JP2003184729A - Windmill for power source and wind power generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a windmill for a power source and a wind power generator of which the size, shape and number of wind receiving blades, other mechanism and structure can be changed after installing a generator to suit to geographical conditions and which has excellent performances such as light weight, high rigidity, easiness to carry, low cost, wide selection range of installation place. <P>SOLUTION: This windmill for a power source 1 has a plurality of support arms 6 installed on a main shaft 1 toward a radial direction, an annular support body 8 installed to connect the tip of each support arm 6, and a plurality of wind receiving blades 9 detachably installed on a circumference of the annular support body 8 at fixed intervals. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power wind turbine and a wind power generator that can be used for power generation or other purposes, and in particular, a high rotational torque can be obtained even by a slight breeze, and the wind conditions on the land to be installed can be improved. , A power wind turbine which can be appropriately adapted, and a wind power generator using the same.

[0002]

2. Description of the Related Art Conventionally, there are hydroelectric power generation, thermal power generation, and nuclear power generation as power generation methods in Japan, but these have problems such as natural destruction by a dam, fuel and smoke pollution, and radioactivity. Attention is paid to the solar power generation and the wind power generation supported by the national government. The current power generation capacity of one wind power generator installed in Japan is 300w to 800w, and the annual power generation amount of the whole country is about 100,000kw.
Here, according to the national policy, by 2010, 3 million k
The goal is to achieve w.

[0003]

However, the following problems have been pointed out in wind power generation. That is,
Wind power generation is not a business unless it has an average wind speed of 4 meters per minute. Since the vertical axis wind turbine is inefficient, the horizontal axis wind turbine is the mainstream. It is necessary to increase the length of the blades and at the same time elevate the tower by using centrifugal force and because the wind speed is higher above the ground.

This causes problems of rigidity of the blade and transportation and installation cost. That is, if the rigidity of the blade is increased, the weight becomes heavier. Naturally, the rotation efficiency due to low-speed wind is poor. For example, in a large generator with a blade length of 45 to 50 m and a tower height of 40 to 50 m, it is difficult to carry more than 16 m with a trailer, so it is difficult to carry, for example, importing and carrying 600 w class items from the United States. However, there is a drawback that the fare alone costs more than 20 million yen.

Further, the annual average wind speed in the long and narrow Japanese archipelago is also completely different depending on the geographical conditions. Therefore, even after investigating the wind power at the installation site in advance and designing it, the land of Japan is long and rich in changes,
The applied basic data is difficult to fit the geography, and there is a problem that the installed wind power generator does not operate at all (because a large machine requires a wind speed of 7 m / min).

Moreover, once the wind power generator is installed, the structure cannot be changed, and the installation itself is wasteful. Further, in the horizontal axis type, three blades are the mainstream (if there are many, rigidity and rotation rate are problems), so when using a high position airflow, when one blade is facing upward, the other two blades are diagonal. Since it faces downward, there is a drawback in that the effective area of the blade that receives effective wind pressure is limited.

The present invention has been made in view of the above circumstances.
(1) It is possible to increase power generation efficiency with a small generator.
(2) In the structure suitable for the average wind speed in the installation geography,
Can be set or changed on-site, (3) Wind turbine configuration can be changed after installation, (4)
It is intended to provide a power wind turbine having excellent performance such as lightweight and high rigidity, easy transportation, (5) low cost, and a wide selection of installation locations, and a wind power generator using the same. .

[0008]

The present invention takes the following technical means in order to solve the above problems. The basic technical theory for solving the above problems is as follows.

In wind power generation, the main shaft of the generator is rotated by the rotational force of the wind turbine, so the higher the rotational speed of the wind turbine, the higher the power generation efficiency. Further, when the blades that receive wind pressure have a large effective area and are located farther from the main shaft, a small wind force enables powerful rotation due to the principle of leverage. In order to widen the effective area of the blades, in addition to widening the area of the individual, it is satisfactory that there are many blades on the same rotation orbit, and continuous wind pressure can be received.

From this, a plurality of support arms are arranged in the radial direction on the main shaft. An annular support was attached so as to connect the tip ends of the support arms. On the circumferential surface of the annular support, a plurality of wind receiving blades, which are equal to or more than the number of support arms, were attached at regular intervals. Further, there is an advantage that the vertical axis can be effectively used. That is, the blade length of the conventional 3-blade horizontal axis wind turbine is
For example, assuming that the length is 2 m, if the length of the support arm in the present application is set to 2 m, a plurality of wind receiving blades are arranged at a position 2 m away from the main shaft.

The area of the wind receiving blade at a position 2 m away from the main shaft in the present application is 2 m from the main shaft of the conventional three blades.
Compared with the area that receives the wind pressure at the position of, it becomes a large area that is not comparable. In the present application, this is because the area of the wind receiving blade that receives wind pressure even in a slight wind is large,
The windmill will rotate effectively. That is, since rotation can be obtained even in a slight breeze, high-speed rotation can be easily obtained in normal wind.

For example, in the case of three blades on the horizontal axis, the next blade must rotate 120 degrees in order to receive the wind pressure at a specific position, but a plurality of wind receiving blades can be mounted on the peripheral surface of the annular support. In the present application, for example, if 10 blades are used,
With the rotation of 36 degrees, the next wind receiving blade can receive effective wind pressure. In other words, at a specific position of the wind receiving blades, continuous wind pressures can be received in a short time, so that the rotating force of the wind turbine becomes stronger on average, and the centrifugal end of the wind turbine is heavy. Can be used effectively.

When the wind turbine is set on the vertical axis, even if the wind receiving blades are made large or the number of attached blades is increased, it is difficult for the rigidity to be increased and stable rotation can be obtained. Moreover, when the wind receiving blade is set at a high position, the area of one wind receiving blade that receives the wind pressure can be significantly expanded as compared with the horizontal axis type.

Since the wind receiving blades can be removably attached to the annular support, the width, length, size, number, etc. of the wind receiving blades after basic installation at the installation location It can be configured optimally for geographical conditions. It can be changed depending on the season. Even if the basic mechanism is the same, since the length of the support arm can be changed on site, standard production is possible, and the length can be arbitrarily selected depending on the location.

Even if the support arm is short, the rotational force can be increased by increasing the number of wind receiving blades.
Also, when the length of the support arm is long, efficient rotation can be easily performed with a small wind receiving blade, so that it is easy to adapt to geographical conditions.

In this way, by installing a standard one at the installation site and collecting data during the test period so that it is optimal for the geographical conditions, it is possible to easily change the setting of the support arm and the wind receiving blade. Therefore, wasteful installation can be eliminated and efficient power generation suitable for the geography can be achieved. The specific contents of the present invention are as follows.

(1) A plurality of support arms are attached to the main shaft in the radial direction, and an annular support is attached so as to connect the tip portions of the respective support arms, and the annular support is attached to the peripheral portion of the annular support. A power wind turbine with a plurality of wind receiving blades that are detachably attached at regular intervals.

(2) The power wind turbine according to (1), wherein the support arm is detachably mounted on a rotary support mounted on a main shaft.

(3) The annular support is divided into a plurality of pieces in the radial direction along the circumference, and is configured to be assembled (1)
A power wind turbine described in any one of (2).

(4) The power wind turbine according to any one of (1) to (3), wherein an auxiliary support arm is attached to the support arm.

(5) The power wind turbine according to any one of (1) to (4), wherein a plurality of wind receiving blades are arranged along the length of the support arm.

(6) In the lower part of the plurality of support arms,
An annular rack is installed in a concentric arrangement with the spindle.
The power wind turbine according to any one of (1) to (5).

(7) In the lower part of the plurality of support arms,
The power wind turbine according to any one of (1) to (5), in which a sliding support member that supports the tip of the long support arm from below is provided.

(8) A plurality of support arms are attached to the main shaft protruding from the bearing at regular intervals in the radial direction, and an annular support is detachably attached so as to connect the tips of the support arms, A plurality of wind receiving blades are removably attached to the peripheral portion of the annular support, and a support arm is provided according to geographical conditions.
A wind power generator configured so that it can be mounted by changing the standard and number of annular support members and wind receiving blades.

(9) A magnet is arranged below the support arm, and faces the magnet below the magnet at a predetermined interval.
The wind power generator according to (8), wherein a magnet that repels the magnet is disposed in an annular shape around the main axis, and the repulsion of the upper and lower magnets prevents the tip of the long support arm from falling.

(10) In a structure in which a plurality of support arms are arranged at regular intervals in the radial direction on the main shaft protruding from the bearing, and wind-receiving blades are attached to the tip end portions of each support arm, An annular rack is attached to the lower part in a concentric arrangement with the main shaft, and a plurality of generators are disposed below the annular rack so as to rotate and generate electric power as the annular rack rotates. Generator.

(11) The wind generator according to any one of (8) to (10), wherein the lower part is integrally formed with the building.

(12) An advertising display is mounted on the surface
The wind power generator according to any one of (8) to (10).

[0029]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a power wind turbine, FIG. 2 is a plan view, and FIG. 3 is a front view showing a wind power generator. The reference numerals in the figure indicate the power wind turbine (1), the main shaft (2), the bearing (3),
Bearing (4), rotary support (5), support arm (6), fixing bolt (7), annular support (8), wind vane (9), power generation part (1
0), generator (11), speed change (speed up) mechanism (12), tower (1
3) and the coated body (14).

A bearing (4) is annularly interposed between the rotary support (5) and the bearing (2) on the lower surface. As a result, the load on the support arm (6) and the wind receiving blade (9) is dispersed to reduce the rotational load. Therefore, the bearing
(4) The larger the radius of the receiving part is, the more stable the load is and the more the load is distributed. Instead of the bearing (4), a plurality of pairs of magnets may be arranged above and below which repel each other.

As shown in FIG. 2, a plurality of support arms (6) are arranged on the upper part of the rotary support (5) at equal intervals in the radial direction of the main shaft, and fixed by bolts (7). ,
It is detachably attached.

Although the shape of the support arm (6) is arbitrary, it is preferably a wing shape of an airplane, and the support arm (6) is arranged with its thick side facing in the rotational direction. In the hollow body of the FRP (fiber reinforced resin) molded body, if necessary, ribs of hard foamed resin, honeycomb ribs or the like can be partially used, so that the weight can be reduced as a whole. The number of supporting arms (6) used is four in the figure, but five, six, or more can be used for the weight, length, rigidity, etc. of the wind receiving blade (9) and the supporting arm (6) itself. Increase or decrease according to.

When increasing the length of the support arm (6),
The rigidity can be maintained by increasing the width and thickness of the base portion. That is, in order to rotate the spindle (2) on the principle of leverage, it is preferable that the length of the support arm (6) is long, and the position where wind can be effectively used for the rotational force is from the spindle (2). Since it is located far from the main shaft (2), it is integrated with the shaft even if there is width or thickness near the main shaft (2), so there is little loss of wind power.

The annular support (8) has a substantially U-shaped cross section,
As shown in FIG. 2, it is formed into an annular shape, but a large diameter object is assembled by dividing it into a plurality of pieces in the radial direction along the peripheral portion. As for the material, FRP (fiber reinforced resin) is lighter than metal and has excellent corrosion resistance. Metal nuts are placed on the peripheral surface at regular intervals.
By embedding (8a), the position can be changed by increasing or decreasing the wind receiving blades (9). The cross-sectional shape of the annular support (8) may be substantially L-shaped.

The material of the wind receiving blade (9) is, for example, FRP.
It is preferably a molded hollow body, and the cross section thereof is preferably an airplane wing shape, but may be a plate shape. Hard foamed resin molded body ribs, honeycomb molded body ribs, and the like can be provided inside. Further, a metal nut (6a) for fixing the annular support (8) is embedded in the tip surface.

As the tower (13), a tubular FRP molded body is easy to handle. By forming the flanges (13a) at the upper and lower ends, it is possible to increase the length by stacking a plurality of short ones. Also, in the case of increasing the height, in the case of a large diameter, the pipe can be made into a vertical split shape, and can be made into 20%, 30%, 40%, etc., and the side end portions are The connection may be made by a side flange (not shown). By using the flange, a ladder or landing (not shown) can be fixed, or a decorative outer plate, an advertisement display, or the like can be attached. The side flanges increase load bearing strength.

In this embodiment constructed as described above, as illustrated in FIG. 3, a concrete foundation is constructed at the installation site, and the tower (13) is laminated at a desired height. The power generation part (10) and the bearing (3) are arranged on it. The configuration up to this point can be standardized to a fixed one. Particularly, the bearing (3) is set so as to be able to cope with a certain amount of power generation range, and the generator (11) and the speed change mechanism (12) can be replaced.

Next, in order to cope with the geographical difference of the wind force due to the change of the installation place, the basic setting of the support arm (6), the annular support (8) and the wind receiving blade (9) is made. This completes the wind power generator (15). This is used to obtain test data on power generation, and if necessary, the length of the supporting arms (6), the number of the supporting arms (6), the combination of the annular supporting bodies (8) corresponding to the supporting arms (6), and the wind receiving blade ( 9) Select the size, number, shape, etc. of
The overall configuration can be modified to suit the geographical conditions.

That is, once the conventional wind power generator is installed, it cannot be replaced even if it is found that it is not suitable for the geographical condition, and it is sometimes left to be left with poor power generation efficiency. , In the present invention, the support arm
(6), annular support (8), wind vane (9) are standardized,
Lightweight and prefabricated, it can be easily replaced, scaled up and down to suit its geographic requirements. Furthermore, even if the wind receiving blade (9) is damaged due to an accident caused by a typhoon or other natural disaster, it can be easily replaced.

FIG. 4 shows a second embodiment, a power wind turbine (1).
FIG. This form example shows a support arm.
The case where (6) is lengthened is shown, and the same members as those in the previous example are designated by the same reference numerals and the description thereof will be omitted.

In this embodiment, as shown in the rotary support (5), the mounting portion is formed in two steps. An auxiliary support arm (66) is detachably fixed to the upper attachment portion (5a). The auxiliary support arm (66) is used to maintain the horizontal position when the support arm (6) is long and corresponds to each support arm (6). The size and shape of the auxiliary support arm (66) are changed according to the length and load of the support arm (6). If the cross-sectional shape is a wing shape of an airplane, buoyancy can be generated with rotation, but a pipe shape or the like may be used.

FIG. 4 shows the support arm (6) for 15 meters,
The one set to be long is shown. Also, the power generation unit (10)
Is installed directly on the roof of a tall building (18) without using the tower (13). When installing on the roof of a high-rise building,
A strong airflow can be utilized only by forming a flat surface portion so as to cover the top of the water supply tank.

Reference numerals (16) and (17) in FIG. 4 denote a pair of magnets (including an electromagnet and a linear motor) that repel each other. That is, the tips of the long support arms (6) can be floated by the repulsion of the upper and lower magnets. In addition, the stator (16) of the linear motor on the side of the building (18), the support arm
By arranging the armature (17) on the (6) side, even if the auxiliary support arm (66) is not provided, a long support arm is provided.
The tip of (6) can be floated to rotate the windmill.

In FIG. 4, reference numeral (16) may be an annular rail, and reference numeral (17) may be a caster (wheel). That is, the support arm (6) can slide on the rail via the casters (wheels). A bearing may be used as a substitute for these. These sliding support members are appropriately selected depending on the installation conditions of the generator.

As shown in FIG. 4, the support arm (6) has 15
For long objects such as m and 20 m, even if the size of the wind receiving blade (9) is small, the wind turbine can be easily rotated by a slight wind. In particular, when the length of the support arm (6) becomes long, the peripheral length of the annular support (8) also becomes long, and a large number of wind receiving blades (9) can be attached.

FIG. 5 shows a third embodiment, a power wind turbine (1).
FIG. The same members as those in the previous example are designated by the same reference numerals and the description thereof will be omitted. In this embodiment, as shown in FIG. 5, an auxiliary wind receiving blade (99) is arranged between the tip end and the base end of the support arm (6). A plurality of the auxiliary wind receiving blades (99) may be provided. Further, the size, shape, mounting direction, etc. can be changed.

This is a narrow geography, a place with strong winds between
It effectively uses the draft. That is, it is difficult to use a long blade or a wide blade in a narrow place. Therefore, the auxiliary wind receiving blades (99) are additionally provided to increase the area receiving the wind pressure. In this case, as shown, an auxiliary support arm (66) can be used if necessary. For mounting the auxiliary wind receiving blade (99), for example, an annular support having a substantially L-shaped cross section can be used for the support arm (6).

FIG. 6 is a front view of the main parts of a power wind turbine showing a fourth embodiment. The same members as those in the previous example are designated by the same reference numerals and the description thereof will be omitted. In this embodiment, as shown in the figure, the rotary support (5) is omitted, and a plurality of support arms are directly attached to the main shaft (2).
I put on (6). In addition, the rotary support (5) is attached to the tip of the spindle (2).
Was fixed and an auxiliary support arm (66) was attached. It is used in small generators (15) for home use. The spindle
When the diameter of (2) is increased, it can be formed into a hollow tube.

FIG. 7 is a front view of essential parts of a power wind turbine showing a fifth embodiment. The same members as those in the previous example are designated by the same reference numerals and the description thereof will be omitted. In this embodiment, a plurality of support arms (6) are arranged on the main shaft (2) in the radial direction. As shown in the drawing, an annular rack (19) is annularly attached to the lower parts of the plurality of support arms (6) in a concentric arrangement with the spindle (2) with the tooth tips thereof facing downward.

A plurality of small generators (11) are arranged in an annular arrangement at several positions below the annular rack (19). In the figure, the transmission (12) is for increasing the speed, and a clutch (not shown) can be interposed.

That is, a large generator is expensive,
The labor for installation is also large. Small generators are relatively inexpensive and easy to transport. In addition, the small generator
The force required for rotation is also small. Furthermore, since the pinion (12) is rotated by the annular rack (19) with a large turning radius,
The generator (11) can be rotated with a small force, and a large power generation can be obtained by disposing a plurality of generators (11). Moreover, even if one of the generators fails, only the failed generator can be replaced without stopping the rotation of the wind turbine.

FIG. 8 shows a wind generator whose lower part is integrated with the building (18). Wind generators (15) for roofs of buildings (18)
Designed as the base of, the construction of the building (18) and the installation of the power wind turbine (1). By this, the building
The power source of (18) can also be covered by this wind power generator. In the building area, there is no problem with the installation location of the wind power generator (15), and the extra power can be sold.

Further, in a small house or the like, the building can be constructed by setting the tower (13) as shown in FIG. 3 like a great country pillar. Electric charge for ordinary house is 3
Since it is 0 to 50 amps, it is possible to facilitate power generation corresponding to that.

FIG. 9 shows a wind power generator set as an advertising tower.
It shows (15). In this embodiment, the advertisement display body (20) is attached to the wind power generator (15). The advertisement display body (20) has a plane annular shape and is arranged below the power generation section (10) in FIG. The advertisement display body (20) has, for example, a rotating means (not shown) and can be rotated by utilizing the rotational force of the main shaft of the wind turbine (1). When you have a neon sign, you can supply power by self-generated electricity. In addition, the electronic display board (2
1) can be provided.

In the present invention, the main shaft (2) can be set horizontally. Even in the case of the horizontal axis, unlike the conventional propeller type, it is possible to efficiently rotate even the wind flow from the side. It is possible to cope with a change in the wind direction by inclining the wind receiving blade (9) slightly obliquely without making it parallel to the main axis (2).

This invention is
The embodiment is not limited to the above-described example, and the design can be appropriately changed according to the purpose. The shape of the wind receiving blade (9) can be changed to a vertically long shape, a triangular shape, a fan shape, or any other suitable shape. The power wind turbine can be used not only for power generation but also for pumping power, milling power, and other power. Further, a solar power generation panel (not shown) can be mounted on the surface of the covering body (14), the tower (13) and the like in FIG.

[0057]

Advantageous Effects of Invention (1) According to the invention described in claim 1, an annular support is mounted on the main shaft so as to connect the respective tip portions of the plurality of support arms mounted in the radial direction. Therefore, even if the number of support arms is small, a plurality of wind receiving blades are detachably attached to the annular support at regular intervals, and the wind receiving blades have a length and width suitable for geographical conditions,
The effect is that the shape can be selectively changed on site. Since the supporting arm, the wind receiving blade, the tower, etc. can be standardized and produced and can be detachably assembled, the transportation cost can be reduced and the workability is excellent. Therefore, the installation range can be widened.

(2) In the invention described in claim 2, since the support arm can be removably attached to the rotary support, the size of the support arm can be set so as to meet the geographical condition of the site.
The effect is that the shape and quantity can be changed.

(3) In the invention described in claim 3, since the annular support is divided into a plurality of parts in the radial direction along the set circumference and is constructed so that it can be assembled, even if it has a large diameter. It is easy to transport and has the effect that it can be easily assembled on site.

(4) In the invention described in claim 4, since the auxiliary supporting arm is attached to the supporting arm, when the supporting arm becomes long and requires reinforcement in terms of rigidity, the auxiliary supporting arm is used. It has the effect of reinforcing rigidity.

(5) In the invention described in claim 5, since a plurality of wind receiving blades can be arranged along the longitudinal direction of the support arm, only a short support arm can be used under geographical conditions. However, there is an effect that the wind receiving area can be increased.

(6) According to the invention described in claim 6, since the annular rack is disposed under the plurality of support arms, the plurality of generators are disposed below the annular rack via the pinion. There is an effect that it can generate electricity.

(7) According to a seventh aspect of the present invention, the sliding support of casters, wheels, magnets, bearings, etc. is provided at the bottom of the plurality of support arms to prevent the distal end of the long support arms from being lowered due to the weight. Since the members are provided, there is an effect that the length of the support arm can be increased and the power generation efficiency can be improved.

(8) According to the invention described in claim 8, the rotary support fixed to the main shaft of the wind power generator is configured to be rotatable together with the shaft, and a plurality of support arms can be detachably attached to the rotary support. And a plurality of wind receiving blades are detachably attached to the annular support so as to connect the distal ends of the respective support arms. According to the geographical conditions, the specifications and the number of the support arms, the annular support bodies, and the wind receiving blades can be changed or replaced at the site to effectively generate electricity.

(9) According to a ninth aspect of the invention, a magnet is attached to a lower portion of the support arm, and the magnet repulsive to the magnet faces the main shaft so as to face the magnet below the magnet at a predetermined interval. It is annularly arranged as the center, and the repulsion of the upper and lower magnets prevents the tip of the long support arm from falling, so that the support arm can be lengthened, and as a result, the rotating force can be increased even by a breeze. There is an effect that can be done. Especially, it is effective in that it can be installed on a high-rise building to obtain high-speed rotation.

(10) In the invention described in claim 10, since the annular rack is attached to the lower part of the plurality of support arms and the plurality of generators are arranged below the annular rack, the rotation of the support arms is accompanied. The annular rack rotates to rotate multiple generators. Therefore, a commercially available inexpensive small generator can be used in place of the specially ordered large generator, which has excellent workability and is advantageous in terms of cost, as well as stopping the wind turbine in case of failure. Instead, there is an effect that only the failed generator can be replaced.

(11) Since the invention described in claim 11 is integrated with the building, the generator can be installed at the same time as the construction, the installation site can be easily selected, and it is necessary for the building. There is an effect that various electric powers can be easily supplied.

(12) According to the twelfth aspect of the invention, since the advertising body is arranged on the tower or other surface of the generator, the advertising power can be easily supplied.

[Brief description of drawings]

FIG. 1 is a front view of a power wind turbine.

FIG. 2 is a plan view of a power wind turbine.

FIG. 3 is a front view of a wind power generator.

FIG. 4 is a plan view of an essential part of a power wind turbine showing a second embodiment.

FIG. 5 is a front view of a main part of a power wind turbine showing a third embodiment.

FIG. 6 is a front view of a main part of a power wind turbine showing a fourth embodiment.

FIG. 7 is a front view of a main part of a power wind turbine showing a fifth embodiment.

FIG. 8 is a perspective view of a wind power generator showing a second embodiment.

FIG. 9 is a front view of a wind power generator showing a third embodiment.

[Explanation of symbols]

(1) Power wind turbine (2) Spindle (3) Bearing (4) Bearing (5) Rotating support (5a) Top mounting part (6) Support arm (66) Auxiliary support arm (7) Bolt (8) Annular support (9) Wind vane (99) Side wind receiving blade (10) Power generation unit (11) Generator (12) Transmission (13) Tower (13a) Flange (14) Cover (15) Wind generator (16) Magnet (stator) (17) Magnet (armature) (18) Building (19) Ring rack (20) Advertising display (21) Electronic bulletin board

Claims (12)

[Claims] 1. A plurality of support arms are attached to a main shaft in a radial direction, and an annular support is attached so as to connect the end portions of the respective support arms, and a fixed portion is provided around the periphery of the annular support. A power wind turbine characterized in that a plurality of wind receiving blades are detachably attached at intervals. 2. The power wind turbine according to claim 1, wherein the support arm is detachably attached to a rotary support attached to a main shaft. 3. The wind turbine for power according to claim 1, wherein the annular support is divided into a plurality of parts in a radial direction along a circumference and is assembled. . 4. The power wind turbine according to claim 1, wherein an auxiliary support arm is attached to the support arm. 5. A plurality of wind receiving blades are arranged along the length of the support arm.
A wind turbine for power listed in any one of. 6. The wind turbine for power according to claim 1, wherein an annular rack is mounted on the lower part of the plurality of support arms in a concentric arrangement with the main shaft. 7. The sliding support member for supporting the distal end portion of the long support arm from below is disposed below the plurality of support arms. The described power turbine. 8. A plurality of support arms are mounted on a main shaft protruding from a bearing at regular intervals in a radial direction, and an annular support is detachably mounted so as to connect the tip ends of the support arms, A plurality of wind receiving blades are detachably attached to the peripheral portion of the annular support, and the specifications and the number of the supporting arms, the annular support, and the wind receiving blades can be changed and attached according to geographical conditions. A wind power generator characterized by being configured as described above. 9. A magnet is disposed below the support arm, and a magnet that repels the magnet is annularly disposed around the main shaft so as to face the magnet below the magnet with a predetermined gap therebetween. The wind power generator according to claim 8, wherein the repulsion of the magnet prevents the distal end of the long support arm from falling. 10. A structure in which a plurality of support arms are arranged at regular intervals in a radial direction on a main shaft protruding from a bearing, and a wind receiving blade is attached to a tip end portion of each support arm. In addition, an annular rack is mounted in a concentric arrangement with the main shaft, and a plurality of generators are arranged below the annular rack so as to rotate and generate electric power as the annular rack rotates. Characteristic wind power generator. 11. The wind power generator according to claim 7, wherein a lower part of the building is integrally formed. 12. The wind power generator according to claim 7, wherein an advertisement display is mounted on the surface.