JP2003269316A - Wind force power generation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wind force power generation device efficiently utilizing the wind force. <P>SOLUTION: Two wind mills 1 and 3 rotating upon receiving the force of natural winds for driving a generator 11 are installed coaxially overlapping in the direction to the front and rear. When both wind mills 1 and 3 in front and in the rear receive the wind and rotate, the rear wind mill 3 rotates in receiving not only the wind from the front but also the wind generated by rotation of the front wind mill 1. Particularly, the tip of each blade 12a of the front wind mill 1 rotates at a large peripheral speed, and the wind sent out backward from this part has a large wind speed, which the rear wind mill 3 will receive, and the rotations of the two wind mills 1 and 3 are performed efficiently. <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 wind turbine generator that produces electricity by utilizing the force of natural wind, and more particularly to a wind turbine generator capable of efficiently utilizing wind power.

[0002]

2. Description of the Related Art Wind power generators that generate electricity by utilizing natural wind force use the force of natural wind, which is considered to exist semipermanently, and utilize limited resources such as oil and coal. It has attracted attention as a power generation device that can replace the power generation device that generates power, and has been actively researched and developed, and is being put into practical use.

FIG. 15 is a schematic external front view of a conventionally known wind turbine generator. The wind power generator shown in FIG. 15 has a mounting body b as a wind power turbine having a built-in generator and the like installed at the tip of a support tower a and is rotatable in the horizontal direction. A blade d is fixed to the rotary shaft c at the tip of the mounting body b so as to rotate by receiving natural wind force. The blade d is made of, for example, a lightweight material such as an aluminum alloy plate, and is composed of two or more blades.
That is, the wind turbine generator of this example has a structure including a wind turbine e provided with three blades d fixed to the rotating shaft c at equal intervals of 120 degrees when viewed from the front. A power transmission mechanism is connected to the rotation shaft c, and a gear box for converting the rotation ratio and a generator are connected to the other end of the power transmission mechanism. The wind turbine e and the rotating shaft c have a direct connection structure, and when the wind turbine e rotates, power is transmitted to the generator (on the contrary, when the wind turbine stops, the generator also stops). When the wind turbine e receives wind and rotates, power is transmitted to a generator directly connected to the wind turbine e to generate power.

FIG. 6 is a characteristic diagram showing the relationship between the wind speed and the torque generated by the wind turbine in the case of such an operation.
FIG. 6A shows the case of the conventional example. In this characteristic diagram, when the wind speed [meter / sec: (m / s ·)] gradually increases from 0, the rotation of the wind turbine increases and the torque also increases. Then, when the wind speed reaches around 14 (m / sec), it reaches the rated torque of the wind power generator (which is said to be about 2100 Kg / m), and the torque does not rise even if the wind speed increases beyond that. However, in view of extremely strong wind such as a typhoon, another safety measure is structurally provided so that the direction of the windmill itself is changed by 90 degrees with respect to the direction in which the wind blows. This is to prevent damage to the wind turbine itself and the power transmission mechanism.

[0005]

However, in the conventional wind turbine generator as described above, power is generated from a single wind turbine e, and therefore power is generated from the wind turbine e. Only is transmitted to the generator and contributes to power generation.

Further, since the wind turbine e and the rotating shaft c are directly connected to each other, once the wind turbine e starts to rotate, the wind stops (the wind blows strongly, weakly, stops, or is capricious). ) This time, the generator side tries to continue rotation by inertial force, while the windmill e receives no power from the wind and thus acts to prevent rotation of the generator. Further, since the length of the blade d is about 10 meters or more, this resistance (moment) is considerably large.
Therefore, when the wind stops, the rotational speeds of the wind turbine e and the generator gradually decrease. Then, when the wind blows again, the windmill e rotates to transmit power to the generator.

As described above, at present, power is generated with a predetermined energy efficiency by repeating the operation of the above-mentioned conventional example. However, the conventional wind speed shown in FIG.
In terms of torque characteristics, it cannot be said that wind energy is efficiently directed to power generation. In other words, the efficiency is not sufficient and there is room for further improvement.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a wind turbine generator capable of efficiently utilizing wind power.

[0009]

According to a first aspect of the present invention, there is provided two wind turbines coaxially rotating in response to natural wind force to drive a generator. It has a configuration provided by being wrapped. With this configuration, when the front and rear wind turbines both receive wind and rotate,
In addition to the wind coming from the front, the wind turbine on the rear side receives and rotates the wind caused by the rotation of the wind turbine on the front side. Above all,
The tip of the blade of the wind turbine on the front side rotates at a large peripheral speed, and the wind sent backward from this part has a large wind speed, and the wind turbine on the rear side receives the wind with this large wind speed. Will be efficiently rotated.

The wind power generator according to a second aspect of the present invention is the wind power generator according to the first aspect, in which the length of the blade of the wind turbine that is on the front side with respect to the direction in which the wind blows is It has a configuration in which it is formed shorter than the length of the blade of the wind turbine on the rear side. With this configuration, if the length of the blade of the front wind turbine is set to be slightly shorter than the length of the blade of the rear wind turbine, most of the wind sent backward from the tip of the blade of the front wind turbine is The whole will hit the rear windmill, and the rear windmill will generate stronger torque and rotate. Thereby, the rotation of the wind turbine is efficiently performed.

A wind power generator according to a third aspect of the present invention includes a generator, a first wind turbine that rotates by receiving natural wind power to drive the generator, and an overlap with the first wind turbine. And a second windmill that is provided on the rear side of the first windmill and that receives natural wind to rotate to drive the generator, and between the first windmill and the second windmill and the generator. When the load is applied to the first wind turbine and the second wind turbine, the generator and the first wind turbine and / or the second wind turbine are interposed.
And a clutch means for reducing the rotational load on the generator side by disconnecting the connection with the wind turbine. With this configuration, when the first wind turbine and the second wind turbine both receive wind and rotate, the second wind turbine on the rear side is caused by the rotation of the first wind turbine on the front side in addition to the wind coming from the front. It will also receive and rotate, and the windmill will rotate efficiently. Further, when the wind speed weakens and the rotation speed of the wind turbine decreases, the power transmission between the wind turbine and the generator can be cut off, and only the generator side can be rotated for a long time in a state where the rotation load is small. When the wind speed increases and the rotation speed of the wind turbine increases, the clutch is locked and power transmission between the wind turbine and the generator is re-established, accelerating the generator from the wind turbine side and applying a strong torque. It can be rotated. Thereby, the generator can be efficiently driven.

A wind power generator according to a fourth aspect of the present invention is the wind power generator according to the third aspect, wherein the generator is a generator for the first wind turbine and a generator for the second wind turbine. It is configured to be provided. With this configuration, it is possible to control, for each wind turbine, the drive of the generator corresponding to the wind turbine.

A wind power generator according to a fifth aspect of the present invention is the wind power generator according to the third or fourth aspect, wherein the first wind turbine is used as a clutch means rather than the rotation of the generator. And / or a one-way clutch is used to which the clutch is connected when the second wind turbine is about to rotate quickly. With this configuration, it is possible to automatically detect the rotation of the wind turbine and control the clutch means.

According to a sixth aspect of the present invention, there is provided a wind power generator, wherein the generator, the first rotating shaft means, and the first rotating shaft means are arranged such that their centers are substantially aligned with each other. Two rotary shaft means, and a first wind turbine that is integrally rotatably attached to the first rotary shaft means and that rotates by receiving natural wind force;
A second wind turbine which is overlapped with the first wind turbine and is provided on the rear side of the first wind turbine, is integrally rotatably attached to the second rotating shaft means, and rotates by receiving a natural wind force; A first wind turbine power transmission means interposed between the first rotating shaft means and the generator by providing a clutch means for cutting off power transmission, and a clutch means for cutting off power transmission. A second wind turbine power transmission means provided in the middle and interposed between the second rotating shaft means and the generator is provided, and each of the clutch means corresponds to rotation of the corresponding generator. It is configured as a one-way clutch to which the clutch is connected when the wind turbine tries to rotate faster. With this configuration, when the first wind turbine and the second wind turbine both receive wind and rotate, the second wind turbine on the rear side is caused by the rotation of the first wind turbine on the front side in addition to the wind coming from the front. It will also receive and rotate, and the wind turbine will rotate efficiently. Further, when the wind speed weakens and the rotation speed of the wind turbine decreases, power transmission between the first and second wind turbines and the generator is cut off, and only the generator side can be rotated for a long time in a state where the rotation load is small. . Among them, when the wind speed increases and the rotation speed of the wind turbine increases, the clutch on the power transmission means side corresponding to the wind turbine on the speed increasing side is locked, and the wind turbine and the generator are increased between the speed increasing speed. Power transmission is re-established to accelerate the generator and also to apply a strong torque to rotate it. That is, a two-axis type wind turbine generator capable of efficiently driving a generator can be obtained.

Further, a wind power generator according to a seventh aspect of the present invention is the wind power generator according to the sixth aspect, wherein the generator is provided as a generator connected to the power transmission means for the first wind turbine. The first wind turbine generator and the second wind turbine generator connected to the second wind turbine power transmission means are provided. With this configuration, it is possible to control, for each wind turbine, the drive of the generator corresponding to the wind turbine.

Further, in the wind power generator according to claim 8 of the present invention, the generator, the first rotating shaft means, and the first rotating shaft means are arranged concentrically with their centers substantially aligned with each other. A second rotating shaft means and a first rotating shaft means which are integrally rotatably attached to the first rotating shaft means and rotate by receiving natural wind force.
The first windmill overlaps the first windmill and the first windmill.
A second wind turbine that is integrally rotatably attached to the second rotating shaft means in a state of being provided on the rear side of the wind turbine and that rotates by receiving natural wind force, the first rotating shaft means, and the generator. A first wind turbine power transmission means interposed between the first wind turbine power transmission means and a second wind turbine power transmission means disposed between the second rotation shaft means and the generator.
A wind turbine power transmission means, and is arranged between the first rotation shaft means and the second rotation shaft means,
One-way clutch means to which a clutch is connected when the second rotating shaft means tries to rotate faster than the rotation of the first rotating shaft means. With this configuration, when the first wind turbine and the second wind turbine both receive wind and rotate, the second wind turbine on the rear side is caused by the rotation of the first wind turbine on the front side in addition to the wind coming from the front. It will also receive and rotate, and the wind turbine will rotate efficiently. When the wind speed weakens and the rotation speed of the wind turbine decreases, the one-way clutch means cuts off power transmission between the first and second wind turbines and the generator.
Only the generator side can be rotated for a long time with a small rotation load. Among them, when the wind speed increases and the rotation speed of the wind turbine increases, the clutch on the power transmission means side corresponding to the wind turbine on the speed increasing side is locked, and the wind turbine and the generator are increased between the speed increasing speed. Power transmission is re-established to accelerate the generator and also to apply a strong torque to rotate it. That is, a two-axis type wind turbine generator capable of efficiently driving a generator can be obtained.

According to a ninth aspect of the present invention, there is provided a wind turbine generator, wherein the generator, the first rotating shaft means, and the first rotating shaft means are arranged such that their centers are substantially aligned with each other. Two rotary shaft means, and a first wind turbine that is integrally rotatably attached to the first rotary shaft means and that rotates by receiving natural wind force;
A second wind turbine which is overlapped with the first wind turbine and is provided on the rear side of the first wind turbine, is integrally rotatably attached to the second rotating shaft means, and rotates by receiving a natural wind force; A power transmission unit interposed between the second rotating shaft unit and the generator, and arranged between the first rotating shaft unit and the second rotating shaft unit, The one-way clutch means is connected to the clutch when the second rotary shaft means rotates faster than the first rotary shaft means rotates. With this configuration, when the first wind turbine and the second wind turbine both receive wind and rotate, the second wind turbine on the rear side is caused by the rotation of the first wind turbine on the front side in addition to the wind coming from the front. It will also receive and rotate, and the wind turbine will rotate efficiently. Further, when the wind speed is weakened and the rotation speed of the wind turbine is reduced, the power transmission between the first and second wind turbines and the generator is cut off by the one-way clutch means, and only the generator side is rotated for a long time in a state where the rotation load is small. Can be made. Among them, when the wind speed increases and the rotation speed of the wind turbine increases, the clutch on the power transmission means side corresponding to the wind turbine on the speed increasing side is locked, and the wind turbine and the generator are increased between the speed increasing speed. Power transmission is re-established to accelerate the generator and also to apply a strong torque to rotate it. That is, it is possible to obtain a single-axis wind turbine generator that can efficiently drive the generator.

According to a tenth aspect of the present invention, there is provided a wind power generator, wherein the generator, the first rotating shaft means, and the first rotating shaft means are arranged such that their centers are substantially aligned with each other. A second wind turbine, which is integrally rotatably attached to the second rotary shaft means and the first rotary shaft means and rotates by receiving a natural wind force; and a first wind turbine that overlaps with the first wind turbine and is located behind the first wind turbine. Between the second wind turbine, which is installed on the second rotary shaft means so as to rotate integrally with the second rotary shaft means, and which rotates by receiving natural wind force, and the first rotary shaft means and the generator. Is disposed between the power transmission means interposed between the first rotation shaft means and the second rotation shaft means, and the second rotation shaft is rotated more than the rotation of the first rotation shaft means. One-way clutch means in which the clutch is engaged when the means tries to rotate faster It is obtained by a structure comprising a.
With this configuration, when the first wind turbine and the second wind turbine both receive wind and rotate, the second wind turbine on the rear side is caused by the rotation of the first wind turbine on the front side in addition to the wind coming from the front. It will also receive and rotate, and the wind turbine will rotate efficiently. Further, when the wind speed weakens and the rotation speed of the wind turbine decreases, the one-way clutch means causes the first
Also, the power transmission between the second wind turbine and the generator can be cut off, and only the generator side can be rotated for a long period of time with a small rotational load. Among them, when the wind speed increases and the rotation speed of the wind turbine increases, the clutch on the power transmission means side corresponding to the wind turbine on the speed increasing side is locked, and the wind turbine and the generator are increased between the speed increasing speed. Power transmission is re-established to accelerate the generator and also to apply a strong torque to rotate it. That is, it is possible to obtain a single-axis wind turbine generator that can efficiently drive the generator.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a wind turbine generator of the present invention will be described below with reference to the drawings. Figure 5
Is a schematic configuration diagram of a wind turbine generator according to the present invention,
This portion is a wind turbine generator portion corresponding to the mounting body b described in FIG. The wind turbine generator of the present invention has the first wind turbine 1 and the first pulley 2, and the second wind turbine 3 and the second pulley 4 on the same central axis. A power transmission unit 7 having driven pulleys 5 and 6 respectively corresponding to the first pulley 2 and the second pulley 4 is provided, and the first pulley 2 and the driven pulley 5 and the second pulley 4 and the driven pulley 6 are provided. Are operatively connected to each other by endless belts 8 and 9 so that power can be transmitted. Further, the output side of the power transmission unit 7 is connected to a gear box 10 for converting the rotation ratio and a generator 11 that is rotationally driven by receiving the converted power. A one-way clutch, which will be described later, is provided between the first wind turbine 1 and the first pulley 2, and / or the second wind turbine 3 and the second pulley 4, and the first wind turbine 1 is switched by switching the one-way clutch. And the 2nd windmill 3 can rotate integrally, or can rotate independently. Further, normally, the first wind turbine 1 and the second wind turbine 3 are designed to rotate integrally, and when they are rotated, the rotation thereof is the first and second pulleys 2 and 4, the endless belts 8 and 9, and the driven pulleys. The power is transmitted to the power transmission unit 7 via the power transmission units 5 and 6, and further from the power transmission unit 7 via the gearbox 10 to the generator 1.
1 can be rotated to generate power.

Next, the detailed structure in the peripheral portion of the wind turbine of the wind power generator will be described for each embodiment. In this specification, in order to simplify the description, in each of the embodiments, a part of the wind turbine generator which is not shown in the drawing will be described below as having the same configuration as that of FIG. The corresponding members will be described with the same reference numerals.

(Embodiment 1) FIGS. 1 to 3 show a wind turbine generator according to a first embodiment of the present invention. This wind turbine generator is a two-axis wind turbine generator. In this specification, the two-axis system means that two wind turbines (first wind turbine 1 and second wind turbine 3) rotate independently and each has an independent power transmission system. A system that can drive separate generators. However, each windmill 1 and 3 may drive the same one generator (example of Drawing 5).

The wind turbine generator according to the first embodiment of the present invention has two wind turbines (the tandem structure of the first wind turbine 1 and the second wind turbine 3) whose centers are substantially coincident with each other, that is, they are coaxial and overlap each other in the front-rear direction. Have). Each of these wind turbines 1 and 3 has three blades 12a, 12b connected to the rotating shaft portion at an equal angular interval of 120 degrees when viewed from the front.
It has each. Also, the blade 1 of the first wind turbine 1
The length of 2a is set to be somewhat shorter (several% to 10%) than the length of the blade 12b of the second wind turbine 3.

More specifically, the first wind turbine 1 has a hub 13
It is connected to the rotary shaft 14 via a. An output shaft member 15 is integrally rotatably attached to the rearmost portion of the rotary shaft 14, and the first pulley 2 is disposed on the output shaft member 15. Between the output shaft member 15 and the first pulley 2,
One-way clutch 16a that also functions as a bearing
Is installed. A first disc brake 17a is attached to the first pulley 2. The first disc brake 17a is for giving a braking action when the first wind turbine 1 tries to rotate in the reverse direction due to the wind direction. That is, the wind turbine (both first and second) is configured to stop in either direction of rotation as normal rotation and reverse as the reverse direction.

Next, the second wind turbine 3 is attached to the hub 13b, and the flange 1 is attached to the hub 13b.
The sleeve members 20 joined by 8 and 19 are connected. The hub 13b and the sleeve member 20 have through holes each having a diameter larger than that of the rotating shaft 14 at the centers thereof. Then, the rotary shaft 14 is disposed in the through hole, and the bearings 21 are respectively interposed between the hub 13b and the sleeve member 20 and the rotary shaft 14, so that the hub 13
b and the sleeve member 20 are connected to the rotary shaft 14. That is, by interposing the bearing 21, the hub 13b, the sleeve member 20, and the rotary shaft 14 can rotate independently of each other. Sleeve member 20
A ring member 25 is provided at the rearmost portion of the above, and the second pulley 4 is arranged on the ring member 25. A one-way clutch 16b, which also functions as a bearing, is interposed between the ring member 25 and the second pulley 4.
A second disc brake 17b is attached to the flange 19 of the sleeve member 20. The second disc brake 17b is the first disc brake 17a.
Similarly, when the second wind turbine 3 tries to rotate in the reverse direction due to the wind direction, it has a function of giving a braking action.

The one-way clutch 16a attached to the side of the first wind turbine 1 and the one-way clutch 16b attached to the side of the first wind turbine 2 are attached at positions where the one-way clutch 16a and the output shaft member 15 are the first. With respect to the pulley 2, the one-way clutch 16b has the same structure except for the difference between the ring member 25 and the second pulley 4. The structures of the one-way clutches 16a and 16b are shown in FIGS. FIG. 2 is a cross-sectional view of the one-way clutches 16a and 16b cut at a right angle to the shaft center, and FIG. 3 is a cross-sectional view of the one-way clutches 16a and 16b horizontally cut along the shaft center. FIG. 2 and 3, the one-way clutches 16a and 16b include an outer shaft 26 having a cylindrical cross-section, a center shaft 27 having a cylindrical cross-section disposed inside the outer shaft 26, and the outer shaft 26. 2 interposed between the center shaft 27 and the center shaft 27
8 and 29 and a biasing spring 30. Outer shaft 26
A key groove 26a is formed on the outer circumference of the key groove 26a so as to extend continuously in the direction along the center axis (the same direction).
The outer shaft 26 and the first pulley 2 and the second pulley 4 rotate integrally by coupling the keys 31 formed on the respective pulleys 2 and 4 and the key groove 26a of the outer shaft 26.
The center shaft 27 has a substantially circular basic cross-sectional structure, is provided with a plurality of serrated claw portions 27a on the outer circumference at equal intervals in the circumferential direction, and continuously extends in the inner circumference in a direction along the axis center. The key groove 27b is formed. The claw portion 27a is
A step portion 33 formed by cutting out at a substantially right angle toward the inner side in the radial direction of the center shaft 27, and a slope 34 that continuously descends from the top of the step portion 33 toward the valley of the adjacent step portion 33.
And are formed. The biasing spring 30 is a coil spring, one end side of which is attached to the claw portion 27 a, and the other end side of which is arranged on the slope 34 so as to project toward the top of the slope 34. Laura 28
And 29 are arranged on the inclined surface 34 along the axial center of the center shaft 27, and the biasing spring 30
Is pushed up toward the top of the slope 34, and is held in a state of being loosely sandwiched between the slope 34 and the outer shaft 26.

FIG. 4 shows one-way clutches 16a and 16b.
FIG. 7 is an operation explanatory diagram of The operation of the one-way clutches 16a and 16b will be described below with reference to FIG. Now, assuming that the outer shaft 26 is on the driving side and the center shaft 27 is on the driven side, when the outer shaft 26 rotates in the direction of arrow S1 in FIG.
And 29 are attracted by the friction between the outer shaft 26 and the arrow S1.
And moves into the narrow gap between the slope 34 and the outer shaft 26. Further, in the bite state, the one-way clutches 16a and 16b are locked and the outer shaft 26
And the center shaft 27 integrally rotate in the direction of arrow S1. .. (a) of FIG. 4 shows this locked state. On the contrary, when the outer shaft 26 reversely rotates in the direction of arrow S2 in FIG. 2, in the state immediately before the outer shaft 26 reversely rotates,
Rollers 28 and 29 are digged between the outer shaft 26 and the slope 34. However, when the rotation of the outer shaft 26 is started, the rollers 28 and 29 move in the direction of the arrow S2 due to the friction between the rollers 28 and 29, and as shown in (b) of FIG. It is pushed into a wide gap with the outer shaft 26, and the power connection between the rollers 28 and 29 and the outer shaft 26 is broken. That is, the locks of the one-way clutches 16a and 16b are released, and the outer shaft 26 and the center shaft 27 are disengaged from each other to perform idling operation. Next, when the center shaft 27 is on the drive side and the outer shaft 26 is on the driven side,
When rotating in the direction of the arrow S3, the rollers 28 and 29 move in the direction of the arrow S3 due to the friction between the rollers 28 and 29 and the center shaft 27 (slope 34), and bite into the narrow gap between the slope 34 and the outer shaft 26. Go. Also, when it comes to bite,
The one-way clutch is locked, and the outer shaft 26 and the center shaft 27 integrally rotate in the direction of arrow S3.
FIG. 4C shows this locked state. On the contrary, when the center shaft 27 reversely rotates in the direction of the arrow S4 in FIG. 2, the rollers 28 and 29 bite between the outer shaft 26 and the slope 34 in the state immediately before the center shaft 27 reversely rotates. Has been. However, when the rotation of the center shaft 27 is started, the rollers 28 and 29 move in the direction of the arrow S4 due to the friction between the rollers 28 and 29 and the slope 34, and as shown in FIG. Is pushed into a wide gap between the slope 34 and the outer shaft 26, and the rollers 28 and 29 and the slope 3
The power connection with 4 is broken. That is, the locks of the one-way clutches 16a and 16b are released, and the outer shaft 26 and the center shaft 27 are disengaged from each other to perform idling operation.

Next, the operation of the wind turbine generator according to the first embodiment configured as described above will be described.
Consider now that the wind is blowing from the right side of the paper surface of FIG. As a basic operation, each first windmill 1
And the 2nd windmill 3 receives a wind and rotates normally. The rotation of the first wind turbine 1 is transmitted to the first pulley 2 via the hub 13a, the rotating shaft 14, the output member 15, and the one-way clutch 16a, and is transmitted from the first pulley 2 to the driven pulley 5 via the endless belt 8. Drive the generator 11. The rotation of the second wind turbine 3 is transmitted to the second pulley 4 via the hub 13b, the sleeve member 20, the ring member 25, and the one-way clutch 16b, and is transmitted from the second pulley 4 to the driven pulley 6 via the endless belt 9. , Drive the generator 11. In this case, regarding the one-way clutches 16a and 16b, both the rotary shaft 14 and the sleeve member 20 which are drive side members rotate integrally with the center shaft 27 in FIG. The center shaft 27 that is integral with is the drive side. On the other hand,
In the one-way clutches 16a and 16b, both the first pulley 2 and the second pulley 4, which are driven side members, rotate integrally with the outer shaft 26 shown in FIG. 2, so that they are integrated with the first pulley 2 and the second pulley 4. The outer shaft 26 is the driven side. The rotating shaft 14 and the sleeve member 20 rotate in the arrow S3 direction in FIG. 2 to drive the generator 11 due to the drive-driven relationship. Also, the rotating first windmill 1
Also, the second wind turbine 3 rotates more strongly according to the wind speed if the wind speed is high, and generates a large torque.

After that, the operation phenomenon when the wind speed becomes weak (including when it stops) will be described. When the wind speed weakens, the supply of the force of the center shaft 27 in the direction of arrow S3 in FIG. 2 is stopped in the one-way clutches 16a and 16b, but the wind turbines 1 and 3 continue to rotate due to inertial force for a while. Among them, the first wind turbine 1 and the second wind turbine 3 start decelerating because the torque braking by the blades 12a and 12b is large. As a result, the outer shaft 26 on the driven side
Becomes relatively faster than the center shaft 27, and the one-way clutches 16a and 16b are unlocked. As a result, the resistances of the wind turbines 1 and 3 are not transmitted to the generator 11, and the generator 11 can continue to rotate for a longer time than in the conventional case. When the wind speed increases, the first wind turbine 1 and the second wind turbine 3 start to rotate again, and the generator 11, which is slightly decelerating, is accelerated again and a strong torque is applied.

Next, the interaction between the first wind turbine 1 and the second wind turbine 3 when the first wind turbine 1 and the second wind turbine 3 are rotating will be described. Both wind turbines 1 and 3 are rotated by receiving wind, but the second wind turbine 3 receives not only the wind coming from the front but also the wind caused by the rotation of the first wind turbine 1. In particular, the blade 12a of the first wind turbine 1 (one blade is 4
The tip (about 0 m) rotates at a large peripheral speed, and the wind forcedly sent backward from this portion has a large wind speed. Here, the blade 12a of the first wind turbine 1
Is set to be slightly shorter than the length of the blades 12a of the second wind turbine 3, the second wind turbine will add the first wind in addition to the natural wind.
The strong wind pushed backward from the tip of the blade 12a of the wind turbine 1 is also received. As a result, the second wind turbine 3 generates a stronger torque. Further, as the first windmill 1 rotates, the turbulent wind that has flowed toward the first windmill 1 is rectified by the first windmill 1. The rectified wind that is closer to the laminar flow passes through the first windmill 1 and hits the second windmill 3, so that the second windmill 3 receives better wind conditions than the first windmill 1. In this respect as well, the second wind turbine 3 rotates more strongly than the first wind turbine 3 and generates a large torque.

Therefore, in the wind turbine generator according to the first embodiment having such a configuration, the one-way clutches 16a and 16b separate the first wind turbine 1 and the second wind turbine 3 from the generator 11, and By the interaction of the wind turbines 1 and 3, the load that tries to prevent the rotation of the generator 11 is suppressed, and the energy can be efficiently extracted even if only a weak wind is blowing. For example, in the conventional wind power generator, the generator 11 does not operate effectively unless the wind speed reaches about 5 m / s. However, in the first embodiment, the generator 11 operates effectively from the wind speed of about 3 m / s. To do. Moreover, it is possible to keep the operation duration time of the generator 11 long for the wind speed decrease.

In the case of the first embodiment, the relationship between the wind speed and the torque generated by the wind turbine has the characteristic shown in FIG. 5 (b). That is, in the characteristic diagram in FIG. 5B, when the wind speed gradually increases from 0, the rotations of the wind turbine 1 and the wind turbine 3 increase, and the torque also increases. Although this point is the same as the conventional example,
The increase rate (increasing rate) of the torque is larger than that of the conventional example.
Then, the wind speed has already reached the rated torque of the wind turbine generator at around 8 m / s.

In the structure of the first embodiment, the structure in which the wind turbines 1 and 3 drive the different generators 11 in the two-axis system is disclosed. For example, as shown in FIG. A generator 11 common to the wind turbines 1 and 3 may be prepared so that each wind turbine 1 and 3 drives the same generator 11.

(Second Embodiment) Next, a wind turbine generator according to a second embodiment of the present invention will be described with reference to FIG. The wind turbine generator according to the second embodiment is also similar to the wind turbine generator according to the first embodiment.
It is a 2-axis wind power generator. In addition, in FIG. 7, members corresponding to those of the wind turbine generator according to the first embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals, and redundant description will be omitted. In the wind turbine generator shown in FIG. 7, the rotary shaft 14 coupled to the first wind turbine 1 has a key 35 a fixed to the rotary shaft 14 and a key groove 35 b provided in the first pulley 2 to couple the first rotary shaft 14 to the first rotary shaft 14. It is directly connected to the pulley 2. In addition, the sleeve member 20 coupled to the second wind turbine 3
Is directly connected to the second pulley 4 by being connected to the key 36a and the key groove 36b fixed to the sleeve member 20. Further, one-way clutches 16 are provided between the rotary shaft 14 of the first wind turbine 1 and the hub 13b of the second wind turbine 3, respectively. This one-way clutch 16 has a first
The one-way clutch described in the embodiment of (16
It has the same structure as that of a, 16b). Then, in the wind turbine generator according to the second embodiment, the key 32 and the key groove 27 are provided between the rotary shaft 14 and the center shaft 27.
key 31 between the outer shaft 26 and the hub 13b.
And the keyway 27b.

Next, the operation of the wind turbine generator according to the second embodiment having the above structure will be described. First, regarding the basic operation, when considering that the wind is blowing from the right side of the paper surface of FIG. 7, the first windmill 1 and the hub 13b directly connected to the rotary shaft 14 via the hub 13a.
The 2nd windmill 3 rotatably attached to the rotating shaft 14 via each receives a wind, and rotates normally. During the normal rotation, the rotation of the first wind turbine 1 is caused by the hub 13a and the rotating shaft 1.
4, the first pulley 2 through the key 35a and the key groove 35b
Be transmitted to. Further, it is transmitted from the first pulley 2 to the driven pulley 5 via the endless belt 8 to drive the generator 11. The rotation of the second wind turbine 3 is transmitted to the second pulley 4 via the hub 13b, the sleeve member 20, the key 36a and the key groove 36b, and is transmitted from the second pulley 4 to the driven pulley 6 via the endless belt 9. The generator 11 is driven. As the generator 11 here, two generators, a generator for the first wind turbine and a generator for the second wind turbine, are prepared.
The wind turbine 1 and the second wind turbine 3 may drive different generators, or one generator may be prepared and one generator may be used for both the first wind turbine 1 and the second wind turbine 3. It may be driven.

Further, in the structure of the second embodiment,
Looking at the one-way clutch 16, the basic operation is that when the first wind turbine 1 and the second wind turbine 3 rotate in the forward direction,
The one-way clutch 16 is in the locked state, the rotary shaft 14 and the hub 13b rotate integrally, and the first wind turbine 1 and the second wind turbine 3 each transmit power to the generator 11 in the form of a direct connection structure. The rotating first and second windmills 1 and 3 rotate more strongly according to the wind speed if the wind speed is higher, and generate a larger torque. Between the first wind turbine 1 and the second wind turbine 2, the operation in which the second wind turbine 3 rotates faster than the first wind turbine 1 is repeated in some cases. That is, when the wind speed becomes weak, the center shaft 27 in the one-way clutch 16 is reduced.
Supply of power to the first windmill 1 and the second windmill 3 is stopped.
Both of them continue to rotate due to inertial force for a while. Among them, the first wind turbine 1 and the second wind turbine 3 start decelerating because the torque braking by the blades 12a and 12b is large. As a result, the outer shaft 26 rotates relatively quickly, and the one-way clutch 1
The lock of 6 is released. As a result, the resistance (load element) of the second wind turbine 3 is not transmitted to the generator 11, and only the first wind turbine 1 is connected to the generator 11 to reduce the resistance for a long time. Can be rotated.
When the wind speed increases, the first wind turbine 1 and the second wind turbine 3 start to rotate again, and the generator 11 is slightly decelerating.
Accelerate again and give strong torque.

Therefore, in the wind turbine generator according to the second embodiment having such a configuration, the one-way clutch 16 separates the second wind turbine 3 from the generator 11 and the interaction between the wind turbines 1 and 3. By the generator 11
The load that tries to hinder the rotation of is suppressed, and even if a weak wind is blowing, the energy can be efficiently extracted.

(Third Embodiment) Next, a wind turbine generator according to a third embodiment of the present invention will be described with reference to FIG. The wind turbine generator according to the third embodiment is a uniaxial wind turbine generator. In this specification, the output of two wind turbines is input to one power transmission system and is transmitted to one driving side pulley 3 and a driven side pulley to form one generator. It refers to the method of driving. Further, in FIG. 8, members corresponding to those of the wind turbine generators according to the first and second embodiments shown in FIGS. 1 to 7 are designated by the same reference numerals, and duplicated description will be omitted. In the wind turbine generator in FIG. 7, a one-way clutch 16 a is provided between the rotary shaft 14 of the first wind turbine 1 and the sleeve member 20 of the second wind turbine 3, and the one-way clutch 16 a is provided between the sleeve member 20 of the second wind turbine 3 and the pulley 37. Is provided with a one-way clutch 16b. One-way clutch 1
6a, the center shaft 27 on the driving side is integrally rotatably coupled to the rotary shaft 14 by the key 32 and the key groove 27b, and the outer shaft 26 on the driven side is the key 32 and the key groove 27b.
Is integrally rotatably coupled to the hub 13b. In the one-way clutch 16b, the center shaft 27 on the drive side is integrally rotatably coupled to the hub 13b by the key 32 and the key groove 27b, and the outer shaft 26 on the driven side is integrated with the pulley 37 by the key 32 and the key groove 27b. It is rotatably connected.

Next, the operation of the wind turbine generator according to the third embodiment having the above structure will be described. First, as a basic operation, assuming that wind is blowing from the right side of the paper surface of FIG. 8, the first windmill 1 and the hub 13b directly connected to the rotating shaft 14 via the hub 13a.
The second wind turbine 3 rotatably attached to the pulley 37 through the wind receives the wind and rotates forward. During the normal rotation, the rotation of the first wind turbine 1 is caused by the hub 13a and the rotating shaft 1.
4, transmitted to the pulley 37 via the one-way clutch 16a, the hub 13b, and the second one-way clutch 16b, and transmitted from the pulley 37 to the driven pulley 38 via the endless belt 8 to drive the generator 11. The rotation of the second wind turbine 3 is performed by the hub 13b and the second one-way clutch 1
6b to be transmitted to the pulley 37, and from the pulley 37 to the driven pulley 38 via the endless belt 8 to drive the generator 11. That is, normally, the first windmill 1
And the 2nd windmill 3 is integrally rotated, and power is transmitted to the generator 11 in the form of a direct connection structure, respectively.

After that, if the wind speed weakens,
Both the first windmill 1 and the second windmill 3 continue to rotate due to inertial force for a while. Among them, the first wind turbine 1 and the second wind turbine 3 start decelerating because the torque braking by the blades 12a and 12b is large. On the other hand, since the generator 11 tries to continue rotating due to inertia, a load is generated between the generator 11 and the wind turbines 1 and 3, and the one-way clutch 16b is unlocked.
As a result, the generator 11 continues to rotate with a light load. Further, on the side of the wind turbines 1 and 3, a load is generated between the wind turbines 1 and 3, and the one-way clutch 16a is unlocked. As a result, the wind turbine 3 continues to rotate with a small load. That is, the one-way clutch 16
The locks a and 16b are the one-way clutches 16b and 1b.
It is canceled in the order of 6a. As a result, the resistances of the first wind turbine 1 and the second wind turbine 3 are not transmitted to the generator 11, and the generator 11 can continue to rotate for a longer time than in the conventional case. When the wind speed increases, the one-way clutches 16a and 16b are locked in this order, the first wind turbine 1 and the second wind turbine 3 start rotating again, and the one-way clutch 16
a and 16b are removed, and the generator 11, which is slightly decelerating, is accelerated again and a strong torque is applied.

Therefore, in the wind turbine generator according to the third embodiment configured as described above, the first wind turbine 1 and the second wind turbine 3 are disconnected from the generator 11 by the one-way clutches 16a and 16b, and By the interaction of the wind turbines 1 and 3, the load that tries to hinder the rotation of the generator 11 is suppressed, and the energy can be efficiently extracted even if only a weak wind is blowing.

(Fourth Embodiment) Next, a wind turbine generator according to a fourth embodiment of the present invention will be described with reference to FIG. The wind turbine generator according to the fourth embodiment is also a uniaxial wind turbine generator. In addition, FIG.
In FIG. 1, members corresponding to those of the wind turbine generators according to the first to third embodiments shown in FIGS. 1 to 8 are designated by the same reference numerals, and duplicated description will be omitted. In the wind turbine generator in FIG. 9, a key 39a attached to the rotary shaft 14 and a key groove 39b provided in the hub 13a are provided at the front end of the rotary shaft 14.
The first windmill 1 is attached so as to be able to rotate integrally by coupling with
The pulley 37 is integrally rotatably attached to the rear end by coupling the key 40a attached to the rotating shaft 14 and the key groove 40b provided in the pulley 37. Also, the rotating shaft 1
A one-way clutch 16 is provided between the No. 4 and the hub 13b. In the one-way clutch 16, the center shaft 27 on the drive side has a key 32 and a key groove 27 on the rotary shaft 14.
The outer shaft 26 that is integrally rotatably connected by b
Are integrally rotatably coupled to the hub 13b by the key 32 and the key groove 27b.

Next, the operation of the wind turbine generator according to the fourth embodiment having the above structure will be described. First, as a basic operation, considering a case where wind is blowing from the right side of the paper surface of FIG. 9, the first wind turbine 1 and the one-way clutch 16 and the hub 13b directly connected to the rotating shaft 14 via the hub 13a are considered. Each of the second wind turbines 3 attached via the wind receives the wind and integrally rotates in the forward direction. During the normal rotation, the rotations of the first wind turbine 1 and the second wind turbine 3 are transmitted to the pulley 37 via the rotary shaft 14 and from the pulley 37 to the driven pulley 38 via the endless belt 8 to drive the generator 11. To drive. The rotation of the second wind turbine 3 is transmitted to the pulley 37 via the hub 13b and the one-way clutch 16, and is transmitted from the pulley 37 to the driven pulley 38 via the endless belt 8 to drive the generator 11. That is, normally, the first wind turbine 1 and the second wind turbine 3 have the rotating shaft 1
4 and the pulley 37 are integrally rotated to transmit power to the generator 11 in the form of a direct connection structure.

After that, if the wind speed weakens,
Both the first windmill 1 and the second windmill 3 continue to rotate due to inertial force for a while. Among them, the first wind turbine 1 and the second wind turbine 3 start decelerating because the torque braking by the blades 12a and 12b is large. As a result, the center shaft 27 of the one-way clutch 16 rotates relatively quickly, and the one-way clutch 16 is unlocked. As a result, the second wind turbine 3 is separated from the rotating shaft 14, the resistance (load) of the second wind turbine 3 is not transmitted to the generator 11 side, and the generator 11 with the reduced load is longer than the conventional one. You can continue spinning for hours. When the wind speed increases, the second wind turbine 2 is rapidly rotated, and the outer shaft 2
6 is rotated faster with respect to the center shaft 27, the one-way clutch 16 is locked, and the first wind turbine 1 and the second wind turbine 3
Starts to rotate together again. As a result, the one-way clutch 16 is disengaged and the generator 11, which has been slightly decelerated, is accelerated again and a strong torque is applied.

Therefore, the fourth book constructed as described above is used.
In the wind turbine generator according to the embodiment of the present invention, even if only a weak wind is blowing, the energy of the second wind turbine 3 and the generator 11 is separated by the one-way clutch 16 and the energy of the wind turbine 1 and the generator 11 is reduced. Will be able to be efficiently extracted.

(Embodiment 5) FIGS. 10 to 14 show a wind turbine generator according to a fifth embodiment of the present invention. Of these drawings, FIG. 10 is a vertical sectional side view of a wind turbine generator according to a fifth embodiment of the present invention, and FIG.
Sectional view of the lock bearing according to the embodiment of the present invention cut in a direction perpendicular to the central axis thereof, and FIG.
FIG. 13 is a cross-sectional view showing the lock bearing according to the embodiment of the present invention cut along the central axis thereof, and FIG. 13 shows the operation of the lock bearing according to the fifth embodiment in relation to the rotational angle position of the blade of the wind turbine. It is a figure explaining.

This wind power generator has basically the same structure as the wind power generator according to the first embodiment shown in FIGS. 1 to 3. However, the difference from the wind turbine generator according to the first embodiment is that, as shown in FIG. 10, a hub 13a for mounting and supporting the first wind turbine 1 and a hub 13b for mounting and supporting the second wind turbine 3 are provided. A lock bearing 50 is interposed therebetween, and the first wind turbine 1 and the second wind turbine 3 are configured to rotate while having a predetermined angular relationship with each other.

The structure of the lock bearing 50 is shown in FIGS. 11 and 12. FIG. 11 is a sectional view taken by cutting the lock bearing 50 in a state of intersecting the axis center at right angles, and FIG. 3 is a sectional view taken by cutting the lock bearing 50 horizontally along the axis center. is there. In these drawings, the lock bearing 50 is an outer shaft 5 having a cylindrical structure.
1, a center shaft 52 having the same cylindrical structure and arranged inside the tubular body of the outer shaft 51 with a predetermined gap, and a roller 5 interposed between the outer shaft 51 and the center shaft 52.
It is composed of three. A plurality of outer peripheral engagement teeth 54 are formed on the outer periphery of the outer shaft 51 so as to continuously extend in the direction along the center axis (the same direction). The outer peripheral engagement teeth 54 are provided at equal pitch intervals along the outer periphery of the outer shaft 51, and as a result, the outer shaft 51 has a structure as a spline shaft. Further, on the inner circumference of the outer shaft 51, there are provided a plurality of lock ridges 55 extending in the direction along the central axis of the outer shaft 51 and projecting radially inward from the inner circumferential surface of the outer shaft 51.

The center shaft 52 has a circular basic sectional structure, and a plurality of bearing receivers 56 are formed in a concave shape on the outer periphery of the center shaft 52 at equal pitch intervals in the circumferential direction.
A plurality of inner peripheral keyways 57 are formed on the inner periphery so as to extend continuously in the direction along the center axis of the center shaft 52. The inner peripheral key grooves 57 are provided at equal pitch intervals along the inner periphery of the center shaft 52. The roller 53 is installed in the bearing receiver 56 of the center shaft 52 in the space between the outer shaft 51 and the center shaft 52.
In the fifth embodiment, six lock ridges 55 are provided on the inner peripheral surface of the outer shaft 51 at equal intervals, and the bearing receiver 56 and the roller 53 are also arranged on the inner peripheral surface of the outer shaft 51 and the center. Six pieces are provided at equal intervals along the outer peripheral surface of the shaft 52. The space between the outer shaft 51 and the center shaft 52 may be left as it is, or a sealing material such as lubricating oil may be filled.

Since the lock bearing 50 has the above-described structure, between the outer shaft 51 and the center shaft 52, in some cases, both members independently rotate without interfering with each other ( There is a play motion) and a case where one of them performs a rotational motion while being driven by giving a power to the other by the lock action (integral motion).

The attachment of the lock bearing 50 to the wind turbine generator as shown in FIG. 10 will now be described. The outer shaft 51 of the lock bearing 50 is mounted inside the cylinder of the hub 13b that mounts and supports the second wind turbine 3. Therefore, a plurality of rows of key grooves corresponding to the outer peripheral engaging teeth 54 provided on the outer shaft 51 are provided inside the cylinder of the hub 13b, and these key grooves and the outer peripheral engaging teeth 54 mesh with each other to be integrally coupled. .
On the other hand, the center shaft 52 of the lock bearing 50 is attached to the outside of the cylinder of the hub 13a for attaching and supporting the first wind turbine 1. Therefore, a plurality of rows of engaging teeth corresponding to the inner peripheral key groove 57 provided on the center shaft 52 are provided outside the cylinder of the hub 13a to form a spline shaft structure, which engages with the inner peripheral key groove 27. It is integrally connected by meshing with teeth. With such a mounting structure, the first wind turbine 1 and the second wind turbine 3 rotate independently in the same direction without interfering with each other through the lock bearing 51 (play motion). Also, one of them may rotate in the same direction while driving by giving power to the other (integral movement).

Further, in the present embodiment, in connection with the mounting of the lock bearing 50, the first and second lock bearings are attached.
It also defines the mounting angular positions of the blades 12a, 12b of the wind turbines 1, 3. FIG. 13 defines the mounting angle positions of the blades 12a, 12b of the first and second wind turbines 1, 3 and the first wind turbine 1 during rotation of the wind turbines thereby.
It is a figure explaining the relative positional information relationship between the blade 12a of the above, and the blade 12b of the 2nd windmill 3. In addition, in FIG.
In the figure, the blades 12a and 12b are drawn in a relatively large scale, and the lock bearing 50 is drawn in a relatively enlarged manner. This is because the angular position of each part of the lock bearing 50 and the blades 12a, 12 during the rotating operation.
This is because the relationship between b and the angular position is represented in an easy-to-understand manner.

In FIG. 13, the three blades shown by the solid lines are blades 12a of the first wind turbine, and the three blades shown by the dotted lines are blades 12b of the second wind turbine. As is clear from the configuration of the wind turbine generator shown in FIG. 10, the blade 12a is directly connected to the center shaft 52, and the blade 1
2b is directly connected to the outer shaft 51.

In such a structure, the lock bearing 5
The operation of 0 will be described below. Now, assuming that the outer shaft 51 is on the drive side and the center shaft 52 is on the driven side, the normal first wind turbine 1 and the second wind turbine 3 rotate slowly and independently (at approximately the same rotation speed). When the lock bearing 51 is interposed, the first wind turbine 1 and the second wind turbine 3 independently rotate in the same direction without interfering with each other. It is assumed that the rotation direction is the direction of arrow S5 in FIG. At this time, the lock bearing 50 is not particularly locked and both the outer shaft 51 and the center shaft 52 make idle motion at a predetermined substantially same rotational speed. This state is shown in Figure 1.
2 and the state shown in FIG.

Next, generally speaking, in the wind turbine generator in which the first wind turbine 1 and the second wind turbine 3 are arranged side by side in a tandem type as in the present invention, as described above, the second wind turbine 3 is used. Receives better wind conditions. Therefore, from the state where the first wind turbine 1 and the second wind turbine 3 are rotating at approximately the same rotational speed, the second wind turbine 3 is rotated at a relatively slightly higher rotational speed. This is a lock bearing 5
Zero means that the outer shaft 51 rotates faster than the center shaft 52. Therefore, in FIG. 13, lock ridges 55 (55a, 55b, 55c, ..., 55f are individually labeled) and rollers 53 (53a, 53b, 53).
c ...., 53f). When the outer shaft 51 rotates at a relatively high speed in the direction of arrow S5 in FIG. 13, the lock crests 55a approach each other while chasing the rollers 53a, and finally, The lock mountain 55a is the roller 53a
It catches up with and locks. When the lock is applied, the outer shaft 51 and the center shaft 52 integrally rotate in the arrow S5 direction. During this time, the blade 12
a (numbered individually as 12a1, 12a2, 12a3) and blade 12b (12b1, 12b2, 12b)
3, the reference numerals 3 and 4 are individually given), and between the blade 12a1 and the blade 12b1, the blade 12
b1 comes into a state of approaching while chasing the blade 12a1. In addition, each blade 12a1, 12a
2, 12a3 are set at equal angular intervals of 120 degrees, and each blade 12b1, 12b2, 12b3 is also set at equal angular intervals of 120 degrees.

Here, the rotational angle position of the blade 12a1 and the blade 12 when the lock is applied.
Consider the relationship between b1 and the rotational angle position. FIG.
, The difference between the angular position of the lock crest 55a and the angular position of the roller 53a until the lock crest 55a follows the roller 53a and locks is α, and the angular position of the blade 12a1 and the blade 1 under the same conditions
If the difference from the angular position of 2b1 is β, then α <β ... (Equation 1).

That is, this means that the lock crest 55a follows the roller 53a, the lock crest 55a catches up with the roller 53a, and the lock is applied, so that the outer shaft 51 and the center shaft 52 are united in the direction of arrow S5. Even if it rotates
Blade 12b1 has not yet reached blade 12a1,
It means that the blade 12b1 and the blade 12a1 do not overlap. Of course, the other blades (for example, the blade 12b2 and the blade 12a2) do not overlap with each other. In the present embodiment, the mounting angular position of the blade 12b to the outer shaft 51 (and thus the mounting of the second wind turbine 3) so as to prevent such blade catching up and passing between the blades 12a and 12b, Further, the mounting angular position of the blade 12a on the center shaft 52 (and thus the mounting of the first wind turbine 1) is set. The setting of the mounting angular positions of the blades 12a and 12b is performed by setting the corresponding relationship between the outer peripheral engaging teeth 54 and the key groove meshing with the outer peripheral engaging teeth 54 when the outer shaft 51 and the hub 13b are coupled, and the center shaft 52. It is realized by appropriately selecting the corresponding relationship between the inner peripheral key groove 57 and the engaging teeth that mesh with the inner peripheral key groove 57 when the hub 13a is coupled.

The same measure can be taken even when the outer shaft 51 of the lock bearing 50 makes a relative back movement. In FIG. 13, the lock mountain 55a locks by chasing the roller 53f by the back movement. The angular position of the lock mountain 55a and the roller 5
If the difference from the angular position of 3f is γ and the difference between the angular position of the blade 12a3 and the angular position of the blade 12b1 under the same conditions is δ, then γ <δ ... (Equation 2) it can.

According to the experiment, in the above formula 1, α + 20 ° ≦ β ... (Formula 3), that is, the blade 12b1 is the blade 1
2a1 is the minimum value of the difference between the angular position of the blade 12a1 and the angular position of the blade 12b1 when it is closest to 20a.
It has been found that it is preferable to set the frequency to about a degree. Conversely, when the blade 12b1 is farthest from the blade 12a1, the angular position of the blade 12a1 and the blade 12a1
It was found that it is preferable to set the maximum value of the difference from the angular position of b1 to 30 ° to 45 °.

Thus, the blade 12a and the blade 1
By rotating the first wind turbine 1 and the second wind turbine 3 while making them not to overlap with each other and making the first wind turbine 1 and the second wind turbine 3 related to each other, when strong winds are blowing from the front of the wind turbines 1 and 3, respectively. Blades 12 of windmills 1 and 3
Even if a and 12b are largely bent and deformed by the force of the wind, the first
Blade 12a of the wind turbine 1 and blade 12b of the second wind turbine 3
It is possible to avoid overlapping and colliding with each other or interfering with each other. In addition, it is possible to perform efficient wind power generation as described in the first to fourth embodiments.

The above equations 1 and 2 are generally expressed by the equation 1
It is desirable to set the priority so that However, the wind conditions in the area where the wind power generator is installed (wind direction, wind speed, turbulence magnitude, frequency of gusts, etc.)
Either of the two expressions may be satisfied, or both expressions may be satisfied.

FIG. 14 shows a modification of the fifth embodiment. In this modification, three lock ridges 55 of the outer shaft 51 are arranged on the inner peripheral surface of the outer shaft 51 at equal intervals. Further, three bearing receivers 56 and three rollers 53 on the side of the center shaft 52 are provided at equal intervals.
With such a configuration, the range of play motion in the lock bearing 50 can be made larger, and more free rotation motion between the first wind turbine 1 and the second wind turbine 3 can be secured.

The lock bearing 50 used in the fifth embodiment can be applied to the wind turbine generators according to the second to fourth embodiments, and in each of the embodiments. It is possible to obtain the advantages of both high performance and ensuring safety. As for the method of application, for example, when applied to the other embodiments shown in FIGS. 7, 8 and 9, the generator, the rotating shaft 14 as the first rotating shaft means, and the rotating shaft This is realized by disposing the lock bearing 50 in place of the one-way clutch 16 between the shaft 14 and the hub 13b which is the second rotating shaft means arranged concentrically with the center substantially aligned. Further, as described above, the lock bearing 50 may be arranged in place of the one-way clutch 16, or the one-way clutch 16 may be attached as it is, and in addition, the lock bearing 50 may be provided between the rotary shaft 14 and the hub 13b. You may arrange. In this way, basically, as described above, the first wind turbine 1 and the second wind turbine 3 rotate while mutually affecting each other by the engagement and disengagement (disconnection) by the one-way clutch 16, while the second wind turbine 3 is rotated. Blade 12b overlaps with blade 12a of first wind turbine 1,
Alternatively, when overcoming this, the lock bearing 50 may be locked before this.

[0063]

As described above, the wind power generator of the present invention has a plurality of coaxially arranged wind turbines that rotate by natural wind force to drive the generator, as is clear from the above embodiment. By providing the individual and overlapping in the front-rear direction, it is possible to obtain a larger rotating force of the wind turbine from the wind force, and it is possible to efficiently generate electric power, which is an extremely advantageous effect. That is, according to the present invention, the wind speed that was recognized as the minimum necessary for the conventional wind power generator to operate effectively was about 5 m / s ·, whereas in the present invention, the wind speed was 3 m / s ·. Even if the power generator is operating to a certain degree, it will operate effectively. This means that the wind speed (time) and wind speed of 3 m / s
Considering that the latter is far more frequent than the above frequency of wind blowing, it means a dramatic improvement in the actual working time of the wind turbine generator. Further, this means that the wind turbine generator according to the present invention can be installed in any place in Japan or in the world where wind can be blown (a weak wind is acceptable), which can be installed on an economic basis. To do. Therefore, for example, in Japan, the wind speed is 5m /
s ・ In search of areas with frequent winds, break the current situation where wind power generators are installed only in very limited areas (for example, Ryuhi Cape in Aomori Prefecture). If there is a local government that wants to use energy as a means of energy supply, any local government can consider the installation of wind power generators, which will bring about a change in the situation.

Further, according to the present invention, by providing the one-way clutch between the wind turbine and the generator, the rotational force of the wind turbine can be continuously transmitted to the generator, and the wind force can be efficiently used. It is possible to provide a wind turbine generator having an extremely excellent effect.

Further, according to the present invention, by providing the lock bearing between the first wind turbine and the second wind turbine,
The relative angular position of the blades of the wind turbine and the blades of the second wind turbine can be regulated within a predetermined range, whereby even if the blades of the respective wind turbines are largely bent and deformed by the force of the wind, the blades of the first wind turbine and (2) To provide a wind turbine generator having an extremely excellent effect that it is possible to avoid collision and interference with the blades of two wind turbines in an overlapping manner and to efficiently use wind power while ensuring safety. Is something that can be done.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view of a wind turbine generator shown as a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the one-way clutch according to the first embodiment cut in a direction perpendicular to a central axis thereof.

FIG. 3 is a cross-sectional view showing the one-way clutch according to the first embodiment, cut along the central axis thereof.

FIG. 4 is an operation explanatory view of the one-way clutch according to the first embodiment.

FIG. 5 is a schematic configuration diagram of a wind turbine generator according to the first embodiment.

FIG. 6 is a characteristic diagram showing the relationship between wind speed and generated torque in a wind turbine generator.

FIG. 7 is a vertical sectional side view of a wind turbine generator shown as a second embodiment.

FIG. 8 is a vertical sectional side view of a wind turbine generator shown as a third embodiment.

FIG. 9 is a vertical sectional side view of a wind turbine generator shown as a fourth embodiment.

FIG. 10 is a vertical sectional side view of a wind turbine generator shown as a fifth embodiment of the present invention.

FIG. 11 is a cross-sectional view showing a lock bearing according to a fifth embodiment, taken in a direction perpendicular to a central axis thereof.

FIG. 12 is a sectional view showing a lock bearing according to a fifth embodiment, taken along the central axis thereof.

FIG. 13 is a diagram for explaining the operation of the lock bearing according to the fifth embodiment in relation to the rotational angle position of the blade of the wind turbine.

FIG. 14 is a cross-sectional view showing a modified example of the lock bearing according to the fifth embodiment, taken in a direction perpendicular to the central axis thereof.

FIG. 15 is an external view of a conventional wind turbine generator.

[Explanation of symbols]

1st windmill 2 first pulley 3 second windmill 4 second pulley 7 Power transmission section 10 gearbox 11 generator 12a Blade of the first wind turbine 12b Blade of the second wind turbine 13a hub 13b hub 14 rotation axis 15 Output shaft member 16 one-way clutch 16a one-way clutch 16b one-way clutch 26 Outer shaft 27 Center axis 27a Claw 27b keyway 28 Laura 29 Laura 30 bias spring 50 lock bearing 51 outer shaft 52 Center axis 53 Roller 54 outer peripheral engaging teeth 55 Rock Mountain 56 bearing receiver 57 Inner peripheral keyway

Claims (12)

[Claims] 1. A wind turbine generator comprising a plurality of wind turbines which are rotated by receiving a natural wind force to drive a generator so as to coaxially overlap each other in the front-rear direction. 2. The blade of the wind turbine on the front side with respect to the direction in which the wind blows is formed shorter than the blade of the wind turbine on the rear side. Wind power generator. 3. A generator, a first wind turbine that rotates by receiving natural wind power to drive the generator, and a first wind turbine that overlaps with the first wind turbine and is provided behind the first wind turbine. A second wind turbine that receives the wind force of the rotor and rotates to drive the generator; and a second wind turbine that is interposed between the first wind turbine and the second wind turbine and the generator, and is disposed on the side of the first wind turbine and the second wind turbine. A clutch means for reducing the rotational load on the generator side by disconnecting the generator from the first wind turbine and / or the second wind turbine when a load is applied. Wind power generator. 4. The generator for a first wind turbine and the generator for a second wind turbine are provided as the generators.
The wind power generator described. 5. A one-way clutch configured to connect the clutch when the first wind turbine and / or the second wind turbine tries to rotate faster than the rotation of the generator is used as the clutch means. The wind turbine generator according to claim 3 or 4. 6. A generator, a first rotating shaft means, a second rotating shaft means arranged so that the center thereof substantially coincides with that of the first rotating shaft means, and the first rotating shaft means. Is attached to the
A first wind turbine that rotates by receiving a natural wind force, and a state in which the first wind turbine overlaps with the first wind turbine and is provided on the rear side of the first wind turbine, and is integrally rotatably attached to the second rotating shaft means. A second wind turbine that rotates by receiving a natural wind force; and a first wind turbine that is interposed between the first rotary shaft means and the generator with a clutch means for disconnecting power transmission provided in the middle.
A wind turbine power transmission means and a clutch means for interrupting the power transmission are provided in the middle, and are interposed between the second rotating shaft means and the generator.
A wind turbine power transmission means, and each clutch means is configured as a one-way clutch to which the clutch is connected when the corresponding wind turbine tries to rotate relatively faster than the rotation of the corresponding generator. A wind power generator characterized in that 7. A power generator for the first wind turbine, which is provided by being connected to the power transmission means for the first wind turbine, and a second wind turbine, which is provided so as to be connected to the power transmission means for the second wind turbine, as the generator. The wind power generator according to claim 6, further comprising: 8. A generator, a first rotating shaft means, a second rotating shaft means arranged concentrically with the first rotating shaft means at substantially the same center, and the first rotating shaft means. It is attached to the rotating shaft means of
A first wind turbine that rotates by receiving a natural wind force, and a state in which the first wind turbine overlaps with the first wind turbine and is provided on the rear side of the first wind turbine, and is integrally rotatably attached to the second rotating shaft means. A second wind turbine that rotates by receiving a natural wind force; a first wind turbine power transmission means that is interposed between the first rotating shaft means and the generator; the second rotating shaft means and the A second wind turbine power transmission means interposed between the generator and a generator, and the first rotation shaft means is disposed between the first rotation shaft means and the second rotation shaft means. A one-way clutch means to which a clutch is connected when the second rotary shaft means is trying to rotate faster than the rotation of the shaft means. 9. A generator, a first rotating shaft means, a second rotating shaft means arranged so that the center thereof substantially coincides with that of the first rotating shaft means, and the first rotating shaft means. Is attached to the
A first wind turbine that rotates by receiving a natural wind force; A second wind turbine that rotates by receiving a natural wind force; a power transmission unit interposed between the second rotating shaft unit and the generator; the first rotating shaft unit and the second rotating unit; A one-way clutch means, which is disposed between the first rotating shaft means and the second rotating shaft means and is connected with a clutch when the second rotating shaft means tries to rotate faster than the rotation of the first rotating shaft means. A wind turbine generator characterized in that. 10. A generator, a first rotary shaft means, a second rotary shaft means arranged so that the center thereof substantially coincides with the first rotary shaft means, and the first rotary shaft means. Is attached to the
A first wind turbine that rotates by receiving a natural wind force; A second wind turbine that rotates by receiving a natural wind force; a power transmission unit interposed between the first rotating shaft unit and the generator; the first rotating shaft unit and the second rotating unit; A one-way clutch means arranged between the shaft means and a clutch connected when the second rotary shaft means tries to rotate faster than the rotation of the first rotary shaft means. A wind turbine generator characterized in that. 11. A generator, a first wind turbine that receives natural wind power and rotates to drive the generator, and a first wind turbine that is overlapped with the first wind turbine and is provided behind the first wind turbine. A second wind turbine that receives the wind force of the rotor and rotates to drive the generator; and a second wind turbine that is interposed between the first wind turbine and the second wind turbine and the generator, and is disposed on the first wind turbine and the second wind turbine When a load is applied, a disconnection between the generator and the first wind turbine and / or the second wind turbine is cut off, and clutch means for reducing the rotational load on the generator side; the first wind turbine and the second wind turbine; A lock bearing interposed between the second wind turbine and the blade of the first wind turbine and defining a relative angular position of the blade of the second wind turbine within a predetermined angular range;
A wind power generator comprising: 12. The lock bearing defines a relative angular position between a blade of the first wind turbine and a blade of the second wind turbine,
A wind turbine generator characterized in that the blades of both wind turbines are defined in a predetermined angle range that does not overlap.