JP4748746B1 - Vertical axis wind power generator - Google Patents

Abstract

A vertical axis wind power generator is provided that is automatically housed in a windbreak wall in a strong wind such as a typhoon so that the blades are not damaged.
A vertical shaft type comprising a rotary shaft 1 provided in a vertical direction, vertical blades 2 attached in the circumferential direction of the rotary shaft 1, and a generator 3 to which the rotary shaft 1 is connected. It is a wind power generator. A cylindrical windbreak wall 6 that surrounds the rotation region of the blades 2 is installed. On the other hand, a wind force detector 7 is attached to the rotating shaft 1, and a height adjusting mechanism 8 that moves the blade 2 up and down along the axial direction of the rotating shaft 1 based on a signal from the wind force detector 7 is attached. Accordingly, the blade 2 is accommodated in the windbreak wall 6 by operating the height adjusting mechanism 8 according to the wind force.
[Selection] Figure 1

Description

  The present invention relates to a vertical axis wind power generator that is automatically housed in a windbreak wall in the case of strong winds such as a typhoon so that the blades are not damaged.

  Conventionally, many wind power generators that generate power using wind power have been installed. This wind turbine generator rotates blades by the force of natural wind and converts this rotational energy into electric power. In addition, various blades having various sizes and shapes have been put into practical use, such as blades of about 1 m to large tens of m.

  As a place for installing such a wind power generation device, naturally, a beach or a plateau where the wind is good is selected, and it is considered to generate power efficiently. However, in the case of a strong wind such as a typhoon, there was a case where the wind contact was too strong and the blades were damaged. Therefore, basically, the blades are made of a material having sufficient strength to withstand strong winds such as typhoons to prevent breakage, but there is a problem that the cost is very high.

On the other hand, instead of using an expensive material, a windmill (for example, see Patent Document 1) in which the blades are folded and stored in a strong wind, or a windproof cover is provided around the blades to prevent the blades from being damaged. A windmill (see, for example, Patent Documents 2 and 3) has also been proposed. However, all of the windmills described in Patent Documents 1 to 3 have problems that it is difficult to reliably prevent damage to the blades because the blades cannot be completely stored in the windproof cover, and it is troublesome to perform the storage operation manually. In addition, there is a problem that the storage judgment varies.
In particular, in a vertical axis wind power generator in which the blades are fixed to a rotating shaft that stands upright in the direction perpendicular to the wind direction, an effective mechanism that can protect the blades has not been put into practical use, and a proposal has been awaited. This is the current situation.

JP 2004-132186 A JP 7-259722 A JP 2003-262183 A

  The present invention solves the above problems and provides a vertical axis wind power generator that can be automatically housed in a windbreak wall in the case of a strong wind such as a typhoon to prevent blade damage. It was completed for the purpose.

The vertical axis wind power generator of the present invention, which has been made to solve the above-mentioned problems, includes a rotary shaft provided in the vertical direction, vertical blades attached in the circumferential direction of the rotary shaft, and the rotary shaft. A vertical axis wind power generator having a generator connected to it, and a cylindrical windbreak wall that surrounds the rotation region of the blades is installed from the outside, while a wind detector is attached to the rotation shaft, A height adjustment mechanism that moves the blade up and down along the axial direction of the rotation axis based on the signal from the wind detector is attached, and the blade is stored in the windbreak wall by operating the height adjustment mechanism according to the wind force. In the vertical axis wind power generator configured as described above, the height adjusting mechanism includes a bar-shaped feed screw that is suspended in parallel with the rotation shaft, and a blade support bracket that is screwed to the feed screw. The feed screw is a wind detector The support bracket is moved up and down on the feed screw together with the blades by driving the motor, and the outer periphery of the rotating shaft is a polygonal cylinder along the axial direction. A cylindrical case is attached, and a feed screw and a support bracket are accommodated in the polygonal cylindrical case .

Moreover, it is preferable that a rotating disk is mounted on the base so as to be horizontally rotatable, and a rotating shaft is integrally suspended from the center of the rotating disk, and this is an invention according to claim 2. .

Further, it is preferable that magnets that repel each other are installed between the upper surface of the base and the lower surface of the rotating disk and between the outer peripheral edge of the rotating disk and the inner peripheral surface of the standing edge of the base. Are the inventions according to claims 3 and 4 , respectively.

  According to the first aspect of the present invention, in the vertical axis wind power generator, a cylindrical windbreak wall that surrounds the rotation region of the blades is installed from the outside, and a wind power detector is attached to the rotation shaft. A height adjustment mechanism for moving the blade up and down along the axial direction of the rotating shaft based on a signal from the detector is attached, and the blade is stored in the windbreak wall by operating the height adjustment mechanism according to the wind force. Therefore, in the case of a strong wind such as a typhoon, the blades are automatically stored in the windbreak wall, and the blades can be prevented from being damaged by the wind.

The height adjusting mechanism includes a rod-shaped feed screw that is suspended in parallel with the rotation shaft, and a blade support bracket that is screwed to the feed screw. It is connected to the motor driven based on the signal, and the support bracket moves up and down on the feed screw together with the blade by driving this motor, so the blade can be moved up and down with a low-cost device without a complicated structure. Can be realized.

Furthermore, a polygonal cylindrical case is attached to the outer peripheral surface of the rotating shaft along the axial direction, and a feed screw and a support bracket are housed in the polygonal cylindrical case. It becomes possible to operate the adjusting mechanism accurately and reliably.

In the invention according to claim 2 , the rotating disk is mounted on the base so as to be horizontally rotatable, and the rotating shaft is integrally suspended at the center of the rotating disk, so that the rotation of the blade is stable and stable. Smooth and efficient power generation.

According to the third and fourth aspects of the present invention, magnets that repel each other are installed between the upper surface of the base and the lower surface of the rotating disk , or between the outer peripheral edge of the rotating disk and the inner peripheral surface of the standing edge of the base. Therefore, the frictional force is reduced, and the rotating disk can be smoothly rotated with a small force. Further, according to the third aspect of the present invention, it is possible to prevent the vertical rotation of the rotating disk , and in the fourth aspect , it is possible to prevent the horizontal rotation of the rotating disk .

It is a schematic front view which shows embodiment of this invention. FIG. 2 is a perspective view of FIG. 1. It is a schematic front view which shows the state which accommodated the blade | wing. FIG. 4 is a perspective view of FIG. 3. It is a perspective view which shows the principal part of a height adjustment mechanism. It is a perspective view which shows the principal part of other height adjustment mechanisms. It is a schematic plan view which shows embodiment of this invention. It is a schematic plan view which shows other embodiment. It is a schematic plan view which shows other embodiment. It is explanatory drawing which shows arrangement | positioning of a magnet.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic front view showing a vertical axis wind power generator of the present invention, and FIG. 2 is a perspective view thereof. In the figure, 1 is a rotary shaft provided in a vertical direction so as to be perpendicular to the direction of wind travel, 2 is a longitudinal blade attached in a radial manner in the circumferential direction of this rotary shaft 1, 3 The generator is connected to the rotating shaft 1.
1 shows two blades 2 provided in the circumferential direction of the rotating shaft 1 (see FIG. 7), but as shown in FIG. 8, four blades are provided radially, and others. These may be provided, and as shown in FIG. 9, the blades can be easily rotated as being curved in the rotational direction.

In the figure, reference numeral 4 denotes a cylindrical base, and a rotating disk 5 is placed on the base 4 so as to be horizontally rotatable. In addition, the rotary shaft 1 is vertically suspended from the center of the rotating disk 5 toward the upper part, while the rotating shaft 1 extends downward from the lower surface side of the rotating disk 5 so that the generator 3 It is connected. Further, a cylindrical windbreak wall 6 is installed so as to surround the outer periphery of the base 4, that is, so as to surround the rotation region of the blade 2 from the outside.
The blade 2 is made of cloth or a synthetic resin plate, and the rotating disk 5 is made of light aluminum, aluminum alloy, carbon or the like, and the windbreak wall 6 has a diameter of 5 to 50 m and a height of about 3 to 20 m. It is.

The rotary shaft 1 is provided with a wind force detector 7 for detecting wind force from the rotation of the shaft. The blade 2 is moved up and down along the axial direction of the rotary shaft 1 based on a signal from the wind force detector 7. A height adjusting mechanism 8 to be moved is attached. Thereby, the height adjusting mechanism 8 is operated according to the wind force, and the blade 2 is stored in the windbreak wall 6 so as to surely prevent the blade 2 from being damaged by the strong wind.
That is, a signal from the wind detector 7 is input to a controller (not shown), and a control signal corresponding to the wind force is output from the controller, and the height adjusting mechanism 8 is operated by an arbitrary amount based on the control signal. It is configured as follows. One height adjusting mechanism 8 is attached to each blade 2, and a motor 11 described later is also attached to the rotating disk 5 one by one.

As shown in FIG. 5, the height adjusting mechanism 8 has a rod-like feed screw 9 suspended in parallel with the rotary shaft 1 and a support bracket 10 for the blade 2 screwed into the feed screw 9. The feed screw 9 is connected to a motor 11 that is driven based on a signal from the wind force detector 7, and the support bracket 10 moves up and down on the feed screw 9 together with the blades 2 by driving the motor 11. Yes. That is, the height adjustment mechanism 8 does not operate in a predetermined wind force range where there is no risk of blade damage, and in the case of strong winds such as typhoons, the height adjustment mechanism 8 operates to completely prevent the blade 2 from being protected from wind. It is automatically lowered until it is housed in 6.
It is preferable to control the blade 2 to be lowered in steps and stopped at an arbitrary position so as to reduce the possibility of breakage with respect to the intermediate wind value.

  A polygonal cylindrical case 12 (in the illustrated example, it is a square cylindrical shape, but may be a polygon larger than this) is attached to the outer peripheral surface of the rotating shaft 1. The feed screw 9 and the support bracket 10 are housed in the inside 12. In addition, the back side of the cylindrical case 12 is fixed to the outer peripheral surface of the rotating shaft 1, while the front side is configured as an opening 13 so that the blade 2 can be moved up and down. The opening 13 may be a slit-like longitudinal groove. Further, the outer shape of the support bracket 10 has a flat surface portion like a hexagonal nut so that it can move up and down without rotating within the polygonal cylindrical case 12.

  As shown in FIG. 5, the support bracket 10 has two types in the upper and lower sides and supports the blades 2, and as shown in FIG. In addition, three or more types may be used. Further, when the blade 2 becomes larger and heavier, a support rod and a motor (not shown) are provided at the lower end of the outer peripheral portion of the blade 2, and the support rod is moved up and down in synchronization with the height adjustment mechanism 8. 2 may be supported.

  In the above description, the operation of the height adjustment mechanism 8 is performed by the motor 11 and the feed screw 9. However, the height of the blade 2 is adjusted by a hydraulic motor and a cylinder (not shown). You can also.

Between the lower surface of the upper surface and the rotary disc 5 of the base 4, both to reduce the frictional force by repulsion by the magnetic force, smoothly repel one another for rotation with a small force the rotating plate 5 magnet It is preferable to install 14a and 14b. For the same purpose, magnets 15 a and 15 b can be installed between the outer peripheral edge of the rotating disk 5 and the inner peripheral surface of the standing edge 4 a of the base 4.
FIG. 10 is an explanatory view showing the arrangement of the magnets. The magnets 14a and 14b are evenly arranged on the upper surface of the base 4 and the lower surface of the rotating disk 5 at regular intervals in a radial pattern, thereby rotating the rotating disk 5. It is possible to prevent the vertical movement of the camera. Further, by horizontally arranging the magnets 15 a and 15 b between the outer peripheral edge of the rotating disk 5 and the inner peripheral surface of the standing edge 4 a of the base 4, the horizontal movement of the rotating disk 5 can be prevented.

Next, the operation of the vertical axis wind power generator of the present invention configured as described above will be described.
In the case of normal operation within the range of a predetermined wind power value where there is no risk of damage to the blades, as shown in FIG. 1, the height adjustment mechanism is not activated and the blades rise most up and above the windbreak wall. It is in a high position that jumps out and is not affected by the windbreak. Therefore, in this state, the blade is rotated by receiving wind on the entire blade, and the generator is efficiently rotated by applying a rotational force to the rotating shaft.

On the other hand, in the case of a strong wind such as a typhoon, the rotational speed of the rotating shaft increases, and a wind force signal is output from the wind force detector and input to a controller (not shown). Next, a control signal corresponding to the wind force is output from the controller, and based on this, the motor of the height adjusting mechanism is operated by a predetermined amount. In this case, as shown in FIG. 3, the adjusting mechanism operates to lower the blades until they are completely stored in the windbreak wall. As a result, since the blades are protected by the windbreak wall, breakage such as being broken by being blown by the wind or being destroyed by colliding with flying objects is reliably prevented.
Of course, it is possible to control the intermediate wind force value so that the blades are lowered in stages while projecting from the windbreak wall in order to reduce the possibility of breakage, and stopped at an arbitrary position. .

  As described above, in the case of a strong wind such as a typhoon, the present invention can detect wind force and automatically store the blades in the windbreak wall to reliably prevent the blades from being damaged. In addition, it has an advantage that the structure is simple, the number of parts is small, it can be manufactured at low cost, and maintenance work can be easily performed.

DESCRIPTION OF SYMBOLS 1 Rotating shaft 2 Blade | wing 3 Generator 4 Base 4a Standing edge part 5 Rotating disc 6 Windbreak 7 Wind detector 8 Height adjustment mechanism 9 Feed screw 10 Support bracket 11 Motor 12 Polygonal cylindrical case 13 Opening part
14a magnet
14b magnet
15a magnet
15b magnet

Claims (4)

A vertical axis wind power generator comprising a rotating shaft provided in a vertical direction, a plurality of vertically attached blades in the circumferential direction of the rotating shaft, and a generator to which the rotating shaft is connected, the blade A windshield wall is installed to enclose the rotation area of the wind turbine from the outside. On the other hand, a wind force detector is attached to the rotating shaft, and the blades are vertically moved along the axial direction of the rotating shaft based on a signal from the wind force detector. In the vertical axis wind power generator in which the height adjusting mechanism to be moved is attached and the blades are housed in the windbreak wall by operating the height adjusting mechanism according to the wind force , the height adjusting mechanism is rotated It has a rod-shaped feed screw suspended in parallel with the shaft and a blade support bracket screwed to the feed screw, and the feed screw is connected to a motor that is driven based on a signal from the wind force detector. By driving this motor The support bracket moves up and down on the feed screw together with the blades, and a polygonal cylindrical case is attached to the outer peripheral surface of the rotating shaft along the axial direction, and the feed screw is placed in the polygonal cylindrical case. And a vertical axis wind power generator , wherein the support bracket is housed . The vertical axis wind power generator according to claim 1, wherein a rotating disk is mounted on the base so as to be horizontally rotatable, and a rotating shaft is integrally suspended from the center of the rotating disk. The vertical axis wind power generator according to claim 2, wherein magnets that repel each other are installed between the upper surface of the base and the lower surface of the rotating disk. The vertical axis wind power generator according to claim 2, wherein magnets that repel each other are installed between the outer peripheral edge of the rotating disk and the inner peripheral surface of the vertical edge of the base.

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