JP2000064941A - Wind power generation set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit easy transport of a blade to the field and to improve strength of the blade. SOLUTION: In a wind power generation set which is so constituted that a plurality of supports 4 are provided on a rotation shaft 3 connected to a generator 2 so as to radially protrude therefrom, and a blade 5 is mounted on each support 4, whereby a windmill made up of the plurality of blades 5 receives wind to rotate the rotation shaft 3, thereby driving the generator 2, a plurality of blades 5 each are divided into more than one parts in the longitudinal direction thereof at specified intervals, and on both ends of thus divided blades 5a-5c are fixed straightening plates 7a-7c, so that adjacent divided blades 5a-5c are detachably connected with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wind turbine type wind power generator.

[0002]

2. Description of the Related Art FIG. 8 shows an example of a conventional wind power generator of this type. This is the generator 2 on the base 1
A plurality of struts 4 are radially protruded from the rotating shaft 3 connected to the shaft, and a blade 5 is attached to each of the struts 4.
The wind turbine including the plurality of blades 5 receives the wind to rotate the rotating shaft 3, thereby driving the generator 2.

The power generation capacity of this wind power generator is 8 in Europe and the United States.
00kw-1000kw, 400kw-500k in our country
w is the mainstream, the diameter R of the wind turbine rotor exceeds 40 m, and it is expected that the diameter R will be even longer.

[0004]

In the above-mentioned conventional configuration,
A wind power generator is constructed by manufacturing a plurality of integrated blades 5 at a factory, transporting them to the site, and attaching them to the columns 4, and the length H of the blades 5 is usually 20.
m, while the length that can be transported is limited to 25 m or less (including vehicles) under the Road Traffic Act of Japan. Is troublesome and troublesome, and the length H of the blade 5 will be increased in the future.
To build larger wind turbines with longer
This will hinder its construction.

Further, it is difficult to increase the strength of the integral blade 5 structurally, and it is necessary to endure an excessive bending stress applied thereto and an excessive tensile stress due to centrifugal force generated when the blade is rotated. However, there is a limit in increasing the size.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a wind power generator capable of easily transporting a blade to a site and increasing the strength of the blade.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, a plurality of columns are radially projected from a rotating shaft connected to a generator, and a blade is attached to each column. In the wind turbine generator that drives the generator by receiving the wind with a windmill consisting of the plurality of blades and rotating the rotating shaft,
The plurality of blades are divided into a plurality at predetermined intervals in the longitudinal direction, and adjacent ones of the plurality of divided blades are detachably connected to each other.

According to the above construction, a plurality of divided blades are preliminarily manufactured in a factory, transported to the site and connected to each of the divided blades, thereby assembling the blades. Since the blade is disassembled into small pieces and transported, the transport is easy, and a large wind power generator using a long blade of 20 m or more can be easily constructed.

According to a second aspect of the present invention, in the first aspect of the present invention, an outer peripheral surface of a blade fitting portion of the column is formed in a polygonal shape, and a polygonal through hole of each divided blade is formed in the blade fitting portion. Are fitted.

[0010] According to the above configuration, each of the divided blades can be integrally attached to the column only by fitting the polygonal through hole of each divided blade to the polygonal blade fitting portion of the column.

[0011] The invention according to claim 3 is the invention according to claim 1 or 2.
In the above invention, the plurality of divided blades are formed in a hollow shape. According to the above configuration, the plurality of divided blades are formed in a hollow shape,
Since the weight of the windmill is reduced, the windmill can be easily rotated.

According to a fourth aspect of the present invention, in the first aspect of the present invention, straightening plates are fixed to both end portions of the plurality of divided blades, and both opposing divided blades are opposed to each other. A recess is formed in one of the straightening plates, and the other straightening plate is fitted in the recess.

According to the above configuration, two-dimensional flows are formed by the flow straightening plates fixed to both ends of the plurality of divided blades, so that aerodynamic characteristics can be improved and power generation efficiency can be increased. Also, of the two current plates facing each other,
By fitting the other rectifying plate into the recess formed in one of the rectifying plates, the adjacent divided blades are firmly connected to each other, so that a blade having high strength can be formed.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the plurality of divided blades are rotatably fitted to the column independently of each other, and are provided on a gear portion formed on each of the divided blades. A meshing pinion is incorporated in the support, and by rotating the pinion forward and reverse, each of the divided blades is rotated about the support via a gear portion. .

According to the above configuration, by rotating the pinion meshing with the gear portion formed on each of the divided blades in the forward and reverse directions, the inclination angle of each of the divided blades is set as desired in accordance with the wind speed, and the power generation efficiency is improved. Can be given.

According to a sixth aspect of the present invention, in the fifth aspect of the invention, the plurality of divided blades are rotatably fitted to a guide cylinder having a rectifying plate fixed to both ends, respectively. A guide tube with a fitting is externally fitted to the column.

According to the above configuration, since the guide cylinder having the rectifying plates fixed to both ends and the divided blade are integrated,
The variable-pitch type blade can be easily assembled by externally fitting the integrated plurality of guide cylinders with divided blades to the column.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a wind power generator according to an embodiment of the present invention, in which a plurality of blades attached to a plurality (three in this embodiment) of columns 4 projecting radially from a rotating shaft 3. 5 are divided into a plurality (three in this embodiment) at predetermined intervals in the longitudinal direction, and straightening plates 7a to 7f are fixed to both ends of each of the divided blades 5a to 5c. In the configuration other than the above, the same parts as those of the conventional example shown in FIG.

As shown in FIGS. 2 and 3, the support column 4 is formed of a hollow pipe such as a light-weight and high-strength steel pipe or the like, and a blade fitting whose outer peripheral surface is formed in a polygonal shape such as a hexagon. A portion 4a, a large-diameter base portion 4b integrally formed at the base end of the blade fitting portion 4a, and a male screw portion 4c integrally projecting from the tip of the blade fitting portion 4a. A fastening member 8 such as a cap nut is screwed into the nut.

Each of the divided blades 5a to 5c is shown in FIG.
As shown in FIG. 4, a blade body 9 formed of a lightweight metal such as reinforced plastic or aluminum, which is lightweight and strong, is hollow, and has a streamlined almond-shaped cross section. 9 comprises a pair of end plate portions 10 provided at both ends thereof, and a central tubular portion 11 disposed in the blade body 9 and having both ends connected to the both end plate portions 10. By fitting the hole 11 a into the blade fitting portion 4 a of the support column 4, each divided blade 5
a to 5c can be integrally attached to the support 4.

As shown in FIG. 3, each of the divided blades 5
The inclination angles α1 to α3 of the blades a to 5c are set so that the blades 5 have a suitable pitch angle from the base end [FIG. 3C] to the tip end [FIG. I am able to receive it. Also, each divided blade 5a
The widths D1 to D3 of the blades 5 to 5c are gradually increased from the distal end to the proximal end of the blade 5 to form the blade 5 having high strength.

Each of the straightening plates 7a to 7f is made of a lightweight metal such as reinforced plastic or aluminum having a high strength, and is formed in a rectangular shape.
0, and a two-dimensional flow is formed at these divided portions in each of the divided blades 5a to 5c, so that aerodynamic characteristics are improved.

Further, concave portions 12 are formed on the outer surfaces of the rectifying plates 7c and 7e fixed to the central dividing blade 5b, and the rectifying plates 7b and 7e of the leading and proximal dividing blades 5a and 5c are fitted into the respective concave portions 12. As a result, the divided blades 5a to 5c are firmly connected to form the blade 5 having high strength.

In the above configuration, the procedure of assembling the windmill will be described. The divided blade 5a with the rectifying plates 7a to 7f
5c is manufactured at a factory, transported to the site, the through holes 11a of the divided blades 5a to 5c are fitted into the blade fitting portions 4a of the columns 4, and the fastening tools 8 are attached to the male screw portions 4c. What is necessary is just to screw. Thereby, each of the divided blades 5a to 5c can be sandwiched between the fastening tool 8 and the large-diameter base end 4b of the column 4, and the blade 5 can be firmly attached to each column 4.

In this case, since the blade 5 is disassembled and transported from the factory to the site, it is easy to transport.
A large wind power generator using a long blade 5 of 20 m or more can be easily constructed.

FIGS. 5 to 7 show a wind power generator according to another embodiment of the present invention, in which a guide cylinder having a plurality of divided blades 5a to 5c fixed to rectifying plates 7a to 7f at both ends, respectively. 14 is rotatably fitted to the outer periphery of the guide cylinder 14 having a plurality of divided blades 5a to 5c.
And the central cylindrical portion 11 of each of the divided blades 5a to 5c.
A gear portion 15 is formed on the inner peripheral surface of the support member 4 by a predetermined angle β, and a pinion 18 meshing with each gear portion 15 passes through the blade fitting portion 4a of the support column 4 and the openings 16 and 17 formed in the guide cylinder 14. The support shaft 18a of each pinion 18 is interlocked and connected to a blade angle adjusting device 20 in the rotary shaft 3. Incidentally, reference numeral 19 denotes each divided blade 5a.
5c are provided between the center tube portion 11 and the guide tube 14 and between the end plate portions 10 of the divided blades 5a to 5c and the rectifying plates 7a to 7f. Configurations other than the above are shown in FIGS.
Since this embodiment is almost the same as the embodiment shown in FIG. 4, the same portions are denoted by the same reference numerals and the description thereof will be omitted.

According to the above configuration, by rotating each pinion 18 in the forward and reverse directions by each blade angle adjusting device 20, the inclination angle of each of the divided blades 5a to 5c is adjusted as desired according to the wind speed via the gear portion 15. By setting (see the phantom line in FIG. 6), the power generation efficiency can be increased. Further, the variable-pitch type blade can be easily assembled only by externally fitting the guide cylinder 14 with the plurality of divided blades 5a to 5c to the column 4.

In the other embodiment described above, each of the divided blades 5a to 5c of each blade 5 is operated by the plurality of blade angle adjusting devices 20, but one blade angle adjusting device 20 controls each of the blades 5. Each of the split blades 5a to 5c may be operated.

[0029]

According to the first aspect of the present invention, a plurality of divided blades are manufactured in advance in a factory, transported to the site and connected to each of the divided blades, thereby assembling the blades. In addition, since the blades are disassembled and transported from the factory to the site, the transport is easy, and a large-scale wind power generator using a long blade of 20 m or more can be easily constructed.

According to the second aspect of the present invention, each of the divided blades can be integrally attached to the column only by fitting the polygonal through hole of each divided blade to the polygonal blade fitting portion of the column. it can.

According to the third aspect of the present invention, since the plurality of divided blades are formed in a hollow shape and the weight of the windmill is reduced, the windmill can be easily rotated. According to the fourth aspect of the present invention, a high aerodynamic characteristic is obtained in each of the divided blades so that a two-dimensional flow is formed in the divided portion of the current plate fixed to both ends of the plurality of divided blades, thereby increasing the power generation efficiency. be able to. Further, by fitting the other rectifying plate into the recess formed in one of the rectifying plates facing each other, the adjacent divided blades are firmly connected to each other, so that the blade having high strength is provided. Can be formed.

According to the fifth aspect of the present invention, by rotating the pinion meshing with the gear portion formed on each of the divided blades forward and reverse, the inclination angle of each divided blade is set as desired in accordance with the wind speed. Power generation efficiency.

According to the sixth aspect of the present invention, since the guide cylinder having the straightening plates fixed to both ends and the divided blade are integrated, the integrated plurality of guide cylinders with the divided blades are externally fitted to the column. Thus, the variable pitch type blade can be easily assembled.

[Brief description of the drawings]

FIG. 1 is a front view of a wind turbine generator according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the main part.

3A is a view taken in the direction of arrows AA in FIG. 2, and FIG.
FIG. 3C is a view as seen from the arrow BB, and FIG. 3C is a view as seen from the arrow CC in FIG. 2.

FIG. 4 is an exploded vertical sectional view of the blade.

FIG. 5 is a front view of a main part of a wind turbine generator according to another embodiment of the present invention.

FIG. 6 is a view as viewed in the direction of the arrow DD in FIG. 5;

FIG. 7 is an exploded vertical sectional view of the blade.

FIG. 8 is a front view showing a conventional example.

[Explanation of symbols]

 Reference Signs List 2 Generator 3 Rotary shaft 4 Support 4a Blade fitting part of support 5 Blade 5a-5c Dividing blade 7a-7f Rectifying plate 11a Polygonal through hole of dividing blade 12 Depression 14 Guide cylinder 15 Gear part 18 Pinion

Claims (6)

[Claims] 1. A plurality of columns are radially protruded from a rotating shaft connected to a generator, and a blade is attached to each of the columns, and a windmill including the plurality of blades receives the wind to rotate the rotating shaft. By rotating, in the wind turbine generator that drives the generator, the plurality of blades are divided into a plurality at predetermined intervals in the longitudinal direction, and adjacent ones of the plurality of divided blades are detachable from each other. A wind power generator, which is connected to a wind power generator. 2. An outer peripheral surface of a blade fitting portion of said support post is formed in a polygonal shape, and a polygonal through hole of each divided blade is fitted into said blade fitting portion. 2. The wind power generator according to 1. 3. The wind power generator according to claim 1, wherein the plurality of divided blades are formed in a hollow shape. 4. A rectifying plate is fixed to both ends of the plurality of divided blades, a recess is formed in one of the rectifying plates facing each other between adjacent divided blades, and the other rectifying plate is formed. The wind power generator according to any one of claims 1 to 3, wherein a plate is fitted in the recess. 5. A plurality of divided blades are rotatably fitted to the column independently of each other, and a pinion that meshes with a gear portion formed on each of the divided blades is incorporated in the column. The wind power generator according to claim 1, wherein each of the divided blades is rotated about the support column through a gear portion by rotating the pinion forward and backward. 6. A plurality of divided blades are rotatably fitted to guide tubes each having a rectifying plate fixed to both ends thereof, and the plurality of divided blade guide tubes are fitted to the columns. The wind power generator according to claim 5, wherein