JP2024033643A - Wind power generator - Google Patents

Abstract

To provide a wind power generator which can achieve downsizing of the wind power generator, smoothly move according to a direction of wind, and continuously generate electric power in a stable manner without stopping power generation.SOLUTION: A windmill 30 of a wind power generator 1 is rotatably held by one end 20A of a body 20, and a power generator 40 is held by the other end 20B of the body 20. A horizontal shaft part 23 which transmits rotational motion from the windmill 30 to the power generator 40 is housed in the body 20. The windmill 30 has multiple blades 31 which receive a force of wind W from the power generator 40 side in a direction of the windmill 30. A centroid G between the windmill 30 and the power generator 40 at the body 20 matches with an axis center L of a tower.SELECTED DRAWING: Figure 5

Description

The present invention relates to a wind power generator that generates power by rotating blades using wind power.

A wind power generator uses the power of the wind to rotate a windmill, transmitting the rotational motion of the windmill to a generator, and the generator generates electricity.
Patent Document 1 discloses a wind power generator including three blades, a support, and a tubular housing. A tubular housing is attached to the upper part of the column of this wind power generator, and a shaft is rotatably supported by the tubular housing. A triangular plate is fixed to the tip of the shaft. On the other hand, the root of each blade is connected to the main hub member via each flat plate. The root of each blade and one end of each flat plate are connected by a first hinge of a mechanical connection structure, and the end of the main hub member and the other end of each flat plate are connected by a second hinge of a mechanical connection structure. connected. The triangular flat plate and each flat plate are connected by coil springs.

Due to this structure of the wind power generator, the first and second hinges serve as folds of each blade with respect to the main hub member, and the elastic force of the coil spring pulls each flat plate toward the triangular flat plate. Therefore, each blade is positioned at rest with it biased toward the triangular plate. In other words, when the tip of each blade is pushed by the force of the wind and rotates, the centrifugal force acting along the length of the blade acts against the elastic force of the coil spring, causing the wind speed to rotate. Generate electricity. By making the pitch angle of the blade gradually decrease as the pitch angle increases, the rotational speed of the blade is held constant.

Special table No. 5-503559

However, in the structure of a conventional wind power generator, the root of each blade and one end of each flat plate are connected by a first hinge, and the end of the main hub member and the other end of each flat plate are connected by a second hinge. The blades are connected by a spring, and the movement of each blade is restricted by a spring.

For this reason, when the force of the wind, especially strong winds or storms blows, the force of the wind on each blade increases beyond a certain level, the first and second hinges of the blade or flat plate cannot withstand it and break. There is a risk that stable power generation will not be possible.

Moreover, a windmill with three blades is rotatably attached to one end of the tubular housing, but nothing is attached to the other end of the tubular housing, so it rotates according to the direction of the wind. The weight balance of the tubular housing is not good. For this reason, although the tubular housing is rotatably attached to the support column, it may not be able to properly follow the direction of the wind and rotate, resulting in a decrease in power generation efficiency.

Another type of conventional wind power generator includes a variable pitch mechanism that mechanically changes the orientation of the blades in response to the force of the wind. However, a wind power generator equipped with this variable pitch mechanism has a complicated structure, inevitably increases in size and weight, and it is not easy to install the wind power generator.

The present invention was made in order to solve the above problems, and it is possible to downsize a wind power generator, and it can successfully follow the direction of the wind and continuously and stably generate electricity without stopping. The purpose is to provide a wind power generator that can generate electricity.

According to the present invention, the above-mentioned problem is solved by a wind power generator that rotates a windmill using wind power and transmits the rotational motion of the windmill to a generator to convert it into electricity, which includes a tower and a wind turbine in the tower. a rotatably supported body, the windmill is rotatably held at one end of the body, the generator is held at the other end of the body, and the windmill is rotatably supported at the other end of the body; A horizontal shaft portion that transmits rotational motion is housed in the main body, and the wind turbine has a plurality of blade members that receive the force of the wind from the generator side toward the wind turbine, and the wind turbine and the power generator in the main body are connected to each other. This is achieved by the wind power generator of the present invention, characterized in that the center of gravity between the wind power generator and the wind power generator is aligned with the axial center of the tower.

According to the present invention, since the center of gravity between the wind turbine and the generator in the main body is aligned with the axial center of the tower, the main body follows the direction of the wind that changes from moment to moment and moves around the axis of the tower. It rotates smoothly and allows wind to constantly be directed from the generator side to the windmill side, allowing the generator to continuously generate electricity. Furthermore, the distance between the generator and the tower axis can be reduced. For this reason, it is possible to downsize wind power generators, and they can follow the direction of the wind well and generate power continuously and stably without stopping.

In the present invention, preferably, the generator is formed to be thin in the axial direction of the horizontal shaft portion, and the generator includes a rotor connected to the horizontal shaft and having a magnet, and a rotor that is connected to the horizontal shaft to rotate the windmill. and a stator having a coil that generates power by synchronously rotating the rotor, and the generator is a brushless generator.

According to the present invention, the rotor of the generator is connected to the horizontal shaft, and since the generator is a brushless generator with a simple structure, the wind power generator can be made smaller and lighter.

The present invention is preferably characterized in that the wind turbine and the rotor of the generator are directly connected by the horizontal shaft without using a gearbox.

According to the present invention, since there is no need to provide a gearbox to the main body, the main body can be made smaller and lighter, and wind can always be applied from the generator side to the windmill side, and the generator can be continuously operated. can be used to generate electricity.

In the present invention, preferably, the main body includes a wind direction guide part that orients the main body to directly face the direction of the wind so that the main body is directed from the generator side toward the wind turbine in a direction in which the force of the wind is received. The wind direction guiding part is arranged between the main body and the upper part of the tower.

According to the present invention, the wind direction guide section is oriented directly toward the direction of the wind so that it receives the force of the wind from the generator side toward the wind turbine, so it follows the direction of the wind that changes from time to time. The tower rotates around its axis, allowing wind to be constantly directed from the generator to the windmill, allowing the generator to continuously generate electricity.

The present invention is preferably characterized in that the main body is tapered from a portion holding the generator to a portion holding the windmill.

According to the present invention, the main body is tapered from the part that holds the generator to the part that holds the windmill, so that the tower can follow the direction of the wind that changes from moment to moment. It rotates around its axis, allowing wind to constantly be applied from the generator side to the windmill side, allowing the generator to continuously generate electricity.

In the present invention, preferably, the wind turbine includes a central member fixed to the horizontal shaft, a fixed member fixed to the horizontal shaft facing the central member at a distance, and a plurality of fixing members fixed to the horizontal shaft while facing the central member at a distance. a connecting member disposed between the base of each of the blade members and the center member to connect the base of the blade member and the center member; and a connecting member on the base side of the blade member. The blade is disposed between the connecting member and the fixing member, and is generated by the force of the wind when the blade member receives the force of the wind from the generator side in the direction of the windmill. an elastic mechanism section that suppresses movement of the member, and the connecting member is provided on the base side of the blade member and bends the blade member relative to the connecting member when receiving the force of the wind. a first bending portion that increases the pitch angle of the blade member with respect to the direction of the wind force; a second bending part that is bent to further increase the pitch angle of the blade member with respect to the direction of the wind force, and after the connecting member is bent with respect to the central member at the second bending part; Further, when receiving a stronger force of the wind, the first bending portion is further bent in order to release the force of the wind, thereby further increasing the pitch angle of the blade member with respect to the direction of the force of the wind. Features.

According to the present invention, the first bending portion of the connecting member bends the blade member relative to the connecting member when receiving wind force, thereby increasing the pitch angle of the blade member with respect to the direction of the wind force, so that the first bending portion of the connecting member The second bending portion bends the connecting member relative to the central member when receiving a strong wind force, thereby further increasing the pitch angle of the blade member with respect to the direction of the wind force. Moreover, when the connecting member is bent with respect to the central member at the second bending part and then receives a stronger wind force, the first bending part is further bent to release the wind force, and the blades in the direction of the wind force are bent. The pitch angle of the member can be further increased. As a result, when the generator generates electricity in response to the wind force, the pitch angle of the blade members is continuously changed according to the magnitude of the wind force, so the generator is able to generate electricity when the wind force suddenly It is possible to continuously generate electricity without damaging the blade members and without interrupting the power-generating operation even when the wind force increases and becomes stronger. The wind power generator of the present invention has a configuration in which only the wind turbine, generator, and horizontal shaft are mounted on the main body, so the wind turbine can be made smaller and will not be damaged even if the wind force increases. It is possible to continuously and stably generate power without stopping power generation.

In the present invention, it is preferable that the tower has a tower drive operation part that can be moved from an upright state to a maintenance state for maintenance by being folded down relative to the installation part of the tower.

According to the present invention, the tower drive operation section can shift the main body, wind turbine, and generator to a maintenance state during maintenance, so maintenance can be easily performed.

According to the present invention, it is possible to downsize the wind power generator, and to provide a wind power generator that can successfully follow the direction of the wind and continuously and stably generate power without stopping. can do.

FIG. 1(A) is a side view of a wind power generator according to an embodiment of the present invention, and FIG. 1(B) is a front view of the wind power generator. FIG. 2 is a perspective view showing the main body, windmill, and generator shown in FIG. 1. FIG. FIG. 3 is a diagram illustrating a generator and the like viewed from the V direction in FIG. 2. FIG. 1 is a perspective view showing a portion of a windmill, an example of the internal structure of the main body, and a generator. 5 is a diagram showing a part of the windmill, an example of the internal structure of the main body, and a generator as seen from the V1 direction in FIG. 4. FIG. It is a top view which shows the example of a shape of a center member. It is a top view which shows the connection state of a center member, a connection member, and three blades. FIG. 2 is a perspective view showing a connected state of a central member, a connecting member, blades, and an elastic mechanism part that constitute a wind turbine. FIG. 3 is a perspective view showing a connected state of a central member, a connecting member, blades, and an elastic mechanism part that constitute a wind turbine from another angle. It is a figure which shows the example of a shape of a connection member. FIG. 3 is a cross-sectional view of the connecting member taken along line JJ. It is a figure which shows the example of the reinforcing member arrange|positioned in the main layer of a connection member. It is a figure which shows the example of a connection structure in which a connection member can be attached and detached. FIG. 14(A) is a front view showing a preferable structural example of the elastic mechanism section, and FIG. 14(B) is a sectional view taken along the line AA in FIG. 14(A). FIG. 6 is a diagram showing the state of the blade when receiving the force of the wind W. FIG. 3 is a perspective view showing the state of the blade when subjected to wind force. FIG. 7 is a perspective view showing another state of the blade when subjected to wind force. It is a figure which shows the example of a change of the 1st elastic member and the 2nd elastic member by the 1st elastic member and the 2nd elastic member of an elastic mechanism part exerting a tensile elastic force. FIG. 19(A) shows an example of the relationship between the wind power output and wind speed of the wind power generator according to the embodiment of the present invention, and FIG. 19(B) shows an example of the relationship between the wind power output and wind speed of the wind power generator of the comparative example. FIG.

Below, preferred embodiments of the present invention will be described in detail with reference to the drawings.
The embodiments described below are preferred specific examples of the present invention, and therefore have various technically preferable limitations. However, the scope of the present invention does not particularly limit the present invention in the following description. Unless otherwise specified, the embodiments are not limited to these embodiments. Further, in each drawing, similar components are denoted by the same reference numerals, and detailed description thereof will be omitted as appropriate.

(Overall explanation of generator 1)
FIG. 1 shows a wind power generator according to an embodiment of the invention. FIG. 1(A) is a side view of a wind power generator 1 according to an embodiment of the present invention, and FIG. 1(B) is a front view of the wind power generator 1. The wind power generator 1 shown in FIG. 1 is a wind power generator that has a propeller-type wind turbine 30 having a plurality of blades 31 and generates power using the power of the wind. As shown in FIG. 1(A), this wind power generator 1 is a horizontal type wind power generator having a horizontal axis 23 in which the rotation axis of the wind turbine 30 is horizontal.

The wind power generator 1 uses natural energy and does not emit carbon dioxide or the like during power generation, so it is environmentally friendly. This wind power generator 1 can stably and continuously generate power without stopping power generation even in areas with weak winds, strong winds, and areas with strong wind strength, has high power generation efficiency, and produces less noise. It can be installed in a variety of locations such as remote islands and remote areas. The wind power generator 1 can be used, for example, for household power generation, agricultural power generation, telecommunications business power generation, public utility power generation, power generation on remote islands, and the like. For safety reasons, wind turbines that are commonly used must stop rotating and generate electricity in strong winds exceeding 25 m/sec. However, the wind power generator 1 according to the embodiment of the present invention is capable of preventing damage to the wind turbine 30 and interrupting the power generation operation even in an environment where a strong low pressure, typhoon, etc. pass and the speed exceeds 25 m/sec. It has the feature of being able to generate electricity continuously without any problems.

Moreover, the wind power generator 1 can continuously generate electricity even in an environment where the wind speed is 70 m/sec or more in class 1, for example, and even when other ordinary wind power generators are forced to stop due to strong winds. , power generation operation can be continued. In particular, even in strong winds such as typhoons or storms, the wind power generator 1 can continue power generation without interruption, making it possible to secure a power source in remote islands, polar regions such as Antarctica, on the ocean, on mountain tops, etc.
This wind power generator 1 has a simple structure and can minimize failures. As shown in FIG. 1(A), the wind power generator 1 includes a so-called downwind type wind turbine 30 that receives the force of the wind W from behind from the generator 40 side, so that the wind turbine 30 automatically operates. Directly facing the main wind direction, it is possible to continue power generation by parrying not only normal weak winds W but also even stronger winds W such as strong winds and turbulence. The wind turbine 30 of the wind power generator 1 is a downwind type wind turbine capable of generating power of about 6.5 kW, for example, and is explosion-proof.

The wind power generator 1 has a simple structure, is small in size, and is lightweight, so installation work, maintenance work, and removal work are easy. The wind power generator 1 can generate renewable energy that is locally produced and consumed locally, and can contribute to a low-carbon, recycling-oriented society. The wind power generator 1 can be used in a wide variety of applications, such as communication bases, industrial and railway applications, electric vehicle power supply, desalination facilities, and military applications.

The wind power generator 1 shown in FIG. 1 uses the force of the wind W to rotate a windmill 30, transmits the rotational motion of the windmill 30 to a generator 40, and converts it into electricity. The wind power generator 1 roughly includes a tower 10 that is a support, a main body 20, a wind turbine 30 that is a rotor, and a generator 40.
The windmill 30 has a plurality of blades 31 (in the illustrated example, three windmills 30). The wind energy of the wind W that the wind turbine 30 can receive is proportional to the receiving area of the wind W on the blades 31, that is, it is proportional to the square of the diameter of the wind turbine 30, which is a rotor, and is proportional to the cube of the wind speed of the wind W. It is known that they are proportional. For this reason, it is important that the wind turbine 30 be installed at a location where it can stably receive as much strong wind W as possible.

<Tower 10>
The tower 10 shown in FIG. 1 is made of metal such as iron, and is installed vertically around a vertical axis L with respect to an installation part 11, which is a foundation set in the ground, for example. It is being The tower 10 is tapered so that the lower part 12 is the thickest and gradually tapers toward the upper part 14. Thereby, the resistance of the wind W in the tower 10 is reduced, and weight reduction is achieved.
A tower drive operation section 13 is provided between the installation section 11 and the lower part 12 of the tower 10. The tower drive operation unit 13 can be tilted down to the ground side along the Q direction from an upright position with respect to the installation unit 11 of the tower 10 as shown in FIG. 40 etc. can be easily shifted to a maintenance state for maintenance.

Specifically, as shown in FIG. 1(B), the tower drive operation section 13 includes a hinge section 13A and an actuator 13B such as a hydraulic cylinder. When the rod 13C of the hydraulic cylinder 13B is contracted by a command from a control unit (not shown), the lower part 12 of the tower 10 can be tilted as shown in the Q direction with respect to the tower base 12R. By employing the hydraulic actuator 13B, the height of the wind turbine 30, generator 40, etc. can be lowered. Therefore, the tower drive operation section 13 can shift the main body 20, the wind turbine 30, and the generator 40 to the maintenance state during maintenance, so that maintenance can be easily performed. Installation work when installing the wind power generator 1 can be performed in a short period of time, and maintenance work on the wind turbine 30, the generator 40, etc. can be easily performed, and short-term maintenance work can be performed.

<Wind direction guide section 15>
FIG. 2 is a perspective view showing the main body 20, windmill 30, and generator 40 shown in FIG. As shown in FIGS. 1 and 2, a wind direction guiding section 15 is held in the upper part 14 of the tower 10 so as to be detachable and rotatable about a vertical axis L. A main body 20 is detachably fixed. In the example of the shape of the wind direction guide part 15 shown in FIG. 2, the thickness t1 of the wind direction guide part 15 on the generator 40 side is set larger than the thickness t2 of the wind direction guide part 15 on the wind turbine 30 side. It is tapered so as to gradually become thinner toward the thickness t2, that is, along the direction in which the wind W is received.

In this way, by adopting the tapered structure of the wind direction guide section 15, the wind direction guide section 15 rotates the main body 20 around the vertical axis L according to the direction of the wind W. Therefore, the main body 20 can be oriented directly in the direction of the wind W so that the force of the wind W can be effectively received from the generator 40 side toward the wind turbine 30. As a result, the wind turbine 30 of the main body 20 automatically faces the main wind direction so as to receive the wind W from behind, so that it can handle not only the normal weak wind W but also the stronger wind W such as strong wind or turbulence. You can parry it and continue generating electricity. Moreover, since there is no need to separately provide a conventionally used yaw control device having a complicated structure, the weight of the wind power generator 1 can be reduced, the structure can be simplified, and the cost can also be reduced.

<Body 20>
On the other hand, as shown in FIGS. 1A and 2, the wind turbine 30 is rotatably held at one end 20A of the main body 20, and the generator 40 is held at the other end 20B of the main body 20. The wind turbine 30 includes, for example, three blades 31 of the same size and structure, and as shown in FIG. 2, each blade 31 extends radially every 120 degrees around the rotation center C. To give an example of dimensions, the diameter D of the wind turbine 30 shown in FIG. 1(B) is, for example, 5.6 m. The total height H of the wind power generator 1 including the wind turbine 30 is, for example, 17.8 m. The height H1 to the center of the main body 20 shown in FIG. 1(A) is, for example, 15 m.

Next, the main body 20 and the wind turbine 30 will be further explained with reference to FIGS. 2 to 5.
FIG. 3 is a diagram showing the generator 40 and the like viewed from the V direction in FIG. 2. FIG. 4 is a perspective view showing a portion of the windmill 30, an example of the internal structure of the main body 20, and the generator 40. In FIG. 4, illustration of the casing of the main body 20 is omitted. FIG. 5 is a diagram showing a portion of the wind turbine 20, an example of the internal structure of the main body 20, and the generator 40 as viewed from the V1 direction in FIG.

The main body 20 shown in FIGS. 1A and 2 is also called a nacelle, and is made of a metal with excellent weather resistance, such as iron or stainless steel, in a cylindrical shape. As shown in FIG. 5, preferably, the diameter of one end 20A of the main body 20 is set smaller than the diameter of the other end 20B, and gradually tapers from the other end 20B to the one end 20A. It is formed like this. Thereby, the wind W can be easily guided to each blade 31 side of the wind turbine 30 along the outer circumferential surface of the main body 20, and the wind turbine 30 on the one end 20A side can be automatically made to directly face the main wind direction. As a result, the wind turbine 30 of the main body 20 automatically faces the main wind direction, and continues to generate power by deflecting the wind force not only from normal weak winds W but also from stronger winds W such as strong winds and turbulence. can.

As a result, the wind turbine 30 of the main body 20 automatically faces the main wind direction so as to receive the wind W from behind, so that it can handle not only the normal weak wind W but also the stronger wind W such as strong wind or turbulence. You can parry it and continue generating electricity. By adopting both or one of the characteristic tapered structure of the main body 20 and the characteristic tapered structure of the wind direction guide section 15 described above, a large yaw control device having a conventionally used complicated structure can be achieved. Since there is no need to separately provide the wind power generator 1, the weight of the wind power generator 1 can be reduced, the structure can be simplified, and costs can also be reduced.

<Horizontal axis 23>
As shown in FIGS. 2, 4, and 5, a horizontal shaft 23 passes through the center of the main body 20, and as shown in FIG. 5, is horizontally and rotatably supported by two bearings 21 and 22. There is. A wind turbine 30 is removably fixed to one end of the horizontal shaft 23. A rotor 41 of a generator 40 is removably provided at the other end of the horizontal shaft 23 .

<Generator 40>
Next, the generator 40 will be explained.
As shown in FIGS. 3 to 5, the generator 40 is, for example, a brushless direct drive permanent magnet type generator, and has a rated output of, for example, 6.5 kW. As shown in FIG. 5, the generator 40 has a rotor 41 and a stator 42, and is preferably sealed with resin to protect it from salt damage and water damage. The rotor 41 has a magnet, and the stator 42 has a coil. The rotor 41 is detachably fixed to the other end of the horizontal shaft 23. The stator 42 generates electricity by generating a three-phase alternating current electromotive force at, for example, 300 V by rotating the rotor 41 in synchronization with the rotation of the windmill 30 caused by the normal weak wind W or stronger wind W. .
The rotor 41 of the generator 40 employs a direct drive system in which it is directly connected to the wind turbine 30 via the horizontal shaft 23 without using a gearbox. Since the windmill 30 preferably rotates in a rotation range of about 200 rpm to 250 rpm due to the force of the wind W, for example, a gearbox is not required between the windmill 30 and the rotating shaft 23. Thereby, compared to the case of a wind power generator using a normal gearbox, the structure of the mechanical part in the main body 20 of the wind power generator 1 can be simplified and the weight can be reduced.

As shown in FIG. 1A, power generated by the generator 40 is sent to a rectifier 151 and stored in a battery (storage battery) 153 via an inverter 152, and the stored power is transferred to a power supply target 154. supplied to The electric power generated by the generator 40 is, for example, three-phase 300V, and the rectifier 151 rectifies the generated electric power, and the inverter 152 converts the generated electric power to, for example, three-phase 200V, and then stores the power in the battery 153. For example, when the wind power generator 1 is installed on a remote island, the power supply target 154 may be a public facility provided on the remote island, but is not particularly limited.

As shown in FIG. 5, the thickness N of the horizontal shaft 23 of the generator 40 along the axial direction RT is made as thin as possible. The axial direction RT and the vertical axis L of the tower 10 are orthogonal to each other. An extension shaft 14B is attached to the upper end 14 of the tower 10, and a base 20F of the main body 20 is detachably fixed to the upper end of the extension shaft 14B. The two bearings 21 and 22 mentioned above are fixed to this base 20F. The bearing 21 is fixed at a position closer to the wind turbine 30, and the bearing 22 is fixed at a position closer to the generator 40. Note that, as shown in FIGS. 4 and 5, the framework that constitutes the wind direction guide section 15 includes a member 15B and a member 15C.

In this way, a thin generator 40 having a small thickness N is used, and the mounting position of the generator 40 in the main body 20 is as close as possible to the vertical axis L. A distance K1 from the outer surface of the stator 42 of the generator 40 to the vertical axis L is shorter than a distance K2 from the center position of the wind turbine 30 to the vertical axis L. In the structure consisting of the main body 20, the windmill 30, and the generator 40, the center of gravity G of the windmill 30, the main body 20, and the generator 40, which is heavier than the windmill 30, is aligned with the vertical axis L of the tower 10. . As a result, the structure consisting of the main body 20, the windmill 30, and the generator 40 can optimize the weight balance around the vertical axis L, and can rotate smoothly around the vertical axis L according to the direction of the wind W. . Since the distance K1 between the generator 40 and the vertical axis L can be made smaller than the distance K2, the wind power generator 1 can be made smaller. The main body 20 rotates around the vertical axis L, and automatically faces the main wind direction against the wind W coming from behind the wind turbine 30, so that it can face not only the normal weak wind W but also the strong wind. Even strong winds such as turbulence can be deflected and power generation can continue.

<Structural example of wind turbine 30>
Next, a preferred structural example of the wind turbine 30 will be described.
As shown in FIGS. 2 and 4, the wind turbine 30 is a downwind type wind turbine that receives wind W from the front of the generator 40, as described above, and the wind turbine 30 automatically adjusts to the main wind direction. can be used against

<Blades 31 of windmill 30>
As shown in FIGS. 2 to 4, the wind turbine 30 has three blades 31. Each blade 31 is made of, for example, a glass thermoplastic resin composite material, and is a plate-shaped member that maintains its shape without being deformed by the wind W and does not break even when it receives a wind W stronger than 70 m/sec, for example. It is. That is, the blade 31 is resistant to wind speeds of class 1 (70 m/sec), and can operate continuously without stopping power generation even when the wind speed exceeds 70 m/sec. As shown in FIG. 4, the blade 31 has a base portion 31B, a tip portion 31C, and an intermediate portion 31D.The base portion 31B is the widest, and as you go from the intermediate portion 31D to the tip portion 31C, The width is gradually narrowing. The thickness of each blade 31 is, for example, uniform from the base 31B to the tip 31C, or gradually thinner from the base 31B to the tip 31C, but is not particularly limited. Thereby, the wind turbine 30 is not damaged, and the wind power generator 1 can continuously generate power.

FIG. 4 shows the pitch angle α of the blade 31. The "pitch angle α" of the blades 31 is the angle formed by the surface of the blades 31 with respect to a plane of rotation PL centered on the horizontal axis 23 of the wind turbine 30, which is perpendicular to the direction of the wind W.
The pitch angle α of the blade 31 does not change even if it receives the force of a weak wind W, but when it receives the force of a stronger wind W, the blade 31 changes in the direction of the force of the wind W in order to release the force of the stronger wind W. The pitch angle α is gradually increased. The blade 31 will not be damaged even if it is hit by a stronger wind W such as a low pressure or a typhoon. An example of how the pitch angle α of the blade 31 changes will be described later. As illustrated in FIG. 4, the angular range of the pitch angle α can be changed, for example, preferably from an initial setting angle of 6 degrees to a maximum angle of 17 degrees. The initial setting angle of 6 degrees is when the wind W is not hitting the blade 31 set in advance, and the maximum angle of 17 degrees is when a stronger wind W of, for example, 70 m/sec or more is hitting the blade 31. This is the angle of the case.

<Central member 50 and fixed member 60>
As shown in FIGS. 2 to 5, the wind turbine 30 includes blades 31, which are an example of three blade members, one delta-shaped central member 50, another delta-shaped fixed member 60, and three connections. It has a member 70 and three sets of elastic mechanism parts 100.
FIG. 6 is a plan view showing an example of the shape of the central member 50. FIG. 7 is a plan view showing a state in which the central member 50, the connecting member 70, and the three blades 31 are connected. FIG. 8 is a perspective view showing a connected state of the central member 50, the connecting member 70, the blades 31, and the elastic mechanism section 100 that constitute the wind turbine 30. FIG. 9 is a perspective view showing the connected state of the central member 50, the connecting member 70, the blades 31, and the elastic mechanism part 100 that constitute the wind turbine 30 from another angle. Note that in FIGS. 4, 5, and 7 to 9, a portion of the wind turbine 30 is illustrated for the sake of simplification of the drawings.

The central member 50 shown in FIGS. 6 to 9 is a rotating hub of the wind turbine 30, and is made of a metal plate made of iron or the like in a substantially equilateral triangular shape. As shown in FIGS. 8 and 9, the central member 50 is fixed at the tip of the horizontal shaft 23. As shown in FIGS. The center member 50 has a plurality of holes 50H for connection and one center hole 50R. The horizontal shaft 23 passes through the center hole 50R, and the horizontal shaft 23 and the center member 50 are fixed. The plurality of holes 50H are arranged in series along three linearly formed sides 50S of the central member 50, respectively.

On the other hand, as shown in FIGS. 8 and 9, the fixing member 60 is made of a metal plate such as iron in the shape of an equilateral triangle, for example, in the same manner as the center member 50. It is fixed at a midway position of the horizontal shaft 23 so as to face the central member 50 . However, each vertex 60S of the fixed member 60 is located at a position corresponding to the center position of one side 50S of the central member 50. As shown in FIG. 5, the center member 50 and the fixed member 60 are rotated in the main body 20, using two bearings 21 and 22, together with the horizontal shaft 23, around the axial direction RT of the horizontal shaft 23. It is now possible. Note that a reinforcing member 60J for reinforcement is provided between the center member 50 and the fixed member 60, so that even if a strong wind W blows, the relative position and spacing between the center member 50 and the fixed member 60 will be maintained. , and prevents the center member 50 and the fixing member 60 from deforming.

<Connecting member 70>
Next, the connecting member 70 will be explained with reference to FIGS. 7 to 13.
10 is a front view showing an example of the shape of the connecting member 70, and FIG. 11 is a sectional view of the connecting member 70 taken along the line JJ. As shown in FIG. 10, the connecting member 70 is a plate-like member having a substantially right-angled triangular shape, and is elastically deformable. As shown in FIGS. 7 and 8, the connecting member 70 is disposed between the base 31B of each blade 31 and each side 50S of the center member 50, and is arranged between the base 31B of each blade 31 and each side 50S of the center member 50. The side portion 50S is removably connected to the side portion 50S.

As shown in FIG. 10, the connecting member 70 includes a linear first edge 66, a linear second edge 67, a linear first side 68, and a linear second side 69. , a linear first bent portion 71 , and a linear second bent portion 72 . The first edge 66 is inclined with respect to the second edge 67 at an angle θ, most preferably on the order of 45 degrees, for example. This angle θ is preferably selected in the range of 30 degrees to 60 degrees, so that when each blade 31 receives a stronger wind W, by reducing the area where the wind W is received by the blade 31, the wind is stronger. When receiving the wind W, the rotation of the wind turbine W is intentionally stalled to some extent. Therefore, the thrust force applied to the horizontal shaft 23 of the main body 20 can be reduced while suppressing the rotation of the windmill 30, so that the force applied from the main body 20 to the tower 10 itself can be reduced. Thereby, even if a very strong wind W blows, the force applied to the tower 10 itself can be reduced, the thickness of the tower 10 itself can be reduced, and the wind power generator 1 can be downsized. If the angle θ is smaller than 30 degrees or larger than 60 degrees, each blade 31 of the wind turbine 30 will be susceptible to extremely strong wind W, which is not preferable.

As shown in FIG. 10, the first side 68 and the second side 69 are parallel, and the first side 68 and the second side 69 are perpendicular to the second edge 67. The first bent portion 71 is formed parallel to the first edge 66 , and the second bent portion 72 is formed parallel to the second edge 67 . The first bent part 71 and the second bent part 72 are made, for example, by making the thickness a little thinner than the other parts. As shown in FIGS. 8 and 9, each first edge 66 is removably fixed to the base 31B of each blade 31. As shown in FIGS. Further, each second edge 67 is detachably fixed to each side 50S of the central member 50. As a result, when receiving the force of the wind W, the first bending portion 71 bends the base portion 31B of each blade 31 relative to the connecting member 70 in the C1 direction shown in FIG. 10(A) and FIG. It has a function of changing the pitch angle α of the blade 31 shown in FIG. Similarly, the second bending portion 72 has a function of bending the connecting member 70 relative to the central member 50 in the C2 direction shown in FIGS. 10(A) and 8 when receiving the force of the strong wind W.

As shown in FIG. 11, the connecting member 70 is formed of a main layer 75, a reinforcing member 76, and covering layers 77 and 78. The main layer 75 is made of a material with high flexibility and moldability, such as a resin elastomer, into a flat plate shape. The covering layers 77 and 78 are thin metal plates such as aluminum or stainless steel, and cover the front and back surfaces of the main layer 75 to ensure flexibility and weather resistance of the main layer 75.

FIG. 12 shows an example of the reinforcing member 76 disposed within the main layer 75 of the connecting member 70, and FIG. 12(A) shows a state where no force is applied to the connecting member 70. (B) shows how the connecting member 70 is bent in the C1 direction at the first bent portion 71. The reinforcing member 76 is disposed within the main layer 75 to reinforce tensile strength and bending strength, and is, for example, a rope made of resin such as polyester.

<Reinforcing member 76 of connecting member 70>
In the example shown in FIG. 12, the rope-shaped reinforcing member 76 is arranged uniformly and spirally over the entire main layer 75 of the connecting member 70. In the example shown in FIG. The Z direction (main direction) of the arrangement of the rope-shaped reinforcing member 76 is the direction from the first bent part 71 to the second bent part 72, and the rope-shaped reinforcing member 76 is bent alternately at the first edge 66 and the second edge 67. The first edge 66 and the second edge 67 are repeatedly arranged in parallel.
Furthermore, since the reinforcing member 76 is arranged so as to intersect the first bent part 71 and the second bent part 72, it not only reinforces the entire connecting member 70 but also strengthens the first bent part 71 and the second bent part 72. It also serves as reinforcement. The reinforcing member 76 particularly ensures tensile strength and bending strength in the Z direction from the first bent portion 71 to the second bent portion 72. As a result, even if each blade 31 receives not only a weak wind W but also a stronger wind W, the connecting member 70 is pulled or bent in the direction from the first bent part 71 to the second bent part 72. , it is possible to prevent the occurrence of cracks and rupture in the flexible main layer 75 shown in FIG. 11 . Therefore, the connecting member 70 is lightweight and there is no need to use a large, thick and durable metal member to ensure strength, and the blade 31 is connected to the central member 50 using the connecting member 70. Since the wind turbine 30 itself can be made smaller and lighter, even if the wind power increases, it can follow the wind power and continue to stably generate electricity without being damaged or stopping. can be used to generate electricity.

As shown in FIG. 10, a plurality of holes 66H and 67H for connection are formed along the linear first edge 66 and the linear second edge 67 of the connection member 70, respectively.
FIG. 13 is a diagram showing an example of a detachable connection of the connection member 70. FIG. 13 shows an example of a removable connection between the first edge 66 of the connection member 70 and the base 31B of the blade 31, and a removable connection between the second edge 67 of the connection member 70 and the side 50S of the central member 50. An example of connection is shown. The connection between the first edge 66 of the connection member 70 and the base 31B of the blade 31 and the connection between the second edge 67 of the connection member 70 and the side 50S of the central member 50 are both made of weather-resistant materials that are resistant to salt damage, for example. It is removably fixed using a bolt 80 and a nut 81 having a diameter. As a result, when performing periodic maintenance on the blade 31, the connecting member 70, and the central member 70, for example every five years, it is possible to easily disassemble the blade 31, the connecting member 70, and the central member 70 by removing the bolt 80 and nut 81. Maintenance and management of machine 1 becomes easier.

<Elastic mechanism section 100>
Next, the elastic mechanism section 100 will be described with reference to FIGS. 14, 4, 8, and 9.
14(A) is a front view showing a preferable structural example of the elastic mechanism section 100, and FIG. 14(B) is a sectional view taken along the line AA in FIG. 14(A).
As shown in FIGS. 8 and 9, one mounting base 103 and the other mounting base 104 of the elastic mechanism section 100 shown in FIG. It is removably fixed to the vicinity and to the fixing member 60, respectively. As shown in FIG. 2, when the blades 31 receive the force of the wind W from the generator 40 in the direction of the wind turbine 30, the elastic mechanism section 100 is moved against the central member 50 and the fixed member 60 by the force of the wind W. It has the role of suppressing the movement of the portion near the first bending part 71 of the connecting member 70 and the movement of the blade 31 by elastic force, for example, in the case of a wind W stronger than 70 m/sec. In this case, the pitch angle α of the blade 31 can be maximized to deflect the wind W.

In the configuration example of the elastic mechanism section 100 shown in FIG. 14, the elastic mechanism section 100 includes two first elastic members 101, 101, two second elastic members 102, 102, and two mounting bases 103, 104 has. The first elastic member 101 and the second elastic member 102 are both compression coil springs made of metal or resin, the second elastic member 102 is thicker than the first elastic member 101, and the spring constant of the second elastic member 102 is , is set larger than the spring constant of the first elastic member 101. The two first elastic members 101, together with the first bent portion 71 of the connecting member 70 shown in FIG. 10, move the blade 31 shown in FIG. When bent, it exerts elastic force on its own.

Next, the two second elastic members 102 have a stronger tensile elastic force than the first elastic member 101. Therefore, when the second elastic member 102 receives the force of the strong wind W and the second bending portion 72 of the connecting member 70 shown in FIG. 10 bends the connecting member 70 with respect to the central member 50 shown in FIG. Then, together with the first elastic member 101, it exerts a tensile elastic force.

In the illustrated example, the two first elastic members 101 and the two second elastic members 102 are arranged in parallel on the same plane between the two attachment bases 103 and 104. The two first elastic members 101 are arranged between the two second elastic members 102, and each second elastic member 102 is arranged at the left and right positions of the two first elastic members 101, respectively. has been done.
As shown in FIG. 8, one mounting base 103 is removably fixed to the first bent portion 71 side of the connecting member 70, and the other mounting base 104 is removably fixed to the edge portion 69 of the fixed member 60. has been done. One mounting base 103 is removably fixed to the first bending part 71 side of the connecting member 70, and is not directly fixed to the base 31B of the blade 31 because the blade 31 can relatively freely adjust the pitch angle. This is to ensure α.

By the way, both ends of the first elastic member 101 and both ends of the second elastic member 102 shown in FIG. 14 are fixed to mounting bases 103 and 104. Until the two first elastic members 101 receive the force of the weak wind W shown in FIG. 2 and the first bending part 71 shown in FIG. When exerting elastic force, the two second elastic members 102 serve as a dead region in which they do not exert tensile elastic force.

That is, when a weak wind W is applied to the blade 31, only the two first elastic members 101 first exert a tensile elastic force, but the two second elastic members 102 are not affected by the weak wind W. Since no force is applied, it is in a standby state without exerting any pulling force. When a force greater than the force of the stronger wind W is applied to the blade 31, in addition to the two first elastic members 101 exerting a tensile force, the two second elastic members 102 also exert a tensile force. It is designed to exert strong pulling force. The elastic mechanism section 100 can exert a nonlinear tensile elastic force by using two types of elastic members 101 and 102 having different spring ordinal numbers. If elastic members with the same spring constant are used, only linear tensile elastic force can be exerted.

In the embodiment of the present invention, the reason why the elastic mechanism section 100 adopts a structure in which the tensile elastic force is non-linear as described above is because the wind energy of the wind W is This is because it is proportional to the receiving area of the wind W, that is, it is proportional to the square of the diameter of the wind turbine 30 that is the rotor, and it is proportional to the cube of the wind speed of the wind W. As a result, the elastic mechanism section 100 is able to handle the wind turbine 30 including the three blades 31 even when the wind turbine 30, which includes the three blades 31, receives a weak force of the wind W or a force greater than or equal to the force of the stronger wind W that has suddenly increased. The windmill 30 can continuously rotate in response to sudden changes in wind energy, and each blade 31 of the windmill 30, the connecting member 70, and the central member 50 are not damaged. Note that in order to improve the weather resistance of the elastic mechanism section 100, the elastic mechanism section 100 may be covered with a film member or a plate member having excellent weather resistance, although not shown.

(Operation example and explanation of effects of wind power generator 1)
Next, an example of the operation and effects of the wind power generator 1 described above will be described with reference to the drawings from FIG. 15 onwards.
FIG. 15 shows a state in which the shape of the windmill 30 changes depending on the strength of the force of the wind W that the windmill 30 receives, and FIG. FIG. 15B shows an example of the state of the blades 31 of the wind turbine 30 receiving the force of the strong wind W.

Figures 16 (A) to 16 (C) and Figures 17 (D) to 17 (E) are affected by the force of strong wind W, stronger wind W, and very strong wind W from the force of windless wind W. FIG. 4 is a perspective view showing an example of the state of the blade 31 in the case of FIG.
Note that in the following description, the range of wind speeds that the wind turbine 30 receives and the value of the wind speed of the wind W are merely examples to make the description easier to understand, and are not limited.

First, the wind power generator 1 according to the embodiment of the present invention shown in FIG. 15 utilizes a downwind, which is wind W directed from the generator 40 toward the wind turbine 30, and uses a stronger wind W with a wind speed of 70 m/sec. However, the wind turbine 30 can continue generating electricity without stopping. On the other hand, in the case of commonly used wind power generators, when strong winds of about 25 meters blow, it is necessary to stop the rotation of the wind turbine and stop power generation to prevent damage to the wind turbine.

As shown in FIG. 15(A), the main body 20 of the wind power generator 1 has a wind direction guide part 15 that is tapered from the generator 40 side to the wind turbine 30 side. , located between the main body 20 and the upper part 14 of the tower 10. As a result, the wind direction guide unit 15 rotates the main body 2 around the vertical axis L so that the main body 20 is oriented in the direction in which the force of the wind W is received from the generator 40 side toward the wind turbine 30. , the blades 31 of the windmill 30 can be automatically made to directly face the direction of the wind W.

Moreover, the tubular or cylindrical main body 20 is tapered from the other end 20B, which is the part that holds the generator 40, to the one end 20A, which is the part that holds the windmill 30. . As a result, the main body 20 is rotated around the vertical axis L so that the main body 20 is automatically faced directly in the direction of the wind W so that the main body 20 is in a direction in which it receives the force of the wind W from the generator 40 side toward the wind turbine 30. can be done. Both of the tapered structure of the wind direction guide portion 15 and the tapered structure of the main body 20 may be employed, or at least one of them may be provided.
In any case, the wind turbine 30 employs a so-called free yaw structure that allows it to automatically face the direction of the wind W. Therefore, the wind power generator 1 according to the embodiment of the present invention does not require a separate yaw control device that is commonly used. Therefore, the structure of the wind power generator 1 can be simplified, and weight and cost can be reduced.

<Behavior of the wind turbine 30 in the wind speed range of the first stage ST1>
FIG. 16(A) shows the behavior of the wind turbine 30 in an example of the range of wind speeds in the first stage ST1. In this case, the range of wind speeds that the wind turbine 30 is subjected to is a range from a calm wind of 0 m/sec to a weak wind of about 11 m/sec as the wind speed of the wind W.
The blade 31 itself shown in FIG. 4 will not be deformed or damaged even if it is exposed to stronger winds W caused by low pressure, typhoons, or the like. In the first stage ST1 in which the blade W receives the force of a calm wind to a weak wind W, no bending phenomenon occurs at the first bending portion 71 of the connecting member 70 either. Therefore, the pitch angle α of each blade 31 remains unchanged at the initial setting angle α0 (6 degrees). Further, the elastic mechanism section 100 does not exhibit tensile elastic force. Thereby, while the blades 31 receive the relatively weak wind W of the first stage, the wind turbine 30 can be continuously rotated while the blades 31 are not damaged, and the generator 40 can generate electricity.

<Behavior of the wind turbine 30 in the wind speed range of the second stage ST2>
Next, FIG. 16(B) shows the behavior of the wind turbine 30 in an example of a range of wind speeds in the second stage ST2. In this case, the range of wind speeds that the wind turbine 30 receives is from a weak wind of 11 m/sec to a rather strong wind of about 20 m/sec.
When the blade 31 receives the force of the wind W in the second stage ST2, the blade 31 receives the force of the wind W, so that the first bent portion 71 of the connecting member 70 is bent with respect to the central member 50 and the connecting member 70. It is bent in the C1 direction. However, no force is applied to the elastic mechanism section 100, and the elastic mechanism section 100 does not exert any tensile elastic force. Thereby, the pitch angle α of the blade 31 can be slightly increased to the pitch angle α1 (α1>α0). By changing the attitude of each blade 31, the area of the blade 31 that receives the wind W decreases, so the rotation speed of the wind turbine 30 becomes approximately the same as in the first stage ST1, and the rotation of the wind turbine 30 stops. Never. Therefore, when the blades 31 receive the wind W in the second stage ST2, the wind turbine 30 rotates continuously and the generator 40 can generate electricity with a slight change in the attitude of the blades 31 themselves of the wind turbine 30. can. At this time, the shape of the blade 31 itself is not deformed at all.

<Behavior of the wind turbine 30 in the wind speed range of the third stage ST3>
Next, FIG. 16(C) shows the behavior of the wind turbine 30 in an example of the range of wind speeds in the third stage ST3. In this case, the range of wind speeds that the wind turbine 30 receives is from a slightly stronger wind of 20 m/sec to a stronger wind of about 50 m/sec. When the blade 31 receives the force of the strong wind W in the next third stage ST3, the force of the strong wind W causes the blade 31 to further resist the elastic force of the tension of the elastic mechanism part 100 and move the first part of the connecting member 70. The second bent portion 72 is bent in the C2 direction with respect to the center member 50. Thereby, the pitch angle α of the blade 31 can be increased to the pitch angle α2 (α2>α1). Therefore, the pitch angle α2 of the blade 31 becomes larger with respect to the direction of the wind W, so the blade 31 receives the wind W in a manner that allows the wind W to escape. By changing the attitude of each blade 31, the area of the blade 31 that receives the stronger wind W decreases, so the rotation speed of the wind turbine 30 is the same or lower than in the second stage ST2, but the wind turbine 30 never stops rotating. At this time, the shape of the blade 31 itself is not deformed at all. Therefore, when the blades 31 receive the wind W in the third stage ST3, the wind turbine 30 rotates smoothly and continuously, and the generator 40 generates electricity, with the attitude of the blades 31 of the wind turbine 30 further changing. Can be done.

<Behavior of the wind turbine 30 in the wind speed range of the fourth stage ST4>
Next, FIG. 17(D) shows the behavior of the wind turbine 30 in an example of the range of wind speeds in the third stage ST4. In this case, the range of wind speeds that the wind turbine 30 receives is a very strong wind W of 50 m/sec or more. When the blade 31 receives the force of an even stronger wind W in the next fourth stage ST4, the first bending part 71 of the connecting member 70 is bent against the connecting member 70 and the center member 50 due to the force of the wind W. Then, it is further bent in the C1 direction. As a result, although the shape of the blade 31 itself does not change, the attitude of the blade 31 further changes with respect to the connecting member 70 and the central member 50, and the pitch angle α of the blade 31 is the maximum angle α3 (α3=17 degrees>α2 ). Therefore, the blade 31 can receive the wind W while actively releasing the wind W. At this time, the shape of the blade 31 itself is not deformed at all. By changing the attitude of each blade 31, the area of the blade 31 that receives the stronger wind W decreases, so the rotation speed of the wind turbine 30 becomes the same as or lower than in the third stage ST3, but the rotation of the wind turbine 30 stops. There is no need to do anything, and you can prepare for the next change in the state of the wind W.

Then, for example, if the wind W returns to the range of the first stage ST1 shown in FIG. 17(A) again, the state of the wind turbine 30 returns to the state shown in FIG. 17(A). Moreover, if the wind W returns to the range of the second stage ST2 shown in FIG. 17(B) again, the state of the wind turbine 30 returns to the state shown in FIG. 17(B). Furthermore, if the wind W returns to the range shown in FIG. 17(C), the state of the wind turbine 30 returns to the state shown in FIG. 17(C).

In this way, the wind turbine 30 including the three blades 31 can continuously generate electricity while rotating smoothly without being damaged for a long period of time, regardless of the magnitude of the force of the wind W. During strong winds, the blades 31 are pushed in the direction of the wind W, but the force of the wind W is actively released by reducing the area of each blade 31 that receives the wind W depending on the wind speed. Moreover, the blade 31 itself is not deformed or damaged. Thereby, the wind power generator 1 can continue to generate power not only in a normal weak wind W but also in a strong wind W of 25 m/sec or more. The blades 31 are preferably made of a glass thermoplastic composite and are rigid and are suitable for strong winds exceeding 25 m/sec, even stronger such as reaching and exceeding 70 m/sec. Also, no deformation or damage will occur. Therefore, the wind power generator 1 can continue the power generation operation without stopping power generation.

FIG. 18 shows the first elastic member 101 and the second elastic member 102 that are generated when the first elastic member 101 and the second elastic member 102 of the elastic mechanism section 100 shown in FIGS. 8 and 14 exert tensile elastic force under the force of the wind. 2 shows a variation example of the elastic member 102. The horizontal axis in FIG. 18 shows the elongation of the first elastic member 101 and the second elastic member 102, and the vertical axis shows the load applied to the first elastic member 101 and the second elastic member 102.

As shown in FIG. 18, the linear region S0 indicates the case where a single spring with one type of spring constant is used, and the elongation against the load simply increases in direct proportion over the entire load range. are doing.
On the other hand, when the elastic mechanism section 100 of the embodiment of the present invention is used, in the linear region S1 where the thin first elastic member 101 exerts a tensile elastic force when the wind force is weak, the elongation with respect to the load is The slope is small and increases in direct proportion, and then in the linear region S2 where the wind force increases and the thick second elastic member 102 exerts tensile elastic force in addition to the thin first elastic member 101, the slope becomes sharp. , and then becomes a straight line region S3. As a result, the elastic mechanism section 100 can exert a nonlinear tensile elastic force in multiple stages of the linear regions S1, S2, and S3, unlike the normal elongation with respect to a load that always changes in the same linear region S0. The reason why such an elastic mechanism part 100 is adopted is that the force of the wind W increases as much as possible in accordance with the fact that the increase in the force of the wind W is non-linear, corresponding to the characteristic that the force of the wind W increases as the cube of the wind speed. This is to increase the power generation efficiency by changing the pitch angle α according to the wind speed.

FIG. 19(A) shows an example of the relationship between the wind power output and wind speed of the wind power generator 1 according to the embodiment of the present invention, and FIG. 19(B) shows the relationship between the wind power output and wind speed of the wind power generator of the comparative example. An example is shown.
As shown in FIG. 19(A), when the rated output of the generator 40 is, for example, 6.5 kW, and the cut-in wind speed is, for example, 2.5 m/sec, the wind power output of the generator 40 is cut off. It can generate electricity at maximum rated output starting from the wind speed. Moreover, since there is no cut-out wind speed, the wind turbine 30 does not stop rotating, so that additional power generation BT can be secured without the wind power generation output decreasing or disappearing at the cut-out wind speed. The blades 31 can continue to generate additional power regardless of the wind speed while balancing centrifugal force, centripetal force, and lifting force due to rotation. The cut-in wind speed of the wind turbine 30, which is the minimum rotatable wind speed, is, for example, 2.5 m/sec, and the cut-out wind speed, which is the maximum acceptable wind speed, is unlimited, so that even if the cut-out wind speed is applied to the wind turbine 30, it will not be damaged. It can continue to rotate and generate electricity without any problems.
On the other hand, in the comparative example shown in FIG. 19(B), the cut-in wind speed is 3 to 5 m/sec. When the cutout wind speed reaches 24 to 25 m/sec, the rotation of the wind turbine is forcibly stopped and the wind power output becomes zero, so compared to the embodiment of the present invention shown in FIG. The output decreases or disappears by the amount of V.

The wind turbine 30 of the wind power generator 1 described above rotates while balancing centrifugal force, lift force, and centripetal force applied to each blade 31, and each blade 31 rotates depending on the strength of the force of the wind W. By changing the area of the wind turbine, the wind turbine 30 can continue generating electricity without stopping even in strong winds or storms, while maintaining a rotational speed of, for example, 200 rpm to 250 rpm while releasing the force of the wind W. In addition, each blade 31 changes the pitch angle according to the strength of the force of the wind W, and reduces the area of the blade 31 itself that receives the wind, thereby releasing the force of the wind W, so that a "buzzing" wind noise is generated. The generation of noise can be suppressed, and the wind power generator 1 can be made quieter.

The wind power generator 1 does not require a conventional large-scale yaw control device, has a simple structure, and is less likely to malfunction. The wind power generator 1 can continue to generate electricity even under strong winds or storms, and can be installed in any harsh installation environment such as a remote island or uninhabited island. Examples of uses for the wind power generator 1 include telecommunications business, military purposes, industrial and railway businesses, international support projects, and seawater desalination projects, but the need for on-site maintenance and management is low. , can generate electricity stand-alone without relying on the domestic power grid. Moreover, this wind power generator 1 can be used as a substitute for conventionally used diesel generators and is environmentally friendly. The wind power generator 1 has a simple structure and can be miniaturized, so it can be transported by truck and installed only by human power.

The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the scope of the claims. A part of the configuration of the above embodiment may be omitted or may be arbitrarily combined in a manner different from that described above.
For example, the windmill 30 uses three blades, but may use two or four blades. Although the generator 40 has a magnet rotor and a coil stator, a coil rotor and a magnet stator may also be used. Note that the reinforcing member 76 does not have to be rope-shaped and may be, for example, net-shaped.

DESCRIPTION OF SYMBOLS 1... Wind power generator, 10... Tower, 11... Installation part, 12... Lower part of tower, 13... Tower drive operation part, 14... Upper part of tower, 15... Wind direction guide part, 20... Main body, 23... Horizontal shaft, 30... Windmill, 31... Blade (example of blade member), 31B... Base of blade, 40... Generator, 41... Rotor, 42... Stator, 50... Center member, 60... Fixed member, 70... Connecting member, 71... First bent portion of connecting member, 72... Connection Second bent portion of member, 75... Main layer, 76... Reinforcing member, 77, 78... Covering layer, 100... Elastic mechanism part, 101... First elastic member, 102... - Second elastic member, 151... Rectifier, 152... Inverter, 153... Battery (storage battery), 154... Power supply target, L... Vertical axis, RT... Axial direction, ST1...1st stage, ST2...2nd stage, ST3...3rd stage, ST4...4th stage, α, α0 to α3...pitch angle of blade, G...center of gravity , K1, K2...distance, PL...rotation plane, W...wind

Claims (7)

A wind power generator that rotates a windmill using the power of the wind, transmits the rotational motion of the windmill to a generator, and converts it into electricity,
tower and
a main body rotatably supported in the tower;
The windmill is rotatably held at one end of the main body, the generator is held at the other end of the main body, and a horizontal shaft portion that transmits the rotational motion from the windmill to the generator is housed in the main body. ,
The windmill has a plurality of blade members that receive the force of the wind from the generator side toward the windmill,
A wind power generator characterized in that a center of gravity between the wind turbine and the generator in the main body is aligned with an axial center of the tower. The generator is formed to be thin in the axial direction of the horizontal shaft portion,
The generator is
a rotor connected to the horizontal shaft and having a magnet;
The wind power generator according to claim 1, further comprising a stator having a coil that generates power by rotating the rotor in synchronization with the rotation of the wind turbine, and the generator is a brushless generator. Machine. The wind turbine generator according to claim 2, wherein the wind turbine and the rotor of the generator are directly connected by the horizontal shaft without a gearbox. The main body has a wind direction guide portion that orients the main body to face the direction of the wind so that the main body is directed in a direction in which the wind force is received from the generator side toward the wind turbine, and the wind direction guide portion The wind power generator according to any one of claims 1 to 3, wherein the wind power generator is disposed between the main body and an upper part of the tower. According to any one of claims 1 to 3, the main body is tapered from a portion that holds the generator to a portion that holds the wind turbine. Wind generator described. The windmill is
a central member fixed to the horizontal shaft;
a fixing member fixed to the horizontal shaft portion while facing the center member at a distance;
a plurality of blade members;
a connecting member disposed between the base of each of the blade members and the center member to connect the base of the blade member and the center member;
It is disposed between the connecting member on the base side of the blade member and the fixing member, and when the blade member receives the force of the wind from the generator side in the direction of the windmill, an elastic mechanism section that suppresses movement of the blade member relative to the fixing member caused by force;
Equipped with
The connecting member is provided on the base side of the blade member, and when receiving the force of the wind, bends the blade member with respect to the connecting member to change the pitch angle of the blade member with respect to the direction of the wind force. a first bending portion that is provided on the center member side and bends the connecting member relative to the center member when receiving a strong force of the wind, thereby increasing the force of the blade member in the direction of the wind force; a second bent portion that further increases the pitch angle;
When the connecting member is bent with respect to the central member at the second bending portion and then receives an even stronger force of the wind, the first bending portion is further bent to release the force of the wind. The wind power generator according to any one of claims 1 to 3, characterized in that the pitch angle of the blade member with respect to the direction of the force is further increased. 4. The tower has a tower driving operation section that can be moved from an upright state to a maintenance state for maintenance by collapsing the tower with respect to an installation part of the tower. The wind power generator described in .

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