JP2006329106A - Wind power generation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wind power generation system having an improved appearance in which a plurality of windmill units can be coaxially connected to one another and generators are also arranged coaxially. <P>SOLUTION: The wind power generation system includes: a fixed shaft 10; the windmill units 2 each having blade members 4, 5 rotatable around the fixed shaft 10; first and second radial bearings 11, 14 for supporting both the axial ends of the blade members 4, 5; and the generators 8 which generate power in cooperation with rotation of the windmill units 2, the generators 8 being arranged coaxially with the fixed shaft 10. The first radial bearings 11 is each arranged on a rotatable part of the generator 8, the rotatable part being integrally connected to the windmill unit 2. First and second supporting plates 6, 7 are provided on both the axial ends of the blade members 4, 5. The generator 8 is secured to the first supporting plate 6. The first radial bearing 11 includes an outer ring attached to the rotatable part of the generator 8 and an inner ring fitted on the fixed shaft. A bearing housing 13 is provided on the second supporting plate 7. The second radial bearing 14 includes an outer ring attached to the bearing housing 13 and an inner ring fitted on the fixed shaft. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wind turbine generator having a windmill unit and a generator that generates electric power by the rotation of the windmill unit.

  As such a wind power generator, there is an illuminating lamp that is disclosed on the following non-patent literature website. This wind power generator includes a Savonius-type windmill and a generator that is generated by the windmill, and lights a lamp using energy stored by the generator. One windmill unit (Savonius type windmill) is attached to the side surface of the main body of the illuminating lamp.

On the other hand, there is currently no known wind turbine generator in which a plurality of wind turbine units are arranged so that their rotational axes are coaxial and each generator unit has a generator individually. For example, when the power generation units are connected coaxially and installed on the wall surface of a building, it is necessary to install the wind power generator so that it does not protrude so much from the wall surface. When installing a plurality of wind turbine units, it is necessary to arrange them coaxially so that they have a good appearance. Furthermore, for the same reason, even when a generator is provided, it is necessary that the rotating shaft of the generator and the rotating shaft of the wind turbine unit be coaxial.
INABA, “Wind Light Product List”, [Search May 20, 2005], Internet <URL: http://www2.ocn.ne.jp/~inabalit/kazeakari_top.htm>

  Here, if an inner rotor type generator is used as the generator, the rotation center of the generator is arranged at a position shifted from the rotation axis of the wind turbine unit in order to avoid complication of the shaft support structure, a pulley, etc. Therefore, it was necessary to connect the generator and the wind turbine unit. Therefore, the generator is disposed at a position where it protrudes to the extent that it cannot be coaxial with the wind turbine unit, and the use of pulleys also causes a decrease in power generation efficiency.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a good-looking wind power generation apparatus in which a plurality of wind turbine units can be coaxially connected and a generator is also coaxially arranged. .

In order to solve the above problems, a wind turbine generator according to the present invention is
A fixed shaft;
A wind turbine unit having a blade member rotatable around the axis of the fixed shaft;
A first bearing and a second bearing for rotatably supporting both axial ends of the wing member with respect to a fixed shaft;
A power generator that is linked to the rotation of the windmill unit, and a generator that is arranged coaxially with the fixed shaft;
The first bearing is provided in a rotating portion of the generator, and the rotating portion is integrally coupled with the wind turbine unit.

  The operation and effect of the wind turbine generator with this configuration will be described. This wind power generator includes a windmill unit having a fixed shaft and a blade member rotatable around the fixed shaft. Support for the fixed shaft of the wind turbine unit is performed by the first bearing and the second bearing disposed on both axial ends of the blade member. As a result, the wind turbine unit can rotate with respect to the fixed shaft. The first bearing is provided in a rotating portion of the generator, and this rotating portion is coupled integrally with the wind turbine unit. Therefore, the windmill unit is rotatably supported on the fixed shaft via the generator, and the windmill unit and the generator can be supported coaxially. According to this configuration, a plurality of wind turbine units can be installed side by side along the fixed axis. Moreover, since the generator can also be arranged coaxially, the amount of protrusion from the fixed shaft can also be suppressed. As a result, it is possible to connect a plurality of wind turbine units coaxially, and also to arrange a generator coaxially, thereby providing a good-looking wind power generator.

In the present invention, the wing member comprises a first wing support and a second wing support disposed on both axial ends of the wing member,
The generator whose rotating part is fixed to the first wing support;
An outer ring is attached to the rotating portion, and the first bearing has an inner ring fitted to a fixed shaft;
A bearing housing provided on the second blade support;
Preferably, an outer ring is attached to the bearing housing, and the inner ring includes the second bearing that fits on the fixed shaft.

  According to this configuration, the first blade support and the second blade support are provided on both axial ends of the blade member. A generator is fixed to the first blade support, and an outer ring of the first bearing is attached to a rotating portion of the generator. Therefore, when the wing member is rotated by wind power, the first wing support is rotated and the rotating portion of the generator is rotated. The inner ring of the first bearing is fitted and attached to the fixed shaft. In addition, an outer ring of the second bearing is attached to the other second blade support, and the inner ring of the second bearing is fitted to the fixed shaft. Thereby, the both ends of a windmill unit can be reliably supported by a bearing, and a generator can also be supported coaxially with a fixed shaft.

  In this invention, it is preferable that the said fixed shaft is a hollow cylindrical shaft, and the wiring of a generator is accommodated in the inside.

  The fixed shaft is formed hollow, and the wiring of the generator is passed through this, so that the wiring can be accommodated without appearing the appearance, and the twist of the wiring is not caused by the rotation of the windmill unit.

  In the present invention, it is preferable that a magnet is mounted on the rotating portion of the generator, and a power generation coil and a circuit board are mounted on the fixed portion.

  Thereby, when a windmill unit rotates with wind power, the magnet of a rotation part rotates. In addition, a power generation coil is mounted on the fixed portion facing the rotating portion, and power can be generated by rotating the magnet. Further, since the power generating coil and the circuit board are mounted on the fixed portion, the wiring is not twisted by the rotation of the wind turbine unit.

  It is preferable that a plurality of wind turbine units according to the present invention are attached along the fixed shaft.

  Necessary electric power can be obtained by providing a plurality of wind turbine units coaxially. Moreover, a generator can be provided for each wind turbine unit. Therefore, generators having various purposes can be arranged coaxially.

  In the present invention, it is preferable that character information is formed on the surface of the wing member. For example, it can also be used as an advertising character, a signboard, etc., and can be installed in a natural form on the wall surface of a building, for example.

  A preferred embodiment of a wind turbine generator according to the present invention will be described with reference to the drawings. FIG. 1 is an external perspective view showing a configuration of a multiple small wind power generator 1 (hereinafter simply referred to as a wind power generator).

<Configuration of wind power generator>
This wind turbine generator 1 has three wind turbine units 2A, 2B, 2C in the vertical (vertical) direction, and the top wind turbine unit 2A and the bottom wind turbine unit 2C are supported by the support frame 3. ing. The support frame 3 has a vertical portion 3a extending vertically and horizontal portions 3b formed at both ends of the vertical portion 3a. As shown in FIG. 2, the wind power generator 1 is preferably installed on a wall surface of a building (building, condominium, etc.). When installing on the wall surface, it is constructed so that the vertical portion 3a is fixed to the wall surface. In the example of FIG. 2, the wind power generator 1 shown in FIG.

  Returning to FIG. 1, each wind turbine unit 2 includes a first blade member 4 and a second blade member 5. A first support plate 6 (corresponding to the first wing support) and a second support plate 7 (corresponding to the second wing support) are provided on both axial ends of the first and second wing members 4 and 5. It is a disk-shaped plate. A generator 8 is attached below the first support plate 6 on the lower side.

<Shape of windmill>
Next, the shapes of the first blade member 4 and the second blade member 5 constituting the wind turbine unit 2 will be described with reference to FIG. FIG. 3 shows a cross-sectional view of the first and second wing members 4 and 5 cut in the horizontal direction. This windmill is called a Savonius type. Compared to a propeller-type windmill, the windmill has low energy conversion efficiency at high speed rotation, but has a characteristic that a large torque is generated in a low speed rotation range. It is a suitable type of windmill in areas where strong winds do not blow, such as in urban areas, and has the advantages of low noise and vibration and easy installation.

  As shown in FIG. 3, the first wing member 4 has a wind receiving surface 4 a formed as a concave surface, and the concave surface is formed by a cycloid curve (excluding the central portion in the width direction and part of both end portions). . Furthermore, it has the wind escape surface 4b formed in the convex surface, and this convex surface is also formed by the cycloid curve (except for the center part of width direction and a part of both ends). Due to these two cycloid curves, the first wing member 4 is formed with an equal thickness portion (or a substantially equal portion).

  On the wind escape surface 4b, small concave portions 4c are formed at both ends in the width direction. Although the wind hitting the wind escape surface 4b becomes resistance to rotation, the resistance can be reduced by forming the small recess 4c. Thereby, the rotational performance of a windmill can be improved. The small recess 4c is formed along a direction perpendicular to the paper surface of FIG. 3 and has a groove shape. Moreover, the convex part 4d is formed so that the part of the further outer side of the small recessed part 4c may become thick. Thereby, the intensity | strength of the 1st blade member 4 whole can be hold | maintained. Further, on the side of the wind receiving surface 4a, mounting holes 4e formed in a cutout shape are formed in three places (both ends and a central portion). The first wing member 4 is preferably manufactured by extrusion molding and has the same cross-sectional shape in the longitudinal direction (rotational axis direction).

  The second wing member 5 has almost the same shape as the first wing member 4. Similarly, the wind receiving surface 5a, the wind escape surface 5b, the small recessed part 5c, the convex part 5d, and the attachment hole 5e are provided. The function is the same as that of the first wing member 4. Support plates 6 and 7 are provided on both sides of the first and second blade members 4 and 5 in the longitudinal direction (rotational axis direction), respectively, and the support plates 6 and 7 are attached by screws or the like using the mounting holes 4e and 5e. Attached to. In addition, a rotation center R (which coincides with the axis of the fixed shaft 10) is set at the center of the support plates 6 and 7, and the first wing member 4 and the second wing member 5 are in relation to the rotation center R. Are arranged point-symmetrically or substantially point-symmetrically. Thereby, the 1st and 2nd wing members 4 and 5 can rotate centering on rotation center R because wind receiving surfaces 4a and 5a receive wind.

  According to the Savonius type windmill as described above, since the wind receiving surface and the wind escape surface are formed by the cycloid curve, the speed and amount of wind flow can be increased, and the rotational performance is improved. Further, the thickness of the windmill can be reduced and the size can be reduced, thereby improving the rotation performance.

<Internal configuration of wind turbine generator>
Next, the internal configuration of the wind turbine generator will be described with reference to a cross-sectional view of FIG. 4 and enlarged views of main parts of FIGS. FIG. 4 shows only the lower two wind turbine units 2B and 2C among the three wind turbine units 2 shown in FIG. Incidentally, in this embodiment, although all the three windmill units 2 have the same configuration, the windmill units 2 having different structures may be arranged coaxially.

  A fixed shaft 10 is installed at the rotation center R of the windmill unit 2. The fixed shaft 10 is formed by a plurality of shaft members. In a region where the wing members 4 and 5 are disposed, a main fixed shaft 10a is disposed, and an auxiliary fixed shaft 10b is connected to a lower end of the main fixed shaft 10a by a screw. The lower end of the auxiliary fixed shaft 10b is further coupled by a connection fixed shaft 10c, and the connection fixed shaft is coupled to the horizontal portion 3b of the support frame 3. The fixed shaft 10 is constituted by a plurality of shaft members as described above, but functions as a single fixed shaft 10 as a whole. The outer diameter of the main fixed shaft 10a and the shape of the wing members 4 and 5 are set so that the main fixed shaft 10a does not interfere when the wing members 4 and 5 rotate.

  Lower ends in the axial direction of the first wing member 4 and the second wing member 5 are coupled to the first support plate 6 with screws. A generator 8 is disposed on the lower surface side of the first support plate 6. The generator 8 includes a first case 8a and a second case 8b as members constituting the appearance, and the cases 8a and 8b correspond to rotating portions and are connected by screws. The first case 8a on the upper side is connected to the first support plate 6 by screws. Further, a magnet for power generation is placed on the first case 8a and / or the second case 8b. Therefore, when the windmill unit 2C is rotated by the wind force, the first and second cases 8a and 8b and the magnet are rotated together.

  A first radial bearing 11 (corresponding to the first bearing) is disposed around the auxiliary fixed shaft 10b. The inner ring of the first radial bearing 11 is fixed in a form fitted to the outer periphery of the auxiliary fixed shaft 10b. Three first radial bearings 11 are arranged in total, and two of them are connected to the first case 8a and the other one is connected to the second case 8b. Accordingly, the first and second cases 8a and 8b function as bearing housings.

  In an internal space formed by the first case 8a and the second case 8b, a substrate support 8c (corresponding to a fixed portion) on which a power generating coil and a circuit substrate are mounted is provided. The substrate support 8c is coupled to the auxiliary fixed shaft 10b. Therefore, when the first and second wing members 4 and 5 are rotated by the wind force, the magnet is rotated, so that power is generated by the power generation coil. The wiring 12 is accommodated in the fixed shaft 10 formed in a hollow shape. The wiring 12 is connected to a power storage unit (not shown).

  As described above, the generator 8 is an outer rotor type generator, and the wiring 12 can be smoothly passed by forming the fixed shaft 10 as a hollow shaft, and the wiring 12 is twisted by the rotation of the wind turbine unit 2. Inconvenience does not occur. Moreover, since the wiring 12 passes through the inside of the fixed shaft 10, it does not appear in the appearance and the appearance is good.

  Next, the configuration of the upper end side of the main fixed shaft 10b will be described. The axial upper ends of the first wing member 4 and the second wing member 5 are coupled to the second support plate 7 with screws. A bearing housing 13 is coupled to the upper surface side of the second support plate 7 by screws. The upper end portion of the main fixed shaft 10a is integrally formed as a small diameter portion 10d, and a second radial bearing 14 (corresponding to a second bearing) is attached thereto. That is, the inner ring of the second radial bearing 14 is fitted into the small diameter portion 10 d and the outer ring is coupled to the bearing housing 13. As described above, the vertical direction of the wind turbine unit 2 is supported with respect to the fixed shaft 10 by the first and second radial bearings 11 and 14.

  Another auxiliary fixed shaft 16 is connected to the upper end of the small-diameter portion 10d with a screw, and the windmill unit 2B is disposed on the upper portion thereof. In addition, about the support structure of the windmill unit 2B, since it is the same as the windmill unit 2C already demonstrated, description is abbreviate | omitted. In addition, the wiring 16 from the generator 8 of the windmill unit 2B passes through the fixed shaft 10 in the same manner, and is drawn out to the same place as the wiring 12 from the generator 8 of the windmill unit 2C. The same applies to the windmill unit 2A.

  According to the above structure, the several windmill unit 2 and the generator 8 can be arrange | positioned coaxially with a fixed shaft. The number of installed wind turbine units 2 is three in the present embodiment, but how many are set can be arbitrarily determined. Moreover, each windmill unit 2 and the generator 8 can be operated independently, and you may arrange | position the windmill unit 2 of a different kind and performance coaxially. In this case, the rotational torque caused by the wind power of the windmill and the rotational torque of the generator 8 can be the most balanced combination, and the appropriate generator 8 can be installed in the installed windmill unit 2. For example, when the high-output generator 8 is used, a large rotational torque is required, and startability (startability) is deteriorated. Conversely, if the generator 8 having a rotational torque smaller than the rotational torque of the windmill is used, energy from the windmill is wasted. According to the present invention, a wind turbine generator can be configured by the wind turbine unit 2 and the generator 8 in an appropriate combination.

  Moreover, it is the structure which couple | bonds several windmill units 2 with respect to one fixed axis | shaft 10 sequentially, it becomes unnecessary to perform the centering operation | work of the rotation center of several windmill units 2, and can improve productivity. . The electric power generated by the windmill unit 2 can be stored, and for example, can be used as a power source for billboard illumination at night.

<Another embodiment of usage example>
Next, another embodiment of a usage example of the wind turbine generator 1 according to the present invention is shown in FIG. In FIG. 7, a wind turbine generator 1 in which wind turbine units 2 are connected in triplicate is installed on a wall surface of a building. Character information is formed on the surface of the wing members 4 and 5 of the windmill unit 2 and can function as an advertisement display or a signboard. In the case of a moving signboard, a catch eye effect can be obtained. In addition, various wind turbines can be installed on the same axis, which is excellent in design and can be used as a monument.

<Another embodiment>
In the present embodiment, the Savonius type windmill has been described as the blade members 4 and 5, but various modifications can be made to the specific shape of the blades of the blade members 4 and 5.

  In the present embodiment, the generator 8 is disposed on the lower side of the wind turbine unit 2, but may be disposed on the upper side.

External perspective view showing the configuration of the wind turbine generator Figure showing an installation example of a wind turbine generator Sectional view showing the shape of the wing member Sectional drawing which shows the internal structure of a wind power generator Partial enlarged view showing the main part of FIG. Partial enlarged view showing the main part of FIG. The figure which shows another embodiment of the usage example of a wind power generator

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wind power generator 2, 2A, 2B, 2C Windmill unit 3 Support frame 4 1st wing member 5 2nd wing member 6 2nd support plate 7 2nd support plate 8 Generator 8a 1st case 8b 2nd case 8c Board support Body 10 Fixed shaft 10a Main fixed shaft 10b Auxiliary fixed shaft 11 First radial bearings 12, 15 Wiring 13 Bearing housing 14 Second radial bearing

Claims (6)

A fixed shaft;
A wind turbine unit having a blade member rotatable around the axis of the fixed shaft;
A first bearing and a second bearing for rotatably supporting both axial ends of the wing member with respect to a fixed shaft;
A power generator that is linked to the rotation of the windmill unit, and a generator that is arranged coaxially with the fixed shaft;
The said 1st bearing is provided in the rotation part of a generator, and this rotation part is integrally couple | bonded with the windmill unit, The wind power generator characterized by the above-mentioned. A first wing support body and a second wing support body disposed on both axial ends of the wing member,
The generator whose rotating part is fixed to the first wing support;
An outer ring is attached to the rotating portion, and the first bearing has an inner ring fitted to a fixed shaft;
A bearing housing provided on the second blade support;
The wind turbine generator according to claim 1, wherein an outer ring is attached to the bearing housing, and the inner ring is provided with the second bearing fitted into a fixed shaft.   The wind turbine generator according to claim 1 or 2, wherein the fixed shaft is a hollow cylindrical shaft, and a wiring of a generator is accommodated therein.   The wind power generator according to any one of claims 1 to 3, wherein a magnet is mounted on the rotating portion of the generator, and a power generation coil and a circuit board are mounted on the fixed portion.   The wind turbine generator according to any one of claims 1 to 4, wherein a plurality of the wind turbine units are attached along a fixed shaft.   The wind power generator according to any one of claims 1 to 5, wherein character information is formed on a surface of the wing member.

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