JP2002310057A - Blade of wind mill for wind power generation and unit and apparatus using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blade of a wind mill for wind power generation having superior silence, conversion efficiency in breeze and starting performance, and provide a wind power generation unit and wind power generator having high degree of freedom in installation. SOLUTION: This blade of a wind mill for power generation is formed by two circular-arc bent plates obtained by longitudinally dividing a hollow cylinder along the axis at a designated central angle, and a pair of support plates closing circular-arc both ends of each bent plate and connecting two bent plates symmetrically about the axis. The support plates support both bent plates so that chords of circular arcs of both bent plates are parallel to each other and only in a part of the width of the chord, the insides of both circular arcs are opposite to each other, and support a rotating shaft passing through the axis. The designated central angle is set ranging from 140 to 155 deg..

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blade of a wind turbine for wind power generation, and a unit and an apparatus using the blade.

[0002]

2. Description of the Related Art Wind power generation is implemented as a power generation method using clean energy. Wind power is usually
A power generating element consisting of a blade (windmill) and a generator is installed in a place where relatively strong winds stably blow, such as the coast or hills, and the rotation of the blade is transmitted to an input shaft to rotate the generator. Blades used for wind power generation include propeller type,
The horizontal axis of the wind turbine, such as a multi-wing type, sail wing type, etc., is arranged in parallel to the direction in which the wind blows. And a vertical axis windmill arranged perpendicular to the wind turbine. Further, it can be classified into a windmill such as a propeller type and a Darrieus type having a high peripheral speed ratio (peripheral speed / wind speed), and a windmill having a low peripheral speed ratio such as a Savonius type and a multi-blade type.

[0003]

A horizontal axis wind turbine, particularly a propeller type wind turbine, has an advantage that a high rotation speed can be obtained. On the other hand, a means for adjusting the rotation surface of the wind turbine to the wind direction (for example, mounting a tail blade) is required. become. Furthermore, there is a disadvantage that the startability is low (it does not rotate at a low wind speed). In addition, a wind turbine of a propeller type, a Darrieus type, or the like having a high peripheral speed ratio has a relatively high conversion efficiency, but has a high wind noise, and requires high working accuracy in blade twisting and the like.
On the other hand, windmills with low peripheral speed ratio, such as Savonius type and multi-blade type,
Although the wind noise is relatively low, the peripheral speed ratio is low, so that it is difficult to obtain a usable high conversion efficiency (efficiency of converting wind speed into rotational torque).

[0004] Due to the above-mentioned drawbacks of the windmill, there are various restrictions in implementing wind power generation. For example, even in a place where a required average wind speed can be obtained, wind noise of blades may cause a problem, or installation or maintenance of a windmill may be difficult. Although wind power is attracting attention for its use of clean energy, its spread has not been remarkable.

The present invention has been made in view of the above problems, and provides a blade of a wind turbine for wind power generation which is excellent in quietness, conversion efficiency under a slight wind, and startability, and which is used for installation. It is an object of the present invention to provide a wind power generation unit and a wind power generator having a high degree of freedom.

[0006]

According to the present invention, two hollow curved plates formed by vertically dividing a hollow cylindrical body at a predetermined central angle along its axis, and two curved arc ends of each curved plate are formed. It consists of a pair of support plates which are closed and two curved plates are connected axially symmetrically. The support plates are such that the chords of the arcs of both the curved plates are parallel to each other and a part of the width of the chord is inside the two arcs. Supports both curved plates so as to face each other and supports a rotation axis passing through the axis, and the predetermined central angle is 140 ° to 155 °.
A wind turbine blade for wind power generation is provided.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The blade of the present invention constitutes a power generating element composed of a combination of a small blade capable of outputting a basic unit power generation and a generator, and this power generating element is assembled in an arbitrary number. It is designed to constitute a collective wind power generator. Such a collective wind power generator has the following advantages.

(1) Since the amount of power generation is obtained by multiplying the unit power generation amount by the number of power generation elements, in order to obtain a desired power generation amount, it is only necessary to determine the number of power generation elements and the aggregation form suitable for the installation location. . Thus, the effort and time to design large blades and generators from scratch according to the desired power output are saved. In addition, since the power generation is shared among the power generation elements, even if some of the power generation elements are damaged, the power generation is not immediately disabled, and the power generation amount can be slightly reduced. (2) By using a small blade and a generator, the production and processing of the power generation element are facilitated, which is suitable for mass production. In addition, when the wind turbine is installed, it can be easily brought into the site and assembled on the site. (3) Since the aggregate form of the power generating elements can be freely changed according to the situation of the site where the wind turbine is installed (installable area, existence of surrounding structures, etc.), there are various conventional restrictions when installing the wind turbine. Alleviation of wind turbines will be promoted.

The blade of the present invention has the following advantages. (1) Excellent startability under a slight wind. In other words, it is started at a light wind, for example, at a wind speed of about 0.3 to 1 m / s. (2) When the wind turbine is installed, it can be easily carried into the site or assembled at the site. In other words, the small-sized blade, and the thickness of the blade can be reduced to facilitate manufacture, handling, or transport in consideration of loading on a vehicle or the like.

[0010] The blade of the present invention is further configured under the following conditions. That is, a part of the width of the opposing strings is 18 to 25% of the length of the strings, and the distance between both strings is 5 to 8% of the length of the strings. This has been found experimentally. The size of the blade is 10
Those having a thickness of about 0 to 400 mm and a height of about 150 to 2500 mm are preferable. This is a case where a wind speed of about 3 m / s is set as a setting condition. The rotating diameter of the blade and the number of rotations are in an inverse relationship, and the axial length of the blade is proportional to the torque. Therefore, these sizes may be adjusted according to the average wind speed, the specifications of the generator, and the like.

[0011] The blade of the present invention is preferably made of a lightweight material in order to enhance the starting performance. Therefore, a molded article made of resin or light metal is preferable. Examples of the resin material include polycarbonate, polypropylene, FRP and polyvinyl chloride, and particularly preferred is polycarbonate having excellent weather resistance. As the light metal material, an aluminum plate having a thickness of about 0.2 to 1.2 mm is preferable.

A wind power generator according to the present invention includes a frame for arranging and fixing a plurality of power generating elements in one plane in a vertical and / or horizontal direction.
A wind power generation unit is configured by assembling a plurality of units with a wind power generation unit including a generator connected to one support plate of the blade as a unit. Preferably, the plurality of wind power units comprises at least one large frame, the large frame supporting said wind power units.

A specific form of mounting the blade and the generator on the frame will be described. In this invention, it is preferable that the blade includes a support shaft protruding from the other support plate, and the frame includes a bearing that supports the support shaft. An example of such a bearing includes a hole formed in a frame and a resin bushing fitted in the hole. It is preferable that the support shaft has a threaded portion at the tip thereof which is threaded in the same direction as the rotation direction of the blade when viewed from the generator side, and is fixed to the other support plate by a screw fastening member.

The input shaft of the generator is mounted coaxially with the blade and can be fixed to a support plate or frame of the blade. When fixing the input shaft of the generator to the support plate of the blade, the input shaft of the generator has a threaded portion at its tip which is twisted in the direction opposite to the rotation direction of the blade when viewed from the generator side, It is fixed to the one support plate by a screw fastening member. Such a mounting structure has a small number of parts and a simple structure, and the blade can be rotatably connected to the input shaft of the generator so that the blade does not run out. The generator preferably has a thrust bearing that supports the input shaft in order to rotatably suspend the blades on the input shaft of the generator.

When the input shaft of the generator is fixed to the frame, one end of the input shaft of the generator is fixed to the frame, and the other end has a coil. The coil is a magnet fixed in the generator case. The generator case is housed in the generator case so as to cross the magnetic flux generated by the blade, and the generator case is fixed to at least one support plate of the blade. In such a mounting structure, the support plate of the blade is fixed to the generator case, so that the input shaft of the generator can be easily centered. Therefore, the power generating element can be connected to the frame such that the blade does not run out. Furthermore, if the generator is supported on the frame so that the input shaft of the generator is oriented in the direction of gravity, the input shaft is fixed and the case of the generator rotates with the blade, so that the magnet is rotated and generated in the coil. An outer-rotor type generator that extracts current from the input shaft can be configured. Therefore, the torque loss of the rotor can be suppressed, and the structure for supporting the power generation element with respect to the frame is simplified.

[0016] The frame can support power generating elements having different rotation directions of the blades. This makes it possible to variously control the influence of the wind on the adjacent surrounding blades. The plurality of power generating elements are laterally arranged and fixed to the frame so that the rotation axes of the blades are parallel to each other, and the blades adjacent to each other in the frame are arranged so that their rotational directions are opposite to each other. Since it is fixed, when the wind colliding with each blade further flows backward as airflow, it is possible to prevent interference between the airflows caused by adjacent blades.
Therefore, since the rotation of each blade is not hindered, the power generation efficiency is further increased.

In the present invention, it is preferable that the above-mentioned wind power generator is arranged at the top of a building or near a road. The wind power generator according to the present invention is preferably installed in a place where the wind blows through. When the wind power generator is arranged adjacent to a wind-blocking structure such as a wall surface, the amount of power generation is reduced. In addition, it is possible to utilize the building style that blows through the valley of the building.

According to the present invention, at least one of the power generating elements described above, a support for supporting the power generating elements in a receivable manner, a power storage unit for storing power obtained by the power generating elements, and a power storage unit for storing power. And an electric lamp that is turned on by the supplied electric power. Such a lighting device further includes an optical sensor attached to the support unit, and a lighting control circuit that supplies the electric power stored in the power storage unit to the lamp in accordance with the amount of light detected by the optical sensor. The present invention can be used for various lighting means such as a street light and an interior light, which are automatically turned on and off according to the brightness (darkness) of the surroundings of the device. Further, if a solar cell module is provided, the electric power obtained by the solar cell module can be stored in the power storage unit together with the electric power obtained by the wind power generation element. Further, it can be used as an optical sensor that controls lighting of an electric lamp based on the output voltage of a solar cell module.

The generator used in the present invention will be described. In particular, the following points are required as characteristics of a generator for a windmill. (1) A high output voltage can be obtained at a low rotation speed. (2) The starting torque is small. The fact that a high output voltage can be obtained at a low rotational speed means that power can be generated even with a weak wind. This is determined by the performance of magnets and iron cores constituting the generator and the winding specifications. The small starting torque means that the generator can be started even with a weak wind. From this point, it is preferable to use the AC generator because the DC generator has a relatively large starting torque due to the friction of the commutator. The alternator is also advantageous in that it does not have a commutator and requires little maintenance.

However, also in the AC generator, the armature iron core and the field of the rotor attract each other depending on the rotational position, so that
Since a so-called magnetic torque is generated, it is necessary to reduce this. The generator having the smallest magnetic torque is a coreless generator for a tachometer. However, since the armature coil is not wound around an iron core, almost no output current can be obtained.

Accordingly, the AC generator used in the present invention can efficiently adjust the amount of iron core around which the armature coil is wound, the gap between the armature iron core and the rotor, and minimize the magnetic torque while efficiently controlling the current. It is configured so that output can be obtained. That is, the AC generator has a so-called drooping characteristic in which the output voltage decreases to some extent when the output current increases. This characteristic is effective for balancing the voltages when the outputs of a plurality of AC generators are rectified and connected in parallel. In order to disperse the magnetic torque with respect to the rotation angle, it is preferable that the number of poles of the armature and the rotor is large. Further, it is preferable that the number of phases of the generator is large from the viewpoint of the waveform ratio when rectified to DC, and a three-phase generator is selected rather than a single phase.

Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited by these embodiments. [Embodiment 1] A specific configuration example of a blade of a wind turbine for wind power generation of the present invention, a wind power generation device using the blade, and a wind power generation unit will be described with reference to the drawings. In FIG. 1, a wind power generation unit 100 includes a power generation element 50 (FIG. 5) formed by coupling a blade 10 and a generator 20, and a small frame 30 on which a predetermined number of the power generation elements 50 are mounted. In this example, the power generation unit 100 includes five power generation elements 50.
Are arranged in one horizontal row. Such a power generation unit 10
0 is further fixed to a large frame to which a plurality of small frames 30 can be attached to form a wind turbine as described later.

The details of the blade 10 will be described with reference to FIGS. FIG. 2 is a front view of the blade 10, and FIG. 3 is a sectional view taken along line III-III of FIG. The blade 10 has two curved plates 1 formed by vertically dividing a cylindrical body at a predetermined central angle along the axis thereof, and two curved plates 1 each having a closed circular arc-shaped end.
And a pair of support plates 2 formed by combining two curved plates.
The curved plate 1 is formed by rolling a rectangular aluminum plate having a plate thickness of 0.4 mm into an arc shape along an axis parallel to the long side, and each has an arc of substantially the same shape and size.

The support plate 2 is formed by molding an aluminum plate having a thickness of 1.0 mm such that one of two opposing sides is a straight line parallel to the other and the other is an arc-shaped curve.
The two curved plates 1 are arranged in parallel with each other at the respective arcuate ends 11. The support plate 2 supports the curved plates 1 at axially symmetric positions such that the chords of the arcs of the curved plates 1 are parallel to each other and the insides of the arcs are opposed to each other by a part of the width of the chord. Each support plate 2
Is formed with a shaft hole 12 through which the shaft center passes. In this example, the rotating diameter (width in FIG. 2) of the blade 10 is 2
00 mm and the height of the blade 10 is 300 mm.

The shape of the curved plate 1 and the positional relationship between the two curved plates 1 on the support plate 2 will be described with reference to FIG. As shown in FIG. 4, the central angles θ of the curved plates 1 arranged at the axially symmetric positions are 148 °, respectively, and the strings C connecting the end points of the arcs of both curved plates 1 are parallel to each other. 1 of the length of string C
The two curved plates 1 having a width w of 9% face each other at a part of each string C, and the strings C facing each other have a length of 7.5.
% Distance d.

Next, the small frame 30 and the small frame 3
The attachment of the blade 10 and the generator 20 to the blade 0 will be described with reference to FIGS. As shown in FIG. 1, the small frame 30 is formed of a mounting frame obtained by welding an equilateral L-shaped steel and developing it on one plane. As shown in FIG. 5, the generator 20 is connected to the input shaft 21 via the bracket 32 so that the tip 21 a of the input shaft 21 projects in the direction of gravity and penetrates the hole 31 formed in the cross member 30 a of the small frame 30. It is screwed to the horizontal member 30a. Tip 21a of input shaft 21
3, a threaded portion 2 which is twisted in a direction opposite to the rotation direction of the blade 10 when viewed from the generator 20 side, as indicated by an arrow in FIG.
2 are formed. A screw 23 (screw fastening member) penetrating through the shaft hole 12a of the support plate 2 is screwed into the screw portion 22, and the generator 20 and the blade 10 are connected in the fastening direction of the screw 23.

At the lower part of the blade 10, a support shaft 25 having a screw portion 24 at the base end, which is shown by an arrow in FIG. 3 and is threaded in the same direction as the rotation direction of the blade 10 when viewed from the generator 20 side, is provided. It is attached. By screwing a screw 26 (screw fastening member) passing through the shaft hole 12b of the support plate 2 into the screw portion 24, the support shaft 25 and the blade 10 are connected in the fastening direction of the screw 26. The support shaft 25 has a tip 25a protruding in the direction of gravity and penetrates a hole 33 formed in the cross member 30b. A nylon bushing 35 is fitted into the hole 33. The bushing 35 forms a radial bearing portion of the support shaft 25 protruding downward through the bushing 35.

Next, the generator 20 will be described with reference to FIG. In this example, a three-phase AC generator that can obtain a high output voltage at a low rotation speed and has a small starting torque is used as the generator 20. FIG. 6 shows an electric output circuit of this embodiment.

In FIG. 6, five three-phase AC generators 20
Are rectified by a three-phase full-wave rectifier bridge R, respectively. The DC output voltage of each rectifier bridge R is connected in series via a coupling capacitor C, and is output as an added DC voltage Vo. The bridge R is formed of a diode, and a diode having a small forward voltage drop is used to reduce rectification loss.

In this embodiment, one generator 20 rotates at 300 rpm when the wind speed is 3 m / sec, and the DC output current 0.3
A DC voltage of 6 V with respect to 3 A, that is, a power of 2 W can be obtained. The output current / voltage characteristics after rectification have a drooping characteristic of 18.2 V / A. Therefore, the wind speed is 3 m / sec from the five generators 20 shown in FIG.
, An output of 30 V and 10 W can be obtained.

Further, as shown in FIG. 6, the DC output circuits obtained by rectifying the outputs of the five generators 20 are, for example, 10 units connected in parallel, and a total of 100 W at a wind speed of 3 m / sec.
(For about 50 generators).

Here, even if a slight difference occurs in the output voltage of each generator 20 due to a difference in wind speed or a variation in output characteristics, the output of the generator 20 has an appropriate current-voltage characteristic as described above. Since each DC output circuit has a drooping characteristic, the DC output circuits connected in parallel can adjust the respective output currents to balance the output voltages of the DC output circuits with each other.

The DC power obtained in this manner may be temporarily stored in a battery, for example, and supplied to a load as needed.
It may be converted to 50 / 60Hz AC power and sold to a power company. The number of generators 20 and the number of DC output circuits connected in parallel shown in FIG.
What is necessary is just to determine according to the specification of the target to supply electric power.

FIG. 7 illustrates another embodiment of mounting the blade 10 and the generator 20 to the small frame 30. In the mounting method described with reference to FIG. 5, the generator 20 is mounted on the small frame 30 via the bracket 32, but in this example, the generator 20 having the mounting screw portion 20 a is attached to the small frame 30. It is attached to the small frame 30 by a screw 28 that penetrates the cross member 30a and is screwed to the screw portion 20a. It is preferable to provide a cushion material 38 between the generator 20 and the horizontal member 30a.

As shown in FIG. 8, the power generation unit 100 has a large frame 4 to which a plurality of small frames 30 can be attached.
0 to form the wind power generator 200. Like the small frame 30, the large frame 40 is formed of a mounting frame obtained by welding an equilateral L-shaped steel and developing it on one plane, and the power generation units 100 can be arranged vertically and horizontally. The vertical members 40a of the large frame 40 include the power generation units 10 of each stage.
A bracket 41 for supporting both lower ends of the bracket 0 is provided (only one side is shown). Further, the large frame 40 is supported and fixed by leg members (not shown) and wires extending from the upper portion of the large frame 40 to the installation surface.

In the above-described example, the power generation units 100 in which the power generation elements 50 are arranged in a row are shown. However, the number and arrangement direction of the power generation elements 50 constituting one power generation unit are not limited, and the arrangement is free. Can be set to For example, as shown in FIG. 9, a power generation unit 150 in which the power generation elements 50 are arranged in a vertical line can be configured. These power generation units 1
00 and 150 can be further assembled vertically and horizontally according to the situation of the installation site. For example, as shown in FIGS. 10 and 11, a plurality of power generation units can be attached to one or more large frames 40 and fixed. In FIG. 10, a wind power generator 210 in which ten power generation units 150 are arranged in one row is formed, and in FIG. 11, a wind power generator 220 in which ten power generation units 100 are arranged in one row is formed.

[Embodiment 2] FIG.
Is a front view, and FIG. 13 is a bottom view thereof. In the first embodiment, the input shaft 21 of the generator 20 and the upper support plate 2 of the blade 10 are connected.
This embodiment differs from the first embodiment in that the case of the generator 60 and the lower support plate 2 of the blade 10 are connected. As shown in FIGS. 12 and 13, the power generating element 70
, A support shaft 25 fixed to the upper support plate 2, and a generator 60 attached to the lower support plate 2. The boss 5 and the fastening member 6 that inserts the input shaft 61 inserted in the boss hole into a screw hole formed in a direction orthogonal to the boss hole are connected to the input shaft 61 of the generator 60. . The boss 5 is fixed to, for example, the horizontal member 30a of the small frame 30 shown in FIG. The generator 60 is fixed to the lower support plate 2 via a cylindrical cover 67.

FIG. 14 is a longitudinal sectional view of a main part of FIG. 12, and FIG. 15 is a sectional view taken along line IV-IV of FIG. FIG. 14 and FIG.
As shown in FIG. 5, the generator 60 includes an input shaft 61, a disk 62 mounted at right angles to the input shaft 61 and non-rotatably, and a coil 63 wound concentrically around the outer periphery of the disk 62. And a cylindrical generator case 65 in which magnets 64 are arranged and fixed inside. The magnet 64 is composed of a plurality of flat columnar neodymium magnets, and is arranged and fixed in a ring shape inside each of the upper and lower case plates 65 a and 65 b of the generator case 65. The upper and lower magnets 64 attached to the upper and lower case plates 65a and 65b are coaxially opposed to each other via a gap traversed by the coil 63.

The input shaft 61 is rotatably supported with respect to the generator case 65 by bearings 66 formed of radial ball bearings, which are respectively disposed outside the upper and lower case plates 65a and 65b of the generator case 65. ing. The coil 63 is attached to the disk 62 so as to cross the magnetic flux generated between each pair of magnets 64.
Is rotated relative to the generator case 65, the current generated in the coil 63 is extracted to the outside by a lead wire (not shown) extending from the coil 63. This lead wire is connected to an external circuit unit through a hole 61 a formed along the axis of the input shaft 61.

The cover 67 has a bottom plate 67a having a diameter larger than that of the upper case plate 65a.
It has six through holes 67b. Bottom plate 67a and lower support plate 2
Are joined by the rivets 68 so that the cover 67 is fixed to the blade 10. Further, the bottom plate 67a
Is bonded to the upper case plate 65a. The cover 67 secures a bonding area with the generator case 65 and increases the waterproofness of the generator 60.

FIG. 16 is a front view of a power generating unit 75 in which a plurality of power generating elements 70 are mounted on the small frame 30 (FIGS. 1 and 5). In part A in the figure, FIG.
As shown in FIG. 7, the input shaft 61 of the generator 60 is attached to the boss 5 attached to the lower cross member 30a of the small frame 30.
Is inserted, the lower part of the power generation element 70 is rotatably supported by the small frame 30. In the part B in the figure, as shown in FIG.
The upper portion of the power generating element 70 is rotatably supported by the small frame 30 by inserting the supporting shaft 25 of the blade 10 into the bushing 33 attached to the small frame 30.

FIG. 17 is a plan view of FIG. FIG.
As shown in FIG. 2, the plurality of power generation elements 70 are laterally arranged and fixed to the small frame 30 so that the rotation axes of the blades 10 are parallel to each other, and the blades 10 adjacent to each other in the small frame 30 are: As shown by the upper arrow in the figure, the arrangement is fixed so that the respective rotation directions are opposite to each other. With such an arrangement of the power generating elements 70, when wind blowing from the direction indicated by the arrow on the lower side in the drawing collides with each blade 10 and further flows backward as airflow, the airflow generated by each adjacent blade 10 is controlled. Interference can be prevented.

As described above, the generator case 65 is fixed to the blade 10 to be integrated, and the outer shaft for fixing the input shaft 61 and rotating the magnet 64 is simplified, so that the structure is simplified and Can be suppressed.

As another embodiment of the second embodiment, the portion B in FIG.
The input shaft 61 of the generator 60 is inserted into the boss 5 attached to the horizontal member 30b on the upper side of
Can be supported. In such a configuration, the generators 60 are respectively attached to the support plates 2 at the upper and lower ends of the blade 10, but when the wind speed received by the blade 10 is high, the output of the blade 10 is doubled by the rotation of one blade 10. Can be obtained. When the wind speed received by the blade 10 is low, the output that is insufficient with only one generator 60 can be compensated.

[Embodiment 3] FIG.
FIG. 19 is a front view of a streetlight as a lighting device configured by using FIG. 19, and FIG. 19 is a cross-sectional view taken along line VV of FIG. 18. As shown in FIGS. 18 and 19, the streetlight 8 includes a plurality of power generation elements 70.
A cage 81 covering these power generating elements 70, a column 82 supporting each power generating element 70 so that each blade 10 of each power generating element 70 can receive air, an electric lamp 83 suspended from the column 82, 82 mainly includes a circuit section 9 disposed inside.

As shown in FIG. 19, inside the basket 81, four power generating elements 70 configured to have the same rotation direction are annularly formed at substantially the same height via a cross-shaped bracket 85. It is supported by. The upper part of each power generation element 70
As shown in FIG. 5, the support shaft 25 attached to the upper support plate 2 of the blade 10 is supported by the bushing 35 attached to the bracket 85. As shown in FIG. 16, a generator 60 is attached to the lower support plate 2 of the blade 10, and an input shaft 61 oriented in the direction of gravity is attached to a boss 5 attached to a bracket 85.
Supported by

In this example, the rotating diameter (width in FIG. 2) of each blade 10 of each power generating element 70 is 350 mm, and the height of the blade 10 is 700 mm. In addition, electric light 83
Is constituted by a 15 W round fluorescent lamp, and is turned on by electric power supplied from a storage battery of a circuit section 9 described later.

The upper portion of the bracket 85 has a panel-shaped solar cell module 8 as shown by a broken line in the figure.
6 can be attached. Solar cell module 86
Is added, the power obtained by the solar cell module 86 can be stored in a power storage unit described later together with the power obtained by the power generation element 70, and the electric light 83 based on the output voltage of the solar cell module 86. It can also be used as an optical sensor for controlling lighting of. Moreover, it becomes a covering member which covers the upper part of the power generation element 70 and improves the waterproofness of the power generation element 70.

FIG. 20 is a block diagram showing the configuration of the circuit section 9 of the streetlight 8. As shown in FIG. Note that this circuit section 84 shows a case where the above-described solar cell module 86 is added to the streetlight 8. In FIG. 20, a storage battery (power storage unit) 93 that stores power obtained by the power generating element 70 is connected to the circuit unit 9. The solar cell module 86 generates a DC voltage of about 6 to 9 V by receiving sunlight or the like,
Power of about 1.2 to 1.8 W can be obtained. The AC output voltages of the four power generating elements 70 are full-wave rectified by a Schottky barrier diode having a threshold voltage of 0.38 V in a three-phase AC rectifier circuit 90. The light / dark signal generation circuit 91 detects sunset by a change in the output voltage of the solar cell module 86, and sends the result to the one-chip microcomputer 92 as a light / dark signal. Note that, instead of the solar cell module 86, a photoelectric conversion element such as Cds can be used as an optical sensor for detecting sunset.

The one-chip microcomputer 92 constantly monitors the storage battery 93 and controls lighting of the electric lamp 83 based on a preset program. The AD converter 94 digitizes the output voltage of the constant-voltage power supply 95 and the terminal voltage of the storage battery 93 and inputs them to the one-chip microcomputer 92 at all times. The FET first switch 96 monitors the overcharge of the storage battery 93 with a constant voltage of the charging voltage of the storage battery 93 and a control signal from the one-chip microcomputer 92, and performs PWM control of the charging current. The FET second switch 97 is connected to the light 8
The lighting control of No. 3 and the limitation of the output to prevent overdischarge of the storage battery 93 are performed.

When the one-chip microcomputer 92 receives the light / dark signal from the light / dark signal generation circuit 91, the lighting timer of the one-chip microcomputer 92 starts counting time. When the time counted by the lighting timer exceeds the preset lighting time, the power supply from the storage battery 93 via the FET second switch 97 is stopped. At the same time, the reset signal generation circuit 98 resets the light / dark signal and the lighting timer in the one-chip microcomputer 92. The control operation by the one-chip microcomputer 92 is performed by the LE connected to the circuit unit 9.
It can be confirmed by the D monitor 99.

In the street lamp 8 having the above-described circuit section 9, when the blade 10 of the power generating element 70 rotates at 180 rpm by receiving a wind having a wind speed of 4 to 5 m / sec, a DC output current of 0.2 A and 24.degree. A DC voltage of 1 V, that is, an electric power of about 5 W is obtained. In the above embodiment, the turning off of the electric lamp 83 is determined by the lighting timer. However, the sunrise is detected by a change in the output voltage of the solar cell module 86, and the result is sent to the one-chip microcomputer 92 as a light / dark signal to turn off the light. Is performed.

The streetlight 8 of the third embodiment is 3 m /
A sufficient amount of light can be provided by using the power generating element 70 that can generate power at a relatively low wind speed of about seconds. Streetlight 8
Power is not required, so that the cost required for installing a streetlight can be significantly reduced.

[0054]

According to the present invention, there is provided a blade for a wind turbine for wind power generation, which is excellent in quietness, conversion efficiency under a slight wind, and startability. Further, a wind power generation unit and a wind power generation device having a high degree of freedom in installation are provided. The unit and the device using the blade of the present invention can be designed to obtain a desired power generation amount only by determining an aggregation form suitable for the number of power generating elements and an installation place. Thus, the effort and time to design large blades and generators from scratch according to the desired power output are saved. In addition, since the power generation is shared among the power generation elements, even if some of the power generation elements are damaged, power generation is not immediately disabled.

Further, the use of a small blade and a generator facilitates the manufacture and processing of members and is suitable for mass production. In addition, when the wind turbine is installed, it can be easily brought into the site and assembled on the site. Furthermore, since the configuration of the power generating elements can be freely changed according to the situation of the site where the wind turbine is installed (installable area, existence of surrounding structures, etc.),
Various conventional restrictions when installing a windmill are relaxed, and the spread of the windmill is promoted.

By using the power generating element for the lighting device,
Generate electricity at a relatively low wind speed of about 3 m / s in the city,
A sufficient amount of light can be provided as needed. In such a lighting device, since power transmission to the lighting device is not required, the cost required for installation can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a front view of a wind power generation unit according to the present invention.

FIG. 2 is a front view of a blade constituting the unit of FIG. 1;

FIG. 3 is a sectional view taken along line III-III of the blade of FIG. 2;

FIG. 4 is a diagram illustrating the relationship between the arrangement positions of blades.

FIG. 5 is a front view illustrating attachment of a blade and a generator to a frame.

FIG. 6 shows an electrical output circuit in the unit of FIG.

FIG. 7 is a front view illustrating a method of attaching a blade and a generator to a frame according to still another embodiment of the present invention.

FIG. 8 is a front view of a wind turbine generator formed by assembling the units of FIG.

FIG. 9 is a front view of a wind power generation unit according to another embodiment of the present invention.

FIG. 10 is a front view of a wind turbine generator according to another embodiment in which the wind turbine units of the present invention are assembled.

FIG. 11 is a front view of a wind turbine generator according to another embodiment in which the wind turbine generator units of the present invention are assembled.

FIG. 12 is a front view of a power generating element according to another embodiment.

FIG. 13 is a bottom view of the power generating element of FIG.

FIG. 14 is a front sectional view of the generator 60 of FIG.

FIG. 15 is a cross-sectional view of the generator 60 of FIG. 14 taken along line IV-IV.

FIG. 16 is a front view of a power generation unit according to another embodiment.

FIG. 17 is a plan view of the power generation unit of FIG.

18 is a front view of a streetlight as a lighting device configured by using the power generating element 70 of FIG.

FIG. 19 is a sectional view taken along line VV of the streetlight of FIG. 18;

20 is a block diagram illustrating a configuration of a circuit section of the streetlight in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Curved plate 2 Support plate 8 Street lamp 10 Blade 11 Arc-shaped end 20 Generator 30 Small frame 40 Large frame 50 Power generation element 60 Generator 61 Input shaft 63 Coil 64 Magnet 65 Generator case 70 Power generation element 100 Power generation unit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H02K 7/18 H02P 9/00 F H02P 9/00 H05B 37/02 D H05B 37/02 F21S 9/02 Q F-term (reference) 3H078 AA07 AA11 AA26 AA31 AA34 BB11 BB20 BB21 CC02 CC12 CC22 CC32 CC46 3K073 AA39 AA83 AB07 BA28 CD04 CF13 CG06 CG13 CG15 CJ19 CJ22 CL07 5H590 AA01 AA04 CA14 CE21 CE01 CC01 CE01 CC01 CE HA11 HB14 5H607 AA12 AA14 BB02 BB07 BB14 BB26 CC05 DD03 DD08 FF26

Claims (22)

[Claims] 1. Two hollow curved plates formed by vertically dividing a hollow cylindrical body at a predetermined central angle along its axis, and the two curved plates are closed at both ends and the two curved plates are symmetrical about the axis. And a pair of support plates, which are connected to each other.The support plates are arranged such that the chords of the arcs of the two curved plates are parallel to each other, and the insides of the two arcs are opposed to each other by a part of the width of the chord. A blade for a wind turbine for wind power generation, wherein the blade supports the rotating shaft passing through the shaft and the predetermined central angle is 140 ° to 155 °. 2. A part of the width of the opposite string is one of the length of the string.
The blade according to claim 1, which is 8 to 25%. 3. The blade according to claim 1, wherein the distance between the two strings is 5 to 8% of the length of the strings. 4. The blade according to claim 1, having a rotating diameter of 100 to 400 mm and a height of 150 to 2500 mm. 5. A power generating element comprising: the blade according to claim 1; and a power generator connected to at least one of the support plates. 6. A power generating element according to claim 5, comprising a frame for fixing at least one of the power generating elements in a plane in a vertical and / or horizontal direction, wherein an input shaft of the generator is a blade. A wind power generation unit, which is installed coaxially with the rotation axis of (1) and is fixed to the support plate or the frame. 7. A plurality of power generating elements are arranged and fixed to a frame in a lateral direction such that rotation axes of the blades are parallel to each other, and blades adjacent to each other in the frame have rotation directions opposite to each other. The wind power generation unit according to claim 6, wherein the wind power generation unit is arranged and fixed such that 8. The wind power generation unit according to claim 6, wherein each blade has a support shaft projecting from one of the support plates, and the frame includes a respective bearing for supporting the support shaft. 9. An input shaft of the generator has a threaded portion at the tip thereof which is twisted in a direction opposite to a rotation direction of the blade when viewed from the generator side, and the one support plate is provided via a screw fastening member. The wind power generation unit according to claim 6, which is fixed to the wind power generation unit. 10. An input shaft of the generator has one end fixed to a frame and the other end having a coil, wherein the coil crosses a magnetic flux generated by a magnet fixed in a generator case. The wind power generation unit according to claim 6, wherein the wind power generation unit is housed in a machine case, and the generator case is fixed to at least one support plate of the blade. 11. The wind power generation unit according to claim 9, wherein the power generation element is supported by a frame such that an input shaft of the power generator faces a direction of gravity. 12. The wind power generation unit according to claim 8, wherein the bearing comprises a hole formed in the frame and a bushing fitted in the hole. 13. The support shaft has a threaded portion at its tip which is threaded in the same direction as the blade rotation direction as viewed from the generator side, and is fixed to the support plate via a screw fastening member. A wind power generation unit according to claim 8. 14. The wind power generation unit according to claim 6, wherein each generator is a three-phase AC generator. 15. The wind power generation unit according to claim 14, further comprising a rectifier for rectifying the output of each generator. 16. The wind power generation unit according to claim 14, wherein outputs of the plurality of AC generators are rectified and connected in series. 17. A wind power generation unit according to claim 6, wherein a plurality of wind power generation units are arranged in at least one plane in a vertical and / or horizontal direction, each of the wind power generation units. Wind power generator. 18. The plurality of wind power generation units comprises at least one large frame, wherein the large frame is provided.
A wind turbine generator supporting the wind turbine unit according to any one of claims 6 to 10. 19. The wind turbine generator according to claim 17, which is arranged at the top of a building or near a road. 20. At least one of the power generating elements according to claim 5, a support for supporting the power generating elements in a receivable manner, a power storage unit for storing power obtained by the power generating elements, and a power storage unit. An illumination device comprising an electric lamp that is lit by stored electric power. 21. The light-emitting device according to claim 20, further comprising: an optical sensor attached to the support, and a lighting control circuit for supplying electric power stored in the power storage unit to the electric lamp according to the amount of light detected by the optical sensor. Lighting equipment. 22. The lighting device according to claim 20, further comprising a solar cell module.