JP2004060577A - Savonius windmill - Google Patents

Savonius windmill Download PDF

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Publication number
JP2004060577A
JP2004060577A JP2002222276A JP2002222276A JP2004060577A JP 2004060577 A JP2004060577 A JP 2004060577A JP 2002222276 A JP2002222276 A JP 2002222276A JP 2002222276 A JP2002222276 A JP 2002222276A JP 2004060577 A JP2004060577 A JP 2004060577A
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Prior art keywords
arc
wind
impeller
shaped cross
pair
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JP2002222276A
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JP4090810B2 (en
Inventor
Tokuyuki Kono
河野　徳之
Jiro Tsukahara
塚原　次郎
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Daiwa House Industry Co Ltd
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Daiwa House Industry Co Ltd
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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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Abstract

<P>PROBLEM TO BE SOLVED: To provide a Savonius windmill capable of avoiding strong wind without being damaged even under the strong wind and protecting a generator even when used for wind power generation. <P>SOLUTION: A pair of vanes 3 and 3 of an arc shape in cross section fitted to an impeller 1 are moved from eccentric positions to a rotating center position 6. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、例えば風力発電などに用いられるサボニウス型風車に関する。
【０００２】
【従来の技術】
サボニウス型風車は、羽根車が風力によって効率良く回転するため、設計耐風速を越えるような強風下では、過度に高速回転をしてしまい、強度的に耐えられず、破損してしまうことがある。また、サボニウス型風車を例えば風力発電に用いるような場合は、強風時の発電機保護の対策を講じておく必要もある。
【０００３】
本発明は、このような背景において、強風下でも破損することなくそれをかわすことができ、また、風力発電に用いる場合にも発電機を保護することができるサボニウス型風車を提供することを課題とする。
【０００４】
【課題を解決するための手段】
上記の課題は、羽根車に備えられた対の円弧状断面羽根がそれぞれ、偏心位置から回転中心位置の側に移動することができるようになされていることを特徴とするサボニウス型風車によって解決される。
【０００５】
この風車では、強風下において、対の円弧状断面羽根がそれぞれ偏心位置から回転中心位置の側に移動することで、強風をかわし、それによって破損するのを防がれる。また、風力発電に用いる場合には、羽根車がこのように強風をかわせることによって過度の高速回転を抑えられ、発電機を保護することができる。
【０００６】
また、上記の課題は、羽根車に備えられた対の円弧状断面羽根がそれぞれ、その円弧方向の中間部位置においてヒンジで内向きに屈折し円弧方向の両端が接近した閉じ状態になることができるようになされていることを特徴とするサボニウス型風車によっても解決される。
【０００７】
この風車では、強風下において、対の円弧状断面羽根がそれぞれ内向きに屈折し円弧方向の両端が接近した閉じ状態になることで、強風をかわし、破損するのを防がれる。また、風力発電に用いるような場合には、羽根車がこのように強風をかわせることで過度の高速回転を抑えられ、発電機を保護することができる。
【０００８】
【発明の実施の形態】
次に、本発明の実施形態を図面に基づいて説明する。
【０００９】
図１（イ）に示す第１実施形態のサボニウス型風車は風力発電に用いられるもので、１は羽根車であり、図示しないフレームに回転自在に保持され、この羽根車１の回転が発電部２に伝えられて発電し、その発電した電気が蓄電部９に蓄えられるようになされている。
【００１０】
上記の羽根車１は、対の円弧状断面羽根３，３と、上下の円板４，４とを備えている。そして、上下の円板４，４にはそれぞれ、図１（ロ−１）（ロ−２）に示すように、対のレール５，５が回転中心位置６を挟む両側を互いに平行に延ばされていると共に、各円弧状断面羽根３，３の上下の端部において円周方向の両端部にピン７…が突設されており、一方の円弧状断面羽根３のピン７…が、回転中心位置６を挟む一方のレール５と係合し、また、もう一方の円弧状断面羽根３のピン７…が、回転中心位置６を挟むもう一方のレール５と係合することで、対の円弧状断面羽根３，３がそれぞれ、風力を受けて羽根車１を回転させる偏心位置と、風力による回転をしないあるいは抑えられる回転中心位置６の側との間で行き来をすることができるようになされている。
【００１１】
そして、対の円弧状断面羽根３，３を偏心位置に保持したり、回転中心位置６の側に移動させたり、回転中心位置６の側に保持したりする駆動手段が、図示しないけれども備えられている。この駆動手段としては、例えば、円板４側に固定した駆動手段としてのシリンダーのロッドを円弧状断面羽根３のピン７と連結した構造のものなどを用いることができる。
【００１２】
その場合に、上記のようなシリンダー等の駆動手段を、スイッチなどの操作部を操作してマニアルでコントロールしたり、あるいは、風速や羽根車１の回転数を検知センサーで検知し制御手段がセンサーの検知信号に基づいて自動でコントロールするようになどなされていてよい。
【００１３】
あるいはまた、通常時は対の円弧状断面羽根３，３がバネ等の付勢手段による付勢力で偏心位置に保持され、強風時には羽根車１の回転遠心力や風力による流体力学的な力などによって円弧状断面羽根３，３が偏心位置から回転中心位置の側に移動していき、これらの力の釣り合い関係やロック機構などによって円弧状断面羽根３，３が回転中心位置６の側に保持されるようにする機構が用いられてもよい。もちろん、これらに限らず種々の機構が用いられてよい。
【００１４】
上記のサボニウス型風車では、図２（イ）に示すように、通常の風Ｗ１が吹いている時は、対の円弧状断面羽根３，３が偏心位置に位置保持されることによって、羽根車１は効率良く回転し、図１（イ）に示す発電部２も効率良く発電する。そして、強風Ｗ２時には、図２（ロ）に示すように、対の円弧状断面羽根３，３が回転中心位置６の側に移動しその位置に位置保持されることによって、強風をかわし、羽根車１の回転も抑えられて破損が防がれる。これによりまた、強風時の発電部２のローターの回転も抑えられ、発電部２も保護される。
【００１５】
図３に示す第２実施形態のサボニウス型風車に用いられている羽根車１は、円弧状断面羽根３，３のそれぞれが、円弧方向の中央部の一箇所において二つの分割羽根材３ａ，３ａに分割され、これら分割羽根材３ａ，３ａがヒンジ結合３ｂされており、それによって、円弧状に開いた状態から、内向きに屈折し、円弧方向の両端が接近した閉じ状態となることができるようになされている。なお、この動作を実現するため、上下の円板４，４にレール５…が設けられ、これらレール５…に各円弧状断面羽根３，３のピン７…が移動自在に係合されている。
【００１６】
そして、本実施形態では、各円弧状断面羽根３には、これらを開き状態に保持するバネなどの付勢手段が備えられると共に、分割羽根材３ａ，３ａ間に羽根閉じ手段としてのパラシュート８が備えられている。このパラシュート８は、円弧状断面羽根３の凹所面に通常の風が作用しただけでは開かず、強風による風圧が作用してはじめて開き、それによって、強風時に、円弧状断面羽根３，３を付勢手段による付勢力に抗して閉じ状態にする誘導力を生じさせるものである。
【００１７】
上記のサボニウス型風車では、図４（イ）に示すように、通常の風Ｗ１が吹いている時は、対の円弧状断面羽根３，３がそれぞれ円弧状に開いた状態に保持されることによって、羽根車１は効率良く回転し、発電部も効率良く発電する。そして、強風Ｗ２時には、図４（ロ）に示すように、その風圧によって、パラシュート８が開き、その閉じ誘導力によって左右の分割羽根材３ａ，３ａが内向きに屈折し円弧状断面羽根３，３が閉じた状態になる。それによって、強風がかわされ、羽根車１の回転も抑えられて破損が防がれる。これによりまた、強風時の発電部のローターの回転も抑えられ、発電部も保護される。
【００１８】
なお、第２実施形態のタイプにおいて、通常時は対の円弧状断面羽根３，３がバネ等の付勢手段による付勢力で開き状態に保持され、強風時には円弧状断面羽根３，３が、その回転遠心力や風力によるその他の流体力学的な力などによって開き状態から閉じ状態へと変化していき、これらの力の釣り合い関係やロック機構などによって閉じ状態に保持されるようになされた機構などが用いられてもよい。
【００１９】
もちろん、各円弧状断面羽根３，３を開き状態から閉じ状態にするシリンダーなどの駆動手段を備えさせ、この駆動手段を、マニアルでコントロールしたり、あるいは、風速や羽根車１の回転数を検知センサーで検知し制御手段がセンサーの検知信号に基づいて自動でコントロールするようになどなされていてもよいし、開き状態から閉じ状態にする手段に特段の制限はない。
【００２０】
また、各円弧状断面羽根３，３が、強風時にヒンジ結合部３ｂで屈折して周方向の両端が接近状態となればよく、各円弧状断面羽根３の閉じた時の位置や閉じた時の向きに特段の制限はない。また、各円弧状断面羽根は、周方向の２箇所以上の位置でヒンジ結合されたものであってもよい。
【００２１】
以上に、本発明の実施形態を示したが、本発明はこれに限られるものではなく、発明思想を逸脱しない範囲で、各種の変更が可能である。例えば、上記の実施形態では、本発明のサボニウス型風車が風力発電に用いられる場合を示しているが、風力発電以外の用途に用いられてもよい。
【００２２】
【発明の効果】
本発明は、以上のとおりのものであるから、強風下でも破損することなくそれをかわすことができ、また、風力発電に用いる場合にも発電機を保護することができる。
【図面の簡単な説明】
【図１】第１実施形態のサボニウス型風車を示すもので、図（イ）は側面図、図（ロ−１）は羽根車の上部を示す分解斜視図、図（ロ−２）は羽根車の下部を示す分解斜視図である。
【図２】図（イ）は通常の風が吹いている時の羽根車の平面断面図、図（ロ）は強風時の羽根車の平面断面図である。
【図３】第２実施形態のサボニウス型風車を示すもので、羽根車の分解斜視図である。
【図４】図（イ）は通常の風が吹いている時の羽根車の平面断面図、図（ロ）は強風時の羽根車の平面断面図である。
【符号の説明】
１…羽根車
２…発電部
３…円弧状断面羽根
３ｂ…ヒンジ
６…回転中心位置[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a Savonius type wind turbine used for wind power generation, for example.
[0002]
[Prior art]
Savonius type wind turbines rotate efficiently due to wind force, so they rotate excessively at high speeds under strong winds exceeding the design wind speed, and may not be able to withstand strength and may be damaged. . Further, when the Savonius type wind turbine is used for wind power generation, for example, it is necessary to take measures to protect the generator in a strong wind.
[0003]
In this background, an object of the present invention is to provide a Savonius type wind turbine that can dodge it even in a strong wind without being damaged and that can protect the generator even when used for wind power generation. And
[0004]
[Means for Solving the Problems]
The above-mentioned problem is solved by a Savonius type wind turbine characterized in that a pair of arc-shaped cross-section blades provided in an impeller can move from an eccentric position to a rotation center position side. You.
[0005]
In this wind turbine, the pair of arc-shaped cross-section blades respectively move from the eccentric position to the rotation center position under a strong wind, thereby avoiding the strong wind and thereby preventing damage. In addition, when used for wind power generation, excessive high-speed rotation can be suppressed by applying a strong wind to the impeller in this way, and the generator can be protected.
[0006]
In addition, the above problem is that a pair of arc-shaped cross-section blades provided in the impeller are each bent inward by a hinge at an intermediate position in the arc direction and are closed at both ends in the arc direction. It is also solved by a Savonius type windmill characterized by being made possible.
[0007]
In this windmill, under a strong wind, the pair of arc-shaped cross-section blades are refracted inward, respectively, so that both ends in the arc direction are close to each other, thereby avoiding a strong wind and preventing breakage. In addition, in a case where the impeller is used for wind power generation, excessive high-speed rotation can be suppressed by applying a strong wind to the impeller as described above, and the generator can be protected.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings.
[0009]
The Savonius type windmill according to the first embodiment shown in FIG. 1A is used for wind power generation. Reference numeral 1 denotes an impeller, which is rotatably held by a frame (not shown). 2 to generate power, and the generated power is stored in the power storage unit 9.
[0010]
The impeller 1 includes a pair of arc-shaped blades 3 and 3 and upper and lower disks 4 and 4. As shown in FIGS. 1 (b-1) and (b-2), the pair of rails 5, 5 extend on both sides of the rotation center position 6 in parallel with each other on the upper and lower disks 4, 4, respectively. In addition, at the upper and lower ends of each of the arc-shaped cross-section blades 3, pins 7 are projected at both ends in the circumferential direction, and the pins 7 of one of the arc-shaped cross-section blades 3 rotate. The other rail 5 sandwiching the center position 6 is engaged with the other rail 5 sandwiching the rotation center position 6, and the pin 7 of the other arc-shaped cross-section blade 3 is engaged with the other rail 5 sandwiching the center position 6. Each of the arc-shaped cross-section blades 3 and 3 can move back and forth between the eccentric position where the impeller 1 is rotated by receiving the wind and the rotation center position 6 where the rotation is not or suppressed by the wind. Has been done.
[0011]
Although not shown, driving means for holding the pair of arc-shaped cross-section blades 3 and 3 at the eccentric position, moving the pair to the rotation center position 6, and holding the pair at the rotation center position 6 are provided. ing. As this driving means, for example, one having a structure in which a rod of a cylinder serving as a driving means fixed to the disk 4 side is connected to the pin 7 of the blade 3 having an arc-shaped cross section can be used.
[0012]
In this case, the driving means such as the cylinder is controlled manually by operating an operation unit such as a switch, or the wind speed and the rotation speed of the impeller 1 are detected by a detection sensor. May be automatically controlled on the basis of the detection signal.
[0013]
Or, normally, the pair of arc-shaped blades 3 and 3 are held at the eccentric position by the urging force of the urging means such as a spring, and the like, and the centrifugal force of the impeller 1 and the hydrodynamic force by the wind force in a strong wind. The arc-shaped cross-section blades 3 and 3 move from the eccentric position to the rotation center position side, and the arc-shaped cross-section blades 3 and 3 are held at the rotation center position 6 side by a balance relationship of these forces and a lock mechanism. A mechanism may be used to ensure this is done. Of course, not limited to these, various mechanisms may be used.
[0014]
In the above Savonius type windmill, as shown in FIG. 2A, when the normal wind W1 is blowing, the pair of arc-shaped cross-section blades 3 and 3 are held at the eccentric position, so that the impeller 1 rotates efficiently, and the power generation unit 2 shown in FIG. At the time of the strong wind W2, as shown in FIG. 2B, the pair of arc-shaped cross-section blades 3 and 3 move toward the rotation center position 6 and are held at that position, thereby avoiding the strong wind. The rotation of the car 1 is also suppressed, and damage is prevented. This also suppresses the rotation of the rotor of the power generation unit 2 in a strong wind, and protects the power generation unit 2 as well.
[0015]
In the impeller 1 used in the Savonius type wind turbine of the second embodiment shown in FIG. 3, each of the arc-shaped cross-section blades 3, 3 has two divided blade members 3a, 3a at a central portion in the arc direction. The divided blade members 3a, 3a are hinged together 3b, so that they can be bent inward from a state opened in an arc shape to a closed state in which both ends in the arc direction are close to each other. It has been done. In order to realize this operation, rails 5 are provided on the upper and lower discs 4, 4, and the pins 7 of the respective blades 3, 3 are movably engaged with these rails 5. .
[0016]
In the present embodiment, each arc-shaped blade 3 is provided with a biasing means such as a spring for holding them in an open state, and a parachute 8 as blade closing means is provided between the divided blade members 3a. Provided. The parachute 8 is not opened only when the normal wind acts on the concave surface of the arc-shaped cross-section blade 3, but is opened only when a wind pressure due to the strong wind acts. This is to generate an inducing force to bring the closed state against the urging force of the urging means.
[0017]
In the above Savonius type wind turbine, as shown in FIG. 4 (a), when the normal wind W1 is blowing, the pair of arc-shaped cross-section blades 3, 3 are held in a state of being respectively opened in an arc shape. As a result, the impeller 1 rotates efficiently, and the power generation unit also generates power efficiently. At the time of the strong wind W2, as shown in FIG. 4 (b), the parachute 8 is opened by the wind pressure, and the left and right divided blade members 3a, 3a are bent inward by the closing induction force, so that the arc-shaped cross-section blade 3, 3 is closed. As a result, strong wind is avoided, and rotation of the impeller 1 is also suppressed, thereby preventing breakage. This also suppresses the rotation of the rotor of the power generation unit during strong winds, and protects the power generation unit.
[0018]
In the type of the second embodiment, the pair of arc-shaped cross-section blades 3 and 3 are normally held open by the urging force of the urging means such as a spring. A mechanism that changes from an open state to a closed state due to its rotational centrifugal force and other hydrodynamic forces due to wind force, and is maintained in a closed state by a balance between these forces and a lock mechanism etc. Etc. may be used.
[0019]
Of course, a drive means such as a cylinder for bringing the respective arc-shaped cross-section blades 3 and 3 from the open state to the closed state is provided. The control means may be automatically controlled based on the detection signal from the sensor, and the control means for changing from the open state to the closed state is not particularly limited.
[0020]
Further, it is only necessary that each of the arc-shaped cross-section blades 3 and 3 bends at the hinge joint 3b in a strong wind to bring both ends in the circumferential direction close to each other. There is no particular restriction on the direction of the. Further, each arc-shaped cross-section blade may be hinged at two or more positions in the circumferential direction.
[0021]
Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various changes can be made without departing from the spirit of the invention. For example, in the above embodiment, the case where the Savonius type windmill of the present invention is used for wind power generation is shown, but it may be used for applications other than wind power generation.
[0022]
【The invention's effect】
Since the present invention is as described above, it is possible to dodge it without being damaged even in a strong wind, and to protect the generator even when used for wind power generation.
[Brief description of the drawings]
FIG. 1 shows a Savonius type wind turbine according to a first embodiment, in which FIG. 1A is a side view, FIG. 1B is an exploded perspective view showing an upper part of an impeller, and FIG. It is an exploded perspective view showing the lower part of the car.
FIG. 2A is a plan sectional view of the impeller when normal wind is blowing, and FIG. 2B is a plan sectional view of the impeller when strong wind is blowing.
FIG. 3 is an exploded perspective view of an impeller showing a Savonius type wind turbine of a second embodiment.
FIG. 4A is a plan sectional view of the impeller when normal wind is blowing, and FIG. 4B is a plan sectional view of the impeller when strong wind is blowing.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Impeller 2 ... Power generation part 3 ... Arc-shaped cross-section blade 3b ... Hinge 6 ... Rotation center position

Claims (2)

羽根車に備えられた対の円弧状断面羽根がそれぞれ、偏心位置から回転中心位置の側に移動することができるようになされていることを特徴とするサボニウス型風車。A Savonius type windmill characterized in that a pair of arc-shaped cross-section blades provided in an impeller can move from an eccentric position to a rotation center position side. 羽根車に備えられた対の円弧状断面羽根がそれぞれ、その円弧方向の中間部位置においてヒンジで内向きに屈折し円弧方向の両端が接近した閉じ状態になることができるようになされていることを特徴とするサボニウス型風車。The pair of arc-shaped cross-section blades provided on the impeller are each bent inward at a hinge at an intermediate position in the arc direction so that both ends in the arc direction can be closed. Savonius type windmill characterized by the following.
JP2002222276A 2002-07-31 2002-07-31 Savonius type windmill Expired - Fee Related JP4090810B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2264859A1 (en) * 2004-07-30 2007-01-16 Joaquin Siguenza Aguiar Aeolian turbine for generating electrical energy, has cylindrical body that turns due to penetrating water and air, and starts vanes in inertia plates at ends of cylindrical body to operate alternators and generate electrical energy
TWI425145B (en) * 2010-11-15 2014-02-01 Hiwin Mikrosystem Corp Vertical wind power generator with automatically retractable blades
DE102012014627A1 (en) 2012-07-17 2014-02-06 Christiane Bareiß Segovia Conical rotor for energy generation for charging batteries in transport with electric and hybrid drive, has round base plate, which has top profile with three alternate shafts and three troughs, where base plate is opened at its center

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101723108B1 (en) * 2015-10-01 2017-04-05 연세대학교 원주산학협력단 Savonius-type vertical axis Wind Turbine including a device for controlling the gap width between turbine blades

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2264859A1 (en) * 2004-07-30 2007-01-16 Joaquin Siguenza Aguiar Aeolian turbine for generating electrical energy, has cylindrical body that turns due to penetrating water and air, and starts vanes in inertia plates at ends of cylindrical body to operate alternators and generate electrical energy
TWI425145B (en) * 2010-11-15 2014-02-01 Hiwin Mikrosystem Corp Vertical wind power generator with automatically retractable blades
DE102012014627A1 (en) 2012-07-17 2014-02-06 Christiane Bareiß Segovia Conical rotor for energy generation for charging batteries in transport with electric and hybrid drive, has round base plate, which has top profile with three alternate shafts and three troughs, where base plate is opened at its center

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