JP5167036B2 - Windmill blade - Google Patents

Windmill blade Download PDF

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JP5167036B2
JP5167036B2 JP2008224626A JP2008224626A JP5167036B2 JP 5167036 B2 JP5167036 B2 JP 5167036B2 JP 2008224626 A JP2008224626 A JP 2008224626A JP 2008224626 A JP2008224626 A JP 2008224626A JP 5167036 B2 JP5167036 B2 JP 5167036B2
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main body
wind turbine
derivative
blade
turbine blade
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JP2010059813A (en
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昌幸 箕輪
憲爾 堀井
紳一 角
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Toenec Corp
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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

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Description

本発明は、風車ブレードに関し、詳しくは、中空部を有する略筒状に形成された本体にレセプタを備えた風車ブレードに関する。 The present invention relates to a wind turbine blade , and more particularly to a wind turbine blade including a receptor in a main body formed in a substantially cylindrical shape having a hollow portion.

この種の被落雷物として、例えば、導線を介して大地へ接続されている（所謂、接地されている）レセプタを備えた風車ブレードが知られている。この風車ブレードの本体の外面には、導電性を有する薄い金属箔がレセプタに接続された状態で貼り付けられている。これにより、例えば、風車ブレードに雷撃が生じた場合でも、金属箔からレセプタおよび導線を介して雷撃電流を大地へと導くことができる。   As this type of lightning strike, for example, a windmill blade including a receptor (so-called grounded) connected to the ground via a conductor is known. A thin metal foil having conductivity is attached to the outer surface of the main body of the wind turbine blade while being connected to the receptor. Thereby, for example, even when a lightning strike occurs on the windmill blade, the lightning strike current can be guided from the metal foil to the ground via the receptor and the conductor.

なお、この出願の発明に関連する先行技術文献情報としては、例えば、特許文献１が知られている。
特開２００６−７０８７９号公報 As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
JP 2006-70879 A

しかしながら、上述した風車ブレードでは、エネルギーの大きな雷撃が風車ブレードに生じると、金属箔が焼損してしまう事態が発生していた。このような事態が発生すると、風車ブレードの本体の破損にも繋がるため、結果として、風力発電設備を長期に亘って停止させなければいけなかった。   However, in the windmill blade described above, when a lightning strike with a large energy occurs in the windmill blade, a situation occurs in which the metal foil is burned out. When such a situation occurs, it also leads to damage to the main body of the windmill blade. As a result, the wind power generation facility has to be stopped for a long period of time.

本発明は、このような課題を解決しようとするもので、その目的は、耐雷性能を向上させた風車ブレードを提供することである。 The present invention is intended to solve such problems, and an object thereof is to provide a wind turbine blade with improved lightning resistance.

本発明は、上記の目的を達成するためのものであって、以下のように構成されている。請求項１に記載の発明は、中空部を有する略筒状に形成された本体にレセプタを備えた風車ブレードであって、本体の外面または内面には、レセプタと電気的に接続された導電性部材と、その導電性部材の表面を被覆した絶縁部材とから構成される誘導体が配設されていることを特徴とする。
この構成によれば、風車ブレードに雷撃が生じると、その雷撃電流は背後電極によって電界が集中するため、その放電路が背後電極に沿って絶縁部材の表面を最寄のレセプタへと流れていく。この時、導電性部材に流れる電流は、絶縁物を介した誘導電流が流れるのみであり、雷撃の主電流が流れることはない。そのため、エネルギーの大きな雷撃が風車ブレードに生じた場合でも、導電性部材が焼損することはない。したがって、風車ブレードの耐雷性能を向上させることができる。 The present invention is for achieving the above object, and is configured as follows. The invention according to claim 1 is a wind turbine blade including a receptor on a main body formed in a substantially cylindrical shape having a hollow portion, and the outer surface or the inner surface of the main body is electrically connected to the receptor. A derivative comprising a member and an insulating member covering the surface of the conductive member is provided.
According to this configuration, when a lightning strike occurs on the windmill blade , the electric field is concentrated on the lightning current by the back electrode, so that the discharge path flows on the surface of the insulating member along the back electrode to the nearest receptor. . At this time, the current that flows through the conductive member is only the induced current through the insulator, and the main current of the lightning strike does not flow. Therefore, even when a lightning strike with high energy occurs in the windmill blade , the conductive member does not burn out. Therefore, the lightning resistance performance of the windmill blade can be improved.

また、請求項２に記載の発明は、請求項１に記載の風車ブレードであって、本体は、略筒状の長手方向に沿って半割構造となっており、導電性部材は、その半割の境を覆う格好となるように板状に形成されていることを特徴とする。
この構成によれば、半割構造の境の電気的強度が不足している場合であっても、その境を導電性部材で覆っているため、その強度不足を補うことができる。 The invention according to claim 2 is the wind turbine blade according to claim 1, wherein the main body has a half structure along the substantially cylindrical longitudinal direction, and the conductive member It is characterized by being formed in a plate shape so as to cover the split boundary.
According to this configuration, even when the electrical strength at the boundary of the halved structure is insufficient, the boundary is covered with the conductive member, so that the insufficient strength can be compensated.

また、請求項３に記載の発明は、請求項２に記載の風車ブレードであって、本体の外面のうち誘導体の配設部位には凹溝が形成されており、誘導体は、その凹溝の内部に配設されていることを特徴とする。
この構成によれば、本体の内面に誘導体が配設されているため、例えば、被落雷物を回転させたときの空気抵抗を減らすことができる。 Further, the invention according to claim 3 is the windmill blade according to claim 2, wherein a groove is formed in a portion where the derivative is disposed on the outer surface of the main body, and the derivative is formed in the groove. It is arranged inside.
According to this configuration, since the derivative is disposed on the inner surface of the main body, for example, it is possible to reduce air resistance when the lightning strike is rotated.

以下、本発明を実施するための最良の形態を、図面を用いて説明する。

The best mode for carrying out the present invention will be described below with reference to the drawings .

（実施例１）
まず、図１〜２を参照して、本発明の実施例１を説明する。図１は、本発明の実施例１に係る風車ブレードの全体斜視図である。図２は、図１のＡ−Ａ線断面図である。 Example 1
First, Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 1 is an overall perspective view of a wind turbine blade according to a first embodiment of the present invention. 2 is a cross-sectional view taken along line AA in FIG.

図１、２に示すように、風車ブレード１は、その本体１０が中空部を有する略筒状に形成された翼部材である。この本体１０には、その中空部を補強する補強部材１２が適宜の箇所（例えば、本体１０の長手方向に５箇所）に設けられている。この補強部材１２には、本体１０の両外面からそれぞれ突出するように、例えば、５個ずつ計１０個のレセプタ１４がそれぞれ組み付けられている。これら各レセプタ１４は、導線１６を介して電気的にそれぞれ接続されている。そして、この導線１６は、ナセルおよびタワー（いずれも図示しない）を介して大地へと接続されている。   As shown in FIGS. 1 and 2, the windmill blade 1 is a wing member formed in a substantially cylindrical shape with a main body 10 having a hollow portion. The main body 10 is provided with reinforcing members 12 that reinforce the hollow portion at appropriate positions (for example, five positions in the longitudinal direction of the main body 10). A total of ten receptors 14, for example, five each are assembled to the reinforcing member 12 so as to protrude from both outer surfaces of the main body 10. Each of these receptors 14 is electrically connected via a conducting wire 16. And this conducting wire 16 is connected to the earth through a nacelle and a tower (both not shown).

この本体１０は、その縁（翼の厚みが薄い部位）に沿って半割構造となっている。そして、この本体１０の外面には、その半割の境を覆う格好となるように、第１の誘導体４０が配設されている。この第１の誘導体４０とは、板状に形成されている第１の導電性部材（例えば、導電性を有する薄い金属箔）４２と、この第１の導電性部材４２の表面を空気層を有することなく完全に被覆した（例えば、絶縁テープ等で導電性部材４２の表面を完全に被覆した）第１の絶縁部材４４とから構成されるものである。このようにして、第１の導電性部材４２によって本体１０の半割の境を覆うことができる。   The main body 10 has a halved structure along the edge (the portion where the blade thickness is thin). And the 1st derivative | guide_body 40 is arrange | positioned on the outer surface of this main body 10 so that it may become the appearance which covers the boundary of the half. The first derivative 40 includes a first conductive member (for example, a thin metal foil having conductivity) 42 formed in a plate shape, and an air layer on the surface of the first conductive member 42. And a first insulating member 44 that is completely covered (for example, the surface of the conductive member 42 is completely covered with an insulating tape or the like). In this way, the half boundary of the main body 10 can be covered by the first conductive member 42.

また、この本体１０の外面には、第１の導電性部材４２を各レセプタ１４に対して電気的に接続させる第２の誘導体５０が配設されている。この第２の誘導体５０も、既に説明した第１の誘導体４０と同様に、第２の導電性部材５２と第２の絶縁部材５４とから構成されている。この第２の導電性部材５２は、第１の導電性部材４２からレセプタ１４に向けて枝分かれする格好で配設されている。そして、この第２の導電性部材５２も、既に説明した第１の絶縁部材４４と同様の第２の絶縁部材５４によって完全に被覆されている。このように構成された風車ブレード１は、ナセルに対して放射状に複数本（例えば、３本）組み付けられる格好で使用されている。   A second derivative 50 that electrically connects the first conductive member 42 to each receptor 14 is disposed on the outer surface of the main body 10. The second derivative 50 is also composed of a second conductive member 52 and a second insulating member 54, similarly to the first derivative 40 already described. The second conductive member 52 is arranged so as to branch from the first conductive member 42 toward the receptor 14. The second conductive member 52 is also completely covered with the second insulating member 54 similar to the first insulating member 44 already described. The wind turbine blade 1 configured as described above is used in such a manner that a plurality (for example, three) of the wind turbine blades 1 are assembled radially with respect to the nacelle.

本発明の実施例１に係る風車ブレード１は、上述したように構成されている。この構成によれば、例えば、風車ブレード１に雷撃が生じると、その雷撃電流は背後電極によって電界が集中するため、その放電路が背後電極に沿って両絶縁部材４４、５４の表面を最寄のレセプタ１４へと流れていく。この時、両導電性部材４２、５２に流れる電流は、絶縁物を介した誘導電流が流れるのみであり、雷撃の主電流が流れることはない。これらのことを、以下において、背後電極効果と記す。   The wind turbine blade 1 according to the first embodiment of the present invention is configured as described above. According to this configuration, for example, when a lightning strike occurs on the wind turbine blade 1, the electric field is concentrated on the lightning strike current by the back electrode, so that the discharge path is closest to the surfaces of both insulating members 44 and 54 along the back electrode. It flows to the receptor 14. At this time, the current that flows through both the conductive members 42 and 52 is only the induced current through the insulator, and the main current of lightning strike does not flow. These are hereinafter referred to as a back electrode effect.

そのため、エネルギーの大きな雷撃が風車ブレード１に生じた場合でも、両導電性部材４２、５２が焼損することはない。したがって、風車ブレード１の耐雷性能を向上させることができる。また、この時、両導電性部材４２、５２には雷撃の主電流が流れることがないため、両導電性部材４２、５２の断面積は小さくても良い。そして、レセプタ１４へと流れた雷撃電流は、導線１６を介して大地へと導かれていく。このようにして、従来技術と同様に、雷撃電流を大地へと導くことができる。なお、両誘導体４０、５０は本体１０の外面に配設すればよいため、新規の風車ブレードにおける本体の外面だけでなく、既存の風車ブレードにおける本体の外面にも両誘導体４０、５０を後付けで配設することができる。   Therefore, even when a lightning strike with a large energy occurs in the windmill blade 1, both the conductive members 42 and 52 are not burned out. Therefore, the lightning resistance performance of the windmill blade 1 can be improved. At this time, since the main current of lightning strike does not flow through both the conductive members 42 and 52, the cross-sectional areas of both the conductive members 42 and 52 may be small. Then, the lightning current that has flowed to the receptor 14 is guided to the ground via the conductor 16. In this way, the lightning strike current can be guided to the ground as in the prior art. In addition, since both the derivatives 40 and 50 should just be arrange | positioned on the outer surface of the main body 10, not only the outer surface of the main body in a new windmill blade but both derivatives 40 and 50 are retrofitted on the outer surface of the main body in the existing windmill blade. It can be arranged.

また、この構成によれば、半割構造の境の電気的強度が不足している場合であっても、その境を第１の導電性部材４２で覆っているため、その強度不足を補うことができる。また、この構成によれば、両導電性部材４２、５２は板状に形成されているため、その表面積を大きく確保することができる。そのため、風車ブレード１の本体１０の表面を広く雷撃からカバーできる。   Further, according to this configuration, even when the electrical strength at the boundary of the half structure is insufficient, the boundary is covered with the first conductive member 42, so that the insufficient strength is compensated. Can do. Moreover, according to this structure, since both the electroconductive members 42 and 52 are formed in plate shape, the surface area can be ensured large. Therefore, the surface of the main body 10 of the windmill blade 1 can be widely covered from lightning strikes.

（実施例２）
次に、図３〜４を参照して、本発明の実施例２を説明する。図３は、本発明の実施例２に係る風車ブレードの全体斜視図である。図４は、図３のＢ−Ｂ線断面図である。 (Example 2)
Next, Embodiment 2 of the present invention will be described with reference to FIGS. FIG. 3 is an overall perspective view of the wind turbine blade according to the second embodiment of the present invention. 4 is a cross-sectional view taken along line BB in FIG.

これら図３、４からも明らかなように、この実施例２は、既に説明した実施例１と比較すると、両誘導体４０、５０を本体１０の内面に配設した実施例である。そのため、以下の説明にあたって、同一もしくは均等な構成の部材には、図面において同一符号を付すことで、重複する説明は省略することとする。このことは、後述する実施例３においても同様である。   As is clear from FIGS. 3 and 4, the second embodiment is an embodiment in which both derivatives 40 and 50 are disposed on the inner surface of the main body 10 as compared with the first embodiment already described. Therefore, in the following description, members having the same or equivalent configuration are denoted by the same reference numerals in the drawings, and redundant description is omitted. The same applies to Example 3 described later.

図３、４に示すように、実施例２における風車ブレード２も、その本体１０が中空部を有する略筒状に形成された翼部材である。この本体１０の内面のうち、実施例１における風車ブレード１の両誘導体４０、誘導体５０の配設位置と向かい合う位置には、両誘導体４０、誘導体５０がそれぞれ配設されている。   As shown in FIGS. 3 and 4, the wind turbine blade 2 in the second embodiment is also a wing member that is formed in a substantially cylindrical shape with a main body 10 having a hollow portion. In the inner surface of the main body 10, the two derivatives 40 and the derivative 50 are respectively disposed at positions facing the positions where the both derivatives 40 and the derivatives 50 of the wind turbine blade 1 according to the first embodiment are disposed.

本発明の実施例２に係る風車ブレード２は、上述したように構成されている。この構成によれば、例えば、風車ブレード２に雷撃が生じると、その雷撃電流は背後電極によって電界が集中するため、その放電路が背後電極に沿って本体１０の表面を最寄のレセプタ１４へと流れていく。そのため、この風車ブレード２も、実施例１で説明した風車ブレード１と同様の作用効果（背後電極効果）を得ることができる。また、この構成によれば、本体１０の内面に両誘導体４０、５０が配設されているため、風車ブレード２を回転させたときの空気抵抗を減らすことができる。   The wind turbine blade 2 according to the second embodiment of the present invention is configured as described above. According to this configuration, for example, when a lightning strike occurs on the windmill blade 2, the electric field is concentrated on the lightning strike current by the back electrode. And flow. Therefore, this windmill blade 2 can also obtain the same operation effect (back electrode effect) as the windmill blade 1 described in the first embodiment. Moreover, according to this structure, since both the derivatives 40 and 50 are arrange | positioned by the inner surface of the main body 10, the air resistance at the time of rotating the windmill blade 2 can be reduced.

（実施例３）
続いて、図５〜６を参照して、本発明の実施例３を説明する。図５は、本発明の実施例３に係る風車ブレードの全体斜視図である。図６は、図５のＣ−Ｃ線断面図である。 (Example 3)
Subsequently, Embodiment 3 of the present invention will be described with reference to FIGS. FIG. 5 is an overall perspective view of a wind turbine blade according to a third embodiment of the present invention. 6 is a cross-sectional view taken along the line CC of FIG.

これら図５、６からも明らかなように、この実施例３は、既に説明した実施例１と比較すると、両誘導体４０、５０を本体１０の外面に埋め込む格好となるように配設した実施例である。   As is apparent from FIGS. 5 and 6, the third embodiment is an embodiment in which both derivatives 40 and 50 are arranged so as to be embedded in the outer surface of the main body 10 as compared with the first embodiment already described. It is.

図５、６に示すように、実施例３における風車ブレード３も、その本体１０が中空部を有する略筒状に形成された翼部材である。この本体１０の外面のうち、実施例１の風車ブレード１において、両誘導体４０、５０が配設されている部位には凹溝１８が形成されている。そして、この凹溝１８の内部には、両誘導体４０、５０が配設されている。   As shown in FIGS. 5 and 6, the wind turbine blade 3 in the third embodiment is also a wing member formed in a substantially cylindrical shape with the main body 10 having a hollow portion. Of the outer surface of the main body 10, in the wind turbine blade 1 of the first embodiment, a groove 18 is formed in a portion where both the derivatives 40 and 50 are disposed. And both the derivatives 40 and 50 are arrange | positioned inside this ditch | groove 18. As shown in FIG.

本発明の実施例３に係る風車ブレード３は、上述したように構成されている。この構成によれば、この風車ブレード３も、実施例１で説明した風車ブレード１と同様の作用効果（背後電極効果）を得ることができる。また、この構成によれば、本体１０の外面に形成された凹溝１８に両誘導体４０、５０が配設されているため、実施例２で説明した風車ブレード２と同様に、風車ブレード３を回転させたときの空気抵抗を減らすことができる。   The wind turbine blade 3 according to the third embodiment of the present invention is configured as described above. According to this configuration, the wind turbine blade 3 can also obtain the same operational effects (back electrode effect) as the wind turbine blade 1 described in the first embodiment. Further, according to this configuration, since both the derivatives 40 and 50 are disposed in the concave groove 18 formed on the outer surface of the main body 10, the wind turbine blade 3 is mounted in the same manner as the wind turbine blade 2 described in the second embodiment. Air resistance when rotated can be reduced.

上述した内容は、あくまでも本発明の一実施の形態に関するものであって、本発明が上記内容に限定されることを意味するものではない。
実施例１〜３では、被落雷物の例として、風車ブレード１、２、３を例に説明した。しかし、これに限定されるものでなく、例えば、航空機等であっても構わない。 The contents described above are only related to one embodiment of the present invention, and do not mean that the present invention is limited to the above contents.
In Examples 1 to 3, windmill blades 1, 2, and 3 have been described as examples of lightning strikes. However, the present invention is not limited to this. For example, an aircraft or the like may be used.

また、実施例１〜３では、第２の誘導体５０は、レセプタ１４から第１の誘導体４０に向けて直交するように配置される場合を説明した。しかし、これに限定されるものでなく、例えば、第２の誘導体５０は、レセプタ１４から第１の誘導体４０に向けて放射状に配置されても構わない。また、第２の誘導体５０は、レセプタ１４から第１の誘導体４０に向けて本体１０の表面の全てに配置されても構わない。   In the first to third embodiments, the case where the second derivative 50 is disposed so as to be orthogonal to the first derivative 40 from the receptor 14 has been described. However, the present invention is not limited to this. For example, the second derivative 50 may be arranged radially from the receptor 14 toward the first derivative 40. Further, the second derivative 50 may be disposed on the entire surface of the main body 10 from the receptor 14 toward the first derivative 40.

図１は、本発明の実施例１に係る風車ブレードの全体斜視図である。FIG. 1 is an overall perspective view of a wind turbine blade according to a first embodiment of the present invention. 図２は、図１のＡ−Ａ線断面図である。2 is a cross-sectional view taken along line AA in FIG. 図３は、本発明の実施例２に係る風車ブレードの全体斜視図である。FIG. 3 is an overall perspective view of the wind turbine blade according to the second embodiment of the present invention. 図４は、図３のＢ−Ｂ線断面図である。4 is a cross-sectional view taken along line BB in FIG. 図５は、本発明の実施例３に係る風車ブレードの全体斜視図である。FIG. 5 is an overall perspective view of a wind turbine blade according to a third embodiment of the present invention. 図６は、図５のＣ−Ｃ線断面図である。6 is a cross-sectional view taken along the line CC of FIG.

符号の説明Explanation of symbols

１ 風車ブレード（実施例１）
２ 風車ブレード（実施例２）
３ 風車ブレード（実施例３）
１０ 本体
１４ レセプタ
１８ 凹溝
４０ 第１の誘導体
４２ 第１の導電性部材
４４ 第１の絶縁部材
５０ 第２の誘導体
５２ 第２の導電性部材
５４ 第２の絶縁部材




1 Windmill blade (Example 1)
2 Windmill blade (Example 2)
3 Windmill blade (Example 3)
DESCRIPTION OF SYMBOLS 10 Main body 14 Receptor 18 Concave groove 40 1st derivative | guide_body 42 1st electroconductive member 44 1st insulating member 50 2nd derivative | guide_body 52 2nd electroconductive member 54 2nd insulating member




Claims (3)

中空部を有する略筒状に形成された本体にレセプタを備えた風車ブレードであって、
本体の外面または内面には、レセプタと電気的に接続された導電性部材と、その導電性部材の表面を被覆した絶縁部材とから構成される誘導体が配設されていることを特徴とする風車ブレード。 A windmill blade provided with a receptor in a main body formed in a substantially cylindrical shape having a hollow part,
A wind turbine characterized in that a derivative composed of a conductive member electrically connected to a receptor and an insulating member covering the surface of the conductive member is disposed on an outer surface or an inner surface of the main body. Blade . 請求項１に記載の風車ブレードであって、
本体は、略筒状の長手方向に沿って半割構造となっており、
導電性部材は、その半割の境を覆う格好となるように板状に形成されていることを特徴とする風車ブレード。 The windmill blade according to claim 1,
The main body has a halved structure along the substantially cylindrical longitudinal direction,
The wind turbine blade , wherein the conductive member is formed in a plate shape so as to cover the half of the boundary. 請求項２に記載の風車ブレードであって、
本体の外面のうち誘導体の配設部位には凹溝が形成されており、
誘導体は、その凹溝の内部に配設されていることを特徴とする風車ブレード。 The windmill blade according to claim 2,
On the outer surface of the main body, a groove is formed in the arrangement site of the derivative,
A wind turbine blade characterized in that the derivative is disposed inside the concave groove.
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ES2377669T3 (en) * 2008-07-02 2012-03-29 Siemens Aktiengesellschaft Wind turbine blade with lightning receiver and method to protect the surface of a wind turbine blade
WO2013084274A1 (en) * 2011-12-09 2013-06-13 Mitsubishi Heavy Industries, Ltd. Wind turbine blade
WO2013182447A1 (en) * 2012-06-04 2013-12-12 Lm Wp Patent Holding A/S A wind turbine blade lightning bypass system
DK2930358T3 (en) * 2014-04-10 2018-12-17 Nordex Energy Gmbh Rotor blade for a wind power plant with a potential equalizer
ES2728749T3 (en) * 2014-04-10 2019-10-28 Nordex Energy Gmbh Wind turbine rotor blade with a potential compensation arrangement
ES2646015B1 (en) * 2016-06-07 2018-09-20 Gamesa Innovation & Technology, S.L. Lightning rod system for wind turbine blades with optimized means of injecting lightning currents into the conductive components of their shells.

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