JP2001082314A - Wind power generating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a rotation suppressing action by providing a shielding part preventing wind from flowing into vanes moving in the direction reverse to the forward movement direction of the wind and a direction adjusting part positioned based on the shielding part and the forward movement direction of the wind. SOLUTION: A shielding part main body 51 comprises an annular support part 52 and a disk support part 53, a column part 54 connecting these support parts to each other, and shielding plates 55 disposed on the column part 54 opposedly to each other. The shielding plates 55 prevent wind W from flowing into vanes 42f to 42h moving in the direction reverse to that of the wind W. When the wind strikes the vanes 42b to 42d, a rotating force is given to a rotating shaft 41 to start a power generation. At the same time, the wind strikes a direction adjusting vane 57 to move the shielding part main body 51 so that the shielding plates 55 are positioned on the upstream side from the vanes 42f to 42h. Thus, the wind W is stuck only on those vanes producing the rotating force of the rotating shaft 41, i.e., those vanes 42b to 42d moving along the forward movement direction of the wind W. On the other hand, because the wind W does not strike on the vanes 42f to 42h in the direction reverse to that of the wind due to a presence of the shielding plates 55, the cause of reducing the rotating force can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a vertical wind power generator, and more particularly to a structure having improved efficiency.

[0002]

2. Description of the Related Art Power generation using wind energy is a typical form of natural energy utilization along with solar power generation. In order to use wind power for power generation, it is necessary to investigate the wind conditions and select an appropriate site based on it.However, if a site suitable for power generation is selected, power generation can only be performed during daylight hours. It is more effective as a power generator than a solar power generator that cannot. For this reason, many wind power generators are installed in areas suitable for wind power generation.

There are a plurality of types of wind turbines in this wind power generator, depending on the shape of the blades, such as a Darius type in which two arcuate blades are vertically combined, a propeller type, and a type around a vertical rotation axis. Savonius type with curved wings,
Similarly, there is a cross-flow type in which a plurality of blades are attached around a vertical rotation axis.

[0004] On the other hand, the response characteristics of these wind turbines to the supplied wind speed are different, and when viewed from the relationship between the supplied wind speed and the blade peripheral speed, the wind speed ratio is large in the Darrieus type and the propeller type. In the Savonius type and the cross flow type, the wind speed ratio is small. That is, the former is often used at high-speed rotation, and the latter is often used at low-speed rotation. However, since the low-speed rotation type has a large torque,
It can be said that it is suitable for applications such as power generation even at low wind speeds. That is, the former is used at a wind speed of 5 m / sec or more, whereas the latter is capable of generating power even at a wind speed of 3 m / sec.

[0005] On the basis of such operating characteristics, a large-scale power supply equipment requires selection of an appropriate site based on the results of wind condition surveys,
Propeller-type wind turbines suitable for power generation at wind speeds of m / sec or more are relatively frequently used. However, this propeller-type wind turbine has a few blades because it has only two or three blades, and furthermore, it is necessary to control the wind direction and adjust the rotation speed of the propeller shaft at high wind speed. There is.

On the other hand, in recent years, with the growing interest in effective use of energy, attempts have been made not only to use such large-scale power generators for electric power but also to use low-speed wind obtained in general urban areas. Actively being done.
For such power generation by wind in a low-speed region, a vertical type turbine among the types of wind turbines described above is suitable, and a Savonius type or a cross flow type is applied. This type of windmill is different from a propeller type in that there are no problems with direction control or rotation speed adjustment with respect to the wind, but half of the wind receiving surface is a source of rotational force, while the other half goes upwind. For,
There was a problem that it worked to suppress rotation. Therefore, as a generator using low-speed wind,
Improvement of efficiency by solving such a point has been demanded.

Therefore, as shown in FIG. 4, a wind guide for guiding the wind W around a blade 12 provided on a rotating shaft 11 in a vertical wind turbine 10 has been hitherto mainly for improving the efficiency. It has been proposed to arrange the plate 13. Thereby, the wind W can be converged, but the problem of the above-described rotation suppressing effect on half (or slightly less) of the wind receiving surface still remains.

[0008]

The above-described conventional vertical cylindrical wind power generator has the following problems. That is, unlike a propeller type windmill, it is sufficiently suitable for wind power generation even in a low wind speed region, and has applicability as a small windmill in an urban area. However, when the windmill rotates by receiving the energy of the wind, the blade moves toward the windward on half of the rotating wind receiving surface, so that it works to reduce the rotating force and improve the energy conversion efficiency. Was an obstacle.

Therefore, the present invention can solve the problems of the vertical type wind power generator as described above, can solve such a rotation suppressing action, and can use a high-speed wind power generator that can be used even in an urban area. It is an object of the present invention to provide a small and efficient wind power generator.

[0010]

Means for Solving the Problems In order to solve the above problems and achieve the object, a wind power generator of the present invention is configured as follows.

(1) A rotating shaft arranged substantially orthogonal to the traveling direction of the wind, a blade provided on the rotating shaft and receiving the wind to apply a rotating force to the rotating shaft, And a shielding unit for preventing the flow of the wind to the blade moving in a direction opposite to the traveling direction of the wind, and a direction adjusting unit for positioning the shielding unit based on the traveling direction of the wind. It is characterized by having.

(2) In the wind power generator according to the above (1), the shielding portion is formed in a shape for guiding the wind to the blades moving along the traveling direction of the wind. It is characterized by the following.

[0013] As a result of taking the above measures, the following effects occur.

(1) By preventing the wind from flowing into the blade moving in the direction opposite to the direction of the wind by the shielding portion, it is possible to prevent the rotation force of the rotating shaft from being weakened and to increase the rotation efficiency. be able to. In addition, it is possible to always move the shielding portion to the windward side in response to a change in the wind direction.

(2) It is possible to further improve the efficiency by guiding the wind hitting the shielding portion to the blade.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1A and 1B show a vertical wind power generator 20 according to a first embodiment of the present invention, and FIG. Shield part 5
FIG.

The wind power generator 20 includes a support portion 30, a vertical cylindrical windmill portion 40, and a shielding portion 50. The support 30 includes a pedestal 31 and a generator 32 provided in the pedestal 31.

The windmill section 40 is rotatably supported by the pedestal 31, and is disposed along a rotating shaft 41 connected to the input shaft of the generator 32 and a circumferential direction of the rotating shaft 41. A plurality of blades 42a to 42h are provided. The rotation shaft 41 is disposed substantially perpendicular to the traveling direction of the wind W. The blades 42a to 42 in FIG.
h indicates a position in the circumferential direction.

The shielding section 50 includes a shielding section main body 51 rotatably supported on the pedestal 31 and the rotating shaft 41. The shielding section main body 51 includes an annular supporting section 52 and a disk-shaped supporting section 53, a column section 54 connecting the supporting sections 52 and 53, and a shielding plate 55 arranged to face the column section 54. ing. The shielding plate 55 has a function of preventing the wind W from flowing into the blades 42f to 42h moving in the direction opposite to the traveling direction of the wind W.

The supporting portion 52 has an adjusting blade supporting portion 56.
The direction adjusting blade 57 is attached to the adjusting blade support portion 56. In addition, with the change of the wind direction, the shielding portion 50 is rotated by the action of the direction adjusting blade 57, and the shielding plate 55 always moves to the windward side of the blades 42f to 42h.

The shielding plate 55 may be provided at a half of the circle. However, it is possible to prevent the weight of the shielding portion 50 from increasing and to prevent the wind W passing through the blades 42b to 42d from passing therethrough.
It is preferable that the shielding plate 55 is provided only in a quarter of the circle so as not to obstruct the flow of the air. Further, the shield plate 55 is a shield for preventing the wind from being applied to the blades 42f to 42h, which move in the direction opposite to the wind traveling direction, of the blades 42a to 42h, and therefore has a sufficient function.

In the wind power generator 20 configured as described above, the wind hits the blades 42 b to 42 d, so that a rotational force is applied to the rotating shaft 41, and the generator 32 operates to start power generation at a low speed. At the same time, the wind is directional
7, the shield unit main body 51 is rotated so that the shield plate 55 is positioned on the windward side of the blades 42f to 42h.

As a result, of the blades 42a to 42h,
The wind W hits only the blades that generate the rotational force of the rotating shaft 41, that is, the blades 42b to 42d that move along the traveling direction of the wind W. On the other hand, the wind W does not hit the blades 42f to 42h in the direction opposite to the wind traveling direction due to the shielding plate 55. For this reason, it is possible to eliminate the factor of reducing the rotational force while having the feature of the vertical wind power generation device in which power generation starts with low-speed wind.

A stainless steel shield plate 55 was installed on a Savonius type windmill (rotational diameter: 1.5 m, rated output: 1 kW), and the power generation output was determined at a wind speed of 4 m / sec. As a result, compared with the case where the shielding plate 55 is not installed, 5 to 10
% Could be improved.

FIGS. 3A and 3B show a wind power generator 60 according to a second embodiment of the present invention. In this figure, the same functional parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.

The wind power generator 60 comprises a support section 30, a vertical cylindrical windmill section 40, and a shielding section 70. The support 30 includes a pedestal 31 and a generator 32 provided in the pedestal 31.

The wind turbine unit 40 is rotatably supported by the pedestal 31, and is disposed along a rotation shaft 41 connected to the input shaft of the generator 32 and a circumferential direction of the rotation shaft 41. And a plurality of blades 42.

The shielding section 70 includes a pedestal 31 and a shielding section main body 71 rotatably supported on the rotating shaft 41. The shielding portion main body 71 includes an annular supporting portion 72 and a disk-shaped supporting portion 73, a wind guiding portion 74 connecting the supporting portions 72 and 73, and a shielding plate 7 disposed to face the wind guiding portion 74.
5 is provided. The air guide 74 is formed in such a shape as to introduce wind into the windmill 40. Further, the shielding plate 75
Is a blade 42 moving in a direction opposite to the traveling direction of the wind W.
It has a function of preventing the wind W from flowing into the f-42h and introducing the wind W striking the shielding plate 75 to the blades 42b to 42d moving along the traveling direction of the wind W.

The supporting portion 72 has an adjusting blade supporting portion 76.
The direction adjusting blade 77 is attached to the adjusting blade support portion 76. In addition, with the change of the wind direction, the shielding portion 70 is rotated by the action of the direction adjusting blade 77, and the shielding plate 75 always moves to the windward side of the rotating shaft 71. In addition, since the energy of the wind W acting on the shielding plate 75 is large, the direction adjusting blade 77 has a size
Select the shape.

In the wind power generator 60 configured as described above, when the wind hits the blades 42 b to 42 d, a rotational force is applied to the rotating shaft 41, and the generator 32 operates to start power generation at a low speed. At the same time, the wind W hits the direction adjusting blades 77 and rotates the shielding unit main body 71 so that the shielding plate 75 is located on the windward side with respect to the rotation shaft 41.

As a result, of the blades 42a to 42h,
The wind W is generated only on the blades that generate the rotational force of the rotating shaft 41, that is, only on the blades 42b to 42d that move along the traveling direction of the wind.
Will be hit. On the other hand, the wind W does not hit the blades 42f to 42h that are opposite to the traveling direction of the wind W. For this reason, it is possible to eliminate the factor of reducing the rotational force while having the feature of the vertical wind power generation device in which power generation starts with low-speed wind.

As described above, according to the wind power generator 60 according to the second embodiment, the wind power generator 20 described above is used.
The same effect can be obtained. Furthermore, in the wind power generator 60, the energy of the wind W that has hit the shielding plate 75 is
By introducing 0, more efficient power generation becomes possible.

A shield plate 75 made of a glass fiber reinforced plastic material is installed on the above-mentioned Savonius type windmill, and the wind speed is 4 m.
The power generation output was determined at / sec. As a result, it was possible to improve about 50% as compared with the case where the shielding plate 75 was not installed.

The present invention is not limited to the above embodiment. That is, in the above-described wind power generator, the Savonius type is described. However, regardless of the shape of the wind turbine blades such as the cross flow type, the wind power generator is a vertical type, and a part of the wind receiving surface hits the wind and a part of the rotational force. Can be applied to a wind power generator in which the power generation is reduced. In addition, it goes without saying that various modifications can be made without departing from the spirit of the present invention.

[0035]

According to the present invention, it is possible to prevent the rotational force of the rotating shaft from being weakened by preventing the wind from flowing into the blade moving in the direction opposite to the direction of the wind by the shielding portion. , The rotation efficiency can be increased. In addition, it is possible to always move the shielding portion to the windward side in response to a change in the wind direction.

[Brief description of the drawings]

FIG. 1 is a view showing a vertical wind turbine generator according to a first embodiment of the present invention, wherein (a) is a top view and (b) is a front view.

FIG. 2 is a perspective view showing a wind guide plate incorporated in the vertical wind power generator.

FIGS. 3A and 3B are views showing a vertical wind turbine generator according to a second embodiment of the present invention, wherein FIG. 3A is a top view and FIG. 3B is a perspective view.

FIG. 4 is an explanatory view showing a conventional vertical wind power generator.

[Explanation of symbols]

 20, 60 ... wind power generator 30 ... support part 40 ... windmill part 50, 70 ... shielding part 55, 75 ... shielding plate 57, 77 ... direction adjustment blade W ... wind

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Seiichi Muroyama 3-4-1 Shibaura, Minato-ku, Tokyo F-Term in NTT Facilities, Inc. (reference) 3H078 AA05 AA26 BB11 CC22 CC44 CC53 CC68

Claims (2)

[Claims] A rotary shaft disposed substantially orthogonal to a traveling direction of a wind; a blade provided on the rotary shaft to apply a rotational force to the rotary shaft by receiving the wind; A shielding portion for preventing the flow of the wind into the blade moving in a direction opposite to the traveling direction of the wind, and a direction adjusting portion for positioning the shielding portion based on the traveling direction of the wind. A wind power generator. 2. The wind power generator according to claim 1, wherein the shielding portion is formed in a shape for guiding the wind to the blade moving along the traveling direction of the wind.