JP2011064084A - Windmill device - Google Patents

Windmill device Download PDF

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JP2011064084A
JP2011064084A JP2009213215A JP2009213215A JP2011064084A JP 2011064084 A JP2011064084 A JP 2011064084A JP 2009213215 A JP2009213215 A JP 2009213215A JP 2009213215 A JP2009213215 A JP 2009213215A JP 2011064084 A JP2011064084 A JP 2011064084A
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blade
trailing edge
fin
wind turbine
windmill
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Japanese (ja)
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Yasuo Ueno
上野康男
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Priority to JP2009213215A priority Critical patent/JP2011064084A/en
Priority to US13/266,693 priority patent/US20120039712A1/en
Priority to EP10772174.8A priority patent/EP2428677A4/en
Priority to PCT/JP2010/057745 priority patent/WO2010128656A1/en
Publication of JP2011064084A publication Critical patent/JP2011064084A/en
Pending legal-status Critical Current

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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
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • 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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device capable of remarkably attenuating the noise without deteriorating performance of a windmill device in regard to a power generating windmill device wherein performance is remarkably improved and advanced for practical use, whereas a whirl of an air flow in rear of a rotary shaft is applied to a rotary vane and abnormal vibration and noise occur and interferes practical use of the windmill device. <P>SOLUTION: This windmill device includes a rear edge fin formed from a flexible soft material in a rear edge of a rotary vane having a cross section similar to the shape of the vane. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、風力発電装置、機械的動力源などに使用される風車に関するものであり、航空機の翼と類似の断面を有する所謂揚力型といわれる方式の風車装置に関するものである。   The present invention relates to a windmill used for a wind power generator, a mechanical power source, etc., and relates to a so-called lift type windmill apparatus having a cross section similar to an aircraft wing.

近来、上記方式の風車においては回転翼の空力性能の改善によって大幅な性能向上が実現して、実用化に向けて前進しつつある。 しかるに回転翼の後流に渦が発生することで異常な振動や音を発生することがあり、近隣の住民には騒音障害の原因の一つとなっていた。 小型の風車装置は高音の鋭い音を出し、大型の風車装置は低音の大きな騒音を発生する。 地球温暖化防止に効果の大きい風車装置も実質的にある種の公害の元となってしまうことは望ましくない。   In recent years, wind turbines of the above-mentioned type have achieved a significant performance improvement by improving the aerodynamic performance of the rotor blades, and are moving forward toward practical application. However, vortices in the wake of the rotor blades can cause abnormal vibrations and sounds, which has been one of the causes of noise disturbances for neighboring residents. A small windmill device produces a sharp high-pitched sound, and a large windmill device generates a loud low-pitched noise. It is not desirable that a windmill device having a great effect on the prevention of global warming substantially causes some kind of pollution.

対策として羽根全体を多孔質の材料で形成する方式のものがあるが、小型風車のみに実施可能な方式であり、気流から発生する渦を軽減できるものではなく、効果的にも不充分である。
特願２００６−２４２１９４ As a countermeasure, there is a method of forming the entire blade with a porous material, but it is a method that can be implemented only for small windmills, it can not reduce vortices generated from the airflow, and it is also insufficient effectively .
Japanese Patent Application No. 2006-242194

本発明は、上記背景の下に成立するものであり、本発明の第１の手段は、翼と類似の断面を有する回転翼の後縁に可撓性の柔軟な材料で形成した後縁ヒレを設けた風車装置を提供することである。   The present invention is established under the above background, and the first means of the present invention is a trailing edge fin formed of a flexible material on the trailing edge of a rotor blade having a cross section similar to that of the blade. It is providing the windmill apparatus which provided.

本発明の第２の手段は、水平軸型風車装置の回転翼の先端部を可撓性の柔軟な材料で形成した翼端ヒレを設けた第１の手段記載の風車装置を提供するものである。   According to a second means of the present invention, there is provided a wind turbine device according to the first means provided with a blade tip fin in which a tip of a rotary blade of a horizontal axis type wind turbine device is formed of a flexible material. is there.

本発明の第３の手段は、回転翼の上端部と下端部に回転翼と類似の断面を有する支持アームを具え、該回転翼と支持アームが回転軸に対して略コの字状に取り付けられた垂直軸風車である第１の手段記載の風車装置を提供するものである。   According to a third means of the present invention, a support arm having a cross section similar to that of the rotor blade is provided at the upper end and the lower end of the rotor blade, and the rotor blade and the support arm are attached in a substantially U shape with respect to the rotating shaft. The wind turbine apparatus according to the first means, which is a vertical axis wind turbine, is provided.

本発明は、翼と類似の断面を有する回転翼の後縁に可撓性の柔軟な後縁ヒレを設けた風車装置を提供することによって、回転翼の後縁で発生する気流の乱れの発生を該可撓性の柔軟な後縁ヒレが吸収し、更に回転翼本体への振動の伝達を防止することで風車装置によって発生する騒音を大幅に軽減できる上、風車本体が強度的に弱まるなどの影響を受けるものではないので大型の風車への適用上も問題がない。 また、水平軸型の風車装置においては回転翼の先端部で対風速度が最大になるのでこの部分から発生する翼端渦による騒音の改善が課題となる。 この課題の解決の為には回転翼の先端部を可撓性の柔軟な材料で形成した翼端ヒレを設けることが有効である。 この先端部分は回転中に大きな遠心力が働くので柔軟な材料でも風圧で折れ曲がるようなことは無く、ヘリコプターの回転翼と同様の原理で遠心力とのバランスによって最適な位置で形状を保つことが出来る。 更に、回転翼の上端部と下端部に回転翼と類似の断面を有する支持アームを具え、該回転翼と支持アームが回転軸に対して略コの字状に取り付けられた垂直軸風車に前記の柔軟な後縁ヒレを取り付けた構造を採用することにより、回転翼と類似の断面を有する支持アームの効果で上記の翼端渦の発生も防ぐことが出来る為、騒音低減効果はさらに向上する。 なお、この後縁ヒレ及び翼端ヒレによって風車装置は構造上も空力性能上もマイナス影響の要因となるものはない。   The present invention provides a wind turbine device having a flexible trailing edge fin at the trailing edge of a rotating blade having a cross section similar to that of the blade, thereby generating turbulence of airflow generated at the trailing edge of the rotating blade. The flexible trailing edge fin absorbs the vibration, and further, by preventing transmission of vibration to the rotor blade body, noise generated by the windmill device can be greatly reduced, and the windmill body is weakened in strength, etc. There is no problem in application to large windmills. Further, in the horizontal axis type wind turbine device, the wind speed is maximized at the tip of the rotor blade, so that it becomes a problem to improve the noise due to the blade tip vortex generated from this portion. In order to solve this problem, it is effective to provide a blade tip fin in which the tip of the rotor blade is formed of a flexible material. This tip has a large centrifugal force during rotation, so even a flexible material will not bend by wind pressure, and the shape can be kept at the optimal position by balancing with the centrifugal force in the same principle as the helicopter rotor blades. I can do it. Further, the vertical axis wind turbine includes a support arm having a cross section similar to that of the rotary blade at the upper end and the lower end of the rotary blade, and the rotary blade and the support arm are attached in a substantially U shape with respect to the rotary shaft. By adopting a structure with a flexible trailing edge fin, it is possible to prevent the occurrence of the blade tip vortex by the effect of the support arm having a cross section similar to that of the rotor blade, so that the noise reduction effect is further improved. . The trailing edge fins and the blade tip fins have no negative influence on the wind turbine apparatus in terms of structure and aerodynamic performance.

本発明の構造は、翼と類似の断面を有する回転翼の後縁に可撓性の柔軟な後縁ヒレを取り付けた風車装置を提供するものである。 回転翼自体は従来の構造と変わるものではないが後縁のヒレ取り付け部は鋭いエッジ状を形成するものではない。 後縁部に取り付けられた可撓性の柔軟な後縁ヒレは合成ゴムなどにより形成されたものであり、回転翼とは嵌めこみ、接着などの公知の技術で取り付けられている。 柔軟性を増すためには中空の構造としても良い。   The structure of the present invention provides a windmill device in which a flexible and flexible trailing edge fin is attached to the trailing edge of a rotor blade having a cross section similar to that of the blade. The rotor blade itself is not different from the conventional structure, but the fin attachment portion at the trailing edge does not form a sharp edge. The flexible soft trailing edge fin attached to the rear edge portion is formed of synthetic rubber or the like, and is attached to the rotor blade by a known technique such as fitting or bonding. In order to increase flexibility, a hollow structure may be used.

以下図について本発明の実施例について説明する。
図１は本発明の一実施例の構造を示す断面図である。
図１において、１は本発明における風車装置の回転翼の断面であり、航空機の翼断面と類似の形状をして硬質合成樹脂あるいは金属などで形成され、後縁には合成ゴムなどで形成された可撓性の柔軟な後縁ヒレ２を設けている。 回転翼１の後縁部には溝３が形成され、後縁ヒレ２の前端部には突起４が形成され、突起４の穴５に図示しない棒材を挿入することで回転翼１と後縁ヒレ２を確実に組み合わせることが出来る。 この固定方法は本発明の主旨を限定するものではない。 Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a sectional view showing the structure of an embodiment of the present invention.
In FIG. 1, reference numeral 1 denotes a cross section of a rotor blade of a wind turbine apparatus according to the present invention, which has a shape similar to that of an aircraft wing and is formed of hard synthetic resin or metal, and is formed of synthetic rubber or the like at a trailing edge. A flexible trailing edge fin 2 is provided. A groove 3 is formed at the rear edge of the rotary blade 1, and a protrusion 4 is formed at the front end of the trailing edge fin 2. A rod (not shown) is inserted into the hole 5 of the protrusion 4, so The edge fin 2 can be combined with certainty. This fixing method does not limit the gist of the present invention.

図１において本発明の作用について説明する。 回転翼１には回転中前縁側から風を受けるが、前縁側は曲率半径の大きな滑らかな形状である為に気流は乱れることなく流れる。 しかし、後縁方向に進むに従って境界層が厚くなり乱れ要素が発達してくる。 特に後縁部では一般に鋭いエッジ状態となっている為に強い力が働く。 楽器のリードを吹き鳴らすのと類似した原理で大きな音が発生することがある。 本発明の原理はこのリードの部分をゴムのごとき柔軟な材質にすることで音の発生を防止することが出来るものである。 また、後縁側においては気流の剥離による低い周波数の振動が発生し、回転翼に伝わって共振することによって生ずる騒音もあるが、このような振動も可撓性の柔軟な後縁ヒレ２を通過する間に減衰される為回転翼１が振動することを防止することも出来る。   The operation of the present invention will be described with reference to FIG. The rotor blade 1 receives wind from the leading edge side during rotation, but the leading edge side has a smooth shape with a large radius of curvature, so the airflow flows without being disturbed. However, the boundary layer becomes thicker and the turbulence element develops as it moves toward the trailing edge. In particular, a strong force acts on the rear edge portion because it is generally a sharp edge state. Loud sounds can be produced on a principle similar to that of playing a musical instrument lead. The principle of the present invention is that the generation of sound can be prevented by making the lead portion a flexible material such as rubber. Further, on the trailing edge side, low-frequency vibration is generated due to separation of the air flow, and there is also noise generated by resonating through the rotor blade. Such vibration also passes through the flexible trailing edge fin 2. It is possible to prevent the rotor blade 1 from vibrating because it is damped during the operation.

図２は本発明の他の実施例の構造を示す正面図である。
図２において１１は水平軸型風車装置の回転翼である。回転翼１１には合成ゴムなどで構成された可撓性の柔軟な後縁ヒレ１２が設けられている。 また、回転翼１１の先端部には合成ゴムなどの可撓性の柔軟な材料で形成された翼端ヒレ１３も設けられている。
回転翼１１と後縁ヒレ１２、翼端ヒレ１３との結合方法は図１に示す方法と同様のものである。 また、実質的には後縁ヒレ１２と翼端ヒレ１３は分割されたものではなく一体的に形成されている。 翼端ヒレ１３では対風速度が高いので風速の脈動及び所謂失速制御時などによって回転翼１１のねじれ角と風速との差異により迎角が大きくなったときには強い翼端渦が発生し、そのための振動、騒音が大きくなる。 このような場合、翼端ヒレ１３が可撓性の柔軟な材料で形成されているので上記と同様にその振動、騒音を吸収することが出来る。 尚、回転翼１１と翼端ヒレ１３の結合部は前縁部で外周側、後縁部で内周側に傾斜していることが望ましい。 このようにすると翼端ヒレ１３が風圧でめくれ反ることを防止することが出来る。 FIG. 2 is a front view showing the structure of another embodiment of the present invention.
In FIG. 2, 11 is a rotary blade of a horizontal axis type wind turbine apparatus. The rotor blade 11 is provided with a flexible trailing edge fin 12 made of synthetic rubber or the like. A blade tip fin 13 formed of a flexible material such as synthetic rubber is also provided at the tip of the rotary blade 11.
The method for connecting the rotary blade 11 to the trailing edge fin 12 and the blade tip fin 13 is the same as the method shown in FIG. Further, the trailing edge fin 12 and the wing tip fin 13 are not divided but formed integrally. The tip fin 13 has a high wind speed, so that when the angle of attack becomes large due to the difference between the twist angle of the rotor blade 11 and the wind speed due to wind speed pulsation and so-called stall control, a strong blade tip vortex is generated. Vibration and noise increase. In such a case, since the wing tip fin 13 is formed of a flexible material, the vibration and noise can be absorbed in the same manner as described above. It should be noted that the connecting portion between the rotary blade 11 and the blade tip fin 13 is preferably inclined to the outer peripheral side at the front edge portion and to the inner peripheral side at the rear edge portion. In this way, it is possible to prevent the tip fin 13 from being turned and warped by the wind pressure.

図３は本発明の他の実施例の構造を示す側面図である。
図３において、２１は鉛直軸型風車の回転翼であり、上端部と下端部に回転翼と類似の断面を有する支持アーム２２及び２３を具え、該回転翼２１と支持アーム２２、２３がハブ２４を介して回転軸２５に対して略コの字状に取り付けられている。 ２６は回転翼２１の後縁部に設けられ、合成ゴムなどで構成された可撓性の柔軟な後縁ヒレである。
図３に示す実施例の場合、図２に示す実施例のような翼端渦は支持アーム２２、２３によって抑止され発生することは無いので、後縁ヒレ２６の制振効果のみで充分である。 FIG. 3 is a side view showing the structure of another embodiment of the present invention.
In FIG. 3, reference numeral 21 denotes a rotor blade of a vertical axis type wind turbine, which has support arms 22 and 23 having cross sections similar to those of the rotor blade at the upper end and the lower end, and the rotor blade 21 and the support arms 22 and 23 are hubs. 24 is attached to the rotary shaft 25 in a substantially U shape. A flexible trailing edge fin 26 is provided at the rear edge of the rotary blade 21 and is made of synthetic rubber or the like.
In the case of the embodiment shown in FIG. 3, the blade tip vortex as in the embodiment shown in FIG. 2 is not restrained and generated by the support arms 22, 23, so that only the damping effect of the trailing edge fin 26 is sufficient. .

以上の説明で明らかなごとく、本発明の風車装置は可撓性の柔軟なヒレを設けることによって気流の乱れ及び渦から回転翼に発生する振動、騒音を防止し、静かに回転する風車装置を提供するものであり、小型風車から、大型風車まで、また、水平軸風車にも垂直軸風車にも適応できるものであり、その効果は極めて著しい。   As is apparent from the above description, the wind turbine apparatus of the present invention is provided with a flexible and flexible fin to prevent vibrations and noises generated in the rotor blades from turbulence of the air current and vortices, and a wind turbine apparatus that rotates gently The present invention can be applied to a small wind turbine to a large wind turbine, and can be applied to a horizontal axis wind turbine and a vertical axis wind turbine, and the effect is extremely remarkable.

本発明の一実施例の構造を示す断面図である。It is sectional drawing which shows the structure of one Example of this invention. 本発明の他の実施例の構造を示す正面図である。It is a front view which shows the structure of the other Example of this invention. 本発明の他の実施例の構造を示す側面図である。It is a side view which shows the structure of the other Example of this invention.

１、１１、２１：回転翼
２、１２、２６：後縁ヒレ
３：溝
４：突起
５：穴
１３：翼端ヒレ
２２、２３：支持アーム
２４：ハブ
２５：回転軸 DESCRIPTION OF SYMBOLS 1, 11, 21: Rotor blades 2, 12, 26: Trailing edge fin 3: Groove 4: Projection 5: Hole 13: Blade tip fin 22, 23: Support arm 24: Hub 25: Rotating shaft

Claims (3)

翼と類似の断面を有する回転翼の後縁に可撓性の柔軟な材料で形成した後縁ヒレを設けたことを特徴とする風車装置。   A windmill device comprising a trailing edge fin formed of a flexible material at a trailing edge of a rotary blade having a cross section similar to the blade. 水平軸型風車装置の回転翼の先端部に可撓性の柔軟な材料で形成した翼端ヒレを設けたことを特徴とする請求項１記載の風車装置。   2. A wind turbine apparatus according to claim 1, wherein a blade tip fin made of a flexible material is provided at the tip of the rotary blade of the horizontal axis type wind turbine apparatus. 回転翼の上端部と下端部に回転翼と類似の断面を有する支持アームを具え、該回転翼と支持アームが回転軸に対して略コの字状に取り付けられた垂直軸風車であることを特徴とする請求項１記載の風車装置。   It is a vertical axis windmill provided with support arms having a cross section similar to that of the rotor blades at the upper end and lower end of the rotor blades, and the rotor blades and the support arm are attached in a substantially U shape with respect to the rotation shaft. The windmill device according to claim 1, wherein
JP2009213215A 2009-05-08 2009-09-15 Windmill device Pending JP2011064084A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2009213215A JP2011064084A (en) 2009-09-15 2009-09-15 Windmill device
US13/266,693 US20120039712A1 (en) 2009-05-08 2010-05-06 Vertical axis wind turbine device
EP10772174.8A EP2428677A4 (en) 2009-05-08 2010-05-06 Vertical axis wind turbine device
PCT/JP2010/057745 WO2010128656A1 (en) 2009-05-08 2010-05-06 Vertical axis wind turbine device

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JP2009213215A JP2011064084A (en) 2009-09-15 2009-09-15 Windmill device

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55153870A (en) * 1979-05-18 1980-12-01 Tomiji Takayama Vane body for vertical-shaft windmill
JPS6393477U (en) * 1986-12-09 1988-06-16
JP2003120510A (en) * 2001-10-12 2003-04-23 Mitsubishi Heavy Ind Ltd Windmill device
US20070025858A1 (en) * 2005-07-29 2007-02-01 General Electric Company Methods and apparatus for producing wind energy with reduced wind turbine noise
JP2008540922A (en) * 2005-05-13 2008-11-20 ザ リージェンツ オブ ザ ユニバーシティ オブ カリフォルニア Vertical axis wind turbine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55153870A (en) * 1979-05-18 1980-12-01 Tomiji Takayama Vane body for vertical-shaft windmill
JPS6393477U (en) * 1986-12-09 1988-06-16
JP2003120510A (en) * 2001-10-12 2003-04-23 Mitsubishi Heavy Ind Ltd Windmill device
JP2008540922A (en) * 2005-05-13 2008-11-20 ザ リージェンツ オブ ザ ユニバーシティ オブ カリフォルニア Vertical axis wind turbine
US20070025858A1 (en) * 2005-07-29 2007-02-01 General Electric Company Methods and apparatus for producing wind energy with reduced wind turbine noise

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