KR100984862B1 - Vertical axis wind turbine - Google Patents

Vertical axis wind turbine Download PDF

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Publication number
KR100984862B1
KR100984862B1 KR1020090108817A KR20090108817A KR100984862B1 KR 100984862 B1 KR100984862 B1 KR 100984862B1 KR 1020090108817 A KR1020090108817 A KR 1020090108817A KR 20090108817 A KR20090108817 A KR 20090108817A KR 100984862 B1 KR100984862 B1 KR 100984862B1
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KR
South Korea
Prior art keywords
blade
drag
slot
generating target
main
Prior art date
Application number
KR1020090108817A
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Korean (ko)
Inventor
서형우
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서형우
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Priority to KR1020090108817A priority Critical patent/KR100984862B1/en
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Publication of KR100984862B1 publication Critical patent/KR100984862B1/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D3/00Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor 
    • F03D3/06Rotors
    • F03D3/062Construction
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D7/00Controlling wind motors
    • F03D7/06Controlling wind motors the wind motors having rotation axis substantially perpendicular to the air flow entering the rotor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05BINDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00Components
    • F05B2240/20Rotors
    • F05B2240/21Rotors for wind turbines
    • F05B2240/211Rotors for wind turbines with vertical axis
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/74Wind turbines with rotation axis perpendicular to the wind direction

Abstract

PURPOSE: A vertical axis wind turbine is provided to increase rotation torque at low speed and high speed by increasing the aerodynamic characteristic of a blade at high speed and increasing dynamic lift for drive at low speed. CONSTITUTION: A vertical axis wind turbine comprises a rotary shaft(11), a support bar(12), and multiple blades(20). The blades are installed at the rotary shaft and installed in the columnar direction at fixed intervals. The blade comprise a main body(21) having an edge portion(22) and a tail portion(23). A slot(31) is formed on the inner side of the blade corresponding to the rotary shaft in the longitudinal direction. A drag force generating chord unit is installed inside the main body of the blade. The drag force generating chord unit is lead in and draw out through the slot. The drive unit is installed inside the main body.

Description

Vertical axis wind turbine}

The present invention relates to a vertical windmill, and more particularly to a vertical windmill for wind power generation that can increase the maneuverability by increasing the drag during the initial driving of the wind generator, and can reduce the drag during high-speed rotation.

In general, a windmill rotates a blade by natural wind, and converts it into electrical power by rotating a generator by increasing the speed by using a gear mechanism or the like. Such windmills for wind power generation are represented by Dutch windmills, and a horizontal shaft windmill whose rotation axis is horizontal with respect to the wind, and a vertical shaft windmill whose rotation axis is perpendicular to the wind are known.

Among these, the vertical axis windmill is known as a drag type that rotates the windmill by the drag generated on the blade, such as a paddle type or savonius type, and a lift type that rotates the windmill by the lifting force generated on the blade, such as the Darius type or the gyromill type. have.

That is, the former rotates the windmill by the drag difference while reducing the resistance of the blade toward the blow-up side, while the latter rotates the windmill by the lift force generated in the blade.

In the case of the electron (drag type) of the vertical axis type, when the circumferential speed ratio (blade air foil end speed / wind speed) is 1, a moment for rotating the windmill no longer occurs, and even if the wind speed rises, even more rotational speed may be obtained. And low power generation efficiency.

In the latter case (lift type), the aerodynamic characteristics of the windmill are improved when the circumferential ratio is 1 or more, and the windmill can be efficiently rotated. In addition, there is a drawback that the starting moment is small and the starting from the stop state becomes very difficult.

Korean Patent No. 0637297 discloses a wind power generator. The disclosed wind power generator has a plurality of blades installed at a predetermined angle about the rotation axis in a plane orthogonal to a vertical rotation axis, and the blade is an air foil type having a high lift coefficient with a low Reynolds number and the air foil. A cutout is formed at the trailing edge of the lower surface.

The wind power generator as described above has a problem in that the drag force in the direction of the wind is relatively weak and the drag force for driving at low wind speed is relatively low driving force at low wind speed. That is, the wind generator improves maneuverability at low speed by giving a difference between drag acting at the front and drag acting at the rear. However, this wind turbine has a problem of low efficiency due to the reduction of the blade area at high speed. .

In order to solve the above problems, Korean Patent Publication No. 2009-0101513 discloses a vertical shaft windmill. The disclosed vertical axis windmill is a vertical axis windmill provided with a plurality of blades at equiangular intervals about the vertical axis of rotation in a plane perpendicular to the vertical axis of rotation, wherein the blade has a lift coefficient of 1.0 or more. It is a streamlined wing type, the opening and closing member is axially supported on the back of the blade, the rear end opening and closing the opening and closing member to control the opening and closing operation of the opening and closing member according to the ratio of the rotational speed and the wind speed of the blade Control means.

The vertical axis windmill described above is relatively complicated in structure because the opening and closing control means for opening and closing the opening and closing member is installed inside the wing.

The present invention is to solve the problems as described above, to increase the drag during the initial driving to improve the initial driving force, and to provide a vertical windmill for wind power generation that can increase the driving force by the wind power by reducing the drag during high-speed rotation The purpose is.

Another object of the present invention is to provide a vertical windmill for wind power generation that can draw in and pull out the drag generation target by the improved centrifugal force by increasing the number of revolutions of the blade.

In order to achieve the above object, the vertical windmill of the invention includes a rotating shaft rotatably installed on the support frame, and blades installed at equal intervals in the circumferential direction by the support bar installed on the rotating shaft,

The blade has an airfoil shape and has a body portion having an edge portion and a tail portion, and a slot is formed in the longitudinal direction on the inner surface of the blade corresponding to the rotating shaft, and is installed inside the body portion of the blade and drawn through the slot. And a drag generating feather unit which is drawn out to increase drag for starting;

It is characterized in that it is provided in the main body portion provided with a drive unit for drawing out and pull in the drag generating target of the drag generating target unit from the slot.

In the present invention, the drag generating target unit has guides extending from the upper and lower end sides of the slot into the main body, and the drag generating target supported and supported by the guides and drawn out from the slot. The drive unit includes a feed gear rotatably installed in a support member installed in the main body, a lead screw coupled to a rotational center of the feed gear, the end screw rotatably connected to the drag generating target, and the feed gear. And a motor for driving the lead screw by forward and reverse rotation.

The drive unit is driven by the centrifugal force acting on the blade when the vertical windmill is rotated, and is connected to the rear end of the drag generating target slidably installed by the guides and slidably by the guide block inside the blade main body. A guide rod that is supported, a link member that is rotatably installed in the blade body, and a weight member that is installed at one end of the link member to rotate the link member by centrifugal force, and the link member; And a rope connecting the end of the guide rod, a guide roller installed between the link member and the guide rod, to guide the rope, and supported by the guide rod and the guide block to the drag generating target toward the outlet of the slot. An elastic part for elastic biasing is provided.

The vertical windmill for wind power generation according to the present invention can increase the drag for driving at low speed, and improve the aerodynamic characteristics of the blade acting on the rotation at high speed to increase the rotation torque at low speed and high speed. And the power generation capacity can be improved by increasing the lift at high speed.

One embodiment of a vertical windmill for wind power generation according to the present invention is shown in Figs.

Referring to the drawings, the vertical wind turbine for power generation 10 is to be installed on a steeple, a building, a separate prop, and the like, and the support bars 12 radially installed on the outer axis of the rotary shaft 11 and the rotary shaft 11 and Blades 20 are installed in the vertical direction at the end of the support bar 12.

The blade 20 is formed in the shape of the cross section of the wing of the aircraft. That is, the blade includes a main body portion 21, an edge portion 22 formed on the front surface of the main body portion, and a tail portion 23 positioned at the rear end of the main body portion 21.

And the slot 31 is formed in the longitudinal direction on the inner surface of the blade 20, that is, the inner surface of the blade 20 corresponding to the rotating shaft. In addition, a drag generation target unit 32 is installed in the main body portion 21 of the blade 20 through a slot 31 to increase drag for starting, and the drag generation target unit 32 is provided. The drive unit 40 for drawing and drawing the drag generating target 33 from the slot 31 is provided.

The drag generating target unit 32 is drawn out during initial driving through the slot 31 and drag generated during the main rotation, that is, through the slot 31 when the main speed ratio is at least one rotation, and It is provided in the main body portion 21 is provided with a guide 35 for guiding the force generating target 33. The drag generating target 33 may be formed in a plate or an air foil shape in cross section thereof, and the drag generating target 33 is not limited thereto and may have any structure that can increase drag. And the angle of the drag generating target 33 with respect to the inner surface of the blade 20 is preferably maintained to 55 degrees to 65 degrees. And the slot 31 is preferably formed on the side adjacent to the tail portion 22 of the blade 20, the withdrawal length of the drag generating target 33 may vary depending on the portion of the blade.

On the other hand, the drive unit 40 is installed in the main body portion 21 of the blade for drawing or pulling the drag generating target 33 through the slot 31, an embodiment of Figure 2 and 3 Showed.

Referring to the drawings, the drive unit 40 includes a feed gear 42 rotatably installed on the support member 41 installed inside the main body portion 21, and a center of rotation of the feed gear 42; Lead screw 43 is screwed and the end is coupled to the drag generating target 33, and the motor 45 for forward and reverse rotation of the drive gear 44 engaged with the transfer gear 42. Supply of power to the motor 45 may be made of a rotary connector including a fixed electrode installed on the outer peripheral surface of the rotating shaft to be insulated from the rotating shaft, and a movable electrode installed on the frame or support and in contact with the fixed electrode. The fixed electrode is connected by a motor and an electric wire, and the movable electrode is connected with a power supply line.

Another embodiment of the drive unit 50 is shown in FIGS. 4 and 5. The same reference numerals as the above embodiment indicate the same components.

Referring to the drawings, the driving unit 50 is driven by the centrifugal force acting on the blade when the vertical windmill is driven, and is connected to the rear end of the drag generating target 33 slidably installed by the guides 35. And a guide rod 52 slidably supported by the guide block 51 installed inside the blade body 21. The drag generating target 33 is supported by the guide block 51 and elastically biased to the outside, that is, the side drawn out of the slot by a spring 53 which is an elastic member installed on the guide rod 52. Here, the guide rod 52 may be provided with a stopper for supporting the end side of the screw.

The link member 55 is rotatably installed on the support bracket 54 fixed to the blade body 21, and a weight member 56 for rotating the link member by centrifugal force at one end of the link member. Is installed. The link member 55 and the end of the guide rod 52 are connected by a rope 57, and at least between the link member 55 and the guide rod 52 for guiding the rope 57. One guide roller 58 is installed. Here, the rope 57 is preferably installed to have a tensile force so that it can be drawn at the same time as the rotation of the link member 55.

The driving unit is not limited to the above-described embodiment, and the drag generating target 33 is introduced into the main body through the slot when the vertical wind speed is rotated at high speed, for example, when the circumferential ratio is 1 or more by referring to the centrifugal force or a separate driving force. Any structure can be used.

Referring to the operation of the vertical windmill for wind power generation in the present invention configured as described above are as follows.

The vertical wind turbine for wind power generation 10 according to the present invention can obtain a rotational force at low and high speed by using drag and lift force acting on the blade for generating the air force. That is, in the vertical windmill 10 according to the present invention, the drag generating blade 33 is formed through the slot 31 formed on the side adjacent to the tail portion 23 which is the blade rear side in the breeze (0.5 to 1.5 m / sec). By pulling out, the difference between drag and drag from the edge part in the tail part 23 caused by wind is obtained. It can maximize the gyromill effect by reducing drag and widening the blade surface on which lift is applied.

In more detail, as the drag speed is less than 1, the drag generating target 33 is supported at the end of the blade main body portion 21 as shown in FIGS. 1 and 4 so that the drag force of the tail portion of the blade is increased. The drag portion of the edge portion becomes relatively large and rotates in the breeze, and the rotation force is continuously rotated by the rotational force thereof, thereby maximizing the Svoius effect. That is, since the drag generating area 33 protrudes, the drag generating area at the tail portion is relatively widened, thereby increasing the driving force and the turning force in the breeze. According to the experiments of the inventors, the drag can be increased 4,8 times as compared to the conventional blade, that is, the blade of the aircraft wing in the state where the drag generating target 33 is drawn out of the slot in the breezy (0.5 to 1 m / sec). there was.

On the other hand, when the centrifugal force acts on the blade 30 as the windmill, that is, the number of revolutions increases, the motor is driven as shown in FIG. 2 to draw the drag generating target from the slot 31 into the body portion, As the link member 55 is rotated by centrifugal force, the rope 57 is pulled to draw the drag generating target from the slot.

That is, the pull-in of the drag generating target 33 by the centrifugal force is moved to the outside of the blade as the link member 55 receives the centrifugal force, as shown in FIGS. 4 and 5, and the other end and the rope 57 thereof. The guide rod 52 connected by the puller is pulled to draw the drag generating target from the slot 31. Therefore, it is possible to prevent the blade from being hindered by the drag during the high speed rotation.

The vertical windmill for wind power generation of the present invention combines the advantages of the drag type vertical axis windmill and the lift type vertical axis windmill, and can obtain the sbonius effect and the gyromill effect to the maximum. Therefore, the wind speed (wind speed required for starting from the rotation stop state) can be made lower than that of the conventional vertical shaft windmill, and the rotational force at low wind speed (2-5 m / sec) can be greatly increased, The rotation speed at the wind speed (6 m / sec or more) can be further increased. That is, in a wide range of wind speeds, the efficiency of windmills (efficiency for converting wind power into rotational force) can be greatly improved, and power generation efficiency and the like can be improved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention.

Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

The present invention is applicable to various vertical flat windmills or water wheels.

1 is a perspective view of a vertical windmill for wind power generation according to the present invention;
2 to 3 are side cross-sectional views showing an embodiment of a drive unit according to the present invention;
Figure 4 is a cross-sectional view showing another embodiment of a drive unit of a vertical windmill for wind power generation according to the present invention.
FIG. 5 is a perspective view showing another embodiment of the drive unit shown in FIG. 4. FIG.

Claims (3)

  1. Rotating shaft is rotatably installed on the support frame, and the blade is provided at equal intervals in the circumferential direction by the support bar is installed on the rotating shaft,
    The blade has an airfoil shape, the main body portion having an edge portion and a tail portion, a slot is formed in the longitudinal direction on the inner surface of the blade edge portion corresponding to the rotation axis and guides extending from the edge of the slot into the main body portion; And a drag generating target unit supported by the guides, and having a drag generating target drawn in and out of a slot to increase drag for maneuvering, and being installed inside the main body to provide a drag generating target of the drag generating target unit. A drive unit is provided for withdrawing and withdrawing from the slot,
    The drive unit is driven by the centrifugal force acting on the blade when the vertical windmill is rotated, and is connected to the rear end of the drag generating target slidably installed by the guides and slidably by the guide block installed inside the main body. A guide rod supported, a link member rotatably installed in the blade body by a support bracket, a weight member installed at one end of the link member to rotate the link member by centrifugal force, and the link member. A rope connecting the other end of the guide rod and the end of the guide rod, a guide roller installed between the link member and the guide rod to guide the rope, and supported by the guide rod and the guide block to slot the drag generating target. It is provided with an elastic portion for elastic bias to the exit side of the Vertical windmill for wind power generation.
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  3. delete
KR1020090108817A 2009-11-11 2009-11-11 Vertical axis wind turbine KR100984862B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101238675B1 (en) 2011-01-18 2013-03-04 주식회사 이잰 Blade for Vertical axis turbine system able to ragulate auto-pitch
WO2012177110A3 (en) * 2011-06-24 2013-05-02 Universite Hassan Ii - Casablanca Convertible, self-adjusting, vertical-axis wind turbine combining savonius and darrieus configurations, and having retractable blades
KR101390279B1 (en) 2012-05-24 2014-04-29 삼성중공업 주식회사 Blade for wind power generator
CN110645144A (en) * 2019-09-26 2020-01-03 上海理工大学 Vertical axis wind turbine with front edge active telescopic sliding blade

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040087736A (en) * 2003-04-07 2004-10-15 원인호 Street lamp using cogeneration method for supplying low-priced power to street lamp
JP2007003477A (en) 2005-06-27 2007-01-11 Shinko Electric Co Ltd Device for providing wind speed information
KR100874277B1 (en) * 2007-07-06 2008-12-15 홍 노 김 Turbine construction for wind power generator
JP2009156035A (en) 2007-12-25 2009-07-16 Akio Nanbu Windmill light-emitting delineator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040087736A (en) * 2003-04-07 2004-10-15 원인호 Street lamp using cogeneration method for supplying low-priced power to street lamp
JP2007003477A (en) 2005-06-27 2007-01-11 Shinko Electric Co Ltd Device for providing wind speed information
KR100874277B1 (en) * 2007-07-06 2008-12-15 홍 노 김 Turbine construction for wind power generator
JP2009156035A (en) 2007-12-25 2009-07-16 Akio Nanbu Windmill light-emitting delineator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101238675B1 (en) 2011-01-18 2013-03-04 주식회사 이잰 Blade for Vertical axis turbine system able to ragulate auto-pitch
WO2012177110A3 (en) * 2011-06-24 2013-05-02 Universite Hassan Ii - Casablanca Convertible, self-adjusting, vertical-axis wind turbine combining savonius and darrieus configurations, and having retractable blades
KR101390279B1 (en) 2012-05-24 2014-04-29 삼성중공업 주식회사 Blade for wind power generator
CN110645144A (en) * 2019-09-26 2020-01-03 上海理工大学 Vertical axis wind turbine with front edge active telescopic sliding blade

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