WO2011058970A1

WO2011058970A1 - Wind-driven electric power-generating device

Info

Publication number: WO2011058970A1
Application number: PCT/JP2010/069935
Authority: WO
Inventors: 岡　浩章; 斉彰岡
Original assignee: 産機電業株式会社
Priority date: 2009-11-12
Filing date: 2010-11-09
Publication date: 2011-05-19
Also published as: JP2011106272A

Abstract

A wind-driven electric power-generating device which can provide a substantially constant electric power generation output in a wide wind speed range from low wind speed to high wind speed, which can prevent the wind wheel from being damaged by a strong wind of typhoon force, and which is small-sized and compact. A wind-driven electric power-generating device is provided with a rotating shaft (5) provided to the axis of a wind wheel-rotating body (1); fixed-wing-like blade-supporting bodies (2) extending in a radial pattern from the wind wheel-rotating body; blade-rotating shafts (3) rotatably supported by protrusions (2a) of the fixed-wing-like blade-supporting bodies (2); and blades (4) which rotate in a hinge-like manner relative to the fixed-wing-like blade-supporting bodies about the blade-rotating shafts. Cams (16) are each fixed to an end of each blade-rotating shaft. The cams, which correspond to the blades, make contact with a single cam receiver (17). A spring (18), one end of which is fixed, is provided around the rotating shaft. The cams are rotated in response to the state of compression of the spring, and this rotates the blades with the blades held at the same angle.

Description

Wind power generator

The present invention relates to a wind turbine generator, and more particularly, to a wind turbine generator including a windmill that can automatically adjust the rotation angle of blades and make the power generation output substantially constant in response to wind power.

Conventionally, wind power generators have been widely used in practice, but in a typical example, a wind turbine having blades having a narrow width and a long radius is used, and therefore, the height of a pole supporting the wind turbine is high. And a large installation area is required. In these wind power generators, if the wind power is weak, the power generation output is low, and if the wind power is strong, the power generation output is high, but if the wind power is further strong, the windmill may be damaged.

In order to solve such a problem, a wind turbine generator has been proposed in which a blade is fixed to a rotating shaft and a spring force corresponding to the rotation of the rotating shaft (that is, rotation of the blade) is applied (Japanese Patent Laid-Open No. 2002-2002). -130109, JP-A-2002-70718, etc.). According to such a wind power generator, it is described that a rotational force can be obtained even with a light breeze and a load caused by an excessive wind pressure such as a typhoon or a gust can be reduced to be used in a safe and stable state.

However, the technique described in the above publication has a problem that damage is likely to occur under strong winds because the rotating shaft supporting the blades is fixed only at the root part of the impeller. In addition, since a spring is provided for each blade, there is a problem that the number of components is large and the apparatus must be enlarged.

The present invention has been made on the basis of the above-described circumstances, and can provide a substantially constant and stable power output in a wide range of wind speeds ranging from weak winds to strong winds, and reliably wind turbines even under strong typhoon winds. It is an object of the present invention to provide a wind turbine generator that can prevent damage to the wind turbine and that is reduced in size and size and reduced in size.

A wind turbine generator according to the present invention includes a rotating shaft provided on an axis of a windmill rotor, a fixed wing-like blade support extending radially from the windmill rotor, and a protrusion of the fixed wing-like blade support. A blade rotation shaft supported freely, and a blade rotating in a hinged manner with respect to the fixed wing-shaped blade support, with the blade rotation shaft as an axis, and at the shaft end of the blade rotation shaft, A cam is fixed, a plurality of the cams corresponding to a plurality of blades are in contact with one cam receiver, and a spring having one end fixed around the rotation shaft is provided, and the other end of the spring is the cam receiver The cam receiver is movable along the rotation shaft, and the cam receiver moves in the axial direction corresponding to the compression state of the spring, thereby rotating the plurality of cams. The plurality of blades are rotated at the same angle.

According to the present invention, the fixed wing-shaped blade support that extends radially from the windmill rotor is provided, and the movable wing-shaped blade rotates in a hinged manner with respect to the fixed wing-shaped blade support with the blade rotation axis as an axis. The blade rotation shaft is supported in a hinge-like manner on the protruding portion of the fixed wing-like blade support, which can reliably prevent damage to the windmill even under strong typhoon winds. A spring is provided around the rotation shaft, the spring is fixed to the cam receiver, and the cam receiver moves in the axial direction corresponding to the compression state of the spring, thereby being fixed to the plurality of blade rotation shaft ends. The cams are rotated and the blades are rotated at the same angle. With a simple mechanism that reduces the number of parts and reduces the size and size, power can be generated at a substantially constant rotational speed from low to high winds. Output is obtained.

FIG. 1 is a front view of a wind turbine generator according to an embodiment of the present invention. FIG. 2 is a side view of the apparatus. FIG. 3A is a diagram illustrating a configuration example of a blade support, a blade rotation shaft, a blade, and a cam. 3B is a cross-sectional view showing an example of a cam shape along the line BB in FIG. 3A. FIG. 3C is a cross-sectional view illustrating an example of a blade shape along the CC line in FIG. 3A. FIG. 4 is a cross-sectional view showing a configuration example inside the windmill rotor. FIG. 5 is a diagram illustrating an example of the cam operation in a light wind state. FIG. 6 is a diagram showing an example of cam operation in a strong wind state.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In addition, in each figure, the same code | symbol is attached | subjected and demonstrated to the same or equivalent member or element.

1 and 2 show an outline of this wind power generator. The windmill is supported by the windmill rotating body 1 corresponding to the hub, the blade support 2 that is fixed to the windmill rotating body, and that corresponds to the struts extending radially from the windmill rotating body, and is rotatably supported by the blade support. A blade rotation shaft 3 and a blade 4 fixed to the blade rotation shaft are provided. The axis of the windmill rotating body 1 is provided with a rotating shaft 5, and the blade 4 receives wind power and the windmill rotating body 1 rotates, so that the rotational force is transmitted to the rotating shaft 7 via the

gears

6a and 6b. Further, power is generated by inputting to the generator 9 via the

speed increasing gears

8a, 8b, 8c.

Bearings

12a and 12b are provided inside the windmill fixed body 11 that rotatably supports the windmill, and the rotating shaft 5 is supported. The windmill fixed body 11 is supported by a swivel bearing 14 provided on the base 13 and is rotatable in a horizontal plane. The fixed wing-like blade support 2 is disposed in parallel along the rotation axis 5. As a result, the windmill automatically faces the wind direction.

In the wind turbine generator of the present invention, as shown in FIG. 3A, a fixed wing-shaped blade as a solid support fixed to the windmill rotating body 1 and formed of aluminum, carbon fiber or the like extending radially from the windmill rotating body. A support 2 is provided. The blade support 2 is provided with a protrusion 2 a including a cylindrical portion intermittently along the axial direction of the blade rotation shaft 3. Similarly, the blade 4 is provided with a protruding portion 4a including a cylindrical portion intermittently along the axial direction of the blade rotating shaft 3, and the protruding portion 2a and the protruding portion 4a are engaged with each other so that the blade rotating shaft 3 is located inside the cylindrical portion. The blade 4 is inserted and fixed to the blade rotation shaft 3, and the blade rotation shaft 3 is rotatably supported in the cylindrical portion of the protrusion 2 a of the blade support 2. As a result, the blade 4 rotates in a hinged manner with respect to the columnar blade support 2 with the blade rotation shaft 3 as an axis. In addition, the blade | wing 4 is formed wide by aluminum or carbon fiber, and has the intensity | strength which is not damaged even in a strong wind, and the shape from which sufficient electric power output is obtained even in a weak wind state.

As shown in FIG. 3B, a cam 16 whose distance from the rotation center to the outer periphery changes according to the angle is fixed to the shaft end inside the wind turbine rotor 1 of the blade rotation shaft 5. Therefore, when the cam 16 rotates with the blade rotation shaft 3 as the axis, the blade 4 rotates around the blade rotation shaft 3 as shown in FIG. 3C.

FIG. 4 shows the inside of the windmill rotating body 1 and the windmill fixed body 11. As described above, the rotating shaft 5 is fixed to the axis of the windmill rotating body 1, and the rotating shaft 5 is rotatably supported by the

bearings

12 a and 12 b provided on the windmill fixed body 11. A cam 16 is fixed to the shaft end of the blade rotating shaft 3 inserted through the windmill rotor 1, one point on the outer periphery of the cam 16 contacts the cam receiver 17, and the cam receiver 17 includes a cylindrical portion 17a. It fits into the cylindrical portion 1a of the body 1 and is movable along the rotation axis 5 in the axial direction.

The windmill rotating body 1 includes a plurality of sets of blade supports 2, blade rotating shafts 3 and blades 4, and cams 16 are fixed to the shaft ends of the blade rotating shafts 3. Accordingly, when the plurality of cams 16 come into contact with one cam receiver 17 and the cam receiver 17 moves in the axial direction, the plurality of cams 16 can be rotated simultaneously, and the plurality of blades 4 can be rotated at the same angle. it can.

The windmill rotating body 1 is provided with a spring 18 having one end fixed around the rotating shaft 5, and the other end of the spring 18 is fixed to a spring receiving plate 19 to be a free end. The spring receiving plate 19 is in contact with the cam receiver 17 in a state where the spring 18 is compressed, and applies the elastic force of the spring 18 to the cam receiver 17 that rotates together with the windmill rotating body 1. When the cam receiver 17 moves corresponding to the compression state of the spring 18, the cam 16 rotates, the blade rotating shaft 5 rotates, and the blade 4 rotates.

5 and 6 are diagrams showing the compressed state of the spring 18 and the rotating state of the blade 4, FIG. 5 shows a light wind state, and FIG. 6 shows a strong wind state. In the light wind state shown in FIG. 5, since the wind force received by the blade 4 is weak, the spring 18 is in a low compression state in which its elastic force balances with the wind force, and the surface of the blade 4 is perpendicular to the rotation axis 5 (wind direction). Get closer. On the other hand, in the strong wind state shown in FIG. 6, since the wind force received by the blade 4 is strong, the blade 4 receives the wind force, the blade rotating shaft 3 rotates, and the cam 16 fixed to the blade rotating shaft 3 rotates. When the cam receiver 17 is pressed, the spring 18 is in a highly compressed state in which the elastic force balances with the wind force, and the surface of the blade 4 becomes nearly parallel to the rotation shaft 5 (wind direction).

As described above, the wind power generator of the present invention includes the blade support as a support strut extending radially from the windmill rotating body. Therefore, when the wind force fluctuates, the blade 4 automatically rotates around the blade rotation shaft 3. Then, by rotating the cam 16, the compression state of the spring 18 can be changed, and the blade 4 can be held at the optimum rotation angle. Therefore, it is possible to generate power at a substantially constant rotational speed from a weak wind to a strong wind state with a simple mechanism without requiring control means such as hydraulic pressure, and a substantially constant power output can be obtained.

As shown in FIG. 1, by using wide blades, a power generation output can be obtained from a breeze state, a rated power generation output can be obtained at a wind speed of about several m / s, and a high power generation output can be obtained with a compact structure. It is done. And even if it becomes a stormy state, since a blade | wing is supported by the blade | wing support body which is a firm support | pillar, and the surface of a blade | wing becomes substantially parallel to a wind direction, damage to a windmill can be prevented.

Although one embodiment of the present invention has been described so far, it is needless to say that the present invention is not limited to the above-described embodiment, and may be implemented in various forms within the scope of the technical idea.

The present invention provides a wind power generator that can always obtain a substantially constant and stable power output in a wide range of wind speeds from weak winds to strong winds, and can be used in the field of wind power generation.

Claims

A rotating shaft provided on the axis of the wind turbine rotor,
A fixed wing-like blade support extending radially from the windmill rotor;
A blade rotation shaft rotatably supported by the protrusion of the fixed wing-shaped blade support;
A blade that rotates in a hinged manner with respect to the fixed wing-shaped blade support, with the blade rotation axis as an axis;
A cam is fixed to the shaft end of the blade rotation shaft, and the plurality of cams corresponding to the plurality of blades are in contact with one cam receiver,
A spring having one end fixed around the rotating shaft, the other end of the spring being fixed to the cam receiver, the cam receiver being movable along the rotating shaft,
A wind turbine generator that rotates the plurality of cams and rotates the plurality of blades at the same angle by moving the cam receiver in the axial direction corresponding to the compressed state of the spring.
The blade support is provided with a protrusion including a cylindrical portion intermittently along the axial direction of the blade rotation axis, and the blade includes a protrusion including a cylindrical portion intermittently along the axial direction of the blade rotation axis. The protrusion of the support and the protrusion of the blade are engaged with each other, the blade rotation shaft is inserted into the cylindrical portion, the blade is fixed to the blade rotation shaft, and the blade The wind turbine generator according to claim 1, wherein the rotating shaft is rotatably supported by a cylindrical portion of the protruding portion of the blade support.
The wind turbine generator according to claim 1, wherein the fixed wing-shaped blade support is arranged in parallel along the rotation axis.