US20100135802A1 - Vane structure for vertical axis wind power generator - Google Patents
Vane structure for vertical axis wind power generator Download PDFInfo
- Publication number
- US20100135802A1 US20100135802A1 US12/628,164 US62816409A US2010135802A1 US 20100135802 A1 US20100135802 A1 US 20100135802A1 US 62816409 A US62816409 A US 62816409A US 2010135802 A1 US2010135802 A1 US 2010135802A1
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- US
- United States
- Prior art keywords
- movable baffle
- guide bar
- vane
- arcuate guide
- power generator
- Prior art date
- Legal status (The legal status 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 status listed.)
- Abandoned
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- 239000000872 buffer Substances 0.000 claims description 21
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000002411 adverse Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
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- 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
- F03D3/005—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor the axis being vertical
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/141—Shape, i.e. outer, aerodynamic form
- F01D5/145—Means for influencing boundary layers or secondary circulations
-
- 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
- F03D3/061—Rotors characterised by their aerodynamic shape, e.g. aerofoil profiles
-
- 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
- F05B2240/20—Rotors
- F05B2240/21—Rotors for wind turbines
- F05B2240/211—Rotors for wind turbines with vertical axis
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- 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
- F05B2240/20—Rotors
- F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a 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
- F05B2240/00—Components
- F05B2240/20—Rotors
- F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05B2240/31—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor of changeable form or shape
- F05B2240/313—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor of changeable form or shape with adjustable flow intercepting area
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- 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
- F05B2260/30—Retaining components in desired mutual position
-
- 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
- F05B2260/50—Kinematic linkage, i.e. transmission of position
- F05B2260/502—Kinematic linkage, i.e. transmission of position involving springs
-
- 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
- F05B2260/96—Preventing, counteracting or reducing vibration or noise
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/20—Rotors
- F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/30—Retaining components in desired mutual position
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/50—Kinematic linkage, i.e. transmission of position
- F05D2260/52—Kinematic linkage, i.e. transmission of position involving springs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/96—Preventing, counteracting or reducing vibration or noise
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/01—Purpose of the control system
- F05D2270/17—Purpose of the control system to control boundary layer
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- 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
- the present invention relates to a vane structure for a vertical axis wind power generator, and more particularly to a vane for vertical axis wind power generator that includes a movable baffle unit to close or open a through hole on the vane to thereby effectively intercept the wind or reduce the air resistance to the vane, respectively.
- a vertical axis wind power generator has a vertical main shaft, on which a plurality of vanes are mounted to space from one another along a circumferential surface of the main shaft.
- Each of the vanes has a front side and a rear side that are generally two corresponding outward curved face and inward curved face, respectively.
- the inward curved face of the vane is located against the wind to intercept the flow of air currents, so that the vane is push by the wind to thereby drive the main shaft to rotate. Then, the rotating force of the main shaft is transmitted to a plurality of power generator sets for generating electric power.
- the inward curved rear face of a preceding vane is oriented toward the outward curved front face of a following vane.
- the wind blows against the inward curved rear face of one vane it also blows against the outward curved front face of another diametrically opposite vane. That is, only the wind blowing to the inward curved rear face of the vane is useful to effectively rotate the main shaft, while the wind blowing to the outward curved front face of the vane simply forms a resistance to the rotation of the main shaft.
- vanes for the conventional vertical axis wind power generator all are a complete plate without any opening formed thereon.
- the outward curved front face of the vane functions to guide the wind to outer sides of the vane to thereby reduce the air resistance thereto.
- the relatively large area of the vane would still block the wind to thereby reduce the overall push produced by the wind against the inward curved rear faces of other vanes. Since the wind force capable of driving the main shaft to rotate is reduced, the effect of wind power generation is disadvantageously reduced accordingly.
- a primary object of the present invention is to provide a vane structure for vertical axis wind power generator, which, on the one hand, reduces air resistance to a vane body and, on the other hand, allows the vane body to effectively intercept the wind for driving the main shaft to rotate.
- the vane structure for vertical axis wind power generator includes a plurality of vanes mounted around and spaced along a main shaft of the wind power generator.
- Each of the vanes includes a vane body, a first arcuate guide bar, an openwork screen, and a first movable baffle unit.
- the vane body has a body portion that defines a rearward recess, and includes a front plate portion, on which a through hole is formed.
- the first arcuate guide bar is located in the rearward recess, and having a first end and an opposing second end; the second end is fixedly connected to the body portion and the first end is located at a center of the through hole.
- the openwork screen is fitted in the through hole and connected to the first end of the first arcuate guide bar.
- the first movable baffle unit is located in the rearward recess and slidably fitted around the first arcuate guide bar, and is pivotally turnably connected to the front plate portion via a baffle support bar, such that the first movable baffle unit openably covers the openwork screen from one side adjacent to the rearward recess.
- the first movable baffle unit is blown by the wind to cover the openwork screen and accordingly closes the through hole on the front plate portion for the rearward recess of the vane body to effectively intercept the wind.
- the first movable baffle unit naturally opens the through hole on the front plate portion to reduce the air resistance to the rotation of the vane. That is, the vane of the present invention with the rearward recess located against the wind can effectively utilize the wind force without being adversely affected by an opposing vane that has a rearward recess located before the wind at the same time.
- the main shaft of the wind power generator can be more easily driven by the vanes to rotate.
- the body portion of the vane body includes a front plate portion, an upper plate portion and an opposing lower plate portion extended from an upper and a lower edge of the front plate portion, and a left plate portion and an opposing right plate portion extended from a left and a right edge of the front plate portion, such that the upper, the lower, the left, the right, and the front plate portion together define the rearward recess.
- the upper plate portion, the lower plate portion and the right plate portion are provided on respective outer surface with a plurality of parallelly and continuously arranged ridges and valleys, which are extended between a front and a rear side of the vane body.
- ridges and valleys it is able to avoid noise that is produced when the vane body is driven by the wind to rotate.
- the second end of the first arcuate guide bar is fixedly connected to the upper plate portion of the body portion, so as to locate the first arcuate guide bar in place.
- the front plate portion has an outward curved front surface, and an area of the outward curved front surface surrounding the through hole is formed into a bell-shaped sunken portion.
- the outward curved front surface can advantageously guide air currents to outer sides of the vane body, and the sunken portion can advantageously guide part of the air currents through the through hole to outer sides of the vane body.
- the openwork screen has a sleeve portion and a screen body connected to and located around the sleeve portion.
- the sleeve portion is fitted around the first end of the first arcuate guide bar, and the screen body is fixedly connected at an outer periphery thereof to an inner peripheral wall of the through hole. Therefore, the openwork screen is fitted in the through hole and supported by the first arcuate guide bar.
- the first movable baffle unit includes a first sleeve and a first movable baffle connected to and located around an end of the first sleeve.
- the first sleeve is slidably fitted around the first arcuate guide bar, and the first movable baffle normally covers the openwork screen from one side adjacent to the rearward recess.
- the first movable baffle unit openably covers the openwork screen and is supported and guided by the first arcuate guide bar to move between an opened position and a closed position to open and cover the openwork screen, respectively.
- a first buffer spring is provided between the openwork screen and the first movable baffle unit to buffer the impact of the first arcuate guide bar against the openwork screen and accordingly, avoid damaged parts and noise caused by such impact.
- a first and a second magnetic ring having the same polarity are provided on the first buffer spring and the first movable baffle unit at contact faces thereof, so that a magnetic repulsion between the two magnetic rings can further buffer the impact between the first movable baffle unit and the openwork screen.
- the vane further includes a stop unit, which includes a stop ring fixedly mounted to the first arcuate guide bar near the second end thereof, and a stop spring arranged on the first arcuate guide bar to one side of the stop ring facing toward the first end.
- the stop ring functions to limit a maximum angle by which the first movable baffle unit can be pivotally turned open. Therefore, the first movable baffle unit is protected against damage due to an exceeded open angle caused by an extremely strong wind.
- the stop spring can buffer the impact between the first movable baffle unit and the stop ring.
- the stop unit further includes a holding device, which is pivotally turnably connected to one lateral side of the stop ring.
- the holding device includes a control lever and a hook connected to the control lever.
- the first movable baffle unit is provided at positions corresponding to the control lever and the hook with a push bar and a retaining ring, respectively.
- the push bar will strike against the control lever of the holding device at the same time, bringing the control lever to pivotally turn upward and accordingly, bringing the hook to pivotally turn downward to engage with the retaining ring.
- the first movable baffle unit is held to the fully opened position, allowing the vane body to rotate at a reduced speed to avoid damaged parts of the vane due to undesirable quick rotation of the vane under extremely strong wind.
- the holding device further includes an outward projected release lever for disengaging the hook from the retaining ring.
- the vane structure for vertical axis wind power generator includes a plurality of vanes mounted around and spaced along a main shaft of the wind power generator.
- Each of the vanes includes a vane body, a first arcuate guide bar, an openwork screen, a first movable baffle unit, and a second movable baffle unit.
- the vane body has a body portion that defines a rearward recess and includes a front plate portion, on which a through hole is formed.
- the first arcuate guide bar is located in the rearward recess, and has a first end and an opposing second end. The second end is fixedly connected to the body portion and the first end is located at a center of the through hole.
- the openwork screen is fitted in the through hole and connected to the first end of the first arcuate guide bar.
- the first movable baffle unit has openings formed thereon and is located in the rearward recess of the vane body behind the openwork screen.
- the first movable baffle unit includes a second arcuate guide bar in the form of a sleeve slidably fitted around the first arcuate guide bar, and is connected to the front plate portion of the vane body via a pivot point on a baffle support bar, so that the first movable baffle unit is turnable about the pivot point to openably cover the openwork screen from one side adjacent to the rearward recess.
- the second arcuate guide bar has a proximal end and a distal end, and a radially outward extended flange formed around the distal end.
- the second movable baffle unit is located in the rearward recess of the vane body behind the first movable baffle unit, and is slidably fitted around the second arcuate guide bar to openably cover the first movable baffle unit from one side adjacent to the rearward recess.
- the first and the second movable baffle unit on the vane body are located at a closed position to cover the openwork screen and the through hole, allowing the rearward recess to effectively intercept the wind force; and when the rearward recess of the vane body is located before the wind, the first and the second movable baffle unit are naturally opened, allowing the wind to quickly move through the through hole to outer sides of the vane body without producing an increased air resistance to the rotating vane body. That is, the vane with the rearward recess located against the wind can effectively utilize the wind force without being adversely affected by an opposing vane that has the rearward recess located before the wind at the same time. Thus, the main shaft of the wind power generator can be more easily driven by the vanes to rotate.
- a second buffer spring is provided between the first and the second movable baffle unit to buffer the impact therebetween, so as to avoid damaged parts and noise caused by such impact.
- FIG. 1 is a fragmentary perspective view showing a plurality of vanes according to the present invention is mounted around and spaced along a main shaft of a wind power generator;
- FIG. 2 is an enlarged partially sectioned perspective view of the circled area A of FIG. 1 ;
- FIG. 3 is a sectioned side view of a vane structure for vertical axis wind power generator according to a first embodiment of the present invention, showing a first movable baffle thereof at a closed position;
- FIG. 4 is a sectioned side view similar to FIG. 3 with the first movable baffle at a partially opened position;
- FIG. 5 is a sectioned side view similar to FIG. 4 with the first movable baffle moved to a fully opened position and hooked thereto by a holding device, which is shown in a partially enlarged view;
- FIG. 6 is a sectioned side view of a vane structure for vertical axis wind power generator according to a second embodiment of the present invention, showing a first and a second movable baffle thereof at a closed position;
- FIG. 7 is a sectioned side view similar to FIG. 6 with the first and the second movable baffle at a partially opened position;
- FIG. 8 is a sectioned side view similar to FIG. 7 with the first and the second movable baffle moved to a fully opened position and hooked thereto by a holding device.
- FIG. 1 is a fragmentary perspective view showing a plurality of vanes according to the present invention is mounted around and spaced along a main shaft 7 of a wind power generator
- FIG. 2 is an enlarged and partially sectioned perspective view of the circled area A of FIG. 1
- FIGS. 3 to 5 are sectioned side views of one vane according to a first embodiment of the present invention.
- the vane structure for vertical axis wind power generator includes a plurality of vanes, each of which includes a vane body 1 , a first arcuate guide bar 2 , an openwork screen 3 , and a first movable baffle unit 4 .
- the vane body 1 includes a body portion 11 that defines a rearward recess 12 .
- the body portion 11 includes a front plate portion 111 , an upper plate portion 112 and an opposing lower plate portion 113 extended from an upper and a lower edge of the front plate portion 111 , and a left plate portion 114 and an opposing right plate portion 115 extended from a left and a right edge of the front portion 111 .
- the rearward recess 12 is formed between the front, the upper, the lower, the left and the right plate portion 111 , 112 , 113 , 114 , 115 to effectively intercept the flow of air currents.
- the front plate portion 111 is provided with a through hole 116 , and has an outward curved front surface 117 with an area surrounding the through hole 116 formed into a substantially bell-shaped sunken portion 118 . That is, the through hole 116 is located on the front plate portion 111 at a bottom of the sunken portion 118 .
- the first arcuate guide bar 2 is located in the rearward recess 12 , and has a first end 21 and an opposing second end 22 .
- the second end 22 is fixedly connected to a predetermined position on the body portion 11 , such as the upper plate portion 112 .
- the first end 21 is located at a center of the through hole 116 on the vane body 1 .
- the openwork screen 3 is mounted in the through hole 116 on the vane body 1 and connected to the first end 21 of the first arcuate guide bar 2 .
- the openwork screen 3 includes a sleeve portion 31 and a screen body 32 connected to and located around the sleeve portion 31 .
- the sleeve portion 31 is fitted around the first end 21 of the first arcuate guide bar 2
- the screen body 32 is fixedly connected at an outer periphery thereof to an inner peripheral wall of the through hole 116 .
- On the screen body 32 there is provided a plurality of openings 321 .
- the first movable baffle unit 4 is located in the rearward recess 12 behind the openwork screen 3 and slidably fitted around the arcuate guide bar 2 .
- the first movable baffle unit 4 is connected to the front plate portion 111 of the vane body 1 via a pivot point 411 on a baffle support bar 41 , so that the first movable baffle unit 4 is turnable about the pivot point 411 into the rearward recess 12 or toward the openwork screen 3 to openably close the through hole 116 and accordingly, the openwork screen 3 .
- the first movable baffle unit 4 includes a first sleeve 42 and a first movable baffle 43 connected to and located around an end of the first sleeve 42 .
- the first sleeve 42 is slidably fitted around the first arcuate guide bar 2 , and the first movable baffle 43 normally covers the openwork screen 3 from one side adjacent to the rearward recess 12 . That is, the first arcuate guide bar 2 is not only connected to the openwork screen 3 for supporting the same, but also functions to guide the first movable baffle unit 4 to an opened position or a closed position while firmly supporting the first movable baffle unit 4 thereon.
- the wind is no longer blocked by the opposing vane body 1 but can pass through the openings 321 on the openwork screen 3 and be guided to outer sides of the opposing vane body 1 .
- the air resistance at the opposing vane body 1 is reduced.
- a diametrically opposing vane body 1 thereof can quickly remove the air resistance at the same time to thereby eliminate any significant obstruction to the wind force by the opposing vane body 1 , allowing the vane bodies 1 to produce increased push for driving the main shaft 7 of the wind power generator to rotate.
- a first buffer spring 44 is provided between the openwork screen 3 and the first movable baffle unit 4 .
- the first buffer spring 44 functions to buffer the impact of the first movable baffle unit 4 against the openwork screen 3 and accordingly, avoid damaged parts and noise caused by such impact.
- a first magnetic ring 48 and a second magnetic ring 49 that have the same polarity are respectively provided on the first buffer spring 44 and the first movable baffle unit 4 at contact faces thereof, so that magnetic repulsion between the first and the second magnetic ring 48 , 49 further buffers the impact between the first movable baffle unit 4 and the openwork screen 3 .
- the upper plate portion 112 , the lower plate portion 113 and the right plate portion 115 are provided on respective outer surface with a plurality of parallelly and continuously arranged ridges and valleys 119 , which are extended between a front and a rear side of the vane body 1 .
- ridges and valleys 119 With these ridges and valleys 119 , it is able to avoid noise that is produced when the vane body 1 is driven by the wind force to rotate. That is, these ridges and valleys 119 provide a muffling effect.
- the vane structure of the present invention further includes a stop unit 5 , which includes a stop ring 51 and a stop spring 52 .
- the stop ring 51 is fixedly mounted to the first arcuate guide bar 2 near the second end 22
- the stop spring 52 is arranged on the first arcuate guide bar 2 to one side of the stop ring 51 facing toward the first end 21 .
- the stop ring 51 functions to limit a maximum angle by which the first movable baffle unit 4 can be pivotally turned open. Therefore, the first movable baffle unit 4 is protected against damage due to an exceeded open angle caused by an extremely strong wind, such as typhoon.
- the stop spring 52 can buffer the impact between the first movable baffle unit 4 and the stop ring 51 .
- the stop unit 5 further includes a holding device 53 , which is pivotally turnably connected to one lateral side of the stop ring 51 .
- the holding device 53 includes a control lever 531 and a hook 532 connected to the control lever 531 .
- the first movable baffle unit 4 is provided at positions corresponding to the control lever 531 and the hook 532 with a push bar 45 and a retaining ring 46 , respectively.
- the push bar 45 will strike against the control lever 531 of the holding device 53 at the same time, bringing the control lever 531 to pivotally turn upward and accordingly, bringing the hook 532 to pivotally turn downward to engage with the retaining ring 46 .
- the first movable baffle unit 4 is held to the fully opened position, allowing the vane body 1 to rotate at a reduced speed and avoid damaged parts of the vane due to undesirable quick rotation under extremely strong wind.
- the holding device 53 also includes an outward projected release lever 533 .
- the release lever 533 can be pulled to disengage the hook 532 from the retaining ring 46 .
- the first movable baffle unit 4 is not bound to the stop unit 5 but can freely pivotally turn between the fully opened position and the fully closed position in response to different wind directions to open or close the openwork screen 3 .
- a steel cable 8 is extended between and connected to the upper plate portion 112 of each of the vane bodies 1 and the main shaft 7 , and any two adjacent vane bodies 1 , as can be seen in FIG. 1 .
- FIGS. 6 , 7 and 8 are sectioned side views of a vane structure for vertical axis wind power generator according to a second embodiment of the present invention.
- the second embodiment is generally structurally similar to the first embodiment, except for a second movable baffle unit 6 for openably covering the first movable baffle unit 4 .
- the vane structure according to the second embodiment of the present invention includes two overlapping movable baffle units to reduce the air resistance as quick as possible when the outward curved front surface of the vane faces against the wind.
- the first movable baffle unit 4 has openings formed thereon, and is located in the rearward recess 12 of the vane body 1 behind the openwork screen 3 .
- the first movable baffle unit 4 includes a second arcuate guide bar 47 , which is in the form of a sleeve slidably fitted around the first arcuate guide bar 2 .
- the first movable baffle unit 4 is connected to the front plate portion 111 of the vane body 1 via a pivot point 411 on a baffle support bar 41 , so that the first movable baffle unit 4 is turnable about the pivot point 411 into the rearward recess 12 or toward the openwork screen 3 to openably close the through hole 116 .
- the second arcuate guide bar 47 has a proximal end 471 and a distal end 472 , and a radially outward extended flange 473 is formed around the distal end 472 .
- the first movable baffle unit 4 includes a first sleeve 42 located around the proximal end 471 of the second arcuate guide bar 47 , and a first movable baffle 43 connected to and located around an end of the first sleeve 42 .
- the first movable baffle 43 normally covers the openwork screen 3 from one side adjacent to the rearward recess 12 , and is provided with a plurality of openings 431 .
- the second movable baffle unit 6 is located in the rearward recess 12 of the vane body 1 and slidably fitted around the second arcuate guide bar 47 .
- the second movable baffle unit 6 normally openably covers the first movable baffle unit 4 from one side adjacent to the rearward recess 12 .
- the second movable baffle unit 6 includes a second sleeve 61 and a second movable baffle 62 connected to and located around the second sleeve 61 .
- the second sleeve 61 is slidably fitted around the second arcuate guide bar 47 , and the second movable baffle 62 normally closes the openings 431 on the first movable baffle unit 4 from one side adjacent to the rearward recess 12 .
- the second movable baffle unit 6 is blown by the wind toward the first movable baffle unit 4 to close the openings 431 , and the first movable baffle unit 4 is also blown by the wind toward the openwork screen 3 to close the openings 321 , making the whole vane body 1 a complete plate without any opening.
- the rearward recess 12 can effectively intercept the wind to thereby drive the main shaft 7 to rotate.
- the wind passes through the openings 431 on the first movable baffle unit 4 to act on the second movable baffle unit 6 , bringing the second movable baffle unit 6 to move away from the first movable baffle unit 4 while sliding along the second arcuate guide bar 47 .
- the wind is no longer blocked by the opposing vane body 1 but can pass through the openings 321 on the openwork screen 3 and the openings 431 on the first movable baffle unit 4 to be guided to outer sides of the opposing vane body 1 .
- the air resistance at the opposing vane body 1 is reduced.
- a second buffer spring 63 is provided between the first movable baffle unit 4 and the second movable baffle unit 6 .
- the second buffer spring 63 functions to buffer the impact of the second movable baffle unit 6 against the first movable baffle unit 4 . Therefore, damaged parts and noise caused by such impact can be avoided.
- a stop unit 5 is provided on the first arcuate guide bar 2 near the second end 22 thereof.
- the stop unit 5 includes a stop ring 51 and a stop spring 52 , which provide the same functions as in the first embodiment.
- the stop unit 5 further includes a holding device 53 , which is pivotally turnably connected to one lateral side of the stop ring 51 .
- the holding device 53 includes a control lever 531 and a hook 532 .
- the push bar 45 and the retaining ring 46 corresponding to the control lever 531 and the hook 532 are provided on the flange 473 of the second arcuate guide bar 47 of the first movable baffle unit 4 .
- first movable baffle unit 4 and the second movable baffle unit 6 When the first movable baffle unit 4 and the second movable baffle unit 6 are blown open by a strong wind, they can still be held to the stop unit 5 through engagement of the hook 532 of the holding device 53 with the retaining ring 46 , just the same as in the first embodiment.
- the holding device 53 further includes an outward projected release lever 533 , which can be pulled to release the hook 532 from the retaining ring 46 .
- the movable baffle unit or units 4 , 6 on the vane body 1 are located at a closed position to close the openwork screen 3 and the through hole 116 , allowing the rearward recess 12 to effectively intercept the wind force; and when the rearward recess 12 of the vane body 1 is located before the wind, the movable baffle unit or units 4 , 6 are naturally moved to an opened position, allowing the wind to quickly move through the through hole 116 on the vane body 1 to outer sides of the vane body 1 without producing an increased air resistance to the rotating vane body 1 .
- the movable baffle units 4 , 6 are supported and guided by the arcuate guide bars 2 , 47 while they are blown to the closed position or the opened position, the movable baffle units 4 , 6 can maintain firm structure and stable operation. Moreover, with the stop unit 5 , the vane body 1 can be protected against exceeded turning angle under strong wind, and accordingly, the whole vane structure and the wind power generator are protected against damage possibly caused by the excessively turned vane body 1 .
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Abstract
A vane for vertical axis wind power generator includes a vane body defining a rearward recess and having a front plate portion with a through hole; a first arcuate guide bar located in the recess with a second end connected to the vane body and a first end located in the through hole; an openwork screen fitted in the through hole and connected to the first end of the first arcuate guide bar; and a first movable baffle unit slidably fitted around the first arcuate guide bar and pivotally connected to the vane body to openably cover the openwork screen. When the rearward recess is against the wind, the first movable baffle unit covers the openwork screen for the rearward recess to effectively intercept the wind. When the rearward recess is before the wind, the first movable baffle unit naturally opens to reduce the air resistance to the vane.
Description
- This application claims priority to China Application Serial Number 200810180782.6, filed Dec. 2, 2008, which is herein incorporated by reference.
- The present invention relates to a vane structure for a vertical axis wind power generator, and more particularly to a vane for vertical axis wind power generator that includes a movable baffle unit to close or open a through hole on the vane to thereby effectively intercept the wind or reduce the air resistance to the vane, respectively.
- A vertical axis wind power generator has a vertical main shaft, on which a plurality of vanes are mounted to space from one another along a circumferential surface of the main shaft. Each of the vanes has a front side and a rear side that are generally two corresponding outward curved face and inward curved face, respectively. The inward curved face of the vane is located against the wind to intercept the flow of air currents, so that the vane is push by the wind to thereby drive the main shaft to rotate. Then, the rotating force of the main shaft is transmitted to a plurality of power generator sets for generating electric power.
- Since the vanes of the vertical axis wind power generator are sequentially circumferentially spaced around the main shaft, the inward curved rear face of a preceding vane is oriented toward the outward curved front face of a following vane. When the wind blows against the inward curved rear face of one vane, it also blows against the outward curved front face of another diametrically opposite vane. That is, only the wind blowing to the inward curved rear face of the vane is useful to effectively rotate the main shaft, while the wind blowing to the outward curved front face of the vane simply forms a resistance to the rotation of the main shaft.
- It is noted the vanes for the conventional vertical axis wind power generator all are a complete plate without any opening formed thereon. When the wind blows to the outward curved front face of the vane, the outward curved front face functions to guide the wind to outer sides of the vane to thereby reduce the air resistance thereto. Nevertheless, the relatively large area of the vane would still block the wind to thereby reduce the overall push produced by the wind against the inward curved rear faces of other vanes. Since the wind force capable of driving the main shaft to rotate is reduced, the effect of wind power generation is disadvantageously reduced accordingly.
- A primary object of the present invention is to provide a vane structure for vertical axis wind power generator, which, on the one hand, reduces air resistance to a vane body and, on the other hand, allows the vane body to effectively intercept the wind for driving the main shaft to rotate.
- To achieve the above and other objects, the vane structure for vertical axis wind power generator according to a preferred embodiment of the present invention includes a plurality of vanes mounted around and spaced along a main shaft of the wind power generator. Each of the vanes includes a vane body, a first arcuate guide bar, an openwork screen, and a first movable baffle unit. The vane body has a body portion that defines a rearward recess, and includes a front plate portion, on which a through hole is formed. The first arcuate guide bar is located in the rearward recess, and having a first end and an opposing second end; the second end is fixedly connected to the body portion and the first end is located at a center of the through hole. The openwork screen is fitted in the through hole and connected to the first end of the first arcuate guide bar. The first movable baffle unit is located in the rearward recess and slidably fitted around the first arcuate guide bar, and is pivotally turnably connected to the front plate portion via a baffle support bar, such that the first movable baffle unit openably covers the openwork screen from one side adjacent to the rearward recess. When the rearward recess of the vane is located against the wind, the first movable baffle unit is blown by the wind to cover the openwork screen and accordingly closes the through hole on the front plate portion for the rearward recess of the vane body to effectively intercept the wind. On the other hand, when the rearward recess of the vane is located before the wind, the first movable baffle unit naturally opens the through hole on the front plate portion to reduce the air resistance to the rotation of the vane. That is, the vane of the present invention with the rearward recess located against the wind can effectively utilize the wind force without being adversely affected by an opposing vane that has a rearward recess located before the wind at the same time. Thus, the main shaft of the wind power generator can be more easily driven by the vanes to rotate.
- Preferably, the body portion of the vane body includes a front plate portion, an upper plate portion and an opposing lower plate portion extended from an upper and a lower edge of the front plate portion, and a left plate portion and an opposing right plate portion extended from a left and a right edge of the front plate portion, such that the upper, the lower, the left, the right, and the front plate portion together define the rearward recess.
- Preferably, the upper plate portion, the lower plate portion and the right plate portion are provided on respective outer surface with a plurality of parallelly and continuously arranged ridges and valleys, which are extended between a front and a rear side of the vane body. With these ridges and valleys, it is able to avoid noise that is produced when the vane body is driven by the wind to rotate.
- Preferably, the second end of the first arcuate guide bar is fixedly connected to the upper plate portion of the body portion, so as to locate the first arcuate guide bar in place.
- Preferably, the front plate portion has an outward curved front surface, and an area of the outward curved front surface surrounding the through hole is formed into a bell-shaped sunken portion. The outward curved front surface can advantageously guide air currents to outer sides of the vane body, and the sunken portion can advantageously guide part of the air currents through the through hole to outer sides of the vane body.
- Preferably, the openwork screen has a sleeve portion and a screen body connected to and located around the sleeve portion. The sleeve portion is fitted around the first end of the first arcuate guide bar, and the screen body is fixedly connected at an outer periphery thereof to an inner peripheral wall of the through hole. Therefore, the openwork screen is fitted in the through hole and supported by the first arcuate guide bar.
- Preferably, the first movable baffle unit includes a first sleeve and a first movable baffle connected to and located around an end of the first sleeve. The first sleeve is slidably fitted around the first arcuate guide bar, and the first movable baffle normally covers the openwork screen from one side adjacent to the rearward recess. Thus, the first movable baffle unit openably covers the openwork screen and is supported and guided by the first arcuate guide bar to move between an opened position and a closed position to open and cover the openwork screen, respectively.
- Preferably, a first buffer spring is provided between the openwork screen and the first movable baffle unit to buffer the impact of the first arcuate guide bar against the openwork screen and accordingly, avoid damaged parts and noise caused by such impact.
- Preferably, a first and a second magnetic ring having the same polarity are provided on the first buffer spring and the first movable baffle unit at contact faces thereof, so that a magnetic repulsion between the two magnetic rings can further buffer the impact between the first movable baffle unit and the openwork screen.
- Preferably, the vane further includes a stop unit, which includes a stop ring fixedly mounted to the first arcuate guide bar near the second end thereof, and a stop spring arranged on the first arcuate guide bar to one side of the stop ring facing toward the first end. The stop ring functions to limit a maximum angle by which the first movable baffle unit can be pivotally turned open. Therefore, the first movable baffle unit is protected against damage due to an exceeded open angle caused by an extremely strong wind. The stop spring can buffer the impact between the first movable baffle unit and the stop ring.
- Preferably, the stop unit further includes a holding device, which is pivotally turnably connected to one lateral side of the stop ring. The holding device includes a control lever and a hook connected to the control lever. And, the first movable baffle unit is provided at positions corresponding to the control lever and the hook with a push bar and a retaining ring, respectively. When the first movable baffle unit is blown open by a strong wind and stopped by the stop ring from turning any further, the push bar will strike against the control lever of the holding device at the same time, bringing the control lever to pivotally turn upward and accordingly, bringing the hook to pivotally turn downward to engage with the retaining ring. Thus, the first movable baffle unit is held to the fully opened position, allowing the vane body to rotate at a reduced speed to avoid damaged parts of the vane due to undesirable quick rotation of the vane under extremely strong wind.
- Preferably, the holding device further includes an outward projected release lever for disengaging the hook from the retaining ring.
- To achieve the above and other objects, the vane structure for vertical axis wind power generator according to another preferred embodiment of the present invention includes a plurality of vanes mounted around and spaced along a main shaft of the wind power generator. Each of the vanes includes a vane body, a first arcuate guide bar, an openwork screen, a first movable baffle unit, and a second movable baffle unit. The vane body has a body portion that defines a rearward recess and includes a front plate portion, on which a through hole is formed. The first arcuate guide bar is located in the rearward recess, and has a first end and an opposing second end. The second end is fixedly connected to the body portion and the first end is located at a center of the through hole. The openwork screen is fitted in the through hole and connected to the first end of the first arcuate guide bar. The first movable baffle unit has openings formed thereon and is located in the rearward recess of the vane body behind the openwork screen. The first movable baffle unit includes a second arcuate guide bar in the form of a sleeve slidably fitted around the first arcuate guide bar, and is connected to the front plate portion of the vane body via a pivot point on a baffle support bar, so that the first movable baffle unit is turnable about the pivot point to openably cover the openwork screen from one side adjacent to the rearward recess. The second arcuate guide bar has a proximal end and a distal end, and a radially outward extended flange formed around the distal end. The second movable baffle unit is located in the rearward recess of the vane body behind the first movable baffle unit, and is slidably fitted around the second arcuate guide bar to openably cover the first movable baffle unit from one side adjacent to the rearward recess. When the rearward recess of the vane body is located against the wind, the first and the second movable baffle unit on the vane body are located at a closed position to cover the openwork screen and the through hole, allowing the rearward recess to effectively intercept the wind force; and when the rearward recess of the vane body is located before the wind, the first and the second movable baffle unit are naturally opened, allowing the wind to quickly move through the through hole to outer sides of the vane body without producing an increased air resistance to the rotating vane body. That is, the vane with the rearward recess located against the wind can effectively utilize the wind force without being adversely affected by an opposing vane that has the rearward recess located before the wind at the same time. Thus, the main shaft of the wind power generator can be more easily driven by the vanes to rotate.
- Preferably, a second buffer spring is provided between the first and the second movable baffle unit to buffer the impact therebetween, so as to avoid damaged parts and noise caused by such impact.
- The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein
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FIG. 1 is a fragmentary perspective view showing a plurality of vanes according to the present invention is mounted around and spaced along a main shaft of a wind power generator; -
FIG. 2 is an enlarged partially sectioned perspective view of the circled area A ofFIG. 1 ; -
FIG. 3 is a sectioned side view of a vane structure for vertical axis wind power generator according to a first embodiment of the present invention, showing a first movable baffle thereof at a closed position; -
FIG. 4 is a sectioned side view similar toFIG. 3 with the first movable baffle at a partially opened position; -
FIG. 5 is a sectioned side view similar toFIG. 4 with the first movable baffle moved to a fully opened position and hooked thereto by a holding device, which is shown in a partially enlarged view; -
FIG. 6 is a sectioned side view of a vane structure for vertical axis wind power generator according to a second embodiment of the present invention, showing a first and a second movable baffle thereof at a closed position; -
FIG. 7 is a sectioned side view similar toFIG. 6 with the first and the second movable baffle at a partially opened position; and -
FIG. 8 is a sectioned side view similar toFIG. 7 with the first and the second movable baffle moved to a fully opened position and hooked thereto by a holding device. - The present invention will now be described with two preferred embodiments thereof. For the purpose of easy to understand, elements that are the same in the two preferred embodiments are denoted by the same reference numerals.
- Please refer to
FIG. 1 that is a fragmentary perspective view showing a plurality of vanes according to the present invention is mounted around and spaced along amain shaft 7 of a wind power generator, and toFIG. 2 that is an enlarged and partially sectioned perspective view of the circled area A ofFIG. 1 , and toFIGS. 3 to 5 that are sectioned side views of one vane according to a first embodiment of the present invention. - As shown, the vane structure for vertical axis wind power generator according to the first embodiment of the present invention includes a plurality of vanes, each of which includes a
vane body 1, a firstarcuate guide bar 2, anopenwork screen 3, and a firstmovable baffle unit 4. - The
vane body 1 includes abody portion 11 that defines arearward recess 12. In practical implementation, thebody portion 11 includes afront plate portion 111, anupper plate portion 112 and an opposinglower plate portion 113 extended from an upper and a lower edge of thefront plate portion 111, and aleft plate portion 114 and an opposingright plate portion 115 extended from a left and a right edge of thefront portion 111. Therearward recess 12 is formed between the front, the upper, the lower, the left and theright plate portion - The
front plate portion 111 is provided with a throughhole 116, and has an outward curvedfront surface 117 with an area surrounding the throughhole 116 formed into a substantially bell-shapedsunken portion 118. That is, the throughhole 116 is located on thefront plate portion 111 at a bottom of thesunken portion 118. - The first
arcuate guide bar 2 is located in therearward recess 12, and has afirst end 21 and an opposingsecond end 22. Thesecond end 22 is fixedly connected to a predetermined position on thebody portion 11, such as theupper plate portion 112. Thefirst end 21 is located at a center of the throughhole 116 on thevane body 1. - The
openwork screen 3 is mounted in the throughhole 116 on thevane body 1 and connected to thefirst end 21 of the firstarcuate guide bar 2. In practical implementation, theopenwork screen 3 includes asleeve portion 31 and ascreen body 32 connected to and located around thesleeve portion 31. Thesleeve portion 31 is fitted around thefirst end 21 of the firstarcuate guide bar 2, and thescreen body 32 is fixedly connected at an outer periphery thereof to an inner peripheral wall of the throughhole 116. On thescreen body 32, there is provided a plurality ofopenings 321. With the above arrangements, theopenwork screen 3 is fitted in the throughhole 116. - The first
movable baffle unit 4 is located in therearward recess 12 behind theopenwork screen 3 and slidably fitted around thearcuate guide bar 2. The firstmovable baffle unit 4 is connected to thefront plate portion 111 of thevane body 1 via apivot point 411 on abaffle support bar 41, so that the firstmovable baffle unit 4 is turnable about thepivot point 411 into therearward recess 12 or toward theopenwork screen 3 to openably close the throughhole 116 and accordingly, theopenwork screen 3. In practical implementation, the firstmovable baffle unit 4 includes afirst sleeve 42 and a firstmovable baffle 43 connected to and located around an end of thefirst sleeve 42. Thefirst sleeve 42 is slidably fitted around the firstarcuate guide bar 2, and the firstmovable baffle 43 normally covers theopenwork screen 3 from one side adjacent to therearward recess 12. That is, the firstarcuate guide bar 2 is not only connected to theopenwork screen 3 for supporting the same, but also functions to guide the firstmovable baffle unit 4 to an opened position or a closed position while firmly supporting the firstmovable baffle unit 4 thereon. - As can be seen from
FIG. 3 , when the wind blows against thevane body 1 from the side with therearward recess 12, the firstmovable baffle unit 4 is blown toward theopenwork screen 3 to thereby close theopenings 321 on theopenwork screen 3, allowing therearward recess 12 of thevane body 1 to effectively intercept the wind for driving themain shaft 7 to rotate. - While the wind blows against the
rearward recess 12 of the above-mentionedvane body 1, it also blows against the outward curvedfront surface 117 of thefront plate portion 111 of a diametrically opposingvane body 1, as shown inFIG. 4 . At this point, while some part of the air currents of the wind is guided by the outward curvedfront surface 117 toward outer sides of the opposingvane body 1, other part of the air currents of the wind acting on thefront plate portion 111 is guided into thesunken portion 118 to pass through theopenings 321 on theopenwork screen 3 and blow against the firstmovable baffle unit 4, bringing the firstmovable baffle unit 4 to turn about thepivot point 411 of thebaffle support bar 41 while being guided by the firstarcuate guide bar 2 to move away from theopenwork screen 3 to open the throughhole 116. At this point, with the throughhole 116 on the opposingvane body 1 in an opened state, the wind is no longer blocked by the opposingvane body 1 but can pass through theopenings 321 on theopenwork screen 3 and be guided to outer sides of the opposingvane body 1. As a result, the air resistance at the opposingvane body 1 is reduced. - Thus, according to the vane structure of the present invention, when the wind force acts on the
rearward recess 12 of one of thevane bodies 2 on themain shaft 7 of the vertical axis wind power generator, a diametrically opposingvane body 1 thereof can quickly remove the air resistance at the same time to thereby eliminate any significant obstruction to the wind force by the opposingvane body 1, allowing thevane bodies 1 to produce increased push for driving themain shaft 7 of the wind power generator to rotate. - A
first buffer spring 44 is provided between theopenwork screen 3 and the firstmovable baffle unit 4. When the firstmovable baffle unit 4 is turned toward theopenwork screen 3 to close the same, thefirst buffer spring 44 functions to buffer the impact of the firstmovable baffle unit 4 against theopenwork screen 3 and accordingly, avoid damaged parts and noise caused by such impact. Further, a firstmagnetic ring 48 and a secondmagnetic ring 49 that have the same polarity are respectively provided on thefirst buffer spring 44 and the firstmovable baffle unit 4 at contact faces thereof, so that magnetic repulsion between the first and the secondmagnetic ring movable baffle unit 4 and theopenwork screen 3. - The
upper plate portion 112, thelower plate portion 113 and theright plate portion 115 are provided on respective outer surface with a plurality of parallelly and continuously arranged ridges andvalleys 119, which are extended between a front and a rear side of thevane body 1. With these ridges andvalleys 119, it is able to avoid noise that is produced when thevane body 1 is driven by the wind force to rotate. That is, these ridges andvalleys 119 provide a muffling effect. - Please refer to
FIGS. 3 to 5 , particularlyFIG. 5 . The vane structure of the present invention further includes astop unit 5, which includes astop ring 51 and astop spring 52. Thestop ring 51 is fixedly mounted to the firstarcuate guide bar 2 near thesecond end 22, and thestop spring 52 is arranged on the firstarcuate guide bar 2 to one side of thestop ring 51 facing toward thefirst end 21. Thestop ring 51 functions to limit a maximum angle by which the firstmovable baffle unit 4 can be pivotally turned open. Therefore, the firstmovable baffle unit 4 is protected against damage due to an exceeded open angle caused by an extremely strong wind, such as typhoon. Thestop spring 52 can buffer the impact between the firstmovable baffle unit 4 and thestop ring 51. - The
stop unit 5 further includes a holdingdevice 53, which is pivotally turnably connected to one lateral side of thestop ring 51. The holdingdevice 53 includes acontrol lever 531 and ahook 532 connected to thecontrol lever 531. And, the firstmovable baffle unit 4 is provided at positions corresponding to thecontrol lever 531 and thehook 532 with apush bar 45 and a retainingring 46, respectively. When the firstmovable baffle unit 4 is blown open by a strong wind and stopped by thestop ring 51 from turning any further, thepush bar 45 will strike against thecontrol lever 531 of the holdingdevice 53 at the same time, bringing thecontrol lever 531 to pivotally turn upward and accordingly, bringing thehook 532 to pivotally turn downward to engage with the retainingring 46. Thus, the firstmovable baffle unit 4 is held to the fully opened position, allowing thevane body 1 to rotate at a reduced speed and avoid damaged parts of the vane due to undesirable quick rotation under extremely strong wind. - The holding
device 53 also includes an outward projectedrelease lever 533. When the strong wind is no longer a problem, therelease lever 533 can be pulled to disengage thehook 532 from the retainingring 46. At this point, the firstmovable baffle unit 4 is not bound to thestop unit 5 but can freely pivotally turn between the fully opened position and the fully closed position in response to different wind directions to open or close theopenwork screen 3. - To ensure stable rotation of the vanes, a
steel cable 8 is extended between and connected to theupper plate portion 112 of each of thevane bodies 1 and themain shaft 7, and any twoadjacent vane bodies 1, as can be seen inFIG. 1 . -
FIGS. 6 , 7 and 8 are sectioned side views of a vane structure for vertical axis wind power generator according to a second embodiment of the present invention. The second embodiment is generally structurally similar to the first embodiment, except for a secondmovable baffle unit 6 for openably covering the firstmovable baffle unit 4. That is, the vane structure according to the second embodiment of the present invention includes two overlapping movable baffle units to reduce the air resistance as quick as possible when the outward curved front surface of the vane faces against the wind. - The portions of second embodiment that are different from the first embodiment will now be described in more details. In the second embodiment, the first
movable baffle unit 4 has openings formed thereon, and is located in therearward recess 12 of thevane body 1 behind theopenwork screen 3. The firstmovable baffle unit 4 includes a secondarcuate guide bar 47, which is in the form of a sleeve slidably fitted around the firstarcuate guide bar 2. As in the first embodiment, the firstmovable baffle unit 4 is connected to thefront plate portion 111 of thevane body 1 via apivot point 411 on abaffle support bar 41, so that the firstmovable baffle unit 4 is turnable about thepivot point 411 into therearward recess 12 or toward theopenwork screen 3 to openably close the throughhole 116. As can be seen inFIG. 6 , the secondarcuate guide bar 47 has aproximal end 471 and adistal end 472, and a radially outward extendedflange 473 is formed around thedistal end 472. - In practical implementation, the first
movable baffle unit 4 includes afirst sleeve 42 located around theproximal end 471 of the secondarcuate guide bar 47, and a firstmovable baffle 43 connected to and located around an end of thefirst sleeve 42. The firstmovable baffle 43 normally covers theopenwork screen 3 from one side adjacent to therearward recess 12, and is provided with a plurality ofopenings 431. - The second
movable baffle unit 6 is located in therearward recess 12 of thevane body 1 and slidably fitted around the secondarcuate guide bar 47. The secondmovable baffle unit 6 normally openably covers the firstmovable baffle unit 4 from one side adjacent to therearward recess 12. In practical implementation, the secondmovable baffle unit 6 includes asecond sleeve 61 and a secondmovable baffle 62 connected to and located around thesecond sleeve 61. Thesecond sleeve 61 is slidably fitted around the secondarcuate guide bar 47, and the secondmovable baffle 62 normally closes theopenings 431 on the firstmovable baffle unit 4 from one side adjacent to therearward recess 12. - As shown in
FIG. 6 , when therearward recess 12 on thevane body 1 is located against the wind, the secondmovable baffle unit 6 is blown by the wind toward the firstmovable baffle unit 4 to close theopenings 431, and the firstmovable baffle unit 4 is also blown by the wind toward theopenwork screen 3 to close theopenings 321, making the whole vane body 1 a complete plate without any opening. At this point, therearward recess 12 can effectively intercept the wind to thereby drive themain shaft 7 to rotate. - Please refer to
FIG. 7 . While the wind blows against therearward recess 12 of the above-mentionedvane body 1, it also blows against the outward curvedfront surface 117 of thefront plate portion 111 of an opposingvane body 1 that is located diametrically opposite to the above-mentionedvane body 1. At this point, while some part of the air currents of the wind is guided by the outward curvedfront surface 117 toward outer sides of the opposingvane body 1, other part of the air currents of the wind acting on thefront plate portion 111 is guided into thesunken portion 118 to pass through theopenings 321 on theopenwork screen 3 and blow against the firstmovable baffle unit 4, bringing the firstmovable baffle unit 4 to turn about thepivot point 411 of thebaffle support bar 41 while being guided by the firstarcuate guide bar 2 to move away from theopenwork screen 3 to an opened position. Meanwhile, the wind passes through theopenings 431 on the firstmovable baffle unit 4 to act on the secondmovable baffle unit 6, bringing the secondmovable baffle unit 6 to move away from the firstmovable baffle unit 4 while sliding along the secondarcuate guide bar 47. At this point, with the throughhole 116 and the first and the secondmovable baffle unit vane body 1 in an opened state, the wind is no longer blocked by the opposingvane body 1 but can pass through theopenings 321 on theopenwork screen 3 and theopenings 431 on the firstmovable baffle unit 4 to be guided to outer sides of the opposingvane body 1. As a result, the air resistance at the opposingvane body 1 is reduced. - A
second buffer spring 63 is provided between the firstmovable baffle unit 4 and the secondmovable baffle unit 6. When the secondmovable baffle unit 6 is moved toward the firstmovable baffle unit 4 to close the same, thesecond buffer spring 63 functions to buffer the impact of the secondmovable baffle unit 6 against the firstmovable baffle unit 4. Therefore, damaged parts and noise caused by such impact can be avoided. - Similarly, a
stop unit 5 is provided on the firstarcuate guide bar 2 near thesecond end 22 thereof. Thestop unit 5 includes astop ring 51 and astop spring 52, which provide the same functions as in the first embodiment. And, thestop unit 5 further includes a holdingdevice 53, which is pivotally turnably connected to one lateral side of thestop ring 51. The holdingdevice 53 includes acontrol lever 531 and ahook 532. However, in the second embodiment, thepush bar 45 and the retainingring 46 corresponding to thecontrol lever 531 and thehook 532, respectively, are provided on theflange 473 of the secondarcuate guide bar 47 of the firstmovable baffle unit 4. When the firstmovable baffle unit 4 and the secondmovable baffle unit 6 are blown open by a strong wind, they can still be held to thestop unit 5 through engagement of thehook 532 of the holdingdevice 53 with the retainingring 46, just the same as in the first embodiment. - Similarly, the holding
device 53 further includes an outward projectedrelease lever 533, which can be pulled to release thehook 532 from the retainingring 46. - With the vane structure of the present invention, when the
rearward recess 12 of thevane body 1 is located against the wind, the movable baffle unit orunits vane body 1 are located at a closed position to close theopenwork screen 3 and the throughhole 116, allowing therearward recess 12 to effectively intercept the wind force; and when therearward recess 12 of thevane body 1 is located before the wind, the movable baffle unit orunits hole 116 on thevane body 1 to outer sides of thevane body 1 without producing an increased air resistance to therotating vane body 1. Further, since themovable baffle units movable baffle units stop unit 5, thevane body 1 can be protected against exceeded turning angle under strong wind, and accordingly, the whole vane structure and the wind power generator are protected against damage possibly caused by the excessively turnedvane body 1. - The present invention has been described with some preferred embodiments thereof and it is understood that many changes and modifications in the described embodiments can be carried out without departing from the scope and the spirit of the invention that is intended to be limited only by the appended claims.
Claims (18)
1. A vane structure for vertical axis wind power generator, comprising a plurality of vanes mounted around and spaced along a main shaft of the wind power generator, each of the vanes comprising:
a vane body having a body portion that defines a rearward recess; the body portion including a front plate portion, on which a through hole is formed;
a first arcuate guide bar being located in the rearward recess, and having a first end and an opposing second end; the second end being fixedly connected to the body portion and the first end being located at a center of the through hole;
an openwork screen being fitted in the through hole and connected to the first end of the first arcuate guide bar; and
a first movable baffle unit being located in the rearward recess and slidably fitted around the first arcuate guide bar; the first movable baffle unit being pivotally turnably connected to the front plate portion via a baffle support bar, such that the first movable baffle unit is able to openably cover the openwork screen from one side adjacent to the rearward recess.
2. The vane structure for vertical axis wind power generator as claimed in claim 1 , wherein the body portion is provided on outer peripheral surfaces thereof with a plurality of parallelly and continuously arranged ridges and valleys, which are extended between a front and a rear side of the vane body.
3. The vane structure for vertical axis wind power generator as claimed in claim 1 , wherein the front plate portion has an outward curved front surface, and an area of the outward curved front surface surrounding the through hole is formed into a bell-shaped sunken portion.
4. The vane structure for vertical axis wind power generator as claimed in claim 3 , wherein the openwork screen includes a sleeve portion and a screen body connected to and located around the sleeve portion; the sleeve portion being fitted around the first end of the first arcuate guide bar, and the screen body being fixedly connected at an outer periphery thereof to an inner peripheral wall of the through hole; and the screen body having a plurality of openings formed thereon.
5. The vane structure for vertical axis wind power generator as claimed in claim 4 , wherein the first movable baffle unit includes a first sleeve and a first movable baffle connected to and located around the first sleeve; the first sleeve being slidably fitted around the first arcuate guide bar, and the first movable baffle normally covering the openwork screen from one side adjacent to the rearward recess.
6. The vane structure for vertical axis wind power generator as claimed in claim 5 , wherein the openwork screen and the first movable baffle unit have a first buffer spring provided therebetween, and a first and a second magnetic ring having the same polarity are respectively provided on the first buffer spring and the first movable baffle unit at contact faces thereof.
7. The vane structure for vertical axis wind power generator as claimed in claim 6 , wherein the vane further includes a stop unit, which includes a stop ring fixedly connected to the first arcuate guide bar near the second end thereof and a stop spring arranged on the first arcuate guide bar to one side of the stop ring facing toward the first end of the first arcuate guide bar.
8. The vane structure for vertical axis wind power generator as claimed in claim 7 , wherein the stop unit further includes a holding device being pivotally turnably connected to a lateral side of the stop ring, and the holding device including a control lever and a hook connected to the control lever; and wherein the first movable baffle unit is provided at positions corresponding to the control lever and the hook with a push bar and a retaining ring, respectively; and the holding device further including an outward projected release lever.
9. A vane structure for vertical axis wind power generator, comprising a plurality of vanes mounted around and spaced along a main shaft of the wind power generator, each of the vanes comprising:
a vane body having a body portion that defines a rearward recess; and the body portion including a front plate portion, on which a through hole is formed;
a first arcuate guide bar being located in the rearward recess, and having a first end and an opposing second end; the second end being fixedly connected to the body portion and the first end being located at a center of the through hole;
an openwork screen being fitted in the through hole and connected to the first end of the first arcuate guide bar;
a first movable baffle unit having openings formed thereon and being located in the rearward recess of the vane body behind the openwork screen; the first movable baffle unit including a second arcuate guide bar in the form of a sleeve slidably fitted around the first arcuate guide bar, and being connected to the front plate portion of the vane body via a pivot point on a baffle support bar, so that the first movable baffle unit is turnable about the pivot point to openably cover the openwork screen from one side adjacent to the rearward recess; and the second arcuate guide bar having a proximal end and a distal end, and a radially outward extended flange formed around the distal end; and
a second movable baffle unit being located in the rearward recess of the vane body behind the first movable baffle unit; the second movable baffle unit being slidably fitted around the second arcuate guide bar to openably cover the first movable baffle unit from one side adjacent to the rearward recess.
10. The vane structure for vertical axis wind power generator as claimed in claim 9 , wherein the body portion is provided on outer peripheral surfaces thereof with a plurality of parallelly and continuously arranged ridges and valleys, which are extended between a front and a rear side of the vane body.
11. The vane structure for vertical axis wind power generator as claimed in claim 9 , wherein the front plate portion has an outward curved front surface, and an area of the outward curved front surface surrounding the through hole is formed into a bell-shaped sunken portion.
12. The vane structure for vertical axis wind power generator as claimed in claim 11 , wherein the openwork screen includes a sleeve portion and a screen body connected to and located around the sleeve portion; the sleeve portion being fitted around the first end of the first arcuate guide bar, and the screen body being fixedly connected at an outer periphery thereof to an inner peripheral wall of the through hole; and the screen body having a plurality of openings formed thereon.
13. The vane structure for vertical axis wind power generator as claimed in claim 12 , wherein the first movable baffle unit includes a first sleeve and a first movable baffle connected to and located around the first sleeve; the first sleeve being fitted around the proximal end of the second arcuate guide bar, and the first movable baffle having a plurality of openings formed thereon.
14. The vane structure for vertical axis wind power generator as claimed in claim 13 , wherein the second movable baffle unit includes a second sleeve and a second movable baffle connected to and located around the second sleeve; the second sleeve being slidably fitted around the second arcuate guide bar, and the second movable baffle normally covering the openings on the first movable baffle from one side adjacent to the rearward recess.
15. The vane structure for vertical axis wind power generator as claimed in claim 14 , wherein the openwork screen and the first movable baffle unit have a first buffer spring provided therebetween, and a first and a second magnetic ring having the same polarity are respectively provided on the first buffer spring and the first movable baffle unit at contact faces thereof.
16. The vane structure for vertical axis wind power generator as claimed in claim 15 , wherein the first movable baffle unit and the second movable baffle unit have a second buffer spring provided therebetween.
17. The vane structure for vertical axis wind power generator as claimed in claim 16 , wherein the vane further includes a stop unit, which includes a stop ring fixedly connected to the first arcuate guide bar near the second end thereof and a stop spring arranged on the first arcuate guide bar to one side of the stop ring facing toward the first end, of the first arcuate guide bar.
18. The vane structure for vertical axis wind power generator as claimed in claim 17 , wherein the stop unit further includes a holding device being pivotally turnably connected to a lateral side of the stop ring and including a control lever and a hook connected to the control lever; and wherein the second arcuate guide bar is provided on the flange at positions corresponding to the control lever and the hook with a push bar and a retaining ring, respectively; and the holding device further including an outward projected release lever.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2008101807826A CN101749180B (en) | 2008-12-02 | 2008-12-02 | Vane of vertical shaft type wind driven generator |
CN200810180782.6 | 2008-12-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20100135802A1 true US20100135802A1 (en) | 2010-06-03 |
Family
ID=42222971
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/628,164 Abandoned US20100135802A1 (en) | 2008-12-02 | 2009-11-30 | Vane structure for vertical axis wind power generator |
Country Status (4)
Country | Link |
---|---|
US (1) | US20100135802A1 (en) |
JP (1) | JP4948589B2 (en) |
KR (1) | KR20100062964A (en) |
CN (1) | CN101749180B (en) |
Cited By (10)
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CN101825070A (en) * | 2010-06-04 | 2010-09-08 | 西安交通大学 | Blade structure for wind driven generator |
US20110142638A1 (en) * | 2010-09-17 | 2011-06-16 | General Electric Company | Wind turbine rotor blade with actuatable airfoil passages |
US20110249529A1 (en) * | 2008-12-30 | 2011-10-13 | Martin Hirzel | Flange stirrer |
US20120301294A1 (en) * | 2009-12-09 | 2012-11-29 | Voith Patent Gmbh | Turbine blade for a water turbine with bi-directional flow |
WO2015113543A1 (en) * | 2014-01-31 | 2015-08-06 | Klaus Illigen | Monocoque blade for a vertical axis wind turbine, and wind turbine |
ES2620927A1 (en) * | 2015-12-29 | 2017-06-30 | Mikonos Xviii Sl | Vertical rotation axis wind turbine with composite turbine wind turbine (Machine-translation by Google Translate, not legally binding) |
CN108496955A (en) * | 2018-05-31 | 2018-09-07 | 国网山东省电力公司经济技术研究院 | A kind of ADSS optical cables bird-scaring unit and installation method with infrared detection |
CN113090450A (en) * | 2021-05-08 | 2021-07-09 | 武岳 | Adjustable fan blade assembly for wind power generation |
US11143164B1 (en) * | 2018-04-26 | 2021-10-12 | Epic Metals Corporation | Vertical windmill blade |
WO2024078538A1 (en) * | 2022-10-12 | 2024-04-18 | 武汉云太极科技有限公司 | Open-close type vertical-axis fluid wheel power generation device and power generation unit |
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CN102678447B (en) * | 2012-05-23 | 2014-01-29 | 浙江工商大学 | Micro-resistance tuning-free wind power device |
KR101369942B1 (en) * | 2012-07-20 | 2014-03-04 | 이희상 | A windmill having variable blades |
JP5240883B1 (en) * | 2012-10-11 | 2013-07-17 | かしま野管理サービス株式会社 | Wind tunnel rotating blade |
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JP5877458B1 (en) * | 2015-07-15 | 2016-03-08 | かしま野管理サービス株式会社 | Wind tunnel rotating blade |
KR101738385B1 (en) * | 2015-07-17 | 2017-05-22 | 피경문 | Wind power system |
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- 2009-12-01 JP JP2009273324A patent/JP4948589B2/en not_active Expired - Fee Related
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US3399966A (en) * | 1964-05-18 | 1968-09-03 | Trurumi Soda Company Ltd | Novel cobalt oxide and an electrode having the cobalt oxide coating |
US5266006A (en) * | 1993-02-25 | 1993-11-30 | Tsui I Hua | Windmill with removable wind vane plates arranged in multi-rows-and-lines |
US20040057829A1 (en) * | 2002-09-23 | 2004-03-25 | Ghazi Khan | High efficiency vertical axis windmill |
US8177481B2 (en) * | 2007-09-10 | 2012-05-15 | Ray-Hung Liang | Vertical axis wind turbine |
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Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110249529A1 (en) * | 2008-12-30 | 2011-10-13 | Martin Hirzel | Flange stirrer |
US20120301294A1 (en) * | 2009-12-09 | 2012-11-29 | Voith Patent Gmbh | Turbine blade for a water turbine with bi-directional flow |
CN101825070A (en) * | 2010-06-04 | 2010-09-08 | 西安交通大学 | Blade structure for wind driven generator |
US20110142638A1 (en) * | 2010-09-17 | 2011-06-16 | General Electric Company | Wind turbine rotor blade with actuatable airfoil passages |
US8016560B2 (en) * | 2010-09-17 | 2011-09-13 | General Electric Company | Wind turbine rotor blade with actuatable airfoil passages |
DK178158B1 (en) * | 2010-09-17 | 2015-07-06 | Gen Electric | Wind turbine rotor blade with actuatable airfoil passages |
WO2015113543A1 (en) * | 2014-01-31 | 2015-08-06 | Klaus Illigen | Monocoque blade for a vertical axis wind turbine, and wind turbine |
ES2620927A1 (en) * | 2015-12-29 | 2017-06-30 | Mikonos Xviii Sl | Vertical rotation axis wind turbine with composite turbine wind turbine (Machine-translation by Google Translate, not legally binding) |
US11143164B1 (en) * | 2018-04-26 | 2021-10-12 | Epic Metals Corporation | Vertical windmill blade |
CN108496955A (en) * | 2018-05-31 | 2018-09-07 | 国网山东省电力公司经济技术研究院 | A kind of ADSS optical cables bird-scaring unit and installation method with infrared detection |
CN113090450A (en) * | 2021-05-08 | 2021-07-09 | 武岳 | Adjustable fan blade assembly for wind power generation |
WO2024078538A1 (en) * | 2022-10-12 | 2024-04-18 | 武汉云太极科技有限公司 | Open-close type vertical-axis fluid wheel power generation device and power generation unit |
Also Published As
Publication number | Publication date |
---|---|
CN101749180B (en) | 2012-02-01 |
KR20100062964A (en) | 2010-06-10 |
CN101749180A (en) | 2010-06-23 |
JP2010133411A (en) | 2010-06-17 |
JP4948589B2 (en) | 2012-06-06 |
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Legal Events
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STCB | Information on status: application discontinuation |
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