WO2007064155A1 - Aerogenerator - Google Patents

Aerogenerator Download PDF

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Publication number
WO2007064155A1
WO2007064155A1 PCT/KR2006/005119 KR2006005119W WO2007064155A1 WO 2007064155 A1 WO2007064155 A1 WO 2007064155A1 KR 2006005119 W KR2006005119 W KR 2006005119W WO 2007064155 A1 WO2007064155 A1 WO 2007064155A1
Authority
WO
WIPO (PCT)
Prior art keywords
blades
fixing
aerogenerator
vertical axis
plates
Prior art date
Application number
PCT/KR2006/005119
Other languages
French (fr)
Inventor
Yong-Dae Choi
Original Assignee
Geumpoong Energy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to KR10-2005-0115246 priority Critical
Priority to KR20050115246 priority
Priority to KR10-2005-0132123 priority
Priority to KR1020050132123A priority patent/KR20070069702A/en
Priority to KR10-2006-0004586 priority
Priority to KR1020060004586A priority patent/KR100616109B1/en
Priority to KR10-2006-0029792 priority
Priority to KR1020060029792A priority patent/KR20070098301A/en
Priority to KR1020060066041A priority patent/KR100752755B1/en
Priority to KR10-2006-0066041 priority
Application filed by Geumpoong Energy filed Critical Geumpoong Energy
Publication of WO2007064155A1 publication Critical patent/WO2007064155A1/en

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Classifications

    • 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 
    • F03D3/005Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor  axis vertical
    • 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
    • F03D3/061Form
    • 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
    • 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
    • F05B2240/213Rotors for wind turbines with vertical axis of the Savonieus type
    • 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
    • F05B2240/214Rotors for wind turbines with vertical axis of the Musgrove or "H"-type
    • 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
    • F05B2240/30Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a 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
    • F05B2240/30Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05B2240/32Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor with roughened surfaces
    • 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
    • F05B2240/40Use of a multiplicity of similar components
    • 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
    • F05B2250/00Geometry
    • F05B2250/60Structure; Surface texture
    • F05B2250/61Structure; Surface texture corrugated
    • 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
    • F05B2250/00Geometry
    • F05B2250/70Shape
    • F05B2250/71Shape curved
    • F05B2250/713Shape curved inflexed
    • 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
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00Integration of renewable energy sources in buildings
    • Y02B10/30Wind power
    • 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

This invention generally relates to aerogenerators and in particular to aerogenerators with specially-designed blades to enhance the generation efficiency through improvement of the rotation of the blades. The above-mentioned blades have protruding semi -circle-shaped fronts and semi -circle-shaped grooves on the rear, consisting of curved grooves which are curved in one direction from the other sides of the curves and then are curved to the other sides toward the rear in a protruding manner. By having semi-circle-shaped frontal sides, stability at high-speed rotation is improved by reducing vibration regardless of wind strength and changes in the positions of the blades.

Description

[DESCRIPTION] [Invention Title]

AEROGENERATOR [Technical Field]

<i> This invention generally relates to aerogenerators and in particular to aerogenerators with specially-designed blades to enhance the generation efficiency through improvement of the rotation of the blades.

[Background Art]

<2> Generally, an aerogenerator is a device that produces electricity from its electric power generating device that is powered by the kinetic energy of the device's blades that in turn are powered by natural wind energy.

<3>

<4> There are concerns about global warming caused by the thick layer of carbon dioxide in the atmosphere as a result of the use of fossil fuel sources such as oil and coal, and also the soaring oil prices are urging people to look for alternative energy sources. So, research on better ways of generating electricity by utilizing wind energy is gaining popularity day by day.

<5>

<6> Figure 38 is a perspective view of a conventional aerogenerator. A conventional aerogenerator is composed of a vertical axis (810), multiple frames (820) jutting out radially around the said vertical axis (810), multiple blades (830) which are fitted inside the said frames (820) and made to rotate when powered by winds, and an electric power generating device(840) placed at the lower outside of the said vertical axis (810).

<7>

<8> Especially, the said blades are shaped as rectangular blocks with each of them having one side open so that it can be hit by winds.

<9>

<io> This way, electricity is produced by the electric power generating device when the blades placed around the above-said vertical axis are moved by wind energy.

<11>

<12> While the rectangular-shaped blades are very effective for receiving winds from outside, however, a conventional aerogenerator shaped like above has a drawback of receiving that much counter-force of air as well. Therefore, the generation efficiency is low because the rotation of the blades is not good enough. [Disclosure] [Technical Problem]

<13> This invention hereunder generally relates to aerogenerators and in particular aims to provide an aerogenerator with specially-designed blades to enhance the generation efficiency through the improvement of the rotation of the blades.

<14>

<i5> Suggestions to solve the aforesaid problems are as follows:

<16>

<17> 1. Provides an aerogenerator having improved stability in high-speed operation by giving the blades semi-circular instead of rectangular frontal sides, which will reduce the vibration of the blades caused by shifts in wind strength and the blades position.

<18>

<19> 2. Provides an aerogenerator having enhanced generation efficiency by both reducing air resistance and increasing the air absorption to the blades so that the blades can smoothly rotate, in the way to place circumferential fixing plates and blades at either end and in the middle of the aerogenerator.

<20>

<2i> [12] 3. Provides an aerogenerator having enhanced generation efficiency by designing semi-circular grooves which will evenly distribute wind force to the blades and by adopting round-shaped frontal sides of blades which will reduce the resistance of air. <22>

<23> 4. Provides an aerogenerator having enhanced generation efficiency through smooth rotation of blades which results from reducing air resistance. This is implemented by designing whose outside takes an elliptic sphere shape and inside takes a sphere shape.

<24>

<25> 5. Provides an aerogenerator having enhanced generation efficiency. This is implemented by receiving less air resistance since wind pressure is evenly distributed on the blades.

<26>

<27> 6. Provides an aerogenerator receiving less air resistance by directing air flows through the grooves formed on one sides of the blades. [Technical Solution]

<28> The invention hereunder generally relates to aerogenerators, and, in particular, to aerogenerators with specially-designed blades to enhance the generation efficiency through improvement of the rotation of the blades.

<29>

<30> Figure 1 is a perspective view of embodiment example #1 of an aerognerator following the specifications for this invention and Figure 2 is an A-A-I ine cross-sectional view of Figure 1.

<31>

<32> The aerogenerator of embodiment example #1 following the specifications for this invention consists of a vertical axis(lθ) mounted on a base on the ground,

<33> at least one bearing housing(20) each having its center rotatably coupled to said vertical axis(lθ), a plurality of evenly spaced connecting arms(201) each protruded from the cylindrical surface of said bearing housing(20) ;

<34> a plurality of blades 1 (41) fixed to each of said connecting arms (201) by some fixing means(30), and each having a groove portion(411) protruding forward and forming a semi-circle shape at the rear, and made of a curved plate(412) bending toward one direction from one tip of said groove portion(411), and bending again toward the opposite direction shaping a backward curve; and

<35> an electric power generating device(5) directly or indirectly connected to said bearing housing(20)

<36>

<37> And said connecting arms(201) are composed of horizontal arms(2011) protruding from the bearing housings(20); said fixing part(30) is composed of tapping threads (301) made on the outer sides of said connecting arms(201) , holes(302) drilled onto the blades 1 (41) corresponding to said tapping threads and bolts (303) fixed into said tapping threads penetrating the holes(301).

<38> <39>

<40> Especially, the said vertical axis (10) is fixed to the ground with concrete or steel structures, and the bearing housings (20) rotate smoothly around the vertical axis, (10) supported by the bearings (202) installed inside the said bearing housings (10).

<41>

<42> Figure 3 shows a perspective view of another embodiment example following the specifications for embodiment example #1 of this invention, and Figure 4 is a B-B-I ine cross-sectional view of Figure 3. said blades 1 (41) include a rear protruding portion(413) having a semi-circle-shaped fixing groove(4131) on the inner side of each blade 1 (41).

<43>

<44> Said connecting arms(201) comprise of horizontal protruding arms(2012) from said bearing housing(20) and branch 1 and 2(2013,2014) diverging from the outer edge of said horizontal protruding arms(2012) where there is additionally equipped semi-circular part(2015) protruding forward from tip of said branch 2 so that the arms are held by said fixing groove(4131); said fixing means have tapping threads(304) made on the outer sides of said branch 1 and 2, and multiple holes(305) which are drilled onto said blades 1 (41) corresponding to said tapping threads(304), and multiple bolts(303) fixed into said tapping threads penetrating said holes(305).

<45> <46>

<47> Figure 5 represents a perspective view of another embodiment example following the specifications for embodiment example #1 of this invention. Circumferential fixing plates 1 (50) connect said blades 1 (41) together and having holes(501) in the middle, and are equipped in the lower, middle and upper sections of said blades 1 (41).

<48>

<49> That is, the upper, middle and lower parts of the said blades (41) are supported by the said circumferential fixing plate 1 (50) so that reduced wind resistance reduces vibration caused by the rotation of blades 1 (41).

<50>

<5i> Impact by strong wind force can be minimized by directing wind outward through the penetration holes (501) of the said circumferential fixing plate 1 (50) when outside wind gets inside and hits the said blades 1.

<52>

<53> Also added are fixed reinforcement plates 1 (61) which are the upper parts of the said circumferential fixing plates (50) and are protruding outward from the linking bars (201). The said fixed reinforcement plates (61) consist of horizontal plates (611) protruding horizontally and tilted plates 1 and 2 (612 and 613) which protrude in a tilted manner from the outer sides of the said horizontal plates (611) and which are fixed onto the said circumferential fixing plates (50) by bolts (8).

<54>

<55> Figure 6 represents another embodiment of circumferential fixing plates following the specifications for embodiment example #1 of this invention.

<56> Circumferential fixing plates 1 (50) of blades 1 ( 41) have groove portions (502) formed to the inner sides of the circumference corresponding to the width of middle part of said blades 1 (41).

<57>

<58> Figure 7 shows another embodiment example of circumferential fixing plates 1 following the specifications for embodiment example #1 of this invention.

<59> Circumferential fixing plates 1 (50) are fixed at the upper, middle and lower parts of said vertical axis (10) in order that said vertical axis(lθ) penetrates the centers of the plates: said fixing plates are evenly separated, fixing the upper, or lower, or middle section of said blades 1 (41), containing multiple fixing parts(503) including convex round part(5031), multiple concave groove parts(504) which connect each said fixing parts(503) to one another and convex round parts(505) formed on the edge connecting one end of fixing parts(503) with said concave round parts(504).

<60>

<6i> In addition, reinforcement plates 1 (61) which are the upper parts of the said circumferential fixing plates (50) and protrude outward from the linking bars (201) are added. The said reinforcement plates 1 (61) consist of horizontally-protruding horizontal plates (611) and tilted plates 1 and 2 (612 and 613) which protrude in a tilted manner from the outer sides of the said horizontal plates and which are fixed onto the said circumferential fixing plates 1 (50) with bolts.

<62>

<63> Figure 8 shows another embodiment example of circumferential fixing plates 1 following the specifications for the embodiment example #1 of this invention.

<64> Circumferential fixing plates 1 (50) are designed to wrap said blades 1 (41) with a constant width along the cross-sections of said blades 1 (41).

<65>

<66> The invention hereunder relates to aerogenerators and in particular to aerogenerators whose blades 1 rotate smoothly by means of reducingresistance and making ease the intake of wind with blades 1 and circumferential fixing plates 2 installed at the upper, lower and middle parts of the aerogenerator . <67> embodiment example of this invention, with attached figures being used for reference.

<68>

<69> Figure 9 represents a perspective view of implantation example #2 of the aerogenerator following the specifications for this invention and Figure 10 gives a C-C-I ine cross-sectional view of Figure 9.

<70>

<7i> An aerogenerator of embodiment example #2 following the specifications for this invention consists of a vertical axis(lθ) mounted on a base on the ground;

<72> a plurality of blades 1 (41) supported and connected to said vertical axis (10) by one or more circumferential fixing plates fixed to said vertical axis(lθ);

<73> an electric power generating device (5) indirectly connected to said blades 1 (41) by some fixing means(30), and each having a groove portion(411) protruding forward and forming a semi-circle shape at the rear, and made of a curved plate(412) bending toward one direction from one tip of said groove portion(411), and bending again toward the opposite direction shaping a backward curve;

<74>

<75> Said fixed circumferential plates 2 (51) are equipped at the upper, middle, and lower parts of said vertical axis(lθ) in order that the vertical axis(lθ) penetrates the centers of the plates, and where the fixed plates are evenly separated, fixing the upper, or lower, or middle section of said blades 1 (41): the aerogenerator comprises of multiple fixing parts including circular-arc parts and multiple convex round parts(5111); concave round parts(5112) facing each other; and convex round parts which connect each of said fixing parts(511).

<76>

<77> <78> Additionally, a plurality of holes(513) evenly spaced are around the central circumference of said circumferential fixing plates 2 (51). a plurality of holes (513) evenly spaced around the central circumference of said circumferential fixing plates 2 (51).

<79>

<80> Especially, the mentioned circumferential fixing plates 2 (51) are firmly held to the vertical axis (10) by multiple supporting arms (5131) installed on the inner sides of the mentioned penetration holes (513).

<81>

<82> Additionally, upper and lower reinforcement rings (515 and 516), which are fixed by penetration onto the vertical axis, are attached to the upper, lower and middle sections of the mentioned circumferential fixing plates 2 (51) in order to reinforce the centers of circumferential fixing plates 2 (51).

<83> by reducing vibration caused onto the mentioned blades 1 (41).

<84>

<85> Here, prior to describing another example of an aerogenerator for embodiment example 2 following the specifications for this invention, it is assumed hereunder in another embodiment example of this invention that the composition of the aerogenerator following the specifications for embodiment example 2 is the same except for the circumferential fixing plates 2 which will be described later.

<86>

<87> As shown in Figure 11 and Figure 12, aerogenerator according to claim 10, wherein said circumferential fixing plates 2 (51) are fixed to the vertical axis(lθ) and equipped at the upper, middle and lower parts of the vertical axis(lθ) in the way that the vertical axis(lθ) passes though the centers of the plates; comprise protruding plates evenly spaced in each circumference, fixed and separating the upper, or middle, or lower section of said blades, having holes in the middle of each circumferential fixing plate 2 , having wider outer sides and narrower inner sides, and having streamlined lateral sides (5142) .

<88> And upper and lower reinforcement rings(515,516) are passed through by vertical axis(lθ), and reinforcing the center of said circumferential fixing plates 2 (51).

<89>

<90> This invention hereundergenerally relates to aerogenerators and in particular to aerogenerators with specially-designed blades to enhance the generation efficiency through improvement of the rotation of the blades.

<91>

<92> The invention is described hereunder, with attached figures used as reference.

<93>

<94> Figure 13 is a perspective view of embodiment example#3 of an aerogenerator following the specifications for this invention, and Figure 14 is an E-E-I ine cross-sectional view of Figure 13.

<95>

<96> An aerogenerator of embodiment example #3 following the specifications for this invention consists of a vertical axis(lθ) mounted on a base on the ground;

<97> one or more bearing housings(20) each having its center rotatably coupled to said vertical axis(lθ), and having a plurality of evenly spaced connecting arms(201) each protruded from the cylindrical surface of said bearing housing(20);

<98> a plurality of blades 1 (41) fixed to said connecting arms(201) with fixing means(30); and an electric power generating device(5) directly or indirectly connected to said bearing housings(20) by some fixing means(30).

<99> Said blade 1 (41)has streamlined and protruding front sides allowing the rear to have semi-circle-shaped groove portion(411) ; made of a curved plate bending toward one direction from one tip of said groove portion, and bending again toward the opposite direction shaping a backward curve; <ioo> <101>

<iO2> And said connecting arms(201) are composed of horizontal plates protruding from the bearing housing(20); said fixing means(30) are composed of tapping threads(301) made on the outer sides of said connecting arms(201), holes(302) drilled on the blades 1 (41) corresponding to said tapping threads(301), and bolts fixed into said tapping threads penetrating said holes(302).

<103>

<iO4> Figure 15 shows a perspective view of another embodiment example following the specifications for embodiment example #3 of this invention, and Figure 16is a F-F-I ine cross-sectional view of Figure 15 where the inner sides of the blades 1 (41) are equipped with rear protruding parts(413) containing semi-circle-shaped fixing groove(4131)

<105>

<iO6> The aerogenerator further comprises protrudent semi-circular parts protruding forward from tip of said branch 2 (2014)so that the arms are held by said fixing groove(4131); but said connecting arms consist of horizontal protruding arms projected from said bearing housings(20) and branch 1 and 2(2013,2014) protruding the outer edge of said horizontal protruding arms(201).

<i07> Said fixing means(30) have tapping threads(304) made on the outer sides of said branch 1 and 2(2013,2014), and multiple holes(305) which are drilled onto blades 1 (41) which correspond to said tapping threads(304), and multiple bolts fixed into said tapping thread penetrating said holes(305).

<108>

<1O9> Figure 17 represents a perspective view of another embodiment example following the specifications for embodiment example #3 of this invention. The aerogenerator further comprises circumferential fixing plates 1 (50) connecting the upper, lower and middle sections of said blade 1 (41) together, and having holes (501) in the middle.

<πo> <iπ> Here, the purpose of this invention is to provide an aerogenerator the frontal parts of which are streamline-shaped so that air resistance is reduced and whose generation efficiency of the blades is increased by evenly distributing wind resistance using semi-circle-shaped grooves.

<112>

<ii3> Described hereunder is an example of a proper embodiment of this invention, with the attached figures as reference.

<114>

<ii5> Figure 18 is a perspective view of embodiment example 4 of an aerogenerator following the specifications for this invention and Figure 19 is a G-G-I ine cross-sectional view of Figure 19.

<116>

<ii7> The aerogeneator in this invention consists of a vertical axis(lθ) mounted on a base on the ground, a plurality of blades 2 (42) connected by connecting arms(71) protruding from the outer circumference of said vertical axis(lθ), and rotation by wind power, and an electric power generating device (5) connected to said bearing house.

<ii8> Said blade 2 (42) comprises a groove portion(411) protruding forward and forming a semi-circle shape at the rear, and made of a curved plate(412) bending toward one direction from one tip of said groove portion(411), and bending again toward the opposite direction shaping a backward curve;

<ii9> but the width of the curve gets narrower at both ends of the curved plate, and the combination of said blades 2 (42) is characterized by outer side's elliptic sphere shape and inner sides' sphere shape.

<120>

<i2i> Additionally, a reinforcement fixing plates 2 (62) are added to the connecting part of said blades 2 (42) and connecting arms(71).

<122>

<i23> Figure 20 is an H-H-I ine cross-sectional view of Figure 21 and Figure 22 is a J-J-I ine cross-sectional view of Figure 20.

<124> <i25> As show from Figure 20 to Figure 22, fixing plates (52) supporting said blades 2 (42) are added between said blades 2 (42) and connecting arm (71).

<126>

<127> And reinforcement fixing plates 2 (62) are added at the joint of said fixing plates(52) and connecting arms(71). The mentioned reinforcement plates 2 (62) consist of horizontally-protruding bars (621) and tilted bars 1 and 2 (622 and 623) which protrude from the outer sides of the protruding bars (621) and then to two sides in a tilted manner, and are fixed onto the mentioned fixed plates (52) by fixtures.

<128>

<129> And the above-mentioned linking bars are composed of holes (624) drilled on the outer sides of the above-mentioned tilted bars 1 and 2 (622 and 623), multiple tap holes (522) drilled on the mentioned fixed plates (52) in the way that the tap holes correspond to the above-mentioned holes (624), and multiple bolts (8) inserted into the mentioned tap holes (522) after going through the mentioned holes (624).

<130>

<i3i> Figure 23 is a top view showing another embodiment example of a fixing plate according to embodiment example 5 of this invention. Said fixing plate(52) of the blade concave groove portion(523) from the circumference to the inner side is formed corresponding to the width of the middle of said blade 2 (42).

<132>

<133> Figure 24 is a top view of another embodiment example of a fixing plate according to embodiment example 5 of this invention. Fixing plates (52) are fixed at the upper, middle and lower parts of said vertical axis(lθ) in order that said vertical axis penetrates the centers of the plates: said fixing plates are evenly separated, fixing the upper, or lower, or middle section of said blades 2 (42) , containing multiple fixing parts including convex round part(525), multiple concave groove parts which connect each said fixing parts(524) to one another and convex round parts(526) formed on the edge connecting one end of fixing parts with said concave round parts(525).

<134>

<135> Figure 25 shows a top view of another example of a fixing plate according embodiment example 5 for this invention. Fixing plates(52) are designed to wrap said blades 2 (42) with a constant width along the cross- sections of said blades 2 (42).

<136>

<i37> So, this invention has been made in order to solve the problems as above and it aims to provide an aerogenerator with enhanced generation efficiency by receiving less air resistance by dispersing wind pressure.

<138>

<139> Described hereunder is the invention with figures as reference.

<140>

<i4i> Figure 26 represents a perspective view of embodiment example 6 of an aerogenerator according to this invention. Figure 27 is a top view of embodiment example 6 of an aerogenerator according to this invention. Figure 28 is a K-K-I ine cross-sectional view of Figure 26.

<142>

<i43> As described in Figure 26 and Figure 27 , the aerogenerator comprising: <i44> a vertical axis(lθ), a plurality of blades 3 (43) connected and fixed to said vertical axis by fixing means(63), an electric power generating device(5) connected to the circumference of said vertical axis(lθ) by one or more fixing plates(53) linked to the vertical axis(lθ) and producing electromotive force through the rotation of the blades 3 (43); and the said blades 3(43) each having a groove portion(4311) protruding forward and forming a semi-circle shape at the rear, and made of a curved plate (4312) bending toward one direction from one tip of said groove portion, and bending again toward the opposite direction shaping a backward curve; and symmetrically slant blade having protruding middle part of blades toward one direction. <145>

<146> The above-mentioned blades 3 (43) consist of grooves (4311) having semi-circle-shaped and protruding fronts and elliptical-shaped rears and curved plates (4312) which are curved in one direction from the other parts of the mentioned grooves (4311) and then protrude backwards in a curved manner.

<147>

<148> Additionally, a plurality of sub-blades 3 (4313) are positioned in the inner side at various heights in the outer side of said blades part (431).

<149>

<i50> The above-mentioned fixed plates (53) include a penetration holes (534) drilled on the center in the way that the holes pass through the mentioned vertical axis (10).

<151>

<152> Said fixing plates 2 (53) are characterized by being placed in the upper, and lower parts of the blades 3 (43) whose center is penetrated by said vertical axis comprising a plurality of fixing parts(531) including one side of circular arc part(5311), and the fixing part(531) evenly spaced around the each blade 3 (43) and fixed as fixing blocks the upper, lower, and middle parts composed of a plurality of blades 3 (43) made of curved plates bending toward one side from one tip of said groove and then bending toward the opposite side comprising a plurality of a concave round part (532)at the one side of said each fixing part, and connecting said each fixing part(531); and comprising a convex round part formated at the edge of said concave round part and on end at the fixing part(531).

<153>

<154> Also, said fixing means(63) comprises bearing housings(631) around the outer part of said vertical axis(lθ), and a plurality of connecting arms(632) linked to said bearing housing at one tip, protruding outward, and linked and fixed to said fixing plate 2 (53) at the other tip. <155>

<156> The mentioned rotation brackets (631) have penetration holes (6311) penetrating the mentioned vertical axis (10) and are fixed to the mentioned liking bars (632) with liking methods such as bolts.

<157>

<158> Bolts are also used in connecting the edges of the mentioned liking bars (632) with the mentioned fixed plates 2 (53).

<159>

<i60> And a middle fixing part (64) is positioned at the middle part of said vertical axis (10) and blades 3 (43).

<161>

<162> And said middle fixing part(64) comprises a bearing housing(641) around the outer part of said axis, brackets fixed to each blade 3 (43) , and connecting arms (643) linking said bearing housing(641) and brackets (642).

<163>

<164> The mentioned fixed brackets (642) consist of horizontally-protruding protruding parts(6421) and reinforcement parts (6422) for blades 3, reinforcing the middle sides of the blades 3 (43), which are extended from the outer sides of the mentioned protruding parts (6421) and which are shaped the same as the mentioned blades 3 (43).

<165>

<i66> The mentioned rotation brackets (641) are connected to the mentioned liking bars (643) and fastened with bolts. <i67> used onto the blades 3 (43) by having wind pressure evenly dispersed by the mentioned blades (431) when wind hits the frontal sides of the blades 3

(43).

<168>

<169> The invention hereunder relates to blades of aerogenerators and their embodiment methods, and in particular to rotation blades 4 of aerogenerators having reduced air resistance by passing wind through holes formed on one sides of blades 4 and their embodiment methods. <17O> of blades 4 and their embodiment methods.

<171>

<i72> Described hereunder is a proper embodiment example for this invention, with the attached figures as reference.

<173>

<174> Figure 29 shows a perspective view of blades 4 in actual use of the aerogenerator of embodiment example 7 according to this invention. Figure 30 is an L-L-line cross-sectional view of Figure 29.

<175>

<i76> As shown in Figure 29 and Figure 30, the aerogenerator of embodiment example 7 according to this invention consists of a vertical axis (11) mounted on the base on the ground, multiple blades connected to the circumference of said vertical axis (11) by some fixing means, each having a groove portion(441) protruding forward and forming a semi-circle shape at the rear, and made of a curved plate (442) bending toward one direction from one tip of said groove portion(441), and bending again toward the opposite direction shaping a backward curve, and an electric power generating device (5) connected to a bearing housing; and a plurality of blades with multiple holes (4421) at one part of groove portion and curved plates, which is one side of said blades 4 (44).

<177>

<178> Especially, the mentioned linking fixtures consist of rotation brackets (111) including bearings (1111) installed outside in order to reduce friction caused by the rotation of the mentioned vertical axis (11), and multiple liking bars (1112) which are installed on the outer sides of the mentioned rotation brackets (111) and are connected to blades 4 (44).

<179>

<i80> As for the mentioned blades 4 (44), the grooves (441) and curved panels (442) are formed by bending flat panels with the help of steel-panel-bending machines after drilling multiple penetration holes (4421) on flat panels.

<181> <i82> Figure 31 is a top view of blades 4 of an aerogenerator of embodiment example 8 according to this invention.

<183>

<184> As shown in Figure 31, the aerogenerator of embodiment example 8 according to this invention consists of a vertical axis(ll) mounted on the base on the ground,

<i85> multiple blades 4 (44) connected to the circumference of said vertical axis by some fixing means, each having a groove portion(441) protruding forward and forming a semi-circle shape at the rear, and made of a curved plate(442) bending toward one direction from one tip of said groove portion(441), and bending again toward the opposite direction shaping a backward curve, an electric power generating device(5) connected to a bearing housing, and a plurality of blades 4 (44) with multiple groove parts at one part of groove portion and curved plates, which is one side of said blades 4 (44).

<186>

<187> The mentioned linking fixtures consist of rotation brackets (111) including bearings (1111) installed outside in order to reduce friction caused by the rotation of the mentioned vertical axis (11), and multiple liking bars (1112) which are installed on the outer sides of the mentioned rotation brackets (111) and are connected to blades 4 (44).

<188>

<i89> Said groove part (443) has a curved shape, and the outer side of the groove is wide, and the inner side is narrow.

<190>

<i9i> Especially, the mentioned concave grooves (443) are semi-circle-shaped and so air flow is made easy to one direction of blades 4 (44) by the mentioned concave grooves (443) and air resistance is reduced, resulting in stable rotation as air resistance to one sides of blades 4 (44) at high-speed rotation of blades 4 (44) is reduced.

<192> <i93> Also, the mentioned concave grooves (443) are formed in the way that the outer sides are wide and the inner sides are narrow, so air resistance outside of the concave grooves (443) with wide receiving area is reduced and air getting inside of the blades 4 (44) gets outside in a reduced quantity.

<194>

<195> As shown in Figure 35, at the stage (300) completing blades 4 (44) of the aerogenerator, penetration holes (4431) are formed by passing a nails through multiple concave grooves (443) formed on blades 4 (44). The mentioned holes (4431) can have various shapes including a cross, a circle, a rectangular, a triangle and so on.

<196>

<i97> Figure 36 is a perspective view of the blades 4 in actual use of the aerogenerator of embodiment example 10 according to this invention, and Figure 37 is an M-M cross-sectional view of Figure 36.

<198>

<i99> As shown in Figure 36 and Figure 37, the aerogenerator of embodiment example 10 according to this invention consists of a vertical axis (11) mounted on the base on the ground, multiple blades 4 (44) connected to the circumference of said vertical axis(ll) by some fixing means, each having a groove portion(441) protruding forward and forming a semi-circle shape at the rear, and made of a curved plate(442) bending toward one direction from one tip of said groove portion(441), and bending again toward the opposite direction shaping a backward curve, an electric power generating device (5) connected to a bearing housing, and

<2oo> a plurality of wrinkled blades (444) with multiple groove parts including holes(4441) in the middle of the inner side at one part of groove portion and curved plates, which is one side of said blades 4 (44).

<201>

<202> Especially, the mentioned linking fixtures consist of rotation brackets (111) including bearings (1111) installed outside in order to reduce friction caused by the rotation of the mentioned vertical axis (11), and multiple liking bars (1112) which are installed on the outer sides of the mentioned rotation brackets (111) and are connected to blades 4 (44).

<203>

<204> And said blade 4 (44) comprises an outer plate(445) and an inner plate(446), and a reinforcement net(447) placed between said outer and inner plates so as to reinforce said blade 4 (44). [Advantageous Effects]

<205> The effects of proper embodiment of this invention are as follows:

<206>

<207> 1. As aforesaid in embodiment plan 1, since the frontal sides of the blades are semi-circle-shaped, vibration due to shifts in wind strength and the blades position will be reduced and thus the aerogenerator will have enhanced stability in high-speed operation.

<208>

<209> 2. As aforesaid in embodiment plan 2, the aerogenerator in this invention utilizes blades and circumferential fixing plates installed at either end and in the middle of the aerogenerator in order to make smooth reception of winds and reduce air resistance to the blades. This way, the blades will rotate smoothly, resulting in an increase of generation efficiency.

<210>

<2ii> 3. As aforesaid in embodiment plan 3, the aerogenerator in this invention has a round-shaped front so that it can reduce air resistance, and also the semi-circle-shaped grooves evenly distribute wind force on the blades, enhancing the generation efficiency of the blades.

<212>

<2i3> 4. As aforesaid in embodiment plans 4 and 5, the aerogenerator in this invention has blades whose outside takes an elliptic sphere shape and inside takes a sphere shape in order to reduce air resistance. This way, smooth rotation of the blades is possible resulting in enhancement of generation efficiency. <214>

<2i5> 5. As aforesaid in embodiment plan 6, the aerogenerator in this invention has such a structure that wind pressure is evenly distributed and that then leads to less air resistance to the aerogenerator, consequently resulting in the enhancement of generation efficiency.

<216>

<2i7> 6. As aforesaid in embodiment plan 7 through 10, the blades of the aerogenerator in this invention reduces air resistance by directing air flows through grooves formed on one sides of the blades.

<218>

<2i9> Also, there are concave grooves on one sides of the blades, which leads to reduction of air resistance when the blades rotate at high speed.

<220>

<22i> In addition, the wrinkled parts formed on one sides of the blades help reduce air resistance by reducing turbulent flows of air on blades.

<222>

<223> Although this invention has been described based on proper embodiment examples with the attached figures as the reference, it is obvious that people working in this field will easily be able to further utilize this description for various other applications without going beyond the scope of this invention. Therefore, the scope of this invention should be construed by the described scope of the claim so as to include many of various application examples.

<224>

[Description of Drawings]

<225> Figure 1 is a perspective view of embodiment example #1 for the aerogenerator in this invention.

<226>

<227> Figure 2 i s a A-A-I ine cross-sect ional view of Figurel .

<228>

<229> Figure 3 is a perspective view of another embodiment example following the specifications for embodiment example #1 for the aerogenerator in this invention.

<230>

<23i> Figure 4 i s a B-B-l ine cross-sect ional view of Figure 3.

<232>

<233> Figure 5 shows another embodiment example of an aerogenerator following the specifications for embodiment example #1 for the aerogenerator in this invention.

<234>

<235> Figure 6 shows another embodiment example of a circumferential fixing plate following the specifications for embodiment example #1 in this invention.

<236>

<237> Figure 7 shows one more embodiment example of a circumferential fixing plate following the specifications for embodiment example #1 in this invention.

<238>

<239> Figure 8 shows one more embodiment example of a circumferential fixing plate following the specifications for embodiment example #1 in this invention.

<240>

<24i> Figure 9 is a perspective view of embodiment example #2 of an aerogenerator following the specifications for this invention.

<242>

<243> Figure 10 i s a C-C-l ine cross-sect ional view of Figure 9.

<244>

<245> Figure 11 shows another embodiment example of an aerogenerator following the specifications for embodiment example #2 of this invention.

<246>

<247> Figure 12 i s a D-D-l ine cross-sect ional view of Figure 11.

<248> <249> Figure 13 is a perspective view of embodiment example #3 of an aerogenerator following the specifications for this invention.

<250>

<25i> Figure 14 i s an E-E-I ine cross-sect ion view of Figure 13.

<252>

<253> Figure 15 is a perspective view of anotherembodiment example following the specifications for embodiment example #3 of an aerogenerator in this invention.

<254>

<255> Figure 16 i s an F-F-I ine cross-sect ional view of Figure 15.

<256>

<257> Figure 17 is a perspective view of another embodiment example following the specifications for embodiment example #3 of an aerogenerator in this invention.

<258>

<259> Figure 18 is a perspective view of embodiment example #4 of an aerogenerator following the specifications for this invention.

<260>

<26i> Figure 19 is a G-G-I ine cross-sect ional view of Figure 18.

<262>

<263> Figure 20 is a perspective view of embodiment example #5 of an aerogenerator following the specifications for this invention.

<264>

<265> Figure 21 i s an H-H-I ine cross-sect ional view of Figure 20.

<266>

<267> Figure 22 i s a J-J-I ine cross-sect ional view of Figure 20.

<268>

<269> Figure 23 is a top cross-sectional view of another embodiment example of a fixed panel following the specifications for embodiment example #5 in this invention.

<270> <27i> Figure 24 is a top cross-sectional view of one more embodiment example of a fixed panel following the specifications for embodiment example #5 in this invention.

<272>

<273> Figure 25 is a top cross-sectional view of one more embodiment example of a fixed panel following the specifications for embodiment example #5 in this invention.

<274>

<275> Figure 26 a perspective view of embodiment example #6 of an aerogenerator following the specifications for this invention.

<276>

<277> Figure 27 a top view of embodiment example #6 of an aerogenerator following the specifications for this invention.

<278>

<279> Figure 28 i s a K-K-I ine cross-sect ional view of Figure 26.

<280>

<28i> Figure 29 is a perspective view of the blades in actual-use conditions for the aerogenerator of embodiment example #7 following the specifications for this invention.

<282>

<283> Figure 30 i s an L-L-I ine cross-sect ional view of Figure 29.

<284>

<285> Figure 31 is a top cross-sectional view of the blades for the aerogenerator of embodiment example #8 following the specifications for this invention.

<286>

<287> Figure 32 is a flow chart on implementing the blades for the aerogenerator of embodiment example #9 following the specifications for this invention.

<288>

<289> Figures 33 through 35 each show each stage of the embodiment procedure for the blades of the aerogenerator of embodiment example #9 following the specifications for this invention.

<290>

<29i> Figure 33 shows the stage of making the blades by bending flat panels.

<292>

<293> Figure 34 shows the stage of making the concave grooves on the blades.

<294>

<295> Figure 35 shows the stage of making the holes on the concave grooves of the blades.

<296>

<297> Figure 36 is a perspective view of the blades for the aerogenerator of embodiment example #10 following the specifications for this invention.

<298>

<299> Figure 37 i s an M-M-I ine cross-sect ional view of Figure 34.

<300>

<30i> Figure 38 shows a conventional aerogenerator. [Best Mode]

<302> The aerogenerator in this invention is a device that produces electrical energy from electric power generating device which is powered by the kinetic energy converted via the blades from wind energy. The main components of the aerogenerator are blades, frames, an electric power generating device and a controlling part.

<303>

<304> The aerogenerators in the embodiment examples following the specifications for this invention considt of a vertical axis mounted on a base on the ground;

<305> at least one bearing housing each having its center rotatably coupled to said vertical axis; a plurality of evenly spaced connecting arms each protruded from the cylindrical surface of said bearing housing; a plurality of blades fixed to each of said connecting arms by some fixing means, and each having a groove portion protruding forward and forming a semi-circle shape at the rear, and made of a curved plate bending toward one direction from one tip of said groove portion, and bending again toward the opposite direction shaping a backward curve!

<306>

<307> The said blades have semi-circular front sides and curved rear sides, and the semi-circular shapes of the front sides are bent with rollers and the curves on the rear sides are shaped with press. To link the blades with connecting arms, circumferential fixing plates are added to the upper and lower edges of the blades. Circumferential fixing plates are also added to the middle of the blades depending on the height, direction and length of each blade. The circumferential fixing plates reinforce the strength of the blades and also form a passage for air flow. The blades are made of metals such as iron, stainless steel and aluminum.

<308>

<309> In case the size of a blade is large, the upper and lower parts could be made separately. Using FRP materials used for air panels would make the rotation easy while enabling the blades to retain enough strength. Join the upper and lower parts by using flanges at the joints and fasten them with rivets or bolts.

<310>

<3ii> Weld the connecting arms to the vertical axis of the blades, make the bearing parts for the lower and upper sides of the vertical axis once the connecting arms and the vertical axis are fixed, and then inspect for any tilting of the connecting arms while rotating the product.

<312>

<3i3> Take into consideration the condition of the place where the frames are to be installed and make the frames as truss structures. Also consider the size of the structures considering the condition of the transportation and installment. Make sure the joints can be fastened with bolts.

<314>

<3i5> When installing the blades on the frames, make adjustment in the way that the centers of the blades and the aerogenerator 's vertical axis meet correctly. For this adjustment, allow some margin between the bearing housings and the frames ,and make sure the centers of the blades and the aerogenerator's center vertical axis meet correctly. Check if the vertical axis is vertical and check if the rotation of the blades is good, and then lastly fix the bearing housings to the frames.

<316>

<3i7> As for the electric power generating device, prepare an electric power generating device suitable for low rotation speed and high torque, typical of vertical axis aerogenerators. For optimal generation, tailor the electric power generating device to the torque and rpm of the blades as to the speed of the winds.

<318>

<3i9> The controlling part experiences the wide range in voltage and current changes due to wide swings in the speed of the winds, and so it is necessary to keep the output current and voltage at certain levels. In case the controller is installed independently, an additional battery-charging system is needed, and when the electric power generating device is installed in connection with other electric power generating device systems, the voltage and current need to be regulated and the frequency should be synchronized so that it can be used in connection with the conventional electricity systems.

<320>

<32i> Zinc-plating is required in order to prevent the rusting of the blades and the frames. Add protective anti-rust coating if the system is installed in places like coastal areas in order to protect the system from possible rusting by salt.

<322>

<323> An emergency circuit-breaking system and a lightening protection system are additionally required, and the addition of a remote-controlling system to monitor the electric power generating device's operation would be possible.

<324> [Mode for Invention]

<325> The invention hereunder generally relates to aerogenerators, and, in particular, to aerogenerators with specially-designed blades to enhance the generation efficiency through improvement of the rotation of the blades.

<326>

<327> So this invention has been suggested in order to solve the problems said above and aims to provide an aerogenerator having improved stability in high-speed operation by adopting a semi-circular blade front that reduces vibration due to shifts in wind strength and the blades position

<328>

<329> [embodiment Plan 1

<330>

<33i> Figure 1 is a perspective view of embodiment example #1 of an aerognerator following the specifications for this invention and Figure 2 is an A-A-line cross-sectional view of Figure 1.

<332>

<333> The aerogenerator of embodiment example #1 following the specifications for this invention consists of a vertical axis(lθ) mounted on a base on the ground,

<334> at least one bearing housing(20) each having its center rotatably coupled to said vertical axis(lθ), a plurality of evenly spaced connecting arms(201) each protruded from the cylindrical surface of said bearing housing(20);

<335> a plurality of blades 1 (41) fixed to each of said connecting arms (201) by some fixing means(30), and each having a groove portion(411) protruding forward and forming a semi-circle shape at the rear, and made of a curved plate(412) bending toward one direction from one tip of said groove portion(411), and bending again toward the opposite direction shaping a backward curve; and

<336> an electric power generating device(5) directly or indirectly connected to said bearing housing(20). <337>

<338> And said connecting arms(201) are composed of horizontal arms(2011) protruding from the bearing housings(20); said fixing part(30) is composed of tapping threads (301) made on the outer sides of said connecting arms(201) , holes(302) drilled onto the blades 1 (41) corresponding to said tapping threads and bolts (303) fixed into said tapping threads penetrating the holesOOl).

<339> <340> <341>

<342> And said connecting arms(201) are composed of horizontal arms(2011) protruding from the bearing housing(20); said fixing part (30) is composed of tapping threads(301) made on the outer sides of said connecting arms(201), holes(302) drilled onto the blades 1(41) corresponding to said tapping threads(301) and bolts fixed into said tapping threads penetrating the holes(302).

<343>

<344> Especially, the said vertical axis (10) is fixed to the ground with concrete or steel structures, and the bearing housings (20) rotate smoothly around the vertical axis, (10) supported by the bearings (202) installed inside the said bearing housings (10).

<345> <346>

<347> embodiment Plan 2

<348>

<349> Figure 3 shows a perspective view of another embodiment example following the specifications for embodiment example #1 of this invention, and Figure 4 is a B-B-I ine cross-sectional view of Figure 3. said blades 1 (41) include a rear protruding portion(413) having a semi-circle-shaped fixing groove(4131) on the inner side of each blade 1 (41).

<350> <35i> Said connecting arms(201) comprise of horizontal protruding arms(2012) from said bearing housing(20) and branch 1 and 2(2013,2014) diverging from the outer edge of said horizontal protruding arms(2012) where there is additionally equipped semi-circular part(2015) protruding forward from tip of said branch 2 so that the arms are held by said fixing groove(4131); said fixing means have tapping threads(304) made on the outer sides of said branch 1 and 2, and multiple holes(305) which are drilled onto said blades 1 (41) corresponding to said tapping threads(304), and multiple bolts(303) fixed into said tapping threads penetrating said holes(305).

<352>

<353> embodiment Plan 3

<354>

<355> Figure 5 represents a perspective view of another embodiment example following the specifications for embodiment example #1 of this invention. Circumferential fixing plates 1 (50) connect said blades 1 (41) together and having holes(501) in the middle, and are equipped in the lower, middle and upper sections of said blades 1 (41).

<356>

<357> That is, the upper, middle and lower parts of the said blades (41) are supported by the said circumferential fixing plate 1 (50) so that reduced wind resistance reduces vibration caused by the rotation of blades 1 (41).

<358>

<359> Impact by strong wind force can be minimized by directing wind outward through the penetration holes (501) of the said circumferential fixing plate 1 (50) when outside wind gets inside and hits the said blades 1.

<360>

<36i> Also added are fixed reinforcement plates 1 (61) which are the upper parts of the said circumferential fixing plates (50) and are protruding outward from the linking bars (201). The said fixed reinforcement plates (61) consist of horizontal plates (611) protruding horizontally and tilted plates 1 and 2 (612 and 613) which protrude in a tilted manner from the outer sides of the said horizontal plates (611) and which are fixed onto the said circumferential fixing plates (50) by bolts (8).

<362>

<363> [174] Described hereunder is the operation of the aerogenerator implemented as above following the specifications for embodiment example #1 of this invention.

<364>

<365> As shown from Figure 1 through Figure 4, when wind hits the frontal sides of blades 1 (41), the aerogenerator receives air resistance as wind pressure is distributed evenly around the said blades 1 (41).

<366>

<367> Since the frontal sides of the said blades (41) are semi-circle-shaped and protruding, resisting force of the wind is distributed evenly regardless of the strength and direction of the wind, and this reduces vibration on the blades 1 (41).

<368>

<369> This way, stability at high-speed rotation is improved by reducing vibration caused onto the said blades 1 (41).

<370>

<37i> The outer sides of the said tilted bars 2 (2014) are connected to semi¬ circle-shaped holding grooves (4131) so that lift force is formed in vertical direction which enables smooth rotation of the said blades 1 (41) and generation of electricity even when wind blows from behind.

<372>

<373> embodiment Plan 4

<374>

<375> Figure 6 represents another embodiment of circumferential fixing plates following the specifications for embodiment example #1 of this invention.

<376> Circumferential fixing plates 1 (50) of blades 1 ( 41) have groove portions (502) formed to the inner sides of the circumference corresponding to the width of middle part of said blades 1 (41). <377>

<378> Vibration caused the rotation of the blades 1 (41) is minimized by reducing the resistance of the wind force with the said concave grooves (502).

<379>

<380> Reinforcement plates 1 (61) are added in the joint of said circumferential fixing plates 1 (50) and said connecting arms(201) and as for the said reinforcement plates 1 (61), horizontally-protruding horizontal plates (611) are fixed to the said circumferential fixing plates 1 (50) with bolts (8).

<381> <382> <383>

<384> embodiment Plan 5

<385>

<386> Figure 7 shows another embodiment example of circumferential fixing plates 1 following the specifications for embodiment example #1 of this invention.

<387> Circumferential fixing plates 1 (50) are fixed at the upper, middle and lower parts of said vertical axis (10) in order that said vertical axis(lθ) penetrates the centers of the plates: said fixing plates are evenly separated, fixing the upper, or lower, or middle section of said blades 1 (41), containing multiple fixing parts(503) including convex round part(5031), multiple concave groove parts(504) which connect each said fixing parts(503) to one another and convex round parts(505) formed on the edge connecting one end of fixing parts(503) with said concave round parts(504).

<388>

<389> [185] That is, the said circumferential fixing plates (50) reduce resistance caused by wind when the said blades 1 (41) are at high-speed rotation, by means of concave-curve parts (504) and round parts (505) of the circumferential fixing plates. <390>

<39i> In addition, reinforcement plates 1 (61) which are the upper parts of the said circumferential fixing plates (50) and protrude outward from the linking bars (201) are added. The said reinforcement plates 1 (61) consist of horizontally-protruding horizontal plates (611) and tilted plates 1 and 2 (612 and 613) which protrude in a tilted manner from the outer sides of the said horizontal plates and which are fixed onto the said circumferential fixing plates 1 (50) with bolts.

<392> <393> <394>

<395> embodiment Plan 6

<396>

<397> Figure 8 shows another embodiment example of circumferential fixing plates 1 following the specifications for the embodiment example #1 of this invention.

<398> Circumferential fixing plates 1 (50) are designed to wrap said blades 1 (41) with a constant width along the cross-sections of said blades 1 (41).

<399>

<4oo> That is, distortion of blades 1 (41) caused by wind resistance force can be prevented by supporting the blades 1 (41) with the mentioned circumferential fixing plates 1 (50).

<401>

<402> [190] Also, this also improves stability in high speed operation because the semi-circle-shaped frontal parts have the effect of reducing vibration caused by changes in the positions of blades 1 and the wind strength.

<403>

<404> The invention hereunder relates to aerogenerators and in particular to aerogenerators whose blades 1 rotate smoothly by means of reducingresistance and making ease the intake of wind with blades 1 and circumferential fixing plates 2 installed at the upper, lower and middle parts of the aerogenerator.

<405>

<406> So, this invention has been suggested in order to solve the problems as above and aims to provide an aerogenerator having enhanced generation efficiency through smooth rotation of blades 1 by means of reducing air resistance and making ease the intake of wind, utilizing blades 1 and circumferential fixing plates 2 installed at the upper, lower and middle parts of the aerogenerator.

<407>

<408> embodiment Plan 7

<409>

<4io> Described hereunder is a proper embodiment example of this invention, with attached figures being used for reference.

<411>

<4i2> Figure 9 represents a perspective view of implantation example #2 of the aerogenerator following the specifications for this invention and Figure 10 gives a C-C-Iine cross-sectional view of Figure 9.

<413> <414>

<4i5> An aerogenerator of embodiment example #2 following the specifications for this invention consists of a vertical axis(lθ) mounted on a base on the ground;

<4i6> a plurality of blades 1 (41) supported and connected to said vertical axis (10) by one or more circumferential fixing plates fixed to said vertical axis(lθ);

<4i7> an electric power generating device (5) indirectly connected to said blades 1 (41) by some fixing means(30), and each having a groove portion(411) protruding forward and forming a semi-circle shape at the rear, and made of a curved plate(412) bending toward one direction from one tip of said groove portion(411), and bending again toward the opposite direction shaping a backward curve; <418>

<4i9> Said fixed circumferential plates 2 (51) are equipped at the upper, middle, and lower parts of said vertical axis(lθ) in order that the vertical axis(lθ) penetrates the centers of the plates, and where the fixed plates are evenly separated, fixing the upper, or lower, or middle section of said blades 1 (41): the aerogenerator comprises of multiple fixing parts including circular-arc parts and multiple convex round parts(5111); concave round parts(5112) facing each other; and convex round parts which connect each of said fixing parts(511).

<420> <421>

<422> Additionally, a plurality of holes(513) evenly spaced are around the central circumference of said circumferential fixing plates 2 (51).

<423>

<424> a plurality of holes (513) evenly spaced around the central circumference of said circumferential fixing plates 2 (51).

<425>

<426> [200] Especially, the mentioned circumferential fixing plates 2 (51) are firmly held to the vertical axis (10) by multiple supporting arms (5131) installed on the inner sides of the mentioned penetration holes (513).

<427>

<428> Additionally, upper and lower reinforcement rings (515 and 516), which are fixed by penetration onto the vertical axis, are attached to the upper, lower and middle sections of the mentioned circumferential fixing plates 2 (51) in order to reinforce the centers of circumferential fixing plates 2 (51).

<429>

<430> This way, the mentioned upper and lower reinforcement rings (515 and 516) help reduce the internal stress on the power-transmission parts of the mentioned circumferential fixing plates 2 (51).

<431> <432> The mentioned vertical axis (10) is fixed onto the ground by concrete or steel structures.

<433>

<434> Described hereunder is the operation of the aerogenerator following the specifications for embodiment example #2 of this invention which is implemented as above.

<435>

<436> First, the aerogenerator gets air resistance as wind pressure is distributed around the mentioned blades 1 (41) when wind blows to the frontal parts of blades 1 (41).

<437>

<438> [However, vibration caused onto the blades 1 (41) is reduced as resistance force caused by wind is distributed evenly regardless of changes in wind strength and wind direction because the frontal sides of the mentioned blades 1 (41) are semi-circle-shaped and protruding.

<439>

<440> So, stability is improved at high-speed rotation by reducing vibration caused onto the mentioned blades 1 (41).

<441>

<442> If the rotation speed of the blades 1 (41) goes up by wind, the amount of wind passing through the blades 1 (41) is reduced and this, in turn, forces the outside air to get in through circumferential fixing plates 2 (51) fixed onto the upper, lower and middle sectionsof the blades 1 (41). Then, the outside air gets in through the penetration holes (513) of the upper and lower circumferential fixing plates 2 (51) and is forced to go out through the space formed between blades 1 (41).

<443>

<444> Especially, the circumferential fixing plate 2 (51) which is fixed onto the middle of the mentioned blades 1 (41) directs outward, through the upper blades 1 (41), the air getting in through the penetration holes (513) of circumferential fixing plate 2 (51) which is fixed onto the upper parts of the mentioned blades 1 (41), directing outward through lower blades (41) the absorbed air getting in through the penetration holes (513) of the circumferential fixing plate 2 (51) which is fixed onto the lower parts of the mentioned blades 1 (41)/

<445>

<446> Vibration on blade 1 (41) is reduced by reducing wind resistance at high-speed rotation of the mentioned blades 1 (41) by means of the concave- curve parts (512) of the mentioned circumferential fixing plates 2 (51).

<447>

<448> Therefore, generation efficiency is improved by improving rotation speed of blades 1 (41) by reducing vibration on the mentioned blades 1 (41).

<449>

<450> embodiment Plan 8

<451>

<452> Figure 11 shows a perspective view of another embodiment example of an aerogenerator following the specifications for embodiment example 2 of this invention, and Figure 12 is a D-D-line cross-sectional view of Figure 11.

<453>

<454> Here, prior to describing another example of an aerogenerator for embodiment example 2 following the specifications for this invention, it is assumed hereunder in another embodiment example of this invention that the composition of the aerogenerator following the specifications for embodiment example 2 is the same except for the circumferential fixing plates 2 which will be described later.

<455>

<456> As shown in Figure 11 and Figure 12, aerogenerator according to claim 10, wherein said circumferential fixing plates 2 (51) are fixed to the vertical axis(lθ) and equipped at the upper, middle and lower parts of the vertical axis(lθ) in the way that the vertical axis(lθ) passes though the centers of the plates; comprise protruding plates evenly spaced in each circumference, fixed and separating the upper, or middle, or lower section of said blades, having holes in the middle of each circumferential fixing plate 2 , having wider outer sides and narrower inner sides, and having streamlined lateral sides (5142) .

<457> And upper and lower reinforcement rings(515,516) are passed through by vertical axis(lθ), and reinforcing the center of said circumferential fixing plates 2 (51).

<458>

<459> Described hereunder is the operation of the aerogenerator implemented according to embodiment example #2 of this invention which is implemented as above.

<460>

<46i> First, the aerogenerator gets air resistance as wind pressure is distributed around the mentioned blades 1 (41) when wind blows to the frontal parts of blades 1 (41).

<462>

<463> However, vibration caused onto the blades 1 (41) is reduced as resistance force caused by wind is distributed evenly regardless of changes in wind strength and wind direction because the frontal sides of the mentioned blades 1 (41) are semi-circle-shaped and protruding.

<464>

<465> So, stability is improved at high-speed rotation by reducing vibration caused onto the mentioned blades 1 (41).

<466>

<467> Protruding plates (514), shaped as plates, form structures which improve stability with centrifugal force at high-speed rotation and endure strong outside impact caused by wind.

<468>

<469> Especially, vibration caused by rotation of blades 1 (41) is reduced by reducing wind resistance with circumferential fixing plates 2 (51) supporting the upper, lower and middle sections of the mentioned blades 1 (41).

<470> <47i> Impact by strong wind can be minimized by directing the wind outward through penetration holes (5141) of protruding plates (514) when wind from outside gets in and hits the inner sides of the mentioned blades 1 (41).

<472>

<473> As described above, the aerogenerator of this invention has the advantage of increased generation efficiency through smooth rotation of rotation blades 1 by reducing air resistance and making ease the intake of air through circumferential fixing plates which are fixed onto the upper, lower and middle parts of blades 1.

<474>

<475> This invention hereundergeneral Iy relates to aerogenerators and in particular to aerogenerators with specially-designed blades to enhance the generation efficiency through improvement of the rotation of the blades.

<476>

<477> Here, the purpose of this invention is to provide an aerogenerator the frontal parts of which are streamline-shaped so that air resistance is reduced and whose generation efficiency of the blades is increased by evenly distributing wind resistance using semi-circle-shaped grooves.

<478>

<479> embodiment Plan 9

<480>

<48i> The invention is described hereunder, with attached figures used as reference.

<482>

<483> Figure 13 is a perspective view of embodiment example#3 of an aerogenerator following the specifications for this invention, and Figure 14 is an E-E-I ine cross-sectional view of Figure 13.

<484>

<485> An aerogenerator of embodiment example #3 following the specifications for this invention consists of a vertical axis(lθ) mounted on a base on the ground; <486> one or more bearing housings(20) each having its center rotatably coupled to said vertical axis(lθ), and having a plurality of evenly spaced connecting arms(201) each protruded from the cylindrical surface of said bearing housing(20);

<487> a plurality of blades 1 (41) fixed to said connecting arms(201) with fixing means(30); and an electric power generating device(5) directly or indirectly connected to said bearing housings(20) by some fixing means(30).

<488> Said blade 1 (41)has streamlined and protruding front sides allowing the rear to have semi-circle-shaped groove portion(411); made of a curved plate bending toward one direction from one tip of said groove portion, and bending again toward the opposite direction shaping a backward curve;

<489> <490>

<49i> And said connecting arms(201) are composed of horizontal plates protruding from the bearing housing(20); said fixing means(30) are composed of tapping threads(301) made on the outer sides of said connecting arms(201), holes(302) drilled on the blades 1 (41) corresponding to said tapping threads(301), and bolts fixed into said tapping threads penetrating said holes(302).

<492>

<493> Especially, the said vertical axis (10) is fixed to the ground with concrete or steel structures, and the bearing housings (20) rotate smoothly around the vertical axis, (10) supported by the bearings (202) installed inside the said bearing housings (20).

<494>

<495> embodiment Plan 10

<496>

<497> Figure 15 shows a perspective view of another embodiment example following the specifications for embodiment example #3 of this invention, and Figure 16is a F-F-Iine cross-sectional view of Figure 15 where the inner sides of the blades 1 (41) are equipped with rear protruding parts(413) containing semi-circle-shaped fixing groove(4131)

<498>

<499> The aerogenerator further comprises protrudent semi-circular parts protruding forward from tip of said branch 2 (2014)so that the arms are held by said fixing groove(4131); but said connecting arms consist of horizontal protruding arms projected from said bearing housings(20) and branch 1 and 2(2013,2014) protruding the outer edge of said horizontal protruding arms(201).

<5oo> Said fixing means(30) have tapping threads(304) made on the outer sides of said branch 1 and 2(2013,2014), and multiple holes(305) which are drilled onto blades 1 (41) which correspond to said tapping threads(304), and multiple bolts fixed into said tapping thread penetrating said holes(305).

<501>

<502> embodiment Plan 11

<503>

<504> Figure 17 represents a perspective view of another embodiment example following the specifications for embodiment example #3 of this invention. The aerogenerator further comprises circumferential fixing plates 1 (50) connecting the upper, lower and middle sections of said blade 1 (41) together, and having holes (501) in the middle.

<505>

<506> That is, the upper, middle and lower parts of the mentioned blades (41) are supported by the mentioned circumferential fixing plate 1 (50) so that reduced wind resistance reduces vibration caused by the rotation of blades 1 (41).

<507>

<508> Impact by strong wind force can be minimized by directingwind outward through the penetration holes (501) of the mentioned circumferential fixing plate 1 (50) when outside wind gets inside and hits the mentioned blades 1.

<509>

<5io> Described hereunder is the operation of the aerogenerator implemented as above following the specifications for embodiment example #3 of this invention.

<5ii> As shown from Figure 13through Figure 16, when wind hits the frontal sides of blades 1 (41), the aerogenerator receives air resistance as wind pressure is distributed evenly around the mentioned blades 1 (41).

<512>

<5i3> However, since the frontal sides of the mentioned blades (41) are streamline-shaped, wind resistance force is reduced and so the blades 1 (41) rotate smoothly.

<514>

<5i5> Generation efficiency is enhanced because wind resistance is evenly distributed by way of semi-circle-shaped grooves (411) which are formed on blades 1 (41).

<516>

<5i7> The outer sides of the mentioned tilted bars 2 (2014) are connected to semi-circle-shaped holding grooves (4131) so that lift force is formed in vertical direction which enables smooth rotation of the mentioned blades 1 (41) and generation of electricity even when wind blows from behind.

<518>

<5i9> As described above, the aerogenerator of this invention has the advantage of increased generation efficiency for blades 1 by making wind resistance evenly distributed by way of semi-circle-shaped grooves and by reducing air resistance by having a streamline-shaped front.

<520>

<52i> The invention hereundergenerally relates to aerogenerators and in particular to aerogenerators with sphere-shaped multiple blades 2 designed and installed in order to reduce air resistance and increase generation efficiency.

<522>

<523> Here, the purpose of this invention is to provide an aerogenerator the frontal parts of which are streamline-shaped so that air resistance is reduced and whose generation efficiency of the blades is increased by evenly distributing wind resistance using semi-circle-shaped grooves.

<524>

<525> This invention has been made in order to solve the problems as above and it aims to provide an aerogenerator having enhanced generation efficiency through smooth rotation of blades 2 by means of reducing air resistance by making blades 2 sphere-shaped where the outer sides of the blades are elliptical sphere-shaped and the inner sides are circular-shaped.

<526>

<527> To achieve the goals as above, this invention consists of a vertical axis mounted on a base on the ground, a plurality of blades 2 connected by connecting arms protruding from the outer circumference of said vertical axis, and rotation by wind power, and an electric power generating device connected to said bearing house.

<528> Said blade comprises a groove portion protruding forward and forming a semi-circle shape at the rear, and made of a curved plate bending toward one direction from one tip of said groove portion, and bending again toward the opposite direction shaping a backward curve;

<529> but the width of the curve gets narrower at both ends of the curved plate, and the combination of said blades is characterized by outer side's elliptic sphere shape and inner sides' sphere shape.

<530> <531> <532> <533> <534> <535>

<536> embodiment Plan 12

<537>

<538> Described hereunder is an example of a proper embodiment of this invention, with the attached figures as reference. <539>

<540> Figure 18 is a perspective view of embodiment example 4 of an aerogenerator following the specifications for this invention and Figure 19 is a G-G-I ine cross-sectional view of Figure 19.

<541>

<542> The aerogeneator in this invention consists of a vertical axis(lθ) mounted on a base on the ground, a plurality of blades 2 (42) connected by connecting arms(71) protruding from the outer circumference of said vertical axis(lθ), and rotation by wind power, and an electric power generating device (5) connected to said bearing house.

<543> Said blade 2 (42) comprises a groove portion(411) protruding forward and forming a semi-circle shape at the rear, and made of a curved plate(412) bending toward one direction from one tip of said groove portion(411), and bending again toward the opposite direction shaping a backward curve!

<544> but the width of the curve gets narrower at both ends of the curved plate, and the combination of said blades 2 (42) is characterized by outer side's elliptic sphere shape and inner sides' sphere shape.

<545>

<546> Additionally, a reinforcement fixing plates 2 (62) are added to the connecting part of said blades 2 (42) and connecting arms(71) . So the above-mentioned blades 2 (42) are firmly held by reinforcing the strength of the linking edges of the linking bars (71) through the use of the above- mentioned reinforcement plates 2 (62).

<547>

<548> Especially, the above-mentioned vertical axis (10) is fixed to the ground and concrete or steel structures could be used to fix it.

<549>

<550> Described hereunder is the operation of an aerogenerator implemented according to embodiment example 4 of this invention assembled as above.

<551>

<552> First, when wind blows in the direction of blades 2 (42), wind pressure gets distributed around the mentioned blades 2 (42), causing air resistance.

<553>

<554> Vibration caused onto blades 2 (42) is reduced because resistance coefficient by wind is kept small regardless of changes in wind strength and direction since the mentioned blades 2 (42) is sphere-shaped.

<555>

<556> That leads to improved stabilityat high-speed rotation through increased speed and torque and reduced air resistance by wind.

<557>

<558> And the blades can rotate smoothly even with weakwind force because torque by wind is increased by adopting a wider width for the middle section of a blade 2 (42) than for the upper and lower sections.

<559>

<560> Furthermore, torque by wind is maximized by having wind pressure concentrated on the middle section of blades 2 (42) by directing wind hitting the upper part of a blade 2 (42) through the length of the blade to its middle section.

<561>

<562> In addition, wind hitting the rear sides of curved panels (422), which are part of blades 2 (42), goes to the middle sections of the blades 2 (42) and then gets outside after pushing the rear sides of the blades 2 (42). Wind hitting the protruding grooves (421) of the blades 2 (42) also gets concentrated onto the middle sections of the blades 2, pushes the blades 2 (42), and then gets outside.

<563>

<564> In this way, a stable rotation of the blades 2 (42) is made, by making wind hitting the blades 2 (42) go out smoothly.

<565>

<566> embodiment Plan 13

<567>

<568> Figure 20 is an H-H-I ine cross-sectional view of Figure 21 and Figure 22 is a J-J-I ine cross-sectional view of Figure 20.

<569>

<570> As show from Figure 20 to Figure 22, fixing plates (52) supporting said blades 2 (42) are added between said blades 2 (42) and connecting arm (71).

<571>

<572> And reinforcement fixing plates 2 (62) are added at the joint of said fixing plates(52) and connecting arms(71). The mentioned reinforcement plates 2 (62) consist of horizontally-protruding bars (621) and tilted bars 1 and 2 (622 and 623) which protrude from the outer sides of the protruding bars (621) and then to two sides in a tilted manner, and are fixed onto the mentioned fixed plates (52) by fixtures.

<573>

<574> And the above-mentioned linking bars are composed of holes (624) drilled on the outer sides of the above-mentioned tilted bars 1 and 2 (622 and 623), multiple tap holes (522) drilled on the mentioned fixed plates (52) in the way that the tap holes correspond to the above-mentioned holes (624), and multiple bolts (8) inserted into the mentioned tap holes (522) after going through the mentioned holes (624).

<575>

<576> Especially, the fixed plates (52) installed on the middle of the above- mentioned blades 2 (42) direct the air getting into the penetration holes (521) of the fixed plates (52) installed on the upper parts of the mentioned blades 2 (42) through the blades 2 of the upper part and then outside, and direct the air getting into the penetrationholes (521) of the fixed plates (52) installed on the lower parts of the mentioned blades 2 (42) through the blades 2 of the lower part and then outside.

<577>

<578> embodiment Plan 14

<579>

<580> Figure 23 is a top view showing another embodiment example of a fixing plate according to embodiment example 5 of this invention. Said fixing plate(52) of the blade concave groove ρortion(523) from the circumference to the inner side is formed corresponding to the width of the middle of said blade 2 (42).

<581> <582> <583>

<584> In this way, vibration is minimized when blades 2 (42) rotate by reducing wind resistance through the use of the mentioned concave grooves (523)

<585>

<586> embodiment Plan 15

<587>

<588> Figure 24 is a top view of another embodiment example of a fixing plate according to embodiment example 5 of this invention. Fixing plates (52) are fixed at the upper, middle and lower parts of said vertical axis(lθ) in order that said vertical axis penetrates the centers of the plates: said fixing plates are evenly separated, fixing the upper, or lower, or middle section of said blades 2 (42) , containing multiple fixing parts including convex round part(525), multiple concave groove parts which connect each said fixing parts(524) to one another and convex round parts(526) formed on the edge connecting one end of fixing parts with said concave round parts(525).

<589>

<590> Vibration on blades 2 (42) is reduced by reducing wind resistance at high-speed rotation of the mentioned blades 2 (42) through the use of the round parts (526) and concave-curved parts (525) of the mentioned fixed plates (52)

<591>

<592> embodiment Plan 16

<593>

<594> Figure 25 shows a top view of another example of a fixing plate according embodiment example 5 for this invention. Fixing plates(52) are designed to wrap said blades 2 (42) with a constant width along the cross- sections of said blades 2 (42).

<595>

<596> Distortion of blades 2 due to wind resistance can be prevented by having the mentioned fixed plates support blades 2 (42).

<597>

<598> As mentioned above, the aerogenerator according to this invention has blades 2 shaped like elliptical spheres on their outer sides and circle- shaped on their inner sides so that air resistance is reduced resulting in enhancement of generation efficiency through smooth rotation of the blades 2.

<599>

<6oo> The invention hereunder relates to aerogenerators, and in particular to an aerogenerator that receives low air resistance by having wind pressure dispersed.

<601>

<602> So, this invention has been made in order to solve the problems as above and it aims to provide an aerogenerator with enhanced generation efficiency by receiving less air resistance by dispersing wind pressure.

<603>

<604> To achieve the goals as described above, the aerogenerator according to this invention includes a vertical axis, a plurality of blades connected and fixed to said vertical axis by fixing means;

<605> an electric power generating device connected to the circumference of said vertical axis by one or more fixing plates linked to the vertical axis and producing electromotive force through the rotation of the blades 3; and

<606> the said blades 3 each having a groove portion protruding forward and forming a semi-circle shape at the rear, and made of a curved plate bending toward one direction from one tip of said groove portion, and bending again toward the opposite direction shaping a backward curve; and symmetrically slant blade 3 having protruding middle part of blades toward one direction. <607> <608> <609> <610> <611>

<6i2> The aerogenerator according to claim 26, wherein said fixing plates are characterized by:

<6i3> being placed in the upper, and lower parts of the blades whose center is penetrated by said vertical axis comprising a plurality of fixing parts including one side of circular arch part, and the dixinvis evenly spaced around the each blade and fixed as fixing blocks the upper, lower, and middle parts

<6i4> composed of a plurality of blades made of curved plates bending toward one side from one tip of said groove and then bending toward the opposite side comprising a plurality of a concave round part at the one side of said each fixing part, and connecting said each fixing part; and comprising a convex round part formated at the edge of said concave round part and on end at the fixing part.

<615>

<6i6> embodiment Plan 17

<617>

<6i8> Described hereunder is the invention with figures as reference.

<619>

<620> Figure 26 represents a perspective view of embodiment example 6 of an aerogenerator according to this invention. Figure 27 is a top view of embodiment example 6 of an aerogenerator according to this invention. Figure 28 is a K-K-I ine cross-sectional view of Figure 26.

<621>

<622> As described in Figure 26 and Figure 27 , the aerogenerator comprising: <623> a vertical axis(lθ), a plurality of blades 3 (43) connected and fixed to said vertical axis by fixing means(63), an electric power generating device(5) connected to the circumference of said vertical axis(lθ) by one or more fixing plates(53) linked to the vertical axis(lθ) and producing electromotive force through the rotation of the blades 3 (43); and the said blades 3(43) each having a groove portion(4311) protruding forward and forming a semi-circle shape at the rear, and made of a curved plate (4312) bending toward one direction from one tip of said groove portion, and bending again toward the opposite direction shaping a backward curve! and symmetrically slant blade having protruding middle part of blades toward one direction.

<624>

<625> The above-mentioned blades 3 (43) consist of grooves (4311) having semi-circle-shaped and protruding fronts and elliptical-shaped rears and curved plates (4312) which are curved in one direction from the other parts of the mentioned grooves (4311) and then protrude backwards in a curved manner.

<626>

<627> Additionally, a plurality of sub-blades 3 (4313) are positioned in the inner side at various heights in the outer side of said blades part (431).

<628>

<629> This way, wind resistance force is evenly dispersed around space between the mentioned horizontal blades 3 (4313) when outside wind hits the mentioned horizontal blades 3 since the blades 3 constitute multiple stages.

<630>

<63i> The above-mentioned fixed plates (53) include a penetration holes (534) drilled on the center in the way that the holes pass through the mentioned vertical axis (10).

<632>

<633> The mentioned fixed plates 2 (53) are evenly separated blocking the upper, or lower, or middle section of the mentioned blades 3 (43) and have multiple fixing parts (531) including one-sided circular-arc parts (5311) and multiple concave-curve parts (532) which connect each other of the mentioned fixing parts (531) and are attached to one sides of the mentioned fixing parts (531). The aerogenerator also includes round parts (533) formed on edges connected to the other sides of the mentioned concave-curve parts (532) and fixing parts (531).

<634> [28] Said fixing plates 2 (53) are characterized by being placed in the upper, and lower parts of the blades 3 (43) whose center is penetrated by said vertical axis comprising a plurality of fixing parts(531) including one side of circular arc part(5311), and the fixing part(531) evenly spaced around the each blade 3 (43) and fixed as fixing blocks the upper, lower, and middle parts composed of a plurality of blades 3 (43) made of curved plates bending toward one side from one tip of said groove and then bending toward the opposite side comprising a plurality of a concave round part (532)at the one side of said each fixing part, and connecting said each fixing part(531); and comprising a convex round part formated at the edge of said concave round part and on end at the fixing part(531).

<635>

<636> So vibration on blades 3 (43) is reduced by reducing air resistance by dispersing wind pressure at high-speed rotation of mentioned blades 3 (43) through the use of the concave-curve parts (532) and round parts (533) of the mentioned fixing pales 2 (53).

<637>

<638> Also, said fixing means(63) comprises bearing housings(631) around the outer part of said vertical axis(lθ), and a plurality of connecting arms(632) linked to said bearing housing at one tip, protruding outward, and linked and fixed to said fixing plate 2 (53) at the other tip.

<639> <640> <641> <642>

<643> The mentioned rotation brackets (631) have penetration holes (6311) penetrating the mentioned vertical axis (10) and are fixed to the mentioned liking bars (632) with liking methods such as bolts.

<644>

<645> Bolts are also used in connecting the edges of the mentioned liking bars (632) with the mentioned fixed plates 2 (53).

<646>

<647> embodiment Plan 18

<648>

<649> And a middle fixing part (64) is positioned at the middle part of said vertical axis (10) and blades 3 (43).

<650>

<65i> [305] And said middle fixing part(64) comprises a bearing housing(641) around the outer part of said axis, brackets fixed to each blade 3 (43) , and connecting arms (643) linking said bearing housing(641) and brackets (642).

<652>

<653> The mentioned fixed brackets (642) consist of horizontally-protruding protruding parts(6421) and reinforcement parts (6422) for blades 3, reinforcing the middle sides of the blades 3 (43), which are extended from the outer sides of the mentioned protruding parts (6421) and which are shaped the same as the mentioned blades 3 (43).

<654>

<655> The mentioned rotation brackets (641) are connected to the mentioned liking bars (643) and fastened with bolts.

<656>

<657> Described hereunder is the operation of the aergogenerator implemented according to the invention as above.

<658>

<659> As shown in Figures 26 to 28, when outside wind is induced to blades 3 (43), the aerogenerator receives air resistance with the wind pressure dispersed around the mentioned blades 3 (43).

<660> <66i> Air resistance is reduced through the use of the blades 3 (43) which include protruding blades (431) tilted against each other in a symmetrical manner on their middle sides, and this results in enhanced generation efficiency.

<662>

<663> That is, vibration is reduced which is caused onto the blades 3 (43) by having wind pressure evenly dispersed by the mentioned blades (431) when wind hits the frontal sides of the blades 3 (43).

<664>

<665> This way, distortion or destruction of the upper parts of blades 3 (43) by wind force can be prevented, and wind resistance is reduced and speed and torque are increased resulting in enhancement of stability at high-speed rotation.

<666>

<667> As described above, the aergogenerator in this invention has the advantage of enhanced generation of efficiency by receiving less air resistance through the dispersion of wind pressure.

<668>

<669> The invention hereunder relates to blades of aerogenerators and their embodiment methods, and in particular to rotation blades 4 of aerogenerators having reduced air resistance by passing wind through holes formed on one sides of blades 4 and their embodiment methods.

<670>

<67i> The invention here has been made to solve the problems as above and it aims to provide blades 4 of aerogenerators having reduced air resistance by passing wind through holes formed on one sides of blades 4 and their embodiment methods.

<672>

<673> And it aims to provide blades 4 of an aerogenerator having reduced air resistance at high-speed rotation by including concave grooves having holes on one sides of the blades 4 and their embodiment methods. <674>

<675> It also aims to provide blades 4 of anaerogenerator having reduced air resistance by reducing drifting effect on blades 4 through the use of wrinkles formed on one sides of blades 4 and their embodiment methods.

<676>

<677> embodiment Plan 19

<678>

<679> Described hereunder is a proper embodiment example for this invention, with the attached figures as reference.

<680>

<68i> Figure 29 shows a perspective view of blades 4 in actual use of the aerogenerator of embodiment example 7 according to this invention. Figure 30 is an L-L-I ine cross-sectional view of Figure 29.

<682>

<683> As shown in Figure 29 and Figure 30, the aerogenerator of embodiment example 7 according to this invention consists of a vertical axis (11) mounted on the base on the ground, multiple blades connected to the circumference of said vertical axis (11) by some fixing means, each having a groove portion(441) protruding forward and forming a semi-circle shape at the rear, and made of a curved plate (442) bending toward one direction from one tip of said groove portion(441), and bending again toward the opposite direction shaping a backward curve, and an electric power generating device (5) connected to a bearing housing; and a plurality of blades with multiple holes (4421) at one part of groove portion and curved plates, which is one side of said blades 4 (44).

<684>

<685> Especially, the mentioned linking fixtures consist of rotation brackets (111) including bearings (1111) installed outside in order to reduce friction caused by the rotation of the mentioned vertical axis (11), and multiple liking bars (1112) which are installed on the outer sides of the mentioned rotation brackets (111) and are connected to blades 4 (44). <686>

<687> As for the mentioned rotorblades 4 (44), the grooves (441) and curved panels (442) are formed by bending flat panels with the help of steel-panel- bending machines after drilling multiple penetration holes (4421) on flat pane1s.

<688>

<689> embodiment Plan 20

<690>

<69i> Figure 31 is a top view of blades 4 of an aerogenerator of embodiment example 8 according to this invention.

<692>

<693> As shown in Figure 31, the aerogenerator of embodiment example 8 according to this invention consists of a vertical axis(ll) mounted on the base on the ground,

<694> multiple blades 4 (44) connected to the circumference of said vertical axis by some fixing means, each having a groove portion(441) protruding forward and forming a semi-circle shape at the rear, and made of a curved plate(442) bending toward one direction from one tip of said groove portion(441), and bending again toward the opposite direction shaping a backward curve, an electric power generating device(5) connected to a bearing housing, and a plurality of blades 4 (44) with multiple groove parts at one part of groove portion and curved plates, which is one side of said blades 4 (44).

<695>

<696> The mentioned linking fixtures consist of rotation brackets (111) including bearings (1111) installed outside in order to reduce friction caused by the rotation of the mentioned vertical axis (11), and multiple liking bars (1112) which are installed on the outer sides of the mentioned rotation brackets (111) and are connected to blades 4 (44).

<697>

<698> Said groove part (443) has a curved shape, and the outer side of the groove is wide, and the inner side is narrow.

<699> Caulking chisels are used to make the mentioned concave grooves (443) and the caulking work is done after putting in cylindrical-shaped solid Styrofoam or urethane material in the grooves (441) in order to prevent distortion of blades 4 (44).

<700>

<70i> Especially, it is recommend to form the mentioned holes (4431) using sharp tools such as nails. Here, in Figure 32, the mentioned holes (4431) formed by the use of tools are cross-shaped, but they can be of variousshapes other than a cross such as a circle, a rectangular or a triangle.

<702>

<703> This way, air flow is made easy from the outside to the inside of the mentioned concave grooves (443) and so wind resistance is reduced, resulting in better endurance of the blades 4 (44), by enhancing the strength of the blades with the mentioned concave grooves (443).

<704>

<705> embodiment Plan 21

<706>

<707> Figure 32 is a process mapfor forming blades 4 of an aerogenerator for embodiment example 9 according to this invention. Figures from 33 to 35 show each stage of the forming methods for blades 4 of an aerogenerator for embodiment example 9, with figure 33 showing stages of forming concave grooves and figure 34 showing stages of forming holes. Figure 35 shows stages of forming holes on concave grooves of blades 4.

<708>

<709> As shown in figures 32 to 35, the forming methods for blades 4 of an aerogeneratorof embodiment example 9 according to this invention consist of a stage (100) of forming blades 4 (44) constituted by curved panels (442) having semi-circular grooves (441) formed by bending work from flat panels and then curved toward the frontal direction from the rear sides of the mentioned grooves (441) in a protruding manner, a stage (200) of forming semi-circle-shaped concave grooves (443) by multiple caulkings on the mentioned blades 4 (44), and a stage (300) completing the blades 4 (44) of the aergogenerator by forming holes (4431) by passing a sharp tool through the mentioned concave grooves (443).

<710>

<7ii> As shown in Figure 33, at the stage (1100) forming blades 4 (44) with bending work on flat panels, semi-circle-shaped grooves (441) are formed through the bending work of a steel-bending machine on an appropriate-sized panel, and then the grooves are curved in the frontal direction so that they protrude from the rear sides to the other sides and then curved toward the rear forming blades 4 composed ofcurved panels (442).

<712>

<7i3> As shown in Figure 34, at the stage (4400) formingconcave grooves (443) on blades 4 (44), multiple concave grooves (443) are formed on blades 4 (44) using caulking chisels (72) after applying shock-absorbing material such as cylindrical-shaped solid Styrofoam or urethane in the mentioned grooves (441) so that possible distortion of blades 4 (44) caused by shock when forming concave grooves on blades 4 (44) can be prevented.

<714>

<7i5> Especially, the mentioned concave grooves (443) are semi-circle-shaped and so air flow is made easy to one direction of blades 4 (44) by the mentioned concave grooves (443) and air resistance is reduced, resulting in stable rotation as air resistance to one sides of blades 4 (44) at high-speed rotation of blades 4 (44) is reduced.

<716>

<7i7> Also, the mentioned concave grooves (443) are formed in the way that the outer sides are wide and the inner sides are narrow, so air resistance outside of the concave grooves (443) with wide receiving area is reduced and air getting inside of the blades 4 (44) gets outside in a reduced quantity.

<718>

<7i9> As shown in Figure 35, at the stage (300) completing blades 4 (44) of the aerogenerator , penetration holes (4431) are formed by passing a nails through multiple concave grooves (443) formed on blades 4 (44). The mentioned holes (4431) can have various shapes including a cross, a circle, a rectangular, a triangle and so on.

<720>

<72i> embodiment Plan 22

<722>

<723> Figure 36 is a perspective view of the blades 4 in actual use of the aerogenerator of embodiment example 10 according to this invention, and Figure 37 is an M-M cross-sectional view of Figure 36.

<724>

<725> As shown in Figure 36 and Figure 37, the aerogenerator of embodiment example 10 according to this invention consists of a vertical axis (11) mounted on the base on the ground, multiple blades 4 (44) connected to the circumference of said vertical axis(ll) by some fixing means, each having a groove portion(441) protruding forward and forming a semi-circle shape at the rear, and made of a curved plate(442) bending toward one direction from one tip of said groove portion(441), and bending again toward the opposite direction shaping a backward curve, an electric power generating device (5) connected to a bearing housing, and

<726> a plurality of wrinkled blades (444) with multiple groove parts including holes(4441) in the middle of the inner side at one part of groove portion and curved plates, which is one side of said blades 4 (44).

<727>

<728> Drifting effect due to the rotation of blades 4 (44) is reduced with the help of the wrinkles (444) of the mentioned blades 4 (44), lowered boundary layers reduce air resistance, and outside wind passes in great quantity through the wrinkles (444) of blades 4 (44) reducing air resistance, and wind in the inner sides of the blades 4 (44) passes in small quantity but with high directivity thus increasing generation power.

<729> <730> Especially, the mentioned linking fixtures consist of rotation brackets (111) including bearings (1111) installed outside in order to reduce friction caused by the rotation of the mentioned vertical axis (11), and multiple liking bars (1112) which are installed on the outer sides of the mentioned rotation brackets (111) and are connected to blades 4 (44).

<731>

<732> The mentioned blades 4 (44) consist of reinforcement mesh (447) reinforcing the mentioned blades 4 (44), installed between inner and outer plates (445 and 446) and the mentioned inner and outer plates (445 and 446).

<733> [345] And said blade 4 (44) comprises an outer plate(445) and an inner plate(446), and a reinforcement net(447) placed between said outer and inner plates so as to reinforce said blade 4 (44).

<734>

<735> This way, the reinforcement mesh (447) installed between the mentioned inner and outer walls (445 and 446) prevents distortion or breaking of the blades 4 (44) due to wind resistance force.

<736>

<737> As mentioned above, the blades 4 of the aerogenerator according to this invention and their forming methods have the effect of reducing air resistance by passing air through the penetration holes formed in one sides of blades 4.

<738>

<739> And concave grooves formed on one sides of blades 4 including holes have the effect of reducing air resistance at high-speed rotation.

<740>

<74i> Also, the wrinkles formed on one sides of blades 4 have the effect of reducing air resistance by reducing drifting effect by blades 4.

<742>

<743> Described in the embodiment examples hereunder is making blades.

<744>

<745> embodiment Plan 23 <746>

<747> The blades of the aerogenerator according to embodiment example 1, as shown in figures 1 to 8, consist of grooves having protruding semi-circle- shaped fronts and semi-circle-shaped rears, and curved panels which are curved from one sides of the mentioned grooves toward one sides and then curved to the other sides in a curved manner and to the rear sides.

<748>

<749> The above-mentioned blades have the same cross sections and are lined in the vertical direction to the cross sections, so rolling, press, FRP molding, FRP projection molding and aluminum pressing molding are possible.

<750>

<75i> For rolling and press, the semi-circular parts of the fronts are made of thin steel or aluminum panels by rolling and bending, and the rear curved panels are formed by pressing with a press or bending methods.

<752>

<753> As for FRP molding, eithermethods can be used of making urethane molds with a 3-dimensional wooden-mold machine and making FRP master molds using the urethane molds or projection molding after making woodenmolds as used in the production of propellers for airpanels.

<754>

<755> As for aluminum pressing molding, pressing molds are made after making steel molds for cross-sectional shapes of the blades.

<756>

<757> The fixed plates for the blades are connected in the way that grooves shaped like the cross sections of the blades are formed on the plates and the grooves of the blades are connected to them, and then fastened by welding or using L-shaped brackets fastened with bolts or rivets.

<758>

<759> Connections between liking bars and blades are fastened with bolts or rivets for easy replacement later.

<760> <76i> embodiment Plan 24

<762>

<763> Figures 18 to 25 show blades of the aerogenerator according to embodiment examples 4 and 5 that consist of grooves with protruding semi¬ circle-shaped fronts and semi-circle-shaped rears, and curved panels each of which starts to be curved in one direction from one end of each of the mentioned grooves and then in another direction toward the rear in the way that the ending curve protrudes backwards where the width of a curved panel gets narrower as it goes from the upper end to the lower end. The mentioned blades have elliptical-sphere-shaped outer sides and circular-sphere-shaped inner sides.

<764>

<765> The above-mentioned blades are made in a pair with each symmetricalto each other at the center, and are formed by such methods as FRP molding, FRP projection molding, aluminum projection molding and plastic projection molding.

<766>

<767> The mentioned blades have a beautiful exterior view so it is recommended to install them where external appearance is important.

<768>

<769> embodiment Plan 25

<770>

<77i> The blades of the aerogenerator according to embodiment example 6 as shown in Figure 26 to 28 have grooves with protruding semi-circle-shaped fronts and semi-circle-shaped rears, curved plates which are curved from the othersides of the mentioned grooves toward one sides and then protrude toward the rear in a curving manner, and blades with the center protruding toward one side, tilted against each other in a symmetrical manner.

<772>

<773> The above-mentioned blades are made in a pair with each symmetricalto each other at the center, and are formed by such methods as FRP molding, FRP projection molding, aluminum projection molding and plastic projection molding.

<774>

<775> Since the above-mentioned blades have the same tilted shapes from the top to the bottom, so as for large-sized blades, blades can be made by connecting small parts.

<776>

<777> embodiment Plan 26

<778> Figures 29 to 30 show the blades of an aerogenerator according to embodiment plan 7. The blades have grooves with protruding semi-circle-shaped fronts and semi-circle-shaped rears, curved plates which are curved from the other sides of the mentioned grooves toward one sides and then protrude toward the rear in a curving manner, multiple penetration holes formed on some parts of the curved panels and grooves which are part of the blades.

<779>

<780> The mentioned blades are made by bending after forming multiple penetration holes on flat panels.

<781>

<782> embodiment Plan 27

<783>

<784> Figures 31 to 35 show the blades of an aerogenerator according to embodiment plans 8 and 9. The blades have grooves with protruding semicircle-shaped fronts and semi-circle-shaped rears, curved plates which are curved from the othersides of the mentioned grooves toward one sides and then protrude toward the rear in a curving manner, multiple concave grooves formed on some parts of the curved panels and grooves which are part of the blades.

<785>

<786> The above-mentioned blades are made of steel material and made with rolling, pressing and aluminum pressing molding. Caulking work using caulking chisels after placing cylindrical-shaped Styrofoam ad urethane in the grooves will prevent distortion. <787>

<788> The mentioned concave grooves have wide outer sides and narrow inner sides.

<789>

<790> embodiment Plan 28

<791>

<792> Figures 36 to 37 show the blades of an aerogenerator according to embodiment plan 10. The blades have grooves withprotruding semi-circle- shaped fronts and semi-circle-shaped rears, curved plates which are curved from the othersides of the mentioned grooves toward one sides and then protrude toward the rear in a curving manner, multiple wrinkles including holes formed on the inner sides of the curved panels and grooves which are part of the blades.

<793>

<794> The above-mentioned blades are made with such methods as FRP projection molding or aluminum projection molding.

<795>

<796> embodiment Plan 29

<797>

<798> Since an aerogenerator is exposed to the external natural environment, sun heat, temperature change, snow and rain, dust, salt are taken into consideration, so bearings, lubrication material, paint and various kinds of parts and material are applied to protect an aerogenerator. Anti-loose gaskets need to be used for bolts against vibration onto the structure.

<799>

<8oo> embodiment Plan 30

<801>

<802> As for the structure frame supporting the blades, truss structures need to be used for large-sized blades and bepieced together at the site after being transported by trucks, and for small-sized lamp-post-style cases, install the blades part on one pole. <803>

<804> This invention has been described referring to the attached figures, focusing on proper embodiment examples. However, it is obvious that any experienced person working in this field may use this invention to many various applications without going beyond the scope of this invention. Therefore, the scope of this invention should be interpreted as including many such variations of examples within the scope of the described claim. [Industrial Applicability]

<805> An aerogenerator is a device to produce electricity by using wind energy, and there is more and more need for the use of aerogenerators as oil prices soar and environmental concerns as to the use of fossil energy grow.

<806>

<807> The mentioned aerogenerators, as vertical aerogenerators, have the capacity to be used for a variety of places and purposes, installed in places like homes, factories, lamp posts, building tops, coastal areas, islands, and ships, and even small-sized aerogenerators can be used inside tunnels to light up the dark tunnels if only there is sustained wind. [Sequence List Text]

<808> NONE

Claims

[CLAIMS] [Claim 1]
An aerogenerator comprising: a vertical axis mounted on a base on the ground; at least one bearing housings each having its center rotatably coupled to said vertical axis! a plurality of evenly spaced connecting arms each protruded from the cylindrical surface of said bearing housing; a plurality of blades fixed to each of said connecting arms by some fixing means, and each having a groove portion protruding forward and forming a semi-circle shape at the rear, and made of a curved plate bending toward one direction from one tip of said groove portion, and bending again toward the opposite direction shaping a backward curve; and an electric power generating device directly or indirectly connected to said bearing housings.
[Claim 2]
The aerogenerator according to claim 1, further comprising a rear protruding portion having a semi-circle-shaped fixing groove on the inner side of each blade.
[Claim 3]
The aerogenerator according to claim 1, wherein said connecting arms are composed of horizontal arms protruding from the bearing housing; said fixing part is composed of tapping threads made on the outer sides of said connecting arms, holes drilled onto the blades corresponding to said tapping threads and bolts fixed into said tapping threads penetrating the holes.
[Claim 4]
The aerogenerator according to claim 2, wherein said connecting arms comprise of horizontal protruding arms from said bearing housing and branch 1 and 2 diverging from the outer edge of said horizontal protruding arms where there is additionally equipped semi-circular part protruding forward from tip of said branch 2 so that the arras are held by said fixing groove; said fixing means have tapping threads made on the outer sides of said branch 1 and 2, and multiple holes which are drilled onto said blades corresponding to said tapping threads, and multiple bolts fixed into said tapping threads penetrating said holes.
[Claim 5]
The aerogenerator according to claim 1, further comprising additional circumferential fixing plates connecting said blades together and having holes in the middle, and equipped in the lower, middle and upper sections of said blades.
[Claim 6]
The aerogenerator according to claim 5, further comprising reinforcement plates in the joint of said circumferential fixing plates and said connecting arms.
[Claim 7]
The aerogenerator according to claim 5, wherein said circumferential fixing plates have groove portions formed to the inner sides of the circumference corresponding to the width of middle part of said blades.
[Claim 8]
The aerogenerator according to claim 5, wherein said circumferential fixing plates are fixed at the upper, middle and lower parts of said vertical axis in order that said vertical axis penetrates the centers of the plates: said fixing plates are evenly separated, fixing the upper, or lower, or middle section of said blades, containing multiple fixing parts including convex round part, multiple concave groove parts which connect each said fixing parts to one another and convex round parts formed on the edge connecting one end of fixing parts with said concave round parts.
[Claim 9]
The aerogenerator according to claim 5, wherein said circumferential fixing plates are designed to wrap said blades with a constant width along the cross- sections of said blades. [Claim 10]
An aerogenerator comprising: a vertical axis mounted on a base on the ground; a plurality of blades supported and connected to said vertical axis by one or more circumferential fixing plates fixed to said vertical axis; an electric power generating device indirectly connected to said blades by some fixing means, and each having a groove portion protruding forward and forming a semi-circle shape at the rear, and made of a curved plate bending toward one direction from one tip of said groove portion, and bending again toward the opposite direction shaping a backward curve; and an electric power generating device directly or indirectly connected to said bearing housing. [Claim 11]
The aerogenerator according to claim 10, wherein said fixed circumferential plates are equipped at the upper, middle, and lower parts of said vertical axis in order that the vertical axis penetrates the centers of the plates, and where the fixed plates are evenly separated, fixing the upper, or lower, or middle section of said blades: the aerogenerator comprises of multiple fixing parts including circular-arc parts and multiple convex round parts; concave round parts facing each other; and convex round parts which connect each of said fixing parts. [Claim 12]
The aerogenerator according to claim 11, further comprising a plurality of holes evenly spaced around the central circumference of said circumferential fixing plates. [Claim 13]
The aerogenerator according to claim 10, wherein said circumferential fixing plates are fixed to the vertical axis and equipped at the upper, middle and lower parts of the vertical axis in the way that the vertical axis 7
passes though the centers of the plates; comprise protruding plates evenly spaced in each circumference, fixed and separating the upper, or middle, or lower section of said blades, having holes in the middle of each circumferential fixing plate, having wider outer sides and narrower inner sides, and having streamlined lateral sides. [Claim 14]
The aerogenerator according to claim 11 or claim 13, further comprising upper and lower reinforcement rings passed through by vertical axis, and reinforcing the center of said circumferential fixing plates. [Claim 15]
An aerogenerator comprising: a vertical axis mounted on a base on the ground; one or more bearing housings each having its center rotatably coupled to said vertical axis, and having a plurality of evenly spaced connecting arms each protruded from the cylindrical surface of said bearing housing; a plurality of blades fixed to said connecting arms with fixing means; and a generator directly or indirectly connected to said bearing housings by some fixing means.
Said blade has streamlined and protruding front sides allowing the rear to have semi-circle-shaped groove portion; made of a curved plate bending toward one direction from one tip of said groove portion, and bending again toward the opposite direction shaping a backward curve. [Claim 16]
The aerogenerator according to claim 15, further comprising circumferential fixing plates connecting the upper, lower and middle sections of said blade together, and having holes in the middle. [Claim 17]
The aerogenerator according to claim 15, wherein said connecting arms are composed of horizontal plates protruding from the bearing housing; said fixing means are composed of tapping threads made on the outer sides of said connecting arms, holes drilled on the blades corresponding to said tapping threads, and bolts fixed into said tapping threads penetrating said holes. [Claim 18]
The aerogenerator according to claim 15, further comprising protrudent semi-circular parts protruding forward from tip of said branch 2 so that the arms are held by said fixing groove; but said connecting arms consist of horizontal protruding arms projected from said bearing housings and branch 1 and 2 protruding the outer edge of said horizontal protruding arms.
Said fixing means have tapping threads made on the outer sides of said branch 1 and 2, and multiple holes which are drilled onto blades which correspond to said tapping threads, and multiple bolts fixed into said tapping thread penetrating said holes. [Claim 19]
An aerogenerator comprising.' a vertical axis mounted on a base on the ground; a plurality of blades connected by connecting arms protruding from the outer circumference of said vertical axis, and rotation by wind power,' and an electric power generating device connected to said bearing house.
Said blade comprises a groove portion protruding forward and forming a semi-circle shape at the rear, and made of a curved plate bending toward one direction from one tip of said groove portion, and bending again toward the opposite direction shaping a backward curve; but the width of the curve gets narrower at both ends of the curved plate, and the combination of said blades is characterized by outer side's elliptic sphere shape and inner sides' sphere shape. [Claim 20]
The aerogenerator according claim 19, further comprising a reinforcement fixing plates added to the connecting part of said blades and connecting arms. [Claim 21]
The aerogenerator according to claim 19, further comprising fixing plates supporting said blades, added between said blade and connecting arm. [Claim 22]
The aerogenerator according to claim 21, further comprising reinforcement fixing plates at the joint of said fixing plates and connecting arms. [Claim 23]
The aerogenerator according to claim 21, wherein on said fixing plate of the blade concave groove portion from the circumference to the inner side is formed corresponding to the width of the middle of said blade. [Claim 24]
The aerogenerator according to claim 21, wherein said fixing plates are fixed at the upper, middle and lower parts of said vertical axis in order that said vertical axis penetrates the centers of the plates: said fixing plates are evenly separated, fixing the upper, or lower, or middle section of said blades, containing multiple fixing parts including convex round part, multiple concave groove parts which connect each said fixing parts to one another and convex round parts formed on the edge connecting one end of fixing parts with said concave round parts. [Claim 25]
The aerogenerator according to claim 21, wherein said fixing plates are designed to wrap said blades with a constant width along the cross- sections of said blades [Claim 26]
An aerogenerator comprising: a vertical axis; a plurality of blades connected and fixed to said vertical axis by fixing means; an electric power generating device connected to the circumference of said vertical axis by one or more fixing plates linked to the vertical axis and producing electromotive force through the rotation of the blades,' and the said blades each having a groove portion protruding forward and forming a semi-circle shape at the rear, and made of a curved plate bending toward one direction from one tip of said groove portion, and bending again toward the opposite direction shaping a backward curve; and symmetrically slant blade having protruding middle part of blades toward one direction. [Claim 27]
The aerogenerator according to claim 26, further comprising a plurality of sub-blades positioned in the inner side at various heights in the outer side of said blades part . [Claim 28]
The aerogenerator according to claim 26, wherein said fixing plates are characterized by: being placed in the upper, and lower parts of the blades whose center is penetrated by said vertical axis comprising a plurality of fixing parts including one side of circular arch part, and the dixinvis evenly spaced around the each blade and fixed as fixing blocks the upper, lower, and middle parts composed of a plurality of blades made of curved plates bending toward one side from one tip of said groove and then bending toward the opposite side comprising a plurality of a concave round part at the one side of said each fixing part, and connecting said each fixing part; and comprising a convex round part formated at the edge of said concave round part and on end at the fixing part . [Claim 29]
The aerogenerator according to claim 26, wherein said fixing means comprises bearing housings around the outer part of said vertical axis, and a plurality of connecting arms linked to said bearing housing at one tip, protruding outward, and linked and fixed to said fixing plate at the other tip. [Claim 30]
The aerogenerator according to claim 26, further comprising a middle fixing part at the middle part of said vertical axis and blades. [Claim 31]
The aerogenerator according to claim 30, wherein said middle fixing part comprises a bearing housing around the outer part of said axis, brackets fixed to each blade, and connecting arms linking said bearing housing and brackets. [Claim 32]
An aerogenerator comprising: a vertical axis mounted on the base on the ground; multiple blades connected to the circumference of said vertical axis by some fixing means, each having a groove portion protruding forward and forming a semi-circle shape at the rear, and made of a curved plate bending toward one direction from one tip of said groove portion, and bending again toward the opposite direction shaping a backward curve; an electric power generating device connected to a bearing housing; and a plurality of blades with multiple holes at one part of groove portion and curved plates, which is one side of said blades. [Claim 33]
An aerogenerator comprising: a vertical axis mounted on the base on the ground; multiple blades connected to the circumference of said vertical axis by some fixing means, each having a groove portion protruding forward and forming a semi-circle shape at the rear, and made of a curved plate bending toward one direction from one tip of said groove portion, and bending again toward the opposite direction shaping a backward curve; an electric power generating device connected to a bearing housing; and a plurality of blades with multiple groove parts at one part of groove portion and curved plates, which is one side of said blades. [Claim 34]
The aerogenerator according to claim 33, wherein said groove part has a curved shape, and the outer side of the groove is wide, and the inner side is narrow. [Claim 35]
An aerogenerator comprising: a vertical axis mounted on the base on the ground; multiple blades connected to the circumference of said vertical axis by some fixing means, each having a groove portion protruding forward and forming a semi-circle shape at the rear, and made of a curved plate bending toward one direction from one tip of said groove portion, and bending again toward the opposite direction shaping a backward curve; an electric power generating device connected to a bearing housing; and a plurality of wrinkled blades with multiple groove parts including holes in the middle of the inner side at one part of groove portion and curved plates, which is one side of said blades. [Claim 36]
The aerogenerator according to claim 35, wherein said blade comprises: an outer plate and an inner plate; and a reinforcement net placed between said outer and inner plates so as to reinforce said blade.
PCT/KR2006/005119 2005-11-30 2006-11-30 Aerogenerator WO2007064155A1 (en)

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KR10-2005-0115246 2005-11-30
KR20050115246 2005-11-30
KR10-2005-0132123 2005-12-28
KR1020050132123A KR20070069702A (en) 2005-12-28 2005-12-28 Aerogenerator
KR1020060004586A KR100616109B1 (en) 2005-11-30 2006-01-16 Aerogenerator
KR10-2006-0004586 2006-01-16
KR10-2006-0029792 2006-03-31
KR1020060029792A KR20070098301A (en) 2006-03-31 2006-03-31 Aerogenerator
KR1020060066041A KR100752755B1 (en) 2006-07-13 2006-07-13 A vertical wings of aerogenerator and theforming method thereof
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