JP2010084676A - Structure of blade for three blade type vertical shaft wind turbine device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a structure mode capable of improving the efficiency of the rotor of a three blade type vertical shaft wind turbine device and converting the rotational energy into a different energy. <P>SOLUTION: In order to efficiently use an energy of wind in the vertical direction of a conventional three blade type vertical shaft wind turbine device, the vertical direction of a blade is curved so as to be squeezed, so that the flow of wind in the vertical direction is smooth and contributes to the rotational force of the wind turbine device. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a structure that efficiently rotates a windmill device that is rotated by wind power and converts the rotational energy into other energy such as electric energy.

A general propeller-type windmill device has high theoretical efficiency, but there are problems such as the fact that the propeller must be directed to the windward and noise. The conventional drag type vertical axis wind turbine cannot theoretically achieve efficiency compared to the propeller type. The normal structure of a conventional drag type vertical axis wind turbine is shown in FIG. In the three-blade vertical axis wind turbine rotor, a horizontal upper plate 2 is arranged above the rotor rotating shaft 1 and a horizontal lower plate 3 is arranged below, and three vertical blades 4 connect them. The connection curve 5 between the blade 4 and the horizontal plate is an aerodynamically efficient curve. The rotor rotation shaft 1 is attached to the rotor holding column 7 and rotates in the rotor shaft rotation direction 6. However, the vertical cross-sectional shape is the same. FIG. 2 shows the shape and arrangement of the wing viewed from above. There are three blades A8, B9, and C10, and the wind 11 hitting the blade A8 hits the inner edge of the blade A8 to generate a force that pushes the blade A8. The wind 12 hitting the blade B9 is bent along the outer edge 2 of the blade B9 to generate a pushing force. As is clear from FIG. 2, the pushing force by the wind 11 hitting the blade A is pushed by the wind 12 hitting the blade B. Greater than power. This difference causes the windmill to rotate clockwise in FIG.
Patent No. 4117247

The conventional method only considers using the wind force in the horizontal direction. However, it was confirmed that the wind that entered the rotor of the windmill also flowed vertically. The present invention relates to a structure for further increasing the efficiency by utilizing this vertical wind force.

The blade shape of the three blades is also bent in the vertical direction to generate a rotational force from the force of the wind in the vertical direction. This method not only has a drag effect, but also has a propeller effect, thus improving efficiency.

  The three-blade vertical axis windmill device according to the present invention does not act on the wind direction, can obtain rotational energy more efficiently than wind power, and can be converted into other power and the like, and the effect is great.

A general embodiment of the present invention is shown in FIGS.

FIG. 3 shows a view of the blade of the wind turbine apparatus according to the present invention as viewed from above and a curve cut along the vertical section from the side. The horizontal wind 13 hits the blade curved surface 14 and generates a force 15 due to the horizontal wind, as in the conventional wind turbine. The wind 16 that bends in the vertical direction hits the blade curved surface 14 to produce a propeller effect, and generates a force 17 by the vertical wind. The curved surface in the vertical direction of the blade curved surface 14 is a curve in which air molecules bend smoothly, thereby preventing turbulence and improving efficiency.

For easier understanding, FIG. 4 shows one-third of the blade curved surface of the wind turbine device in three dimensions. The blade D18 has a three-dimensional curved surface that is squeezed at the top. The wind 19 entering the windmill horizontally hits the curved surface of the blade and is bent upward and rises. At this time, a force 20 for pressing the blade D18 is generated. This force is the combined force of the drag due to the horizontal component and the propeller effect due to the vertical component. This force generates a rotational force 22 around the windmill rotating shaft 21. The blade E23 and the blade F24 are the other two blades, and the effect is the same.

FIG. 5 is an overall view of the present invention based on an actual embodiment. The windmill rotates around the rotation shaft 25. The wind 26 that has invaded horizontally is divided into a wind 27 that escapes to the top of the windmill and a wind 28 that escapes to the bottom, and a rotation 29 is generated around the windmill rotating shaft 25. The relationship between the maximum diameter of the wind turbine, the tip system and the length is determined by the application and structure.

FIG. 6 shows an example of the curve of the vertical cross section of the blade for smoothly flowing the wind that passes vertically. The figure which looked at the windmill from the top and the vertical section curve of a braid | blade are shown. It is considered that a parabola with a gradually changing curvature is preferable for a curve for smoothly flowing the wind. When a vertical tangent line 32 is present at the central radius 31 in the cross section of the blade passing through the rotating shaft 30 of the windmill, and the angle 35 between the tangent line and the horizontal line is determined by the tip radius 34 at the height 33 of the windmill, a parabola 36 is uniquely determined. In general, the ratio between the center radius 31 and the tip radius 34 is preferably about 3 to 1, and the angle 35 between the tangent line and the horizontal line can be about 45 degrees at which the propeller effect is effective. The parabola 36 in FIG. 6 is a curve in which the blade is defined by a vertical section 39. The parabola that forms the actual blade is a part 38 of the parabola with the parabola axis 37. The central radius 31 varies with each vertical section 40 passing through the rotation axis 30. A series of parabolas in each vertical section determined in this way forms a three-dimensional curved surface of the blade in this embodiment.

In Example 1, since the blade has a complicated three-dimensional curved surface, it is expensive in the case of small-scale production. FIG. 7 shows Example 2 combined in a straight line as a simple method in the case of small-scale production.

A structural diagram of a conventional three-blade vertical axis wind turbine rotor is shown. It is the figure of the structure of the conventional 3 blade windmill rotor seen from the upper part. It is a top view of the windmill rotor of this invention. It is a three-dimensional figure of a part of blade of a windmill rotor of the present invention. It is a general view of the windmill rotor of this invention. (Example 1) It is sectional drawing of the example of the parabola of the windmill rotor blade of this invention. It is a linear type general view with the windmill rotor of this invention. (Example 2)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Windmill rotor rotating shaft 2 Horizontal upper board 3 Horizontal lower board 4 Blade 5 Connection curve 6 of a blade and a horizontal board 6 Rotor shaft rotation direction 7 Holding support | pillar 8 Blade A
9 Blade B
10 Blade C
11 Wind hitting blade A 12 Wind hitting blade B 13 Horizontal wind 14 Blade curved surface 15 Horizontal wind force 16 Vertically bending wind 17 Vertical wind force 18 Blade D
19 Wind coming in horizontally 20 Force to push blade D 21 Windmill rotating shaft 22 Rotating force 23 Blade E
24 Blade F
25 Rotating shaft 26 Wind that has entered horizontally 27 Wind that escapes to the top 28 Wind that exits to the bottom 29 Rotation 30 Windmill rotation shaft 31 Radius of the central part 32 Vertical tangent line 33 Windmill height 34 Tip radius 35 Angle of tangent line and horizontal line 36 Parabola 37 Parabolic axis 38 Part of parabola 39 Vertical section 40 Each vertical section

Claims (3)

        A vertical-axis type windmill device that rotates by wind power and converts the rotational energy into other energy, and uses the force of the wind that goes up and down to contribute to the rotational force, so it has a wing shape that narrows the vertical direction Windmill device.         A windmill device having a structure in which the diameter of the blade is narrowed in the vertical direction with the above structure, and in particular, the curvature is gradually changed to allow the wind to flow smoothly.         A wind turbine apparatus having a structure in which the diameter of the blade is narrowed in the vertical direction in the above-described structure and having a broken line structure instead of the curved line of claim 2

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