JPH0315669A - Mounting device for frp blade - Google Patents
Mounting device for frp bladeInfo
- Publication number
- JPH0315669A JPH0315669A JP1148462A JP14846289A JPH0315669A JP H0315669 A JPH0315669 A JP H0315669A JP 1148462 A JP1148462 A JP 1148462A JP 14846289 A JP14846289 A JP 14846289A JP H0315669 A JPH0315669 A JP H0315669A
- Authority
- JP
- Japan
- Prior art keywords
- blade
- frp
- embedded
- wing
- tightening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002184 metal Substances 0.000 claims abstract description 26
- 229910052751 metal Inorganic materials 0.000 claims abstract description 26
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 238000010248 power generation Methods 0.000 abstract description 2
- 150000002739 metals Chemical class 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Wind Motors (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は発電用風車に用いられるＦＲＰ翼の取付装置に
関する．
〔従来の技術〕
第３図（ｂ）は従来のＦＲＰ翼の全体形状の一例を示す
図、第４図は同じく翼根部の構造を示す縦断面図である
．これらの図に示されるように、従来はＦＲＰ翼（０１
）の基部に翼と一体のフランジ（Ｏｌａ）を形威し、翼
取付け板（０２）に直接ボル｝ （０３）とナット（０
４）で取付けていた．
〔発明が解決しようとする課題〕
ＦＲＰ翼自体の根元部にフランジを形威する従来の構造
では、フランジ径に制限がある場合、翼根元の形状が制
限され充分な強度を得ることができなかった．またＦＲ
Ｐをボルト（鉄）で締めつけるので、締めすぎるとＦＲ
Ｐ翼自体を傷つける可能性があった．そして、翼取付け
ボルトとＦＲＰ翼の強度が大幅に異なるため、長期運転
ではＦＲＰ翼のボルト接触部に亀裂が入り易かった．（
課題を解決するための手段）
本発明は、前記従来の課題を解決するために、外周に出
っ張りを有し、ＦＲＰ翼の翼根部に複数個埋め込まれた
円筒状の埋込金物と、同埋込金物の内部に装着され、基
端が上記翼根部の外に突出した締付ボルトと、同締付ボ
ルトの基端が挿入される穴を有する翼取付け板と、同翼
取付け板に上記基端を締付けるナットとを備えたことを
特徴とするＦＲＰ翼の取付装置を提案するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mounting device for FRP blades used in wind turbines for power generation. [Prior Art] Fig. 3(b) is a diagram showing an example of the overall shape of a conventional FRP blade, and Fig. 4 is a longitudinal sectional view showing the structure of the blade root. As shown in these figures, conventional FRP blades (01
) is formed with a flange (Ola) that is integrated with the wing, and a bolt (03) and nut (0
4) was installed. [Problem to be solved by the invention] In the conventional structure in which a flange is formed at the root of the FRP blade itself, if the flange diameter is limited, the shape of the blade root is restricted and sufficient strength cannot be obtained. Ta. Also FR
P is tightened with bolts (iron), so if you tighten it too much, FR will occur.
There was a possibility of damaging the P-wing itself. Additionally, because the strength of the wing attachment bolts and the FRP wing are significantly different, cracks tend to form in the bolt contact areas of the FRP wing during long-term operation. (
Means for Solving the Problems) In order to solve the above-mentioned conventional problems, the present invention provides a cylindrical embedded metal fitting having a protrusion on the outer periphery and embedded in a plurality of cylindrical embedded metal fittings in the blade root of an FRP wing; A tightening bolt that is installed inside the insert and whose base end protrudes outside the wing root, a wing mounting plate having a hole into which the base end of the tightening bolt is inserted, and the base attached to the wing mounting plate. The present invention proposes an FRP wing attachment device characterized by having a nut that tightens the end.
本発明では、ＦＲＰ翼の根元に埋込み金物を埋め込み、
その内部に切ったネジを利用してＦＲＰ翼を取り付ける
。埋込み金物形状は外周に出っ張りを設けて抜けにくい
構造としたので、ＦＲＰ翼からスッポ抜けない．取付金
具を円周方向にＦＲＰで巻くことができるため、ＦＲＰ
のフープ力およびせん断力で金物の抜けを防止できる．
ボルトには引張り力のみが作用する．Ｆ１め込み金物の
長さを充分にとれば、ＦＲＰ翼のせん断力が大きくなり
金物の抜け防止にも効果が出る．
（実施例）
第１図は本発明の一実施例を示す縦断面図、第２図は同
じく埋め込み金物の形状を示す縦断面図、第３図（ａ）
は本発明を適用したＦＲＰ翼の全体形状の一例を示す図
である．
本実施例では、頭部付近の内面にねじ（５ａ）を切った
筒状の埋込金物（５）をＦＲＰ翼（１）の翼根部に埋め
込み、その埋込金物（５）のねし（５ａ）部と翼取付板
（２）を取付ボルト（３）で締め付けることによって、
ＦＲＰ翼を取り付ける．
埋込金物（５）は、第２図に示されるとおり、ＦＲＰ翼
（１）から滑り抜けにくいように、頭部外周に出っ張＃
） （５ｂ）が設けられている．埋込金物（５）の抜け
防止には、第２図に示す金物の径ＤｏとＤｉの差を大き
くし、長さＬ１を長くとることが効果がある．これは金
物の抜けに対抗するＦＲＰＩのせん断力がＦ＝π（Ｄｏ
−Ｄｉ） ＸＬ， Ｘτで示されることから明らかであ
る．
ここでＦ：せん断力
τ： ＦＲＰの許容せん断応力
また、埋込金物（５）の長さが長い程、翼の曲り変形時
に取付ボルト（３）の曲げ応力発生を小さくできるが、
その目安として長さＬ８を取付ボルト（３）の直径の約
ｌＯ倍程度とする．
次に塊込金具（５）をＦＲＰ翼の翼根部に埋め込む工程
の一例を第５図により説明する．また第６図は、上記工
程により積層された翼根部の拡大縦断面図、第７図は第
６図の■−■矢視図、第８図は第６図の■一■横断面図
である．
この例では、埋込金物固定治具（６）を用い、実際に風
車本体に取付ける時と同様の状熊で、ＦＲＰによって埋
込金物（５）を固定していく．上記固定治具（６）は、
全体のボルトを締めつけるため、主桁全体を回転可能な
治具にしておく．
１） まず、舅根部以外の個所が図面寸法に仕上ってい
ることを確認する．（第５図（ａ））２） 次に、埋込
金物の内側部分に、ＦＲＰを周方向に連続巻きして積層
する．この場合、埋込金物の中央くびれ部（小径部）に
対応する部分は盛り上げてお＜．（第５図（ｂ）．第６
．７．８図中符号Ｂ）
３）固定用ボルト（７）を用いて、埋込金物（５）を固
定治具（６）に取付ける．その際、埋込金物とＦＲＰと
の親和性をよくする為、あらかじめ樹脂を含浸させたガ
ラスファイバーで埋込金物（５）を包んでおく．複数（
例えば２２本）の埋込金物（５）が等ピッチになってい
るかどうか、固定治具（６）と垂直であるかどうかを確
認する．（第５図（Ｃ））４）埋込金物（５）相互の間
を積層する．その際積層するマットおよびクロスの形状
をあらかじめ埋込金具（５）の間の形状に型切り裁断し
ておく・（第５図（ｄ），第６．７．８図中符号Ｄ）５
） 埋込金物のくびれ部分（小径部）に対しクロスおよ
びマットで周方向に連続巻して積層し、積層高さを一様
にする．（第５図（ｅ），第６．８図中符号Ｅ）
６） 埋込金物を埋め込むようにして、更にクロスマッ
ト，樹脂を円周方向に積層し、翼根部全体を締め付けな
がら、仕上り寸法までワインディングにより形威してゆ
く。（第５図（ｆ），第６．７８図中符号Ｆ）
７）樹脂が凝固した後、固定用ボルト（７）をゆるめて
、ＦＲＰ翼（１）を埋込金物固定治具（６）から取外す
。In the present invention, embedded hardware is embedded in the root of the FRP blade,
Attach the FRP wing using the screws cut inside. The shape of the embedded hardware has a protrusion on the outer periphery to make it difficult for it to come off, so it will not slip out from the FRP wing. Since the mounting bracket can be wrapped in FRP in the circumferential direction, FRP
The hoop force and shear force prevent hardware from falling out.
Only tensile force acts on the bolt. If the length of the F1 fittings is long enough, the shearing force of the FRP blade will increase and it will also be effective in preventing the fittings from falling out. (Example) Fig. 1 is a longitudinal sectional view showing an embodiment of the present invention, Fig. 2 is a longitudinal sectional view showing the shape of the embedded metal fitting, and Fig. 3(a)
1 is a diagram showing an example of the overall shape of an FRP blade to which the present invention is applied. In this embodiment, a cylindrical embedded metal fitting (5) with a thread (5a) cut on the inner surface near the head is embedded in the blade root of the FRP wing (1), and the screw (5) of the embedded metal fitting (5) is embedded in the blade root of the FRP wing (1). By tightening part 5a) and the wing mounting plate (2) with the mounting bolts (3),
Attach the FRP wings. As shown in Figure 2, the embedded hardware (5) has a protrusion # on the outer periphery of the head to prevent it from slipping out from the FRP wing (1).
) (5b) is provided. In order to prevent the embedded metal fitting (5) from falling out, it is effective to increase the difference between the diameters Do and Di of the metal fitting shown in FIG. 2 and to increase the length L1. This means that the shear force of the FRPI that resists the metal fittings falling out is F=π(Do
-Di) XL, Xτ. Here, F: Shear force τ: Allowable shear stress of FRP Also, the longer the length of the embedded metal fitting (5), the smaller the bending stress generated in the mounting bolt (3) during bending deformation of the wing.
As a guide, the length L8 should be approximately 10 times the diameter of the mounting bolt (3). Next, an example of the process of embedding the lump fitting (5) into the root of the FRP blade will be explained with reference to Fig. 5. In addition, Fig. 6 is an enlarged vertical cross-sectional view of the blade root layered in the above process, Fig. 7 is a view taken along the ■-■ arrow in Fig. 6, and Fig. 8 is a cross-sectional view taken in Fig. 6. be. In this example, the embedded hardware fixing jig (6) is used to fix the embedded hardware (5) using FRP in the same shape as when it is actually attached to the wind turbine body. The above fixing jig (6) is
In order to tighten all the bolts, the entire main girder is made into a rotatable jig. 1) First, confirm that the parts other than the leg root are finished to the drawing dimensions. (Fig. 5(a)) 2) Next, FRP is continuously wound and laminated in the circumferential direction on the inner side of the embedded metal object. In this case, the part corresponding to the central constriction (small diameter part) of the embedded metal piece should be raised. (Fig. 5(b). 6th
．． 7.8 (Symbol B in figure) 3) Attach the embedded metal fitting (5) to the fixing jig (6) using the fixing bolt (7). At this time, in order to improve the affinity between the embedded hardware and FRP, the embedded hardware (5) is wrapped in glass fiber impregnated with resin in advance. multiple(
For example, check whether the embedded metal fittings (5) (22 pieces) are at the same pitch and whether they are perpendicular to the fixing jig (6). (Fig. 5 (C)) 4) Embedded metal parts (5) Layer between each other. At that time, the shape of the mat and cloth to be laminated is cut in advance into the shape between the embedded fittings (5) (Fig. 5 (d), symbol D in Fig. 6.7.8) 5
) Wrap the cross and mat continuously in the circumferential direction around the narrow part (small diameter part) of the metal embedding to make the stacking height uniform. (Fig. 5 (e), symbol E in Fig. 6.8) 6) After embedding the metal fittings, layer the cross mat and resin in the circumferential direction, and while tightening the entire blade root, measure the finished dimensions. Until then, it has been shaped by winding. (Figure 5 (f), code F in Figure 6.78) 7) After the resin solidifies, loosen the fixing bolt (7) and embed the FRP wing (1) into the hardware fixing jig (6). Remove from.
上記工程によれば、埋込金物固定治具を用いるので、ボ
ルトに対する寸法合わせの必要性がなく、かつ配置精度
の高い埋込構造となる．また金物のくびれ部をマット及
び樹脂で固定し、更に締めつけ、翼根部を形威しつつ金
物を埋込むので、ＦＲＰのフープ力及びせん断力で金物
の引抜け、曲げに強い構造となる．
〔発明の効果〕
本発明においては、ＦＲＰ翼の根元部を従来のフランジ
径と同じ寸法にすることができ、また凹凸のあるフラン
ジ部を成形する必要がないから、翼根元強度を充分に保
つことができる．また、埋込金物と翼取付け板とをボル
トで締め付けるので、締め過ぎによるＦＲＰ翼の損傷が
ない。さらに、取付具がＦＲＰ中に埋め込まれ、直接外
気に接触しないので、腐食に強い．According to the above process, since an embedded hardware fixing jig is used, there is no need for dimension adjustment for bolts, and an embedded structure with high placement accuracy is achieved. In addition, the constriction of the hardware is fixed with mat and resin, which is further tightened to maintain the shape of the blade root while the hardware is embedded, resulting in a structure that is resistant to pulling out and bending the hardware due to the hoop force and shearing force of FRP. [Effects of the Invention] In the present invention, the root portion of the FRP blade can be made to have the same size as the conventional flange diameter, and there is no need to form an uneven flange portion, so the blade root strength can be maintained sufficiently. be able to. Furthermore, since the embedded hardware and the wing mounting plate are tightened with bolts, there is no damage to the FRP wing due to over-tightening. Furthermore, since the fixtures are embedded in FRP and do not come into direct contact with the outside air, they are resistant to corrosion.
第１図は本発明の一実施例を示す縦断面図、第２図は同
じく埋込金物の形状を示す縦断面図、第３図（ａ）は本
発明を適用したＦＲＰｉｌの全体形状の一例を示す図で
ある．第３図（ｂ）は従来のＦＲＰ翼の全体形状の一例
を示す図、第４図は同しく翼根部の構造を示す縦断面図
である．第５図（ａ） ， （ｂ） ，（ｃ） ． （
ｄ） ， （ｅ） ， （Ｄは埋込金具をＦＲＰ翼の翼
根部に埋め込む工程の一例を示す図、第６図は、上記工
程により積層された翼根部の拡大縦断面図、第７図は第
６図の■一■矢視図、第８図は第６図の■一■横断面図
である．
（Ｏｌ）・・・ＦＲＰ翼
（０２）・・・翼取付け板，
（０４）・・・ナット
（２）・・・翼取付け板
（５）・・・埋込金物，
（５ｂ）・・・出っ張り，
（７）・・・固定用ボルト．
（Ｏｌａ）・・・フランジ，
（０３）・・・ボルト，
（１）・・・ＦＲＰ翼
（３）・・・取付ボルト，
（５ａ）・・・ねじ，
（６）・・・埋込金物固定治具FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is a longitudinal sectional view showing the shape of the embedded metal, and FIG. 3(a) is an example of the overall shape of an FRPil to which the present invention is applied. This is a diagram showing FIG. 3(b) is a diagram showing an example of the overall shape of a conventional FRP blade, and FIG. 4 is a longitudinal cross-sectional view showing the structure of the blade root. Figure 5 (a), (b), (c). (
d) , (e) , (D is a diagram showing an example of the process of embedding the embedded metal fittings into the blade root of an FRP wing, FIG. 6 is an enlarged vertical cross-sectional view of the blade root laminated by the above process, and FIG. 7 is a view from the ■1■ arrow in Fig. 6, and Fig. 8 is a cross sectional view of Fig. 6. ... Nut (2) ... Wing mounting plate (5) ... Embedded hardware, (5b) ... Protrusion, (7) ... Fixing bolt. (Ola) ... Flange, ( 03)...Bolt, (1)...FRP wing (3)...Mounting bolt, (5a)...Screw, (6)...Embedded hardware fixing jig
Claims (1)
込まれた円筒状の埋込金物と、同埋込金物の内部に装着
され、基端が上記翼根部の外に突出した締付ボルトと、
同締付ボルトの基端が挿入される穴を有する翼取付け板
と、同翼取付け板に上記基端を締付けるナットとを備え
たことを特徴とするＦＲＰ翼の取付装置。A plurality of cylindrical embedded metal fittings with a protrusion on the outer periphery and embedded in the blade root of an FRP wing, and a tightening bolt that is installed inside the embedded metal fitting and whose base end protrudes outside the blade root. and,
An FRP wing attachment device comprising: a wing attachment plate having a hole into which the base end of the tightening bolt is inserted; and a nut for tightening the base end on the wing attachment plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1148462A JP2601907B2 (en) | 1989-06-13 | 1989-06-13 | FRP wing mounting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1148462A JP2601907B2 (en) | 1989-06-13 | 1989-06-13 | FRP wing mounting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0315669A true JPH0315669A (en) | 1991-01-24 |
| JP2601907B2 JP2601907B2 (en) | 1997-04-23 |
Family
ID=15453293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1148462A Expired - Lifetime JP2601907B2 (en) | 1989-06-13 | 1989-06-13 | FRP wing mounting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2601907B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007073735A1 (en) * | 2005-12-28 | 2007-07-05 | Lm Glasfiber A/S | Levelling of root bushings on blades for wind turbines |
| WO2012111518A1 (en) * | 2011-02-18 | 2012-08-23 | 三菱重工業株式会社 | Blade-root-forming piece for wind turbine blade, blade root structure for wind turbine blade using same, wind turbine blade, wind turbine and method for producing wind turbine blade |
| JP2013096417A (en) * | 2011-11-04 | 2013-05-20 | Siemens Ag | Manufacture of root section |
| US8651816B2 (en) | 2007-03-06 | 2014-02-18 | Fantech Tecnologia Em Sistemas De Ventilacao Ltda | Fan blade connection |
| JP2023011495A (en) * | 2021-07-12 | 2023-01-24 | ゼネラル エレクトリック レノバブレス エスパーニャ， エセ．エレ． | Wind turbine blade assembly and methods |
-
1989
- 1989-06-13 JP JP1148462A patent/JP2601907B2/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007073735A1 (en) * | 2005-12-28 | 2007-07-05 | Lm Glasfiber A/S | Levelling of root bushings on blades for wind turbines |
| US7966726B2 (en) | 2005-12-28 | 2011-06-28 | Lm Glasfiber A/S | Levelling of root bushings on blades for wind turbines |
| US8651816B2 (en) | 2007-03-06 | 2014-02-18 | Fantech Tecnologia Em Sistemas De Ventilacao Ltda | Fan blade connection |
| WO2012111518A1 (en) * | 2011-02-18 | 2012-08-23 | 三菱重工業株式会社 | Blade-root-forming piece for wind turbine blade, blade root structure for wind turbine blade using same, wind turbine blade, wind turbine and method for producing wind turbine blade |
| JP2012172560A (en) * | 2011-02-18 | 2012-09-10 | Mitsubishi Heavy Ind Ltd | Blade root forming piece for wind turbine blade, blade root structure for wind turbine blade using the same, wind turbine blade, wind turbine and method for producing wind turbine blade |
| CN103370535A (en) * | 2011-02-18 | 2013-10-23 | 三菱重工业株式会社 | Blade-root-forming piece for wind turbine blade, blade root structure for wind turbine blade using same, wind turbine blade, wind turbine and method for producing wind turbine blade |
| JP2013096417A (en) * | 2011-11-04 | 2013-05-20 | Siemens Ag | Manufacture of root section |
| US9878504B2 (en) | 2011-11-04 | 2018-01-30 | Siemens Aktiengesellschaft | Manufacture of a root section having supporting rods and fibers therebetween |
| JP2023011495A (en) * | 2021-07-12 | 2023-01-24 | ゼネラル エレクトリック レノバブレス エスパーニャ， エセ．エレ． | Wind turbine blade assembly and methods |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2601907B2 (en) | 1997-04-23 |
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