JP2012067724A

JP2012067724A - Windmill

Info

Publication number: JP2012067724A
Application number: JP2010215323A
Authority: JP
Inventors: Yoshisuke Nagaba; 吉資長場
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-09-27
Filing date: 2010-09-27
Publication date: 2012-04-05
Anticipated expiration: 2030-09-27
Also published as: JP5325860B2

Abstract

PROBLEM TO BE SOLVED: To provide a windmill which is light weight and yet secures high strength, thereby having improved power generation efficiency, and stably supplies electric power as a result.SOLUTION: The windmill 1 includes: a rotary shaft 4 that is connected to a generator unit 10 having a generator; a hub part 6 that is mounted around the shaft of the rotary shaft 4; rims 7 that are connected to the hub part 6 with a connecting member and provided in a pair in the axial direction X of the rotary shaft 4; and wind receiving parts 9 spanned between connecting members adjacent in the axial direction X of the rotary shaft 4. The connecting members are formed of spokes 8, 8A that are radially arranged from the hub part 6 over the rims 7. Consequently, against drag generated by having a load of constituent members or by receiving wind F, tension of the radially arranged spokes 8, 8A acts and makes them dispersed. Thus, despite the structure composed of thin wires aimed at light weight, a large scale is possible without having any problem in the strength.

Description

本発明は、風力発電に用いられる風車に関する。 The present invention relates to a windmill used for wind power generation.

従来より、風力発電は、発電効率を上げる観点から大型化が求められており、風車の場合は、風車翼、軸系、発電装置等の各構成部品の軽量化が図られている。しかし、大型化に伴う重量増を解消することは容易でなく、軽量化による強度低下、さらには大型化による製造コストの上昇など、実現には困難を極めていた。 Conventionally, wind power generation has been required to increase in size from the viewpoint of increasing power generation efficiency, and in the case of a windmill, each component such as a windmill blade, a shaft system, and a power generation device has been reduced in weight. However, it is not easy to eliminate the increase in weight due to the increase in size, and it has been extremely difficult to realize such as a decrease in strength due to weight reduction and an increase in manufacturing cost due to increase in size.

そこで、発電機と、これに連結連動させる回転軸と、回転軸と同軸の所定径周上に所定間隔で配置された複数の風杯と、各風杯と回転軸とを連結するスポークにて成る風車体を備え、周方向に隣接する風杯間を連結する可撓性の張力体を有するとした風力発電装置が提案されている（例えば特許文献１）。 Therefore, a generator, a rotating shaft connected to and linked to the generator, a plurality of cups arranged at predetermined intervals on a predetermined diameter circumference coaxial with the rotating shaft, and spokes connecting each cup and the rotating shaft. There has been proposed a wind turbine generator having a flexible body that includes a wind vehicle body and that connects between adjacent cups in the circumferential direction (for example, Patent Document 1).

また、風車の構成部品の一つである風車翼を軽量化するために、プラスチック発泡体を強化繊維プラスチックで挟んだサンドイッチ構造を特徴とする外皮により強度向上を図るとした風車翼が提案されている（例えば、特許文献２）。 Also, in order to reduce the weight of wind turbine blades, which are one of the components of wind turbines, wind turbine blades have been proposed that aim to improve strength by an outer skin characterized by a sandwich structure in which a plastic foam is sandwiched between reinforcing fiber plastics. (For example, Patent Document 2).

特開２００３−２３２２７４号公報JP 2003-232274 A 特開平０７−２７９８１８号公報Japanese Patent Application Laid-Open No. 07-279818

上記特許文献１に記載された風力発電装置によれば、各風杯に働く力が均等化され、風車体の軽量化が実現し、小さい風力においてもスムーズに回転し、発電を得ることができる風力発電装置を得ることができるが、各風杯に働く力を均等にするために、隣接する風杯間を張力体で連結しなければならず、張力体をスポークに巻き付けるなどする必要があるため、設置作業が煩雑となる。また、回転軸の周方向からの風向きに対応するものであり、他方向からの風力に風向検出手段がないと対応できないという問題がある。 According to the wind turbine generator described in Patent Document 1, the force acting on each cup is equalized, the weight of the wind body is realized, and even a small wind force can rotate smoothly to obtain power generation. A wind power generator can be obtained, but in order to equalize the force acting on each cup, the adjacent cups must be connected with a tension body, and the tension body needs to be wound around the spoke. Therefore, installation work becomes complicated. Moreover, it corresponds to the wind direction from the circumferential direction of the rotating shaft, and there is a problem that the wind force from the other direction cannot be dealt with without wind direction detecting means.

また、上記特許文献２に記載された風車翼では、構成中に強度材料となる主桁を用いているために、主桁の厚肉化は抑えられているものの、発電効率の向上には依然として軽量化が必要である。 Further, in the wind turbine blade described in Patent Document 2, since the main girder that is a strength material is used in the configuration, the main girder is prevented from being thickened. Weight reduction is necessary.

本発明は上記問題点に鑑み、軽量でありながら高い強度を確保することで発電効率を向上し、安定して電力を供給できる風車を提供することを目的とする。 In view of the above problems, an object of the present invention is to provide a windmill capable of improving power generation efficiency and ensuring stable power supply by ensuring high strength while being lightweight.

本発明の請求項１の発明は、発電機と連結される回転軸と、この回転軸の軸周りに取付けられるハブ部と、前記ハブ部と連結部材により連結され前記回転軸の軸方向に一対で設けたリム部と、前記回転軸の軸方向に隣合う前記連結部材間に張設される受風部とを備える風車において、前記連結部材が、前記ハブ部から前記リム部にかけて放射状に配置されるスポーク部により形成されることを特徴とする。 According to a first aspect of the present invention, there is provided a rotating shaft connected to the generator, a hub portion attached around the rotating shaft, a pair connected to the hub portion by a connecting member in the axial direction of the rotating shaft. And a wind receiving portion stretched between the connecting members adjacent to each other in the axial direction of the rotating shaft, wherein the connecting members are arranged radially from the hub portion to the rim portion. It is characterized by being formed by spoke parts.

本発明の請求項２の発明は、前記スポーク部が、前記回転軸の軸方向と直交する水平軸に対して所定角度に傾いて設けられることを特徴とする。 The invention of claim 2 of the present invention is characterized in that the spoke portion is provided to be inclined at a predetermined angle with respect to a horizontal axis perpendicular to the axial direction of the rotating shaft.

本発明の請求項３の発明は、前記受風部が、柔軟性を有するシート部材からなることを特徴とする。 The invention of claim 3 of the present invention is characterized in that the wind receiving portion is made of a flexible sheet member.

請求項１の発明によれば、構成部材の荷重や、風を受けることにより発生する抗力に対抗して、放射状に配置されたスポーク部の引張りが作用し、これらを分散させることができるので、軽量化の図られた細い線材により構成されてあっても、強度面に何ら問題もなく大型化することができる。 According to the invention of claim 1, since the tensile force of the spoke portions arranged radially acts against the drag generated by receiving the load of the component members and the wind, these can be dispersed. Even if it is made of a thin wire material that is reduced in weight, it can be enlarged without any problem in strength.

請求項２の発明によれば、受風部が効率よく風を受けることができ、風向きが変わった場合であっても安定して対応できるので、発電効率の向上を図ることができる。 According to the second aspect of the present invention, the wind receiving portion can receive wind efficiently, and even when the wind direction changes, it is possible to cope with it stably, so that the power generation efficiency can be improved.

請求項３の発明によれば、従来の風車翼と比べて簡素な構成となるためコスト削減を図ることができると共に、金属板で形成される受風部よりも軽量化され、更には受風部の破損等による部品交換を現場にて簡便に行うことができる。 According to the invention of claim 3, since it has a simple configuration compared to the conventional wind turbine blade, the cost can be reduced, and the weight is lighter than the wind receiving portion formed of a metal plate. Parts replacement due to damage of the parts can be easily performed at the site.

本発明の実施例を示す風車の側面図である。It is a side view of the windmill which shows the Example of this invention. 同上、風車の正面図である。It is a front view of a windmill same as the above. 同上、風車の側面図における部分拡大図である。It is the elements on larger scale in the side view of a windmill same as the above. 同上、リム部と引張部材との連結状態を示す平面図である。It is a top view which shows the connection state of a rim | limb part and a tension member same as the above. 同上、リム部とスポーク部との連結状態を示す平面図と側面図である。It is the top view and side view which show the connection state of a rim | limb part and a spoke part same as the above. 同上、風車の平面図である。It is a top view of a windmill same as the above. 同上、風車の正面図における部分拡大図である。It is a partial enlarged view in a front view of a windmill same as the above.

以下、添付図面を参照しながら、本発明の好適な実施例について説明する。 Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

図１乃至図７は、本発明の実施例を示すものである。 1 to 7 show an embodiment of the present invention.

先ず、本実施例における風車１の構成について説明すると、本実施例における風車１は、支柱たるタワー２と、このタワー２の頂部に軸支されるナセル３と、このナセル３に接続される回転軸４と、回転軸４を回転自在に支持する軸受け５と、回転軸４の軸周りに取付けられるハブ部６と、ハブ部６と連結部材を介して連結するリム部７，７Ａと、回転軸４を中心にハブ部６からリム部７にかけて放射状に配置される連結部材たるスポーク部８，８Ａと、軸方向に隣合うスポーク部８，８Ａ間に張設される布製部材等からなる受風部９とを備えて成るものである。 First, the configuration of the wind turbine 1 in this embodiment will be described. The wind turbine 1 in this embodiment includes a tower 2 as a support, a nacelle 3 pivotally supported on the top of the tower 2, and a rotation connected to the nacelle 3. A shaft 4, a bearing 5 that rotatably supports the rotating shaft 4, a hub portion 6 attached around the rotating shaft 4, rim portions 7 and 7 A connected to the hub portion 6 via a connecting member, and rotation The spokes 8 and 8A, which are connecting members arranged radially from the hub 6 to the rim 7 with the shaft 4 as the center, and the fabric members and the like stretched between the spokes 8 and 8A adjacent in the axial direction. A wind portion 9 is provided.

これらのうち、本実施例におけるナセル３は、発電機、増速機、およびブレーキ等の動力伝達装置（図示しない）を収納した発電機ユニット10から成る。また、ハブ部６は、外周に所定間隔をおいて挿通孔11が形成されており、この挿通孔11には、スポーク部８，８Ａの他端13が挿通されることで連結するものとしている。尚、このハブ部６は、スポーク部８，８Ａの取付け具として機能するほか、回転軸４を支持する軸受けとしても機能しているものとする。 Among these, the nacelle 3 in the present embodiment is composed of a generator unit 10 that houses a power transmission device (not shown) such as a generator, a speed increaser, and a brake. In addition, the hub portion 6 has an insertion hole 11 formed at a predetermined interval on the outer periphery, and is connected to the insertion hole 11 by inserting the other end 13 of the spoke portions 8 and 8A. . The hub portion 6 functions not only as an attachment for the spoke portions 8 and 8A but also as a bearing for supporting the rotating shaft 4.

また、ハブ部６とリム部７を連結するスポーク部８，８Ａは、耐腐食性を有し高強度なステンレス鋼材や炭素繊維複合材、又は軽量なアルミ材等からなり、一端12をリム部７と接続し、他端13をハブ部６と接続するよう構成されている。具体的には、リム部７と連結されるスポーク部８，８Ａの一端12側が、スポーク部本体たる胴部14と、スポーク部８の先端15をリム部７側へ向けるように曲げて形成されるエルボ部16と、先端15に設けられたヘッド部17とを備えて成り、また、ハブ部６と連結されるスポーク部８，８Ａの他端13側が、スポーク部本体たる胴部14と、胴部14よりも大径に形成されて先端に螺子が切られたヘッド部18を備えて成るものとする。そして、スポーク部８，８Ａは、ハブ部６の周面であって回転軸４の軸方向前後に夫々配置されて取付けられる。このうち、前側に配置されるスポーク部８は、ハブ部６の前側端部19付近に位置し、ハブ部６の後側に配置されるスポーク部８Ａは、ハブ部６の後側端部20付近に位置している。すなわち、本実施例では、スポーク部８，８Ａの他端13側を回転軸４の軸方向Ｘであってハブ部６の両端部19，20付近に夫々設け、これらが回転軸４を中心としたハブ部６の周面に放射状となるよう配置される。また、回転軸４の軸方向Ｘに隣合うスポーク部８，８Ａの他端13，13は、ハブ部６の円周方向における略同一位置に連結されるものとする。 The spoke portions 8, 8A connecting the hub portion 6 and the rim portion 7 are made of a corrosion-resistant high strength stainless steel material, carbon fiber composite material, lightweight aluminum material, or the like, and one end 12 is connected to the rim portion. 7, and the other end 13 is connected to the hub portion 6. Specifically, the one end 12 side of the spoke portions 8 and 8A connected to the rim portion 7 is formed by bending so that the trunk portion 14 as the spoke portion main body and the tip 15 of the spoke portion 8 face the rim portion 7 side. And the other end 13 side of the spoke portions 8 and 8A connected to the hub portion 6 is a body portion 14 as a spoke portion main body, and an elbow portion 16 and a head portion 17 provided at the distal end 15. It is assumed that the head portion 18 is formed to have a diameter larger than that of the body portion 14 and is threaded at the tip. The spoke portions 8, 8 A are arranged and attached to the peripheral surface of the hub portion 6 and in the axial direction of the rotating shaft 4. Among these, the spoke portion 8 disposed on the front side is located in the vicinity of the front end portion 19 of the hub portion 6, and the spoke portion 8 A disposed on the rear side of the hub portion 6 is the rear end portion 20 of the hub portion 6. Located in the vicinity. That is, in the present embodiment, the other end 13 side of the spoke portions 8, 8 A is provided in the axial direction X of the rotating shaft 4 and in the vicinity of both end portions 19, 20 of the hub portion 6, and these are centered on the rotating shaft 4. It arrange | positions so that it may become radial on the surrounding surface of the hub part 6 made. The other ends 13 and 13 of the spoke portions 8 and 8A adjacent to the axial direction X of the rotating shaft 4 are connected to substantially the same position in the circumferential direction of the hub portion 6.

また、リム部７は、外周に薄板状のリブ部21が形成されており、このリブ部21にはスポーク部８，８Ａの一端12が挿通される挿通孔22が形成されている。本実施例におけるリム部７の挿通孔22は、スポーク部８，８Ａの一端12に形成されるヘッド部17が通る大きさの径で形成される大径孔28と、スポーク部８，８Ａの一端12が有する胴部14が通る大きさの径で形成される小径孔29とが連結されて成るものである。また、リム部７には、スポーク部８，８Ａの一端12が挿通される挿通孔22のほかに、引張部材23が挿通される挿通孔24が形成されている。これは、引張部材23の胴部25が通る大きさの径で形成されているものとする。また、リム部７は、回転軸４の軸方向Ｘに前後して前側リム部７と後側リム部７Ａの前後一対で設けられると共に、この前後一対で設けられたリム部７，７Ａ間の前後幅Ｈ１が、ハブ部６の前側端部19から後側端部20の前後幅Ｈ２よりも広く設けられるものとする。こうした、リム部７，７Ａ間の前後幅Ｈ１により、スポーク部８，８Ａ間に張設される受風部９の受風面積が変化するものとなる（Ｈ１＞Ｈ２）。すなわち、一対のリム部７，７Ａによる前後幅Ｈ１が広がれば、リム部７，７Ａと連結されるスポーク部８，８Ａの一端12側も広がるので、これに伴い、スポーク部８，８Ａ間に張設される受風部９は上方側にいくに従い受風面積が広がっていくものとなる。 The rim portion 7 has a thin plate-like rib portion 21 formed on the outer periphery, and the rib portion 21 has an insertion hole 22 through which one end 12 of the spoke portions 8 and 8A is inserted. In the present embodiment, the insertion hole 22 of the rim portion 7 has a large-diameter hole 28 formed with a diameter large enough to pass the head portion 17 formed at one end 12 of the spoke portions 8 and 8A, and the spoke portions 8 and 8A. The one end 12 is connected to a small-diameter hole 29 formed with a diameter large enough to pass through the body 14. In addition to the insertion hole 22 through which the one end 12 of the spokes 8 and 8A is inserted, the rim part 7 is formed with an insertion hole 24 through which the tension member 23 is inserted. This is assumed to be formed with a diameter of a size through which the body 25 of the tension member 23 passes. In addition, the rim portion 7 is provided in front and rear pairs of the front rim portion 7 and the rear rim portion 7A back and forth in the axial direction X of the rotating shaft 4, and between the rim portions 7 and 7A provided in the front and rear pair. It is assumed that the front-rear width H1 is wider than the front-rear width H2 of the rear end 20 from the front end 19 of the hub 6. The wind receiving area of the wind receiving portion 9 stretched between the spoke portions 8 and 8A is changed by the front-rear width H1 between the rim portions 7 and 7A (H1> H2). That is, if the front-rear width H1 by the pair of rim portions 7 and 7A is widened, the one end 12 side of the spoke portions 8 and 8A connected to the rim portions 7 and 7A is also widened. The wind receiving portion 9 is stretched so that the wind receiving area increases as it goes upward.

そして、前述した一対のリム部７，７Ａ間には、前後幅Ｈ１を規制するための引張部材23が設けられる。この引張部材23は、スポーク部８，８Ａ間に張設された受風部９が風Ｆを受けたことにより発生する抗力に対抗するために設けられるもので、各スポーク部８，８Ａに働くモーメントを分散させて低減することができるので、細いスポーク部８，８Ａでハブ部６とリム部７，７Ａを連結した場合であっても、モーメントによる変形等が起こり難くなり、風車構造としての強度を高めている。また、本実施例では、この引張部材23に、ハブ部６とリム部７，７Ａを連結するスポーク部８，８Ａと同様のスポークを用いているが、これに限らず引張りに強い部材であればよい。 And between the pair of rim portions 7 and 7A described above, a tension member 23 for regulating the front-rear width H1 is provided. The tension member 23 is provided to counter the drag generated when the wind receiving portion 9 stretched between the spoke portions 8 and 8A receives the wind F, and acts on each of the spoke portions 8 and 8A. Since the moment can be dispersed and reduced, even when the hub portion 6 and the rim portions 7 and 7A are connected by the thin spoke portions 8 and 8A, deformation due to the moment is difficult to occur, and the wind turbine structure Strength is increased. Further, in this embodiment, the tension member 23 uses the same spokes as the spoke portions 8 and 8A for connecting the hub portion 6 and the rim portions 7 and 7A. That's fine.

ここで、上記構成部材の連結構造について説明する。 Here, the connection structure of the above-described constituent members will be described.

まず、一対のリム部７，７Ａ間を略水平となるように引張部材23により連結する。この時、引張部材23は、端部26をリブ部21の挿通孔22に挿入して、ナット27，27でリブ部21の両側面を挟みつけるように締めることで連結固定される。 First, the tension member 23 connects the pair of rim portions 7 and 7A so as to be substantially horizontal. At this time, the tension member 23 is connected and fixed by inserting the end portion 26 into the insertion hole 22 of the rib portion 21 and tightening the nuts 27 and 27 so as to sandwich both side surfaces of the rib portion 21.

次に、スポーク部８，８Ａをハブ部６からリム部７にかけて連結する。ハブ部６の前側端部19付近に配置されるスポーク部８は、一対のリム部７，７Ａのうち前側のリム部７に連結され、ハブ部６の後側端部20に配置されるスポーク部８Ａは、一対のリム部７，７Ａのうち後側のリム部７Ａに連結されるものである。こうした各スポーク部８，８Ａは、一端12側のヘッド部17をリム部７の挿通孔22が有する大径孔28に挿入し、このヘッド部17を小径孔29側へと移動させることで嵌合し、リム部７と連結される。 Next, the spoke portions 8, 8 A are connected from the hub portion 6 to the rim portion 7. The spoke portion 8 disposed in the vicinity of the front end portion 19 of the hub portion 6 is connected to the front rim portion 7 of the pair of rim portions 7 and 7A and is disposed at the rear end portion 20 of the hub portion 6. The portion 8A is connected to the rear rim portion 7A of the pair of rim portions 7 and 7A. Each of the spoke portions 8 and 8A is fitted by inserting the head portion 17 on one end 12 side into the large diameter hole 28 of the insertion hole 22 of the rim portion 7 and moving the head portion 17 to the small diameter hole 29 side. And connected to the rim portion 7.

また、各スポーク部８，８Ａは、他端13側のヘッド部18をハブ部６の挿通孔11に挿入し、これを内螺子が切られたニップル30で締めることでハブ部６と連結される。この時、スポーク部８，８Ａに初期張力を与えるために、ニップル30によりスポーク部８，８Ａの張りを調節するものとする。 Further, each of the spoke portions 8 and 8A is connected to the hub portion 6 by inserting the head portion 18 on the other end 13 side into the insertion hole 11 of the hub portion 6 and tightening it with the nipple 30 with the inner screw cut. The At this time, in order to apply initial tension to the spoke portions 8 and 8A, the tension of the spoke portions 8 and 8A is adjusted by the nipple 30.

また、図６の平面図に示すように、軸方向に隣合う各スポーク部８，８Ａは回転軸の軸方向Ｘと直交する水平方向Ｙに対して所定角度α１をなすようにハブ部６とリム部７との間で連結される。詳しくは、前側のスポーク部８がリム部７の周方向左側に略４０度〜略５０度に傾くように連結され、後側のスポーク部８Ａがリム部７Ａの周方向右側に略４０度〜略５０度に傾くように連結されるものとし、好ましくは前側のスポーク部８と後側のスポーク部８Ａが共に略４５度に傾くように連結されるものとして、風向きが変わった場合にあっても発電効率を落とすことのないよう設けられるものとする。 Further, as shown in the plan view of FIG. 6, the spoke portions 8, 8A adjacent to each other in the axial direction are connected to the hub portion 6 so as to form a predetermined angle α1 with respect to the horizontal direction Y orthogonal to the axial direction X of the rotating shaft. It is connected with the rim part 7. Specifically, the front spoke portion 8 is connected to the left side in the circumferential direction of the rim portion 7 so as to be inclined at about 40 degrees to about 50 degrees, and the rear spoke portion 8A is about 40 degrees on the right side in the circumferential direction of the rim portion 7A. In the case where the wind direction is changed, it is assumed that the front spoke portion 8 and the rear spoke portion 8A are both inclined so as to be inclined at approximately 45 degrees. The power generation efficiency shall not be reduced.

さらに、図７に示すように、本実施例では、受風部９が張設された前後一対のスポーク部８，８Ａと隣合う前後一対のスポーク部８，８Ａとの間隔が、回転軸４の軸芯４Ａとスポーク８，８Ａ間に張設された受風部９の中心線Ｔを結んだ角度α２を基準にしており、例えば、受風部を九枚設けた構成では、この間隔が略４０度となるように配置するものとする。尚、本実施例で示すように、受風部９は複数枚でなるものとし、その枚数は限定されないものであるが、受風部９は八枚以上が好ましく、更には偶数枚でなるものとするのがより好ましい。 Further, as shown in FIG. 7, in this embodiment, the distance between the pair of front and rear spoke parts 8 and 8 A on which the wind receiving part 9 is stretched and the pair of front and rear spoke parts 8 and 8 A adjacent to each other is set as the rotation axis 4. The angle α2 connecting the center line T of the wind receiving portion 9 stretched between the shaft core 4A and the spokes 8 and 8A is used as a reference. For example, in a configuration in which nine wind receiving portions are provided, this interval is It shall arrange | position so that it may become about 40 degree | times. As shown in this embodiment, the wind receiving portion 9 is composed of a plurality of sheets, and the number of the wind receiving portions 9 is not limited. However, the number of the wind receiving portions 9 is preferably eight or more, and more preferably an even number. Is more preferable.

このようにすることで、本実施例の風車１は、ハブ部６からリム部７にかけて受風部９で風Ｆを受ける受風面積が大きくなるので効率よく抗力を利用することができると共に、抗力の伝達が円滑となる。 By doing in this way, while the windmill 1 of a present Example can receive the wind F in the wind receiving part 9 from the hub part 6 to the rim | limb part 7, and can use a drag efficiently, Drag transmission is smooth.

そして、ハブ部６からリム部７，７Ａにかけてスポーク部８，８Ａを連結した後、前後一対のスポーク部８，８Ａ間に受風部９を張設する。この受風部９は、キャンバス等の柔軟性のある布製部材等からなるシート部材を用いるものとし、シート部材とすることで金属板で形成される受風部よりも軽量化することができる。尚、このシート部材は、風車１が設置される場所に応じて耐候性、耐久性を高めるためにコーティング剤を塗布したものを用いることが好ましい。 And after connecting the spoke parts 8 and 8A from the hub part 6 to the rim parts 7 and 7A, the wind receiving part 9 is stretched between the pair of front and rear spoke parts 8 and 8A. The wind receiving portion 9 uses a sheet member made of a flexible cloth member such as a canvas, and can be made lighter than the wind receiving portion formed of a metal plate. In addition, as for this sheet | seat member, it is preferable to use what applied the coating agent in order to improve a weather resistance and durability according to the place where the windmill 1 is installed.

こうしたことで本実施例では、構成部材の荷重や、風Ｆを受けることにより発生する抗力に対抗して、放射状に配置されたスポーク部８，８Ａの引張りが作用し、これらを分散させることができるので、軽量化の図られた細い線材により構成されてあっても、強度面に何ら問題もなく大型化することができる。 In this way, in this embodiment, the tensile force of the spoke portions 8 and 8A arranged radially acts against the load generated by receiving the load of the component members and the wind F, and these can be dispersed. Therefore, even if it is made of a thin wire material that is reduced in weight, the size can be increased without any problem in terms of strength.

このように本実施例では、請求項１に対応して、発電機を有する発電機ユニット10と連結される回転軸４と、この回転軸４の軸周りに取付けられるハブ部６と、ハブ部６と連結部材により連結され回転軸４の軸方向Ｘに一対で設けたリム部７と、回転軸４の軸方向Ｘに隣合う連結部材間に張設される受風部９とを備える風車１において、連結部材が、ハブ部６からリム部７にかけて放射状に配置されるスポーク部８，８Ａにより形成されるから、構成部材の荷重や、風Ｆを受けることにより発生する抗力に対抗して、放射状に配置されたスポーク部８，８Ａの引張りが作用し、これを分散させることができるので、軽量化の図られた細い線材により構成されてあっても、強度面に何ら問題もなく大型化することができる。 Thus, in this embodiment, corresponding to claim 1, the rotating shaft 4 connected to the generator unit 10 having the generator, the hub portion 6 attached around the axis of the rotating shaft 4, and the hub portion. 6 and a wind turbine including a rim portion 7 connected in a pair in the axial direction X of the rotating shaft 4 and a wind receiving portion 9 stretched between connecting members adjacent to each other in the axial direction X of the rotating shaft 4. 1, the connecting member is formed by the spoke portions 8 and 8 A arranged radially from the hub portion 6 to the rim portion 7, so that it resists the load generated by the component members and the drag generated by receiving the wind F. Since the spokes 8 and 8A arranged in a radial manner act and can be dispersed, even if the spoke portions 8 and 8A are composed of thin wire rods that are reduced in weight, there is no problem in strength. Can be

このように本実施例では、請求項２に対応して、スポーク部８，８Ａが、回転軸４の軸方向Ｘと直交する水平軸Ｙに対して所定角度に傾いて設けられるから、受風部９が効率よく風を受けることができ、風向きが変わった場合であっても安定して対応できるので、発電効率の向上を図ることができる。 As described above, in this embodiment, the spoke portions 8 and 8A are provided so as to be inclined at a predetermined angle with respect to the horizontal axis Y orthogonal to the axial direction X of the rotating shaft 4, corresponding to claim 2. Since the part 9 can receive wind efficiently and can respond stably even when the wind direction changes, the power generation efficiency can be improved.

このように本実施例では、請求項３に対応して、受風部９が、柔軟性を有するシート部材からなるから、従来の風車翼と比べて簡素な構成となるためコスト削減を図ることができると共に、金属板で形成される受風部９よりも軽量化され、更には受風部９の破損等による部品交換を現場にて簡便に行うことができる。 Thus, in the present embodiment, corresponding to claim 3, since the wind receiving portion 9 is made of a flexible sheet member, the structure is simpler than that of a conventional wind turbine blade, so that the cost can be reduced. In addition, it is lighter than the wind receiving portion 9 formed of a metal plate, and further, parts replacement due to breakage of the wind receiving portion 9 or the like can be easily performed on site.

尚、本発明は、本実施例に限定されるものではなく、本発明の要旨の範囲内で種々の変形実施が可能である。例えば、上記実施例におけるスポーク部８，８Ａは、風車１全体が同一方向から抗力を受けるものとした観点から点対称としているが、これに限らず、他方向からの抗力に対抗できるように非対称であってもよい。 The present invention is not limited to this embodiment, and various modifications can be made within the scope of the gist of the present invention. For example, the spoke portions 8 and 8A in the above embodiment are point-symmetric from the viewpoint that the wind turbine 1 as a whole receives a drag force from the same direction. However, the present invention is not limited to this and is asymmetrical so as to resist a drag force from another direction. It may be.

１風車
４回転軸
６ハブ部
７リム部
８スポーク部
９受風部
10 発電機ユニット
21 リブ部
23 引張部材
Ｘ回転軸の軸方向
Ｙ水平方向 DESCRIPTION OF SYMBOLS 1 Windmill 4 Rotating shaft 6 Hub part 7 Rim part 8 Spoke part 9 Wind receiving part
10 Generator unit
21 Ribs
23 Tensile member X Rotating shaft axial direction Y Horizontal direction

Claims

A rotating shaft connected to the generator; a hub portion attached around the axis of the rotating shaft; a rim portion connected by a connecting member to the hub portion in the axial direction of the rotating shaft; and the rotating shaft A wind turbine provided between the connecting members adjacent to each other in the axial direction of the wind turbine, wherein the connecting members are formed by spoke portions that are radially arranged from the hub portion to the rim portion. A characteristic windmill.

The wind turbine according to claim 1, wherein the spoke portion is provided to be inclined at a predetermined angle with respect to a horizontal axis orthogonal to the axial direction of the rotating shaft.

The wind turbine according to claim 1, wherein the wind receiving portion is made of a flexible sheet member.