VERTICAL WIND SPEED ACCELERATION TYPE WIND TURBINE

Abstract

A wind turbine includes: a collector base; a tunnel body; and a wind turbine. The collector base has an entire circumference at which a wind inflow part is formed. The tunnel body includes a lower front member that is vertically installed on the collector base, that has a substantially rectangular cross-sectional shape, and whose cross-sectional area is reduced linearly or curvilinearly from a wind inlet formed on the collector base side, and an upper member that linearly or curvilinearly expands from a position of the reduced cross-sectional area to the wind outlet at an upper end. The wind turbine is installed at a reduced part of the tunnel body such that an interval between long side parts of the tunnel body is minimum, and a ratio of short side parts and the long side parts of the tunnel body is 1 to 10 times.

Claims

1. A vertical wind speed acceleration type wind turbine comprising: a wind collector base; a wind tunnel body; and a wind turbine, wherein the wind collector base has an entire circumference at which a wind inflow part is formed, the wind tunnel body includes a lower wind tunnel member that is vertically installed on the wind collector base, that has a substantially rectangular cross-sectional shape, and whose cross-sectional area is formed as a cross-sectional area reduced linearly or curvilinearly from a wind inlet formed on the wind collector base side, and an upper wind tunnel member that is formed so as to linearly or curvilinearly expand from a position of the reduced cross-sectional area to the wind outlet at an upper end, and the wind turbine is installed at a reduced part of the wind tunnel body such that an interval between long side parts of the wind tunnel body is minimum, and a ratio of a short side part and the long side parts of the wind tunnel body is 1 to 10 times.

2. The vertical wind speed acceleration type wind turbine according to claim 1, wherein the wind collector base has a periphery part of an upper surface at which a vane that guides collected wind to a center part of the wind collector base is provided.

3. The vertical wind speed acceleration type wind turbine according to claim 1, wherein the wind collector base has an outer circumference at which a rotating body that covers substantially half of the wind inflow part of the wind collector base is provided, and the rotating body has a substantially center part at which a weathervane that has a yaw function is provided.

4. The vertical wind speed acceleration wind turbine according to claim 1, wherein the upper wind tunnel member includes a rim of the wind outlet at which a wind dispersion part is formed.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0035] FIG. 1 is a schematic plan view of a vertical wind speed acceleration type wind turbine according to the present invention.

[0036] FIG. 2 is a front cross-sectional view of the vertical wind speed acceleration type wind turbine in FIG. 1.

[0037] FIG. 3 is a side cross-sectional view of the vertical wind speed acceleration type wind turbine in FIG. 1.

[0038] FIG. 4 is a side sectional view different from FIG. 3.

[0039] FIG. 5 is a plan view of a wind collector base having an upper surface on which vanes are provided.

[0040] FIG. 6 is a plan view of the wind collector base having the outer circumference at which a rotating body and a weathervane are provided.

[0041] FIG. 7 is a cross-sectional view taken along line A-A in FIG. 6.

[0042] FIG. 8 is a front cross-sectional view of a vertical wind speed acceleration type wind turbine illustrating another embodiment.

[0043] FIG. 9 is a plan view of a vertical wind speed acceleration type wind turbine illustrating the another embodiment.

[0044] FIG. 10 is a front cross-sectional view of the vertical wind speed acceleration type wind turbine in FIG. 9.

[0045] FIG. 11 is a front cross-sectional view of the vertical wind speed acceleration type wind turbine illustrating another embodiment.

[0046] FIG. 12 is a plan view of a guide in FIG. 11.

[0047] FIGS. 13A, 13B and 13C are front views illustrating examples of star-shaped dispersion parts.

[0048] FIG. 14 is a front view of a guard-shaped dispersion part.

[0049] FIG. 15 is a side view and a front view of a cutout protrusion dispersion part.

[0050] FIG. 16 is a front view of a gear-shaped dispersion part.

[0051] FIG. 17 is a front view for describing the size of the star-shaped dispersion part.

[0052] FIG. 18 is a front view and a side view of a rectangular dispersion part.

[0053] FIGS. 19A and 19B are experimental diagrams of wind turbine efficiency.

DESCRIPTION OF EMBODIMENTS

[0054] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0055] FIG. 1 is a schematic plan view of a vertical wind speed acceleration type wind turbine according to the present invention, FIG. 2 is a front cross-sectional view of FIG. 1, and FIG. 3 is a side cross-sectional view of FIG. 1.

[0056] FIGS. 1 to 3 illustrate a wind collector base 1, a wind tunnel body 2, a wind turbine 3, a wind inflow part 4 formed at the entire circumference of the wind collector base 1, a lower wind tunnel member 5 of the wind tunnel body 2, an upper wind tunnel member 6 of the wind tunnel body 2, a reduced part 7 of the wind tunnel body 2, a wind inlet 8 of the wind tunnel body 2, and a wind outlet 9 of the wind tunnel body 2. Furthermore, H represents a generator, and S represents gaps.

[0057] The wind collector base 1 is formed in a hollow disk shape, and has the entire circumference at which the wind inflow part 4 is formed. The wind tunnel body 2 includes the lower wind tunnel member 5 that is vertically installed on the wind collector base 1, that has a substantially rectangular cross-sectional shape, and whose cross-sectional area is formed as a cross-sectional area reduced linearly or curvilinearly from the wind inlet 8 formed on the collector base 1 side, and the upper wind tunnel member 6 that is formed so as to linearly or curvilinearly expand from a position of the reduced cross-sectional area to the wind outlet 9 at an upper end, and the lower wind tunnel member 5 and the upper wind tunnel member 6 each have long side parts 10 and short side parts 11.

[0058] The wind turbine 3 is installed at the reduced part 7 of the wind tunnel body 2 such that the interval between the long side parts 10 of the wind tunnel body 2 is minimum, and the ratio of the short side parts 11 and the long side parts 10 of the wind tunnel body 2 is 1 to 10 times. As a result, the gaps S are formed on both sides of the wind turbine 3.

[0059] Note that an arrow 12 indicates a flow of wind from the wind collector base 1 to the lower wind tunnel member 5, an arrow 13 indicates a flow of wind inside the wind tunnel body 2, and an arrow 14 indicates a flow of wind outside and above the wind tunnel body 2.

[0060] FIG. 4 is a side cross-sectional view different from FIG. 3, and illustrates an example where the wind tunnel body 2 is formed as a straight type. Note that, even in a case of this configuration, an unillustrated front cross-sectional view is drawn similarly to FIG. 1 and a reduced part is formed.

[0061] FIG. 5 is a plan view illustrating that vanes 15 that guide collected wind to the center part of the wind collector base 1 are provided at a periphery part of the upper surface of the wind collector base 1. The vanes 15 are curved toward the center part of the wind collector base 1 and consequently can collect wind from all directions at the center part of the wind collector base 1, and the collected wind is supplied to the wind inlet 8 of the lower wind tunnel member 5.

[0062] FIG. 6 is a plan view illustrating that a rotating body 16 that covers substantially half of the wind collector base 1 is provided at the outer circumference of the collector base 1, and a weathervane 17 is provided at the substantially center part of the rotating body 16, and FIG. 7 is a cross-sectional view taken along line A-A in FIG. 6. According to this configuration, the weathervane 17 having a yaw function is moved leeward according to a wind direction, and an opening portion of the rotating body 16 faces the wind direction, so that the opening part can effectively collect the wind.

[0063] Furthermore, it is preferable to form a wind dispersion part at the rim of the wind outlet 9 of the upper wind tunnel member 6. FIGS. 13A to 18 illustrate examples of the wind dispersion part.

[0064] The examples of the dispersion part include star-shaped dispersion parts illustrated in FIGS. 13A, 13B and 13C, a guard-shaped dispersion part illustrated in FIG. 14, a cutout-shaped dispersion part illustrated in FIG. 15, a gear-shaped dispersion part illustrated in FIG. 16, a rectangular dispersion part illustrated in FIG. 18, and the like, yet may be other shapes, and are not limited thereto.

[0065] Note that, as illustrated in FIG. 17, an area of a circle drawn by an outer circumferential circle D that connects the outermost parts of a star-shaped dispersion part is preferably twice or more an area of a circle drawn by an outer diameter d of a wind outlet 22b of a wind tunnel body 22.

[0066] In FIG. 17, a circle drawn by an outer dotted line is a virtual circle diameter that connects the vertexes of the star-shaped dispersion part, and a circle indicated by an inner solid line is the outer diameter of the wind outlet 9 of the wind tunnel body 2. The area of the star-shaped dispersion part in a circle diameter belt-shaped space sandwiched between the virtual circle diameter D and the outer diameter d of wind outlet is less than approximately half of the area of the other portion.

[0067] In the case of the guard-shaped dispersion part in FIG. 14, as illustrated in FIG. 14, the height of the guard is preferably set such that half of the difference between the outer diameter D of the guard and the inner diameter d of the wind outlet 22b is 1/10 to ? of the inner diameter d.

[0068] In the case of the cutout dispersion part in FIG. 15, cutouts are not limited to continuous cutouts, and may be provided at intervals, yet the total area of a cutout part is preferably more than half of an area of a surrounding part of the cutouts from a viewpoint of pressure loss in the cutout part.

[0069] According to the vertical wind speed acceleration type wind turbine employing the above configuration, the wind coming from all directions and collected by the wind collector base 1 reaches the wind inlet 8 of the lower wind tunnel member 5, further passes through the lower wind tunnel member 5, and rotates the wind turbine 3 installed at the reduced part 7 of the wind tunnel body 2 (arrow 12). At the same time, the high-speed air currents blow through the gaps S formed on the both sides of the wind turbine 3. Furthermore, the high-speed air currents blowing through the gaps S on the both sides of the wind turbine 3 push out the air current whose energy has been deprived by the wind turbine 3 and whose speed at the back of the wind turbine has been lowered, and recovers the speed energy of the air currents at the back of the wind turbine 3 (arrow 13).

[0070] At the same time, the lower wind tunnel member 5 formed such that the cross-sectional area is reduced linearly or curvilinearly from the wind inlet 8 to the position at which the wind turbine 3 is installed, guides the wind to the wind turbine 3, and supplies the wind passing through the wind turbine 3 to the upper wind tunnel member 6.

[0071] The upper wind tunnel member 6 is formed such that the reduced cross-sectional area expands linearly or curvilinearly from the position at which the wind turbine 3 is installed to the wind outlet 9. The wind of a lower speed and a higher pressure in the upper wind tunnel member 6 that has been supplied by bringing the wind having been supplied to the upper wind tunnel member 6 and having passed through the wind turbine 3 into contact with a faster air current of a lower pressure blowing through outside the upper wind tunnel member 6, and mixing, causing friction between, and absorbing the wind and the air current is pulled out from the wind outlet 9 to increase again the amount and the speed of the wind passing through the wind turbine 3 (arrow 14). This action is further promoted by forming the wind dispersion part at the rim of the wind outlet 9 at the upper end of the upper wind tunnel member 6. The present invention increases the wind speed at the back of the wind turbine 3 by the two-stage acceleration of the wind speed, and thereby improves the rotation efficiency of the wind turbine 3 and increases the power generation efficiency.

[0072] FIG. 8 illustrates another embodiment, and is a front cross-sectional view of the vertical wind speed acceleration type wind turbine formed such that the wind collector base 1 is provided at multiple stages (two stages) and the center parts thereof are raised. The same parts as those of the invention will be assigned the same reference numerals. According to this embodiment, it is possible to further improve a wind collecting function of the wind collector base 1.

[0073] FIGS. 9 and 10 further illustrate another embodiment, and illustrate examples where the wind tunnel body 2 is formed in a cylindrical shape. FIG. 9 is a schematic plan view of the vertical wind speed acceleration type wind turbine, and FIG. 10 is a front cross-sectional view thereof. Note that the side sectional view is the same as the front sectional view in this embodiment. The same parts as those of the invention will be assigned the same reference numerals. In this embodiment, the gaps S are not formed unlike the present invention.

[0074] FIGS. 11 and 12 further illustrate another embodiment, and illustrate a structure that the above wind tunnel body structures are disposed at two stages. FIG. 11 is a front cross-sectional view of the vertical wind speed acceleration type wind turbine, and FIG. 12 is a plan view of a guide.

[0075] FIGS. 11 and 12 illustrate a guide 20, FIG. 12 is a plan view thereof, and vanes 21 are formed on the upper surface. Furthermore, wind inlets are provided at two stages, lower wind inlets 22 serve as intake ports for wind turbine rotation wind, and upper wind inlets 23 are guided toward an upper side of the wind turbine 3 and serve as intake ports for stagnation sweep wind. FIG. 11 illustrates support bars 24 of the wind turbine 3 and the generator H, and a bearing 25.

[0076] In this embodiment, too, the wind turbine 3 is installed at the reduced part 7 of the wind tunnel body 2. Furthermore, in addition to the wind from the intake ports 22 for wind turbine rotation wind, wind of a lower speed and a higher pressure having passed through the wind turbine 3 is brought into contact with faster air currents of lower pressures supplied from the wind intake ports 23 for stagnation sweep wind, and pulled out, so that it is possible to increase the amount and the speed of the wind passing through the wind turbine 3.

INDUSTRIAL APPLICABILITY

[0077] The present invention provides the vertical wind speed acceleration type wind turbine that includes a wind collector base, a wind tunnel body, and a wind turbine, collects wind from all directions and increases a wind speed at the back of the wind turbine, increases the wind speed at the outlet portion of the wind tunnel body, and, as a result, improves the rotation efficiency of blades of the wind turbine and increases the generated power, and is highly advantageous in the field of wind power generation.