JPWO2006046337A1 - Windmill - Google Patents
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- JPWO2006046337A1 JPWO2006046337A1 JP2006542250A JP2006542250A JPWO2006046337A1 JP WO2006046337 A1 JPWO2006046337 A1 JP WO2006046337A1 JP 2006542250 A JP2006542250 A JP 2006542250A JP 2006542250 A JP2006542250 A JP 2006542250A JP WO2006046337 A1 JPWO2006046337 A1 JP WO2006046337A1
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- blades
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- 238000004049 embossing Methods 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 5
- 238000009434 installation Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor
- F03D3/06—Rotors
- F03D3/061—Rotors characterised by their aerodynamic shape, e.g. aerofoil profiles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/20—Rotors
- F05B2240/21—Rotors for wind turbines
- F05B2240/211—Rotors for wind turbines with vertical axis
- F05B2240/213—Rotors for wind turbines with vertical axis of the Savonius type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/20—Rotors
- F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05B2240/32—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor with roughened surface
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/96—Preventing, counteracting or reducing vibration or noise
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
[課題]弱い風でも効率よく回転し、かつ、羽根の後面側での風切り音が小さい抗力利用型の風車を提供することである。[解決手段]抗力利用型のサポニウス型風車の羽根3をアルミニウム合金製の薄板で形成し、各羽根3に、風を受ける前面側に凹で、後面側に凸の多数の球面エンボス6プレスによるエンボス加工で成形することにより、前面側のエンボス6の凹形状で風を受ける羽根3の抗力を増大させて、弱い風でも効率よく回転可能とするとともに、後面側のエンボス6の凸形状とその他の部分との間で形成される凹凸によって、羽根3の後面側での風切り音を小さくできるようにした。[Problem] To provide a drag-use type windmill that rotates efficiently even in a weak wind and has a small wind noise on the rear side of the blade. [Means for Solving] Blades 3 of a drag-powered Saponius type windmill are formed of a thin plate made of an aluminum alloy, and each blade 3 is formed by a large number of spherical embossed 6 presses that are concave on the front side for receiving wind and convex on the rear side. By forming by embossing, the drag of the blade 3 receiving the wind is increased by the concave shape of the emboss 6 on the front side, enabling efficient rotation even in weak wind, and the convex shape of the emboss 6 on the rear side and others The wind noise on the rear surface side of the blade 3 can be reduced by the unevenness formed between the first and second portions.
Description
本発明は、風力発電等の動力源として用いられる風車に関する。The present invention relates to a windmill used as a power source for wind power generation or the like.
風力発電等の動源力として用いられる風車には、羽根を一定厚みの板材で形成し、風を受ける羽根の抗力をそのまま利用して回転軸を回転させる抗力利用型のものと、羽根の断面に翼状の膨らみを持たせ、風を受ける羽根の抗力を揚力に変換して利用する揚力利用型のものとがある。なお、回転軸の向きによって分類すると、回転軸を風の向きと略直角方向に向けるサポニウス型風車、パドル型風車、S形ロータ等の垂直軸型のものと、回転軸を風の向きの方向に向けるプロペラ型風車等の水平軸型のものとがある。For wind turbines used as a driving force for wind power generation, etc., blades are made of plate material of a certain thickness, and a drag-use type that rotates the rotating shaft using the drag of the blades that receive the wind as it is, and a cross section of the blades There is a type using lift that uses a wing-like bulge and converts the drag of the blades that receive wind into lift. When classified according to the direction of the rotation axis, vertical axis types such as Saponius type windmills, paddle type windmills, S-shaped rotors, etc., which turn the rotation axis in a direction substantially perpendicular to the direction of the wind, and the rotation axis as the direction of the wind direction Some of them are of the horizontal axis type such as propeller type windmills.
前記抗力利用型の風車は、揚力利用型のものと較べると出力は比較的小さいが、羽根を一定厚みの板材から簡単に製造できる利点があるので、小規模の風力発電用として、街中でビルの屋上等に設置するのに適している。The drag-type windmill has a relatively small output compared to a lift-type windmill, but has the advantage that the blades can be easily manufactured from a plate having a certain thickness. It is suitable for installation on the rooftop.
一方、上述した風車の型式に関わらず、羽根の前面側に凹部を設けると、風を受ける羽根の抗力を増大させ、風車の回転効率を向上できることが知られている(例えば、特許文献1、2参照)。また、揚力利用型のプロペラ型風車では、風を切って回転する羽根の前後面に凹凸を設けると風切り音が小さくなり、風車の回転に伴う騒音を低減できることが知られている(例えば、特許文献3、4参照)。On the other hand, regardless of the type of windmill described above, it is known that providing a recess on the front side of the blade can increase the drag of the blade that receives the wind and improve the rotational efficiency of the windmill (for example, Patent Document 1, 2). In addition, in a propeller type windmill using lift, it is known that when the front and rear surfaces of the blades rotating by turning the wind are provided with unevenness, the wind noise is reduced and noise accompanying rotation of the windmill can be reduced (for example, patents).
上述した抗力利用型の風車は、街中でビルの屋上等に設置するのに適しているが、羽根の後面側での風切り音が大きく、騒音の原因となる問題がある。また、街中ではあまり強い風を期待できないので、弱い風でも効率よく回転することが望まれる。The above-described drag-utilizing type windmill is suitable for installation on the rooftop of a building in the city, but there is a problem that the wind noise on the rear side of the blades is large and causes noise. In addition, since a strong wind cannot be expected in the city, it is desirable to rotate efficiently even in a weak wind.
そこで、本発明の課題は、弱い風でも効率よく回転し、かつ、羽根の後面側での風切り音が小さい抗力利用型の風車を提供することである。Accordingly, an object of the present invention is to provide a drag-utilizing type windmill that rotates efficiently even in a weak wind and has a small wind noise on the rear side of the blade.
上記の課題を解決するために、本発明は、羽根が一定厚みの板材で形成され、風を受けるこれらの羽根の抗力をそのまま利用して回転軸を回転させる抗力利用型の風車において、前記羽根を形成する板材を薄肉のものとし、この薄肉の板材で形成した羽根に、風を受ける前面側に凹で、後面側に凸の多数のエンボスを設けた構成を採用した。In order to solve the above-described problems, the present invention provides a drag-use wind turbine in which the blades are formed of a plate material having a constant thickness and rotate the rotation shaft by directly using the drag force of the blades receiving wind. A thin plate material is used, and the blades made of this thin plate material are provided with a number of embossments that are concave on the front side receiving wind and convex on the rear side.
すなわち、羽根を形成する板材を薄肉のものとし、この薄肉の板材で形成した羽根に、風を受ける前面側に凹で、後面側に凸の多数のエンボスを設けることにより、前面側のエンボスの凹形状で風を受ける羽根の抗力を増大させて、弱い風でも効率よく回転可能とするとともに、後面側のエンボスの凸形状とその他の部分との間で形成される凹凸によって、羽根の後面側での風切り音を小さくできるようにした。In other words, the blade material forming the blades is thin, and the blades formed of this thin plate material are provided with a number of embossments that are concave on the front side that receives the wind and convex on the rear side, so that By increasing the drag of the blade that receives the wind with a concave shape, it can rotate efficiently even with a weak wind, and the rear surface side of the blade by the unevenness formed between the convex shape of the embossment on the rear surface side and other parts The wind noise at can be reduced.
前記羽根を形成する板材を金属板とし、前記エンボスをエンボス加工で形成することにより、プレス等を用いて、羽根を安価で簡単に製造することができる。By using a metal plate as the plate material forming the blades and forming the embossing by embossing, the blades can be easily manufactured at low cost using a press or the like.
前記エンボスを球面エンボスとすることにより、羽根の後面側での風切り抵抗を少なくし、風切り音をより小さくすることができる。By making the embossing into a spherical embossing, the wind cutting resistance on the rear surface side of the blade can be reduced, and the wind noise can be further reduced.
前記エンボスを千鳥状の配列で設けることにより、羽根の剛性を高めることができる。By providing the embosses in a staggered arrangement, the rigidity of the blades can be increased.
前記エンボスの高さは3〜8mmとするのが好ましい。エンボスの高さが3mm未満では、羽根の前面側の凹形状による抗力の増大効果が少なく、8mmを超えると、羽根の後面側での凹凸が大きくなり過ぎて、風切り音が増大傾向となるからである。The height of the emboss is preferably 3 to 8 mm. When the height of the emboss is less than 3 mm, there is little effect of increasing the drag due to the concave shape on the front side of the blade, and when it exceeds 8 mm, the unevenness on the rear side of the blade becomes too large and the wind noise tends to increase. It is.
本発明の風車は、抗力利用型のものを対象として、羽根を形成する板材を薄肉のものとし、この薄肉の板材で形成した羽根に、風を受ける前面側に凹で、後面側に凸の多数のエンボスを設けたので、前面側のエンボスの凹形状で風を受ける羽根の抗力を増大させて、弱い風でも効率よく回転させることができるとともに、後面側のエンボスの凸形状とその他の部分との間で形成される凹凸によって、羽根の後面側での風切り音を小さくすることができる。The windmill of the present invention is intended for a drag-utilizing type, and the plate material forming the blades is thin, and the blades formed of this thin plate material are concave on the front side receiving the wind and convex on the rear side. Since a large number of embossings are provided, it is possible to increase the drag of the blades that receive wind with the concave shape of the embossment on the front side, and to rotate efficiently even with weak wind, and the convex shape of the rear side embossment and other parts The wind noise on the rear side of the blade can be reduced by the unevenness formed between the blade and the blade.
前記羽根を形成する板材を金属板とし、前記エンボスをエンボス加工で形成することにより、プレス等を用いて、羽根を安価で簡単に製造することができる。By using a metal plate as the plate material forming the blades and forming the embossing by embossing, the blades can be easily manufactured at low cost using a press or the like.
前記エンボスを球面エンボスとすることにより、羽根の後面側での風切り抵抗を少なくし、風切り音をより小さくすることができる。By making the embossing into a spherical embossing, the wind cutting resistance on the rear surface side of the blade can be reduced, and the wind noise can be further reduced.
前記エンボスを千鳥状の配列で設けることにより、羽根の剛性を高めることができる。
[発明を実現するための最良の形態]By providing the embosses in a staggered arrangement, the rigidity of the blades can be increased.
[Best Mode for Carrying Out the Invention]
以下、図面に基づき、この発明の実施形態を説明する。図1乃至図3は、第1の実施形態を示す。この風車は抗力利用型のサポニウス型風車であり、図1および図2に示すように、風の向きと略直角方向に向けられる垂直軸1に取り付けた上下の端板2a、2bの間に、風を受ける前面側へ凹状に湾曲する半円筒状の2枚の羽根3を、中心をずらして互いに向かい合わせるように取り付けたものである。なお、上下の端板2a、2bは、各羽根3の両端部に取り付けられた垂直枠4と、補強用の2本の垂直棒5で連結されている。Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 3 show a first embodiment. This windmill is a drag-powered Saponius-type windmill, as shown in FIGS. 1 and 2, between upper and
前記各羽根3はアルミニウム合金製の薄板で形成され、図2中に矢印Aで示す風を受ける前面側に凹で、後面側に凸の多数の球面エンボス6が設けられており、後面側はこれらのエンボス6部分とその他の部分とによって凹凸が形成されている。この風車は垂直軸1の回りに矢印Bの方向へ回転するが、羽根3の前面側で風を受けるときに、エンボス6の凹形状で羽根3の抗力が増大して弱い風でも回転するとともに、羽根3の後面側で風を切るときに、その凹凸によって風切り音を小さくすることができる。Each
前記エンボス6はプレスを用いたエンボス加工で形成したものであり、その高さは約5mmとされている。また、図3に示すように、エンボス6は千鳥状に配列されており、薄肉で表面積の大きい羽根3の剛性が確保されるようになっている。The
図4および図5は、第2の実施形態を示す。この風車は抗力利用型のパドル型風車であり、垂直軸7の周りに90°の位相で、風を受ける前面側へ凹状に湾曲する半円筒状の4枚の羽根8を支持棒9で取り付けたものである。各羽根8の上下端には、上下への風の逃げを防止する端板10が取り付けられている。4 and 5 show a second embodiment. This windmill is a drag-type paddle type windmill, and is attached with four
前記各羽根8は、第1の実施形態のものと同様に、アルミニウム合金製の薄板で形成され、図5中に矢印Aで示す風を受ける前面側に凹で、後面側に凸の多数の球面エンボス11が設けられており、後面側はこれらのエンボス11部分とその他の部分とによって凹凸が形成されている。また、このエンボス11も、エンボス加工で形成されており、その高さは約5mmとされ、千鳥状に配列されている。Each of the
この風車は垂直軸7の回りに図5中の矢印Bの方向へ回転するが、羽根8の前面側で風を受けるときに、エンボス11の凹形状で羽根8の抗力が増大して弱い風でも回転するとともに、羽根8の後面側で風を切るときに、その凹凸によって風切り音を小さくすることができる。This windmill rotates around the vertical axis 7 in the direction of arrow B in FIG. 5, but when receiving wind on the front side of the
図6および図7は、第3の実施形態を示す。この風車は抗力利用型のプロペラ型風車であり、水平軸12の周りに120°の位相で、風を傾斜面で受ける3枚の羽根13を支持棒14で取り付けたものである。この羽根13も、第1の実施形態のものと同様に、アルミニウム合金製の薄板で形成され、図6および図7中に矢印Aで示す風を受ける前面側に凹で、後面側に凸の多数の球面エンボス15が設けられており、後面側はこれらのエンボス15部分とその他の部分とによって凹凸が形成されている。また、このエンボス15もエンボス加工で成形され、千鳥状に配列されている。6 and 7 show a third embodiment. This windmill is a propeller type windmill using a drag force, and has three
上述した実施形態では、各風車の羽根をアルミニウム合金製の薄板で形成し、球面エンボスをエンボス加工で成形したが、羽根は他の金属板やプラスチック板で形成してもよく、プラスチック板で形成する場合は、エンボスを射出成形で成形することもできる。なお、エンボスは球面エンボスに限定されることはなく、任意の形状のものとすることができる。In the above-described embodiment, the blades of each windmill are formed of a thin plate made of aluminum alloy and the spherical emboss is formed by embossing. However, the blades may be formed of other metal plates or plastic plates, or formed of plastic plates. If so, the emboss can be formed by injection molding. Note that the embossing is not limited to the spherical embossing and can be of any shape.
1 垂直軸
2a、2b 端板
3 羽根
4 垂直枠
5 垂直棒
6 エンボス
7 垂直軸
8 羽根
9 支持棒
10 端板
11 エンボス
12 水平軸
13 羽根
14 支持棒
15 エンボスDESCRIPTION OF SYMBOLS 1
Claims (5)
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JP2004316568 | 2004-10-29 | ||
JP2004316568 | 2004-10-29 | ||
PCT/JP2005/013515 WO2006046337A1 (en) | 2004-10-29 | 2005-07-08 | Windmill |
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JPWO2006046337A1 true JPWO2006046337A1 (en) | 2008-05-22 |
JP4352344B2 JP4352344B2 (en) | 2009-10-28 |
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JP2002307117A (en) * | 2001-04-09 | 2002-10-22 | Nippon Steel Corp | Metallic lightweight panel and method of manufacturing the same |
JP2002310057A (en) * | 2000-09-22 | 2002-10-23 | Omoto Masako | Blade of wind mill for wind power generation and unit and apparatus using it |
JP2003003945A (en) * | 2001-06-19 | 2003-01-08 | Dmw Japan:Kk | Invention for increasing resistance of wind by forming dimples on windmill blade |
JP2003033825A (en) * | 2001-07-18 | 2003-02-04 | Komatsu Ltd | Forming method for sheet material |
JP2004025273A (en) * | 2002-06-27 | 2004-01-29 | Sumitomo Metal Ind Ltd | Apparatus and method for manufacturing press-formed article |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS5848998U (en) * | 1981-09-30 | 1983-04-02 | カルソニックカンセイ株式会社 | Juan |
JPH0777211A (en) * | 1993-06-28 | 1995-03-20 | Mitsubishi Heavy Ind Ltd | Plate-like body slip stream control device |
JP2003293933A (en) * | 2002-04-01 | 2003-10-15 | Tomoji Oikawa | Simple wind power generating device |
-
2005
- 2005-07-08 JP JP2006542250A patent/JP4352344B2/en not_active Expired - Fee Related
- 2005-07-08 WO PCT/JP2005/013515 patent/WO2006046337A1/en active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06323237A (en) * | 1993-05-12 | 1994-11-22 | Oval Corp | Savonius windmill |
JPH11192804A (en) * | 1997-10-27 | 1999-07-21 | Washi Kosan Kk | Wheel having rim to which rib structure is given |
JP2002310057A (en) * | 2000-09-22 | 2002-10-23 | Omoto Masako | Blade of wind mill for wind power generation and unit and apparatus using it |
JP2002307117A (en) * | 2001-04-09 | 2002-10-22 | Nippon Steel Corp | Metallic lightweight panel and method of manufacturing the same |
JP2003003945A (en) * | 2001-06-19 | 2003-01-08 | Dmw Japan:Kk | Invention for increasing resistance of wind by forming dimples on windmill blade |
JP2003033825A (en) * | 2001-07-18 | 2003-02-04 | Komatsu Ltd | Forming method for sheet material |
JP2004025273A (en) * | 2002-06-27 | 2004-01-29 | Sumitomo Metal Ind Ltd | Apparatus and method for manufacturing press-formed article |
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WO2006046337A1 (en) | 2006-05-04 |
JP4352344B2 (en) | 2009-10-28 |
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