JP2007040239A - Wind power device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wind power device which utilizes the characteristic of a Sabonius airfoil at the time of startup of rotation or a breeze, and which can effectively convert rotation energy of a Darius airfoil and the Sabonius airfoil to electrical energy regardless of the strength of a wind velocity. <P>SOLUTION: The Darius airfoil and the Sabonius airfoil are provided so that the rotational direction of the rotary shaft for the Darius airfoil and the rotary shaft of the rotary shaft for the Sabonius airfoil are opposite each other. Then a gearing mechanism is provided which operates and connects the rotary shaft for the Darius airfoil to the rotary shaft for the Sabonius airfoil so that the rotational directions about an axis are made opposite to each other. Then magnetic substances are provided to one side of the rotary shafts for the Darius airfoil and the Sabonius airfoil, and coils are provided to the other side of the rotary shafts for the Darius airfoil and the Sabonius airfoil. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wind turbine generator that converts wind energy into electric energy, and more particularly, to a wind turbine generator that includes a Darrieus wing and a Savonius wing.

As a type of wind power generation apparatus that converts wind energy into electric energy, a composite wing type wind power generation apparatus including a Darrieus wing and a Savonius wing is used.
Such a composite wing-type wind turbine generator is excellent in high-speed rotation characteristics when the wind speed exceeds a predetermined value while utilizing the rotation by the Savonius blade excellent in low-speed rotation characteristics at the time of start-up or in a light wind state where the wind speed is a predetermined value or less. In addition, it is effective in that the rotation by the Darius blade can be used, but in a general composite blade type wind power generator, since the Savonius blade and the Darrieus blade are supported on the same rotation shaft, the rotation speed is high. In some cases, the Savonius wing becomes a rotational resistance to the Darrieus wing.

  In this regard, the Darrieus wing rotation shaft that supports the Darrieus wing is extrapolated to the Savonius wing rotation shaft that supports the Savonius wing, and the Darrieus wing rotation shaft is used as the Savonius wing rotation shaft in the low speed range. There has been proposed a configuration in which the engagement is performed and the engagement between the Darrieus blade rotation shaft and the Savonius blade rotation shaft is released in a high speed range (see Patent Document 1 below).

However, in the configuration described in this patent document, the engagement and disengagement between the rotation shaft for Darrieus blades and the rotation shaft for Savonius blades is performed by a one-way clutch, so the following inconvenience occurs.
That is, the one-way clutch includes a clutch main body that is externally inserted into the Savonius blade rotation shaft so as not to rotate relative to the Savonius blade rotation shaft and is relatively rotatably inserted into the Darrieus blade rotation shaft, and an inclination formed on the outer periphery of the clutch body. A groove, a cylindrical roller inserted into the inclined groove, and a spring for urging the cylindrical roller toward the shallow groove portion of the inclined groove.

  In such a one-way clutch, when the rotational speed of the rotary shaft for the Darrieus blade is slower than the rotational speed of the rotary shaft for the Savonius blade, the cylindrical roller is pushed into the shallow groove portion by the spring, and the cylindrical roller is The clutch body and the Darrieus wing rotary shaft are engaged with each other in a relatively non-rotatable manner, and the Darrieus wing rotary shaft has a rotational speed higher than that of the Savonius wing rotary shaft. And the cylindrical roller is pushed to the deep groove portion against the urging force of the spring by the frictional force between the cylindrical roller, and the engagement between the clutch body and the rotating shaft for the Darius blade is released. Yes.

  This wind power generator generates power by the cooperation of the Savonius blade rotating shaft and the Darrieus blade rotating shaft at the time of start or light wind, and then switches to power generation using only the Darrieus blade rotating shaft when the wind speed increases. However, at this time, the Savonius blade rotating shaft is not involved in power generation even though it is rotated by the wind.

As described above, the conventional wind power generator including the configuration described in the patent document is configured such that the Darrieus wing and the Savonius wing rotate in the same direction around the axis, and there is room for improvement in terms of power generation efficiency. is there.
JP-A-9-287546

  The present invention has been made in view of the prior art, and is a wind power generation apparatus including a Darrieus wing and a Savonius wing, which uses the characteristics of the Savonius wing at the time of rotation start or a slight wind, and has a large or small wind speed. It is an object of the present invention to provide a wind turbine generator that can efficiently convert the rotational energy of the Darrieus wing and the Savonius wing to electric energy regardless of the above.

  In order to achieve the above object, the present invention achieves the Darrieus wing rotation shaft and Savonius wing rotation shaft which are set up substantially vertically, and the Darrieus wing rotation shaft in the first direction around the axis by the wind in a predetermined direction. A Darrieus blade supported so as not to rotate relative to the Darius blade rotation shaft so as to rotate, and the Savonius blade rotation shaft around the axis in a second direction opposite to the first direction by the wind in the predetermined direction. The Savonius blade supported so as not to rotate relative to the Savonius blade rotation shaft so as to rotate, and the Darius blade rotation shaft and the Savonius blade rotation shaft are operatively connected so that the rotation directions around the axis are opposite to each other. A transmission mechanism, a magnetic body provided on one of the rotary shaft for the Darius blade and the rotary shaft for the Savonius blade, and the rotation for the Darius blade so as to pass through a magnetic field region by the magnetic body. And to provide a wind turbine generator and a coil provided on the other of the Savonius blades rotating shaft.

Preferably, the Darrieus wing rotation shaft and the Savonius wing rotation shaft are arranged concentrically, and the transmission mechanism is a planetary transmission mechanism.
The planetary transmission mechanism includes first and second elements operatively connected to the Darrieus wing rotating shaft and the Savonius wing rotating shaft, respectively, and a third element serving as a fixed element.

  Preferably, a brake device capable of applying a braking force to one of the Darrieus blade rotation shaft or the Savonius blade rotation shaft can be further provided.

Preferably, the Darrieus blade rotating shaft is supported so as to be relatively rotatable in a state of being extrapolated to the Savonius blade rotating shaft.
In such a configuration, for example, the coil is supported by the Savonius blade rotation shaft, and the magnetic body is supported by the Darrieus blade rotation shaft.
Alternatively, the coil may be supported on the Darrieus wing rotating shaft, and the magnetic body may be supported on the Savonius wing rotating shaft.

According to the wind turbine generator according to the present invention, the Darius blade and the Savonius blade are provided so that the rotation direction of the rotation shaft for the Darius blade and the rotation shaft of the Savonius blade are opposite to each other, and the rotation direction about the axis is provided. Since a transmission mechanism is provided to operatively connect the rotary shaft for the Darius blade and the rotary shaft for the Savonius blade so that they are opposite to each other, the Darrieus blade is rotated by utilizing the rotation of the Savonius blade during start-up or in a light wind. In addition, the relative rotational speed difference between the Darrieus blade rotating shaft and the Savonius blade rotating shaft can be increased regardless of the wind speed.
Therefore, the relative speed difference between the magnetic material supported on one of the rotating shaft for the Darius blade and the rotating shaft for the Savonius blade and the coil supported on the other of the rotating shaft for the Darius blade and the rotating shaft for the Savonius blade. The power generation efficiency can be improved.

Hereinafter, a preferred embodiment of a wind turbine generator according to the present invention will be described with reference to the accompanying drawings.
FIG. 1 shows a schematic front view of a wind turbine generator 1A according to the present embodiment.

As shown in FIG. 1, the wind power generator 1 </ b> A is a composite wing type wind power generator including a Darrieus blade 20 and a Savonius blade 40.
Specifically, the wind power generator 1A includes a Darius wing rotary shaft 10 and a Savonius wing rotary shaft 30 that are erected substantially vertically, and a Darius supported by the Darius wing rotary shaft 10 so as not to be relatively rotatable. A wing 20 and a Savonius wing 40 supported so as not to rotate relative to the Savonius wing rotating shaft 30 are provided.

In the present embodiment, the Darrieus wing rotary shaft 10 and the Savonius wing rotary shaft 30 are arranged coaxially.
Specifically, the Savonius blade rotating shaft 30 has a total length substantially equal to the total length of the wind turbine generator 1A.
On the other hand, the Darrieus wing rotating shaft is extrapolated to the lower portion of the Savonius wing rotating shaft 30 so as not to interfere with the Savonius wing rotating shaft 30 supported by the Savonius wing rotating shaft 30. ing.

FIG. 2 is a schematic plan view of the Darius wing 20 and the Savonius wing 40.
As shown in FIG. 2, the Darrieus wing 20 is not rotatable relative to the Darrieus wing rotation shaft 10 so as to rotate the Darius wing rotation shaft 10 in the first direction R1 around the axis by wind in a predetermined direction X. It is supported.
Specifically, as shown in FIG. 1, the Darrieus wing 20 is supported at its lower end portion so as not to rotate relative to the Darius wing rotating shaft 10, and its upper end portion is supported by the Savonius wing rotating shaft via a bearing member. 30 is supported in a relatively rotatable manner.

On the other hand, as shown in FIG. 2, the Savonius blade 40 rotates the Savonius blade rotating shaft 30 around the axis in a second direction R2 opposite to the first direction R1 by the wind in the predetermined direction X. The Savonius blade rotating shaft 30 is supported so as not to be relatively rotatable.
As shown in FIG. 1, the wind turbine generator 1A according to the present embodiment includes first and second Savonius blades 40a and 40b arranged vertically as the Savonius blades 40.

  As shown in FIG. 1, the wind turbine generator 1 </ b> A according to the present embodiment further includes a transmission mechanism 50 that operatively connects the Darrieus blade rotation shaft 10 and the Savonius blade rotation shaft 30, and the Darius blade rotation. The magnetic body 60 supported by the shaft 10, the coil 70 supported by the Savonius blade rotating shaft 30, the Darrieus blade rotating shaft 10 and the Savonius blade rotating shaft 30, and the transmission mechanism 50 are supported. , And a support box 100 that defines a housing space for housing the magnetic body 60 and the coil 70.

FIG. 3 shows a longitudinal front view of the support box 100.
As shown in FIGS. 1 and 3, the support box 100 includes a base plate 101 placed on an installation surface provided on a rooftop of a building, a tower, or a power transmission tower, and a peripheral wall portion extending upward from the periphery of the base plate 101. 102, an upper plate 103 provided at an upper end portion of the peripheral wall portion 102, and an intermediate plate 104 extending substantially horizontally between the upper plate 103 and the base plate 101.
3 is an upper support shaft extending between the intermediate plate 104 and the upper plate 103 so that the intermediate plate 104 can be supported, and reference numeral 106 supports the intermediate plate 104. A lower support shaft extending between the intermediate plate 104 and the base plate 101 to obtain.

An upper end portion and a lower end portion of the rotary shaft 10 for Darrieus blades are supported by the upper plate 103 and the intermediate plate 104 so as to be rotatable about an axis via bearing members, respectively.
The Savonius blade rotation shaft 30 is supported by the inner peripheral surface of the Darrieus blade rotation shaft 10 and the intermediate plate 104 through a plurality of bearing members spaced apart from each other so as to be rotatable about its axis.
In the present embodiment, the Savonius blade rotation shaft 30 has an inner peripheral surface of the Darrieus blade rotation shaft 10 and the intermediate plate 104 so that a lower end portion extends downward from the intermediate plate 104. It is supported by.
A brake device 150 and a current collector 200, which will be described later, are arranged at the lower end of the Savonius blade rotating shaft 30.

The transmission mechanism 50 operatively connects the Darrieus wing rotary shaft 10 and the Savonius wing rotary shaft 30 so that the rotation directions around the axis are opposite to each other.
As shown in FIGS. 1 and 3, the wind turbine generator 1 </ b> A according to the present embodiment includes a planetary transmission mechanism as the transmission mechanism 50, thereby reducing the size of the transmission mechanism 50. Yes.
As this planetary system, there are a gear system, which will be described in detail below, and a traction, that is, a friction transmission system, whichever may be used. Incidentally, the friction transmission type has a solar wheel, an internal ring, a planetary wheel and a carrier, and is configured to frictionally transmit torque by pressing the solar wheel, the internal ring and the planetary wheel against each other. Yes.

FIG. 4 is a sectional view taken along line IV-IV in FIG.
As well shown in FIGS. 3 and 4, in the present embodiment, the transmission mechanism 50 includes a planetary gear transmission mechanism.
The planetary gear transmission mechanism includes a sun gear 51, a planetary gear 54 meshed with the sun gear 51 so as to revolve around the sun gear 51, the planetary gear 54, and the planetary gear 54 together with the planetary gear 54. A carrier 52 configured to revolve around the sun gear 51 and an internal gear 53 that meshes with the planetary gear 54 are provided.

As shown in FIGS. 3 and 4, in the present embodiment, the sun gear 51 is not rotatable relative to the Savonius blade rotating shaft 30, and the internal gear 53 is rotated for the Darrieus blade. It is impossible to rotate relative to the shaft 10. The carrier 52 is a fixing member.
With this configuration, when the Savonius blade rotating shaft 30 rotates in the second direction R2 about the axis, the Darrieus blade rotating shaft 10 rotates in the opposite first direction R1 about the axis ( (See FIG. 4).

The magnetic body 60 and the coil 70 are arranged so that the coil 70 passes through a magnetic field region by the magnetic body 60 when the Darrieus wing rotating shaft 10 and the Savonius wing rotating shaft 30 rotate relative to each other. Has been.
In the present embodiment, as shown in FIGS. 1 and 3, the magnetic body 60 is supported on the inner peripheral surface of the Darrieus blade rotating shaft 10.
The coil 70 is supported on the outer peripheral surface of the Savonius blade rotating shaft 30 so as to face the magnetic body 60.

  Further, as shown in FIGS. 1 and 3, the wind power generator 1A according to the present embodiment includes a current collector 200 for taking out electric energy from the coil 70 in addition to the above-described configuration, and the Darrieus blade A brake device 150 is provided for operatively applying a braking force to the rotary shaft 10 and the Savonius blade rotary shaft 30.

The current collector 200 includes a rotating unit 210 including a slip ring electrically connected to the output end 71 of the coil 70, and a brush electrically connected to the slip ring by slidingly contacting the slip ring. And a fixing part 220 including
In the present embodiment, as well shown in FIG. 3, the output end 71 of the coil 70 is disposed on the axis of the Savonius blade rotating shaft 30.
Therefore, the rotating part 210 is connected to the lower end of the Savonius blade rotating shaft 30 so that the slip ring is positioned coaxially with the Savonius blade rotating shaft 30.

As described above, the Darrieus blade rotating shaft 10 and the Savonius blade rotating shaft 30 are operatively connected to each other via the transmission mechanism 50.
Therefore, by applying a braking force to only one of the Darrieus blade rotating shaft 10 or the Savonius blade rotating shaft 30, both the Darrieus blade rotating shaft 10 and the Savonius blade rotating shaft 30 are operatively controlled. Power can be added.
In view of this point, the brake device 150 is configured to apply a braking force only to one of the Darrieus blade rotating shaft 10 or the Savonius blade rotating shaft 30.

In the present embodiment, the brake device 150 is configured to apply a braking force to the lower end portion of the Savonius blade rotating shaft 30.
Specifically, as shown in FIG. 3, the brake device 150 includes a brake disk 151 supported on the lower end portion of the Savonius blade rotating shaft 30 so as not to be relatively rotatable and movable in the axial direction. And a pair of brake pads 155 disposed opposite to each other with the disk 151 interposed therebetween.
At least one of the pair of brake pads 155 is a movable pad 155a that presses the brake disk 151 based on an external operation.
In the present embodiment, one of the pair of brake pads 155 is a movable pad 155a and the other is a fixed pad 155b.

Further, the brake device 150 includes an operating mechanism 160 that operates the movable pad 155a.
In the present embodiment, the operating mechanism 160 is configured to operate the movable pad 155a by hydraulic pressure.

FIG. 5 shows a schematic diagram of the hydraulic operation mechanism 160.
As shown in FIG. 5, the hydraulic operation mechanism 160 includes a movable pad holding case 161 that holds the movable pad 155a so as to be movable in a direction orthogonal to the brake disk 151, and one end portion on the back side of the movable pad 155a. A hydraulic line 162 fluidly connected to the side opposite to the surface facing the brake disc 151, a master cylinder 163 fluidly connected to the other end of the hydraulic line 162, and a hydraulic line connecting end of the master cylinder 163 A hydraulic piston 164 that is axially slidable and liquid-tightly inserted into an end opposite to the portion 163a, and that biases the hydraulic piston 164 toward the opposite side of the hydraulic line connecting end 163a. The urging member 165 and the urging force of the urging member 165 face the hydraulic piston 164 toward the hydraulic line connecting end 163a. A push arm 166 swingable about a pivot shaft 166a orthogonal to the moving direction of the piston 164 so as to be movable, and a brake piston swinging the push arm 166 about the pivot shaft 166a 167 and a brake cylinder 168 (see FIG. 3) that accommodates the brake piston 167 so as to be slidable in the axial direction.
In the present embodiment, the push arm 166 has an engaging portion 166c for manual operation in addition to the engaging portion 166b for the brake piston 167 so that the manual operation can be performed. (See FIG. 5).

In such a wind turbine generator 1A, the following effects can be obtained.
In the present embodiment, as described above, the Darius blade 20 rotates relative to the Darius blade rotating shaft 10 so as to rotate the Darius blade rotating shaft 10 in the first direction R1 around the axis by wind in a predetermined direction. The Savonius wing 40 is disabled and the Savonius wing 40 rotates the Savonius wing rotating shaft 30 around the axis in a second direction R2 opposite to the first direction R1 by the wind in the predetermined direction. The rotary shaft 30 is supported so as not to be relatively rotatable.

That is, in the wind turbine generator 1A according to the present embodiment, the Darrieus wing 20 and the Savonius wing 40 are configured to rotate in opposite directions.
Therefore, as shown in FIG. 6, the relative speed difference between the magnetic body 60 and the coil 70 that defines the power generation amount can be significantly increased as compared with the conventional configuration.
6 shows a wind power generator in which the Darrieus wing and the Savonius wing are supported on a single rotating shaft, and the conventional 2 shows the rotating shaft for the Darrieus wing and the rotation for the Savonius wing in the low speed range. The wind power generator is configured such that the shaft integrally rotates in the same direction, and the Darrieus blade rotation shaft and the Savonius blade rotation shaft individually rotate in the same direction in the high speed range.

Furthermore, in the wind turbine generator 1A according to the present embodiment, as described above, the transmission mechanism 50 operatively connects the Darrieus blade 10 and the Savonius blade rotation shaft 30 so that the rotation directions of the transmission mechanism 50 are opposite to each other. is doing.
Therefore, while allowing the rotation direction of the Darrieus blade rotation shaft 10 by the Darius blade 20 and the rotation direction of the Savonius blade rotation shaft 30 by the Savonius blade 40 to be opposite, the starting speed and the wind speed are predetermined. The Darrieus blade 20 can be rotated using the rotational power of the Savonius blade 40 at the time of the following breeze, thereby improving the startability of the Darius blade 20 and the power generation efficiency at the time of the light wind. be able to.

In the present embodiment, the magnetic body 60 is supported by the Darrieus wing rotating shaft 10 in a configuration in which the Darius wing rotating shaft 10 is extrapolated to the Savonius wing rotating shaft 30 so as to be relatively rotatable. Further, although the coil 70 is supported on the Savonius blade rotating shaft 30, the present invention is of course not limited to such a form.
For example, as shown in FIG. 7, in the configuration in which the Darrieus wing rotating shaft 10 is extrapolated to the Savonius wing rotating shaft 30 so as to be relatively rotatable, the magnetic body 60 is supported by the Savonius wing rotating shaft 30. In addition, the coil 70 can be supported on the rotary shaft 10 for Darrieus blade.
In the wind power generator 1 </ b> B shown in FIG. 7, the rotating part 210 of the current collector 200 is supported on the outer peripheral surface of the Darrieus blade rotating shaft 10.

FIG. 1 is a schematic front view of a wind turbine generator according to an embodiment of the present invention. FIG. 2 is a schematic plan view of a Darrieus wing and a Savonius wing in the wind power generator shown in FIG. FIG. 3 is a longitudinal front view of a support box in the wind turbine generator shown in FIG. 1. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. FIG. 5 is a schematic diagram of a hydraulic operation mechanism in the brake device provided in the wind turbine generator shown in FIG. FIG. 6 is a graph showing the relationship between the relative speed difference between the magnetic body and the coil and the power generation amount, and shows a comparison between the wind power generator shown in FIG. 1 and the conventional wind power generator. FIG. 7 is a schematic front view of a wind turbine generator according to another embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1A, 1B Wind power generator 10 Darrieus blade rotary shaft 20 Darius blade 30 Savonius blade rotary shaft 40 Savonius blade 50 Transmission mechanism 51 Sun gear 52 Carrier 53 Internal gear 60 Magnetic body 70 Coil 150 Brake device

Claims (5)

A rotating shaft for a Darius wing and a rotating shaft for a Savonius wing installed substantially vertically;
A Darius blade supported by the Darius blade rotation shaft so as not to rotate relative to the Darius blade rotation shaft so as to rotate the Darius blade rotation shaft in the first direction around the axis by wind in a predetermined direction;
A Savonius blade supported by the Savonius blade rotation shaft so as not to rotate relative to the Savonius blade rotation shaft so as to rotate the Savonius blade rotation shaft in a second direction opposite to the first direction by the wind in the predetermined direction;
Provided on one of the transmission mechanism for operatively connecting the Darrieus wing rotation shaft and the Savonius wing rotation shaft, and the Darrieus wing rotation shaft and the Savonius wing rotation shaft so that the rotation directions around the axis are opposite to each other. Magnetic material,
A wind turbine generator comprising: a coil provided on the other of the rotating shaft for the Darrieus blade and the rotating shaft for the Savonius blade so as to pass through the magnetic field region of the magnetic material. The Darrieus wing rotating shaft and the Savonius wing rotating shaft are arranged concentrically,
The transmission mechanism is a planetary transmission mechanism,
The planetary transmission mechanism includes first and second elements operatively connected to the Darrieus wing rotating shaft and the Savonius wing rotating shaft, respectively, and a third element serving as a fixed element. The wind power generator according to claim 1.   The wind turbine generator according to claim 1 or 2, further comprising a brake device capable of applying a braking force to one of the rotary shaft for Darrieus blades or the rotary shaft for Savonius blades. The Darius wing rotary shaft is supported so as to be relatively rotatable in a state of being extrapolated to the Savonius wing rotary shaft,
4. The wind turbine generator according to claim 1, wherein the coil is supported by the Savonius blade rotation shaft, and the magnetic body is supported by the Darrieus blade rotation shaft. 5. The Darius wing rotary shaft is supported so as to be relatively rotatable in a state of being extrapolated to the Savonius wing rotary shaft,
The wind turbine generator according to any one of claims 1 to 3, wherein the coil is supported by the Darrieus wing rotating shaft, and the magnetic body is supported by the Savonius wing rotating shaft.

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