of the support structure;
  • Figure 7 is a schematic view of another embodiment of the windmill according to the present invention.
  • Figure 8 shows the cradle of the windmill shown in Figure 7.
  • the windmill 10 has a support structure 12 for supporting sets of louvres 14 and the rotor 15 of an electric generator located within its cylindrical hub 16.
  • the hub 16 in this embodiment serves as the stator of the generator.
  • the structure 12 has four (two oppositely directed pairs) upper support arms 18 extending radially outwardly from an upper ring 19, and four (two oppositely directed pairs) lower support arms 20 extending radially outwardly from a lower ring 21.
  • the rings 19 and 21 are fixed to the hub 16 by any conventional fixing means.
  • each louvre 14 has pivot pins 22 extending from its respective ends 24 and
  • the pivot pins are off centre and are closer to the leading edge 32.
  • the pins are fitted into corresponding holes in the arms 18 and 29. As such, the louvres can pivotal Iy move.
  • a shaft 36 extends through the rotor 15, and an upper fixing plate 38 and a lower fixing plate 40 are secured to respective ends of the shaft.
  • the upper fixing plate 38 extends through a hole 42 in a cover member 44.
  • each support arm 18 has one end thereof extending through the respective ring 19, 21 and are interconnected by a hollow block 46.
  • the hole 42 is in the block 46.
  • a lower hollow block 48 similar to the block 46 is used to interconnect the lower support arms 20.
  • each one of the arms 18 and 20 has an aerofoil profile and are arranged so that the top arms 28 generate lift in an upward direction (wind forced downwardly) while the lower arms 20 generate lift in the downward direction (wind forced upwardly). These arrangements serve to increase the speed of the air while being directed onto the louvers thereby further contributing to the efficiency of the turbine.
  • the windmill 10 has 4 phases or zones through which each set of louvres 14 passes during one single revolution. These zones are:
  • Each set of the louvers 14 mounted between the upper and bottom arms 18 and 28 works in combination with the cylindrical hub 16, and the arms to generate power. This is achieved by a number of different means.
  • a set of louvers 14 turn into the power zone from the frontal change over zone they are in an open position.
  • the wind then acts on the louver to cause it to close and in an overlapping relationship with an adjacent louvre. So that in combination with the other louvers in the same set they form a relatively large flat surface to the prevailing wind.
  • the drag hereby created then pushes this set of louvres around through to the rear change over zone. At that position, the louvers are forced to open by the same action which closed them in the power zone.
  • louvers are now passing through the lee or return zone. As the louvers are in an open position they offer very little resistance to the wind so that very little power is lost. Because of the aerofoil shape of the louvers, they are actually drawn forward into the wind and thereby has minimal effect to the total power output. The louvers now passes through the frontal change over zone at which time the process starts all over again.
  • the louvre 14 as shown has an aerofoil profile with a relatively convex face 28 and a relatively concave face 30. Its thickness increases progressively from the trailing edge 34 to the leading edge.
  • the pivot point 23 where a pivot pin 22 extends is about one third of the way from the leading edge 32.
  • a counter weight or bob-weight 50 is placed just inside the leading edge 32. The size of this weight will vary and will depend on the size of the windmill, the purpose for which it is being used and the desired maximum speed or RPM.
  • centrifugal force acts on this weight.
  • the centrifugal force will start to overcome the force of the wind which, in the rear change over zone and the lee or return zone would normally opens the louvers without the weight, would act on the louvers to keep them closed.
  • This acts as a self regulating mechanism and the maximum speed of the windmill can therefore be regulated by the use of these weights.
  • the louvre 14 provides an inherent or "built-in" speed control.
  • the windmill 10 in this embodiment has a frame 52 with four uprights 54, 56, 58 and 60 interconnected by a number of cross members 62, and reinforcing rods 64 connected angularly between adjacent vertically spaced cross members 42.
  • the support structure 12 is fixed to a cradle 66.
  • the cradle 66 has a rectangular shaped cage with spaced horizontal rods 68 and spaced vertical rods 70.
  • Upper spider arms 72 extend inwardly from corners of the cage to a mounting plate 74 for the plate 38 to be secured thereto.
  • lower spider arms 76 extend inwardly from corners of the cage to a mounting plate
  • the cage also carries legs 78 with a roller 80 at their ends. As shown in Figure 7, the rollers 80 ride on the uprights 54.
  • a plate 84 with a hole to receive a hook 82.
  • the hook 82 is to be attached to a chain with passes over a pulley 86 to a winch (not shown) for lifting and lowering the cradle 66.
  • Operation of the winch can be controlled by a controller arranged to receive signals from a wind sensor.
  • the controller is set to control the winch to lower the cradle 66 when the wind speed sensed by the sensor is above a preset value and to raise the cradle when the sensed wind speed is below another set value. This protects both the windmill and the tower from the excessive forces which would normally be generated at very high wind speeds and also facilitates servicing when required.
  • the tower is a square design, large enough to allow the cradle and windmill to be raised and lowered inside the tower.
  • the winch is mounted toward the bottom of the tower and is used to raise and lower the cradle and turbine using a conventional cable and pulley system.
  • the cylindrical hub16 offers the ability to house the generator.
  • the shaft would be stationary while what would generally be called the STATOR, will rotate around the stationary rotor.

Abstract

Eolienne (10) munie d'ensembles d'ouïes (14) mobiles en rotation sur une structure support (12) capable de tourner autour d'un axe vertical. Chaque ouïe est configurée avec un bord d'attaque (32) et un bord de fuite (34), et des faces opposées (28, 30) délimitées par lesdits bords et situées entre les extrémités opposées (24, 26) de ceux-ci. Les extrémités sont supportées de manière pivotante par ladite structure support. Les ouïes dans chaque ensemble sont disposées de telle sorte qu'en un tour de la structure support rotative, chaque ouïe balaie une zone de puissance, une première zone de transition, une zone de retour et une deuxième zone de transition sensiblement opposée à la première zone de transition. Dans la zone de puissance, les ouïes ont une de leurs faces opposées orientée vers le vent dominant, des ouïes adjacentes se chevauchant, et dans ladite zone de retour, les ouïes ont leurs bords d'attaque sensiblement dirigés vers le vent dominant, avec un écart entre les ouïes adjacentes. Dans les première et deuxième zones de transition, chacune des ouïes de l'ensemble pivote pour présenter respectivement une de ses faces et son bord d'attaque face au vent dominant.
PCT/AU2006/000434 2005-04-01 2006-03-31 Eolienne a axe vertical WO2006102719A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2005901594 2005-04-01
AU2005901594A AU2005901594A0 (en) 2005-04-01 A vertical axis windmill

Publications (1)

Publication Number Publication Date
WO2006102719A1 true WO2006102719A1 (fr) 2006-10-05

Family

ID=37052881

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2006/000434 WO2006102719A1 (fr) 2005-04-01 2006-03-31 Eolienne a axe vertical

Country Status (1)

Country Link
WO (1) WO2006102719A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITRE20100008A1 (it) * 2010-02-12 2011-08-13 Ernesto Franceschini Pale per la conversione di energia cinetica del vento in energia motrice fissate a un mozzo ad asse verticale.
JP2016084821A (ja) * 2016-02-19 2016-05-19 株式会社Ｃｎｏパワーソリューションズ 垂直軸型風車
JP2016114063A (ja) * 2016-02-19 2016-06-23 株式会社Ｃｎｏパワーソリューションズ 垂直軸型風車
DE102006044222B4 (de) * 2006-09-15 2019-05-23 Green Eagle Ltd. Windkraftmaschine

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US535120A (en) * 1895-03-05 Windmill
US1076713A (en) * 1912-02-07 1913-10-28 William H Southwick Air or water motor.
US2128592A (en) * 1936-09-23 1938-08-30 Michael D Mushkin Current-propelled turbine
US3743848A (en) * 1972-02-25 1973-07-03 N Strickland Wind driven power producing apparatus
FR2300910A1 (fr) * 1975-02-12 1976-09-10 Alary Patrice Dispositif destine a recueillir l'energie mecanique d'un fluide en mouvement
US4048947A (en) * 1975-01-22 1977-09-20 Charles Andre Sicard Rotary device driven by a moving fluid
GB1599653A (en) * 1977-07-20 1981-10-07 Evans F C Form of windmill
US4534703A (en) * 1983-08-30 1985-08-13 Flavell George A Wind power system
DE4123750A1 (de) * 1991-07-15 1993-01-21 Klapproth Ernst Peter Windkraftraeder mit selbstoeffnenden vertikalen windfluegel
US5256034A (en) * 1991-04-19 1993-10-26 Sultzbaugh John S Variable pitch propeller for use in conjunction with a vertical axis wind turbine
DE29812930U1 (de) * 1998-07-21 1998-11-26 Fabke Gottfried Flügelrotor

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US535120A (en) * 1895-03-05 Windmill
US1076713A (en) * 1912-02-07 1913-10-28 William H Southwick Air or water motor.
US2128592A (en) * 1936-09-23 1938-08-30 Michael D Mushkin Current-propelled turbine
US3743848A (en) * 1972-02-25 1973-07-03 N Strickland Wind driven power producing apparatus
US4048947A (en) * 1975-01-22 1977-09-20 Charles Andre Sicard Rotary device driven by a moving fluid
FR2300910A1 (fr) * 1975-02-12 1976-09-10 Alary Patrice Dispositif destine a recueillir l'energie mecanique d'un fluide en mouvement
GB1599653A (en) * 1977-07-20 1981-10-07 Evans F C Form of windmill
US4534703A (en) * 1983-08-30 1985-08-13 Flavell George A Wind power system
US5256034A (en) * 1991-04-19 1993-10-26 Sultzbaugh John S Variable pitch propeller for use in conjunction with a vertical axis wind turbine
DE4123750A1 (de) * 1991-07-15 1993-01-21 Klapproth Ernst Peter Windkraftraeder mit selbstoeffnenden vertikalen windfluegel
DE29812930U1 (de) * 1998-07-21 1998-11-26 Fabke Gottfried Flügelrotor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006044222B4 (de) * 2006-09-15 2019-05-23 Green Eagle Ltd. Windkraftmaschine
ITRE20100008A1 (it) * 2010-02-12 2011-08-13 Ernesto Franceschini Pale per la conversione di energia cinetica del vento in energia motrice fissate a un mozzo ad asse verticale.
JP2016084821A (ja) * 2016-02-19 2016-05-19 株式会社Ｃｎｏパワーソリューションズ 垂直軸型風車
JP2016114063A (ja) * 2016-02-19 2016-06-23 株式会社Ｃｎｏパワーソリューションズ 垂直軸型風車

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