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WO2012009855A1 - Nouvelle structure de pale en bambou - Google Patents

Nouvelle structure de pale en bambou Download PDF

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Publication number
WO2012009855A1
WO2012009855A1 PCT/CN2010/075387 CN2010075387W WO2012009855A1 WO 2012009855 A1 WO2012009855 A1 WO 2012009855A1 CN 2010075387 W CN2010075387 W CN 2010075387W WO 2012009855 A1 WO2012009855 A1 WO 2012009855A1
Authority
WO
WIPO (PCT)
Prior art keywords
blade
strip
bamboo composite
bamboo
composite material
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.)
Ceased
Application number
PCT/CN2010/075387
Other languages
English (en)
Chinese (zh)
Inventor
杜瑛卓
张旺
刘军华
王鹏飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BEIJING KHANWIND TECHNOLOGY Co Ltd
Original Assignee
BEIJING KHANWIND TECHNOLOGY Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BEIJING KHANWIND TECHNOLOGY Co Ltd filed Critical BEIJING KHANWIND TECHNOLOGY Co Ltd
Priority to CN201080067551XA priority Critical patent/CN102985683A/zh
Priority to PCT/CN2010/075387 priority patent/WO2012009855A1/fr
Publication of WO2012009855A1 publication Critical patent/WO2012009855A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/065—Rotors characterised by their construction elements
    • F03D1/0675—Rotors characterised by their construction elements of the blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/065—Rotors characterised by their construction elements
    • F03D1/0658—Arrangements for fixing wind-engaging parts to a hub
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2280/00—Materials; Properties thereof
    • F05B2280/40—Organic materials
    • F05B2280/4002—Cellulosic materials, e.g. wood
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2280/00—Materials; Properties thereof
    • F05B2280/40—Organic materials
    • F05B2280/4011—Organic materials not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2280/00—Materials; Properties thereof
    • F05B2280/60—Properties or characteristics given to material by treatment or manufacturing
    • F05B2280/6003—Composites; e.g. fibre-reinforced
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2280/00—Materials; Properties thereof
    • F05B2280/60—Properties or characteristics given to material by treatment or manufacturing
    • F05B2280/6013—Fibres
    • 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

Definitions

  • the invention relates to a wind turbine blade structure mainly composed of a bamboo composite material and a small amount of glass fiber composite material or carbon fiber composite material.
  • bamboo leaves refer to the main material of the blade as a bamboo composite material, including a small amount of glass fiber, PVC or foam, and the blade is integrated by resin bonding, making the bamboo composite material the main bearing structure in the blade.
  • the cost performance of the blade is an important factor in measuring blade performance, depending on blade power and manufacturing costs.
  • the length of the blade determines the final power generation, but as the length of the blade increases, the weight and cost of the blade multiply. Therefore, at the beginning of the design, the power, structural safety, and cost performance of the blade must be considered.
  • bamboo Due to its high strength, low density and good mechanical properties, bamboo can use light weight bamboo as the main material when designing long blades, so as to reduce the weight of the whole blade, so that bamboo leaves can be applied to several megawatts. Tile super large wind turbines.
  • bamboo has the natural advantages of short growth cycle, sufficient resources, and low processing cost. Therefore, the advantages of bamboo leaves in terms of cost performance are more obvious.
  • bamboo blades are lighter in weight, lower in cost and more cost effective.
  • the bamboo composite material is based on the fiber in the natural bamboo material, which is more conducive to the recycling and reuse of the blade after its service life.
  • the object of the present invention is to apply a bamboo composite material to a large wind turbine blade and to optimize the performance, cost and safety of the bamboo blade.
  • bamboo composite blades are composed of a shell and a web, just like a normal blade structure.
  • the structural material of the through blade is a spar cap made of FRP, which has a constant width in the blade casing, and the thickness is stepped thinner from the blade root to the blade tip.
  • the bamboo composite material leaf shell contains strip-shaped bamboo composite materials, and the strip-shaped bamboo composite materials are arranged in a certain order in the shell, and the thickness is uniform, but the distribution in the width direction of the shell is the leaf root. Gradually reduce to the tip of the blade, forming a gradual shape with a gentle transition.
  • Ordinary blades use a spar cap made of FRP as the main structural material, and it is required to make the girder in advance.
  • FRP is made by infiltrating glass fiber with resin.
  • the spar cap made of FRP should not be too wide to fit well with the blade mould.
  • the innovative blade structure of the present invention is determined by the fact that the bamboo processing process is more suitable for processing into equal thickness sheets. This innovative structure also achieves structural design optimization with reduced leaf tip to tip material, but greatly reduces the use of expensive filler materials, thereby reducing blade costs.
  • the gentle transition of the bamboo composite material from the gradual shape of the blade root to the tip of the blade is achieved by the oblique angle of the outer strip-shaped bamboo composite material.
  • the beam caps of ordinary blades are made of glass fiber, each layer of glass fiber is thin, and a step-like transition can be used.
  • the bamboo strip has a certain width. In order to avoid stress concentration, the bamboo strip as the main structural material must make the width of the bamboo pavement change as gently as possible, and the stepped structure must not appear.
  • Part of the space in the blade shell where the bamboo composite is not placed is filled with a low density core material such as balsa or foam.
  • the inner and outer surfaces of the bamboo composite within the blade shell contain multidirectional glass fibers.
  • the shell contains a bamboo composite material.
  • part of the strip-shaped bamboo composite material in the shell is replaced by a strip made of glass fiber or carbon fiber as a main material by a pultrusion process or a vacuum introduction process.
  • Composite material These strip composites, which are made of glass fiber or carbon fiber as the main material, have better strength and modulus of elasticity than bamboo, but have higher density. Putting them in a part with a small structural safety factor is beneficial to increase the structural safety factor of the product, but does not add too much weight.
  • the resin material is filled in the gap between the strip-shaped composite material monomer and the monomer, so that the strip-shaped composite material becomes a whole in the blade shell.
  • the vacuum introduction process is applied to the manufacture of bamboo composite blades. Compared with ordinary blades, it can save resin matrix material and has a faster vacuum introduction speed, which is beneficial to reduce blade cost and increase blade production speed.
  • the blade root is provided with a bolt sleeve for connecting with the wind turbine hub; the blade also includes an attachment device such as a lightning receptor and a wire for transmitting the electricity to the wind turbine through the wire when the blade is struck by lightning And then to the ground to prevent damage to the blades.
  • an attachment device such as a lightning receptor and a wire for transmitting the electricity to the wind turbine through the wire when the blade is struck by lightning And then to the ground to prevent damage to the blades.
  • the invention fully utilizes the characteristics of the bamboo composite material with large modulus, low density, good structural performance, and high strength of the carbon fiber composite material or the FRP composite material, thereby optimizing the safety performance of the blade and reducing the weight of the blade.
  • the material of the blade body is in the form of strips, material transportation and layup are more convenient.
  • Figure 1 is a perspective view of the bamboo blade
  • Figure 2 is a cross-sectional view of the section of the blade A shown in Figure 1;
  • Figure 3 is a partial enlarged view of a portion E of the section shown in Figure 2;
  • Figure 4 is a cross-sectional view of the section of the blade B shown in Figure 1;
  • Figure 5 is a plan view of the blade shown in Figure 1;
  • Figure 6 is a perspective view of the strip-shaped bamboo composite material shown in Figure 5;
  • Figure 7 is a partial enlarged view of the X portion shown in Figure 1;
  • Figure 8 is a partial enlarged view of the Y portion shown in Figure 1. detailed description:
  • Figure 1 shows a perspective view of a wind turbine blade, where X represents the blade root portion of the blade and Y represents the blade tip portion of the blade.
  • the 2 is a cross-sectional view of the blade near A of the blade root portion, the blade includes two parts of the casing 1 and the web 2, and the casing and the web are both typical sandwich structures, that is, the inner surface layer and the outer surface layer are thinner but The glass steel layer with higher strength has a thicker but lower strength core material in the middle.
  • the core material of the shell is bamboo composite 3 and low density balsa or foam 4, and the core of the web is low density balsa or foam 4 .
  • bamboo composite material 3 is the main carrier material of the blade, and Basha wood or foam 4 only serves as a filling.
  • Fig. 3 is a partial enlarged view of a portion E of the section shown in Fig. 2.
  • the bamboo composite material in the casing is composed of a certain number of strip-shaped bamboo composite materials closely arranged together, and the resin is filled between the monomer and the monomer by resin vacuum introduction technology. In the gap, the bamboo composite material becomes integral in the blade.
  • the inner and outer sides of the bamboo composite material 3 are thin glass steel layers 6 having a multi-directional glass fiber layer.
  • Figure 5 is a plan view of the blade shown in Figure 1, and the dotted line range indicated by reference numeral 7 represents the distribution of the bamboo composite material in the blade, which is characterized by the fact that the bamboo composite material gradually decreases from the blade root to the blade tip, in the blade shell.
  • the body forms a gentle gradation, which is accomplished by the bevel of the outer strip of bamboo composite, as shown in Figure 6.
  • a small amount of strip reinforcing material 5 is placed on the middle portion 10 of the blade instead of the strip-shaped bamboo composite material, and the strip reinforcing material is made of glass fiber or carbon fiber by a pultrusion process, for convenience
  • the replacement of the strip-shaped bamboo composite material is similar in size to the strip-shaped bamboo composite material.
  • the strip-shaped reinforcing material and the strip-shaped bamboo composite material are closely arranged together, and the resin is vacuum-introduced to make it integral.
  • the shell and the web are integrally joined by bonding, and the position where the web is bonded to the shell is located within the range of the bamboo composite material in the shell, so that the web is composited with the bamboo.
  • the material forms a box-like structure in the blade.
  • the root of the blade contains a bolt sleeve and a screw that are uniformly distributed, as shown in Figure 7, the bolt sleeve 8 and the screw
  • the entire blade is connected to the wind turbine by means of a screw 9 which is distributed at the root of the blade.
  • the tip of the blade contains a lightning receptor 12 for avoiding damage to the blade by lightning during operation of the blade and conducting lightning through the wire 11 to the outside of the blade, as shown in FIG.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Moulding By Coating Moulds (AREA)
  • Wind Motors (AREA)

Abstract

Une pale d'éolienne comprend une enveloppe (1) et une âme (2). L'enveloppe (1) comprend des bandes de matériau composé en bambou (3), les bandes de matériau composé en bambou (3) étant agencées de façon ordonnée, le nombre des bandes de matériau composé en bambou (3) diminuant de la base vers la pointe de la pale, les bandes de matériau composé en bambou extérieures (3) comportant des surfaces obliques, une forme lentement progressive et transitoire étant formée. La surface internet et la surface externe des bandes de matériau composé en bambou (3) comprennent de la fibre de verre (6). De la résine est répandue dans les bandes de matériau composé en bambou (3) par un processus d'infusion sous vide, la pale formant un ensemble.
PCT/CN2010/075387 2010-07-22 2010-07-22 Nouvelle structure de pale en bambou Ceased WO2012009855A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201080067551XA CN102985683A (zh) 2010-07-22 2010-07-22 新型竹质叶片结构
PCT/CN2010/075387 WO2012009855A1 (fr) 2010-07-22 2010-07-22 Nouvelle structure de pale en bambou

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2010/075387 WO2012009855A1 (fr) 2010-07-22 2010-07-22 Nouvelle structure de pale en bambou

Publications (1)

Publication Number Publication Date
WO2012009855A1 true WO2012009855A1 (fr) 2012-01-26

Family

ID=45496447

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2010/075387 Ceased WO2012009855A1 (fr) 2010-07-22 2010-07-22 Nouvelle structure de pale en bambou

Country Status (2)

Country Link
CN (1) CN102985683A (fr)
WO (1) WO2012009855A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1359450A (zh) * 1999-06-21 2002-07-17 Lm玻璃纤维制品有限公司 具有除冰与避雷保护的风力涡轮机桨叶
CN1533476A (zh) * 2001-07-19 2004-09-29 Neg 风力涡轮机叶片
CN1977108A (zh) * 2004-06-30 2007-06-06 维斯塔斯风力系统有限公司 由两个分离的部分制成的风轮机叶片以及装配方法
CN101235797A (zh) * 2008-02-15 2008-08-06 无锡瑞尔竹风科技有限公司 竹制复合材料风力机叶片及其真空灌输工艺
CN101260861A (zh) * 2007-03-09 2008-09-10 通用电气公司 用于风力涡轮机叶片的集成抗剪腹板
CN201155423Y (zh) * 2008-02-15 2008-11-26 无锡瑞尔竹风科技有限公司 竹制复合材料风力发电机叶片
CN201228611Y (zh) * 2008-04-11 2009-04-29 江苏天奇物流系统工程股份有限公司 带切角的竹层积材组装的风力发电机叶片体

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1359450A (zh) * 1999-06-21 2002-07-17 Lm玻璃纤维制品有限公司 具有除冰与避雷保护的风力涡轮机桨叶
CN1533476A (zh) * 2001-07-19 2004-09-29 Neg 风力涡轮机叶片
CN1977108A (zh) * 2004-06-30 2007-06-06 维斯塔斯风力系统有限公司 由两个分离的部分制成的风轮机叶片以及装配方法
CN101260861A (zh) * 2007-03-09 2008-09-10 通用电气公司 用于风力涡轮机叶片的集成抗剪腹板
CN101235797A (zh) * 2008-02-15 2008-08-06 无锡瑞尔竹风科技有限公司 竹制复合材料风力机叶片及其真空灌输工艺
CN201155423Y (zh) * 2008-02-15 2008-11-26 无锡瑞尔竹风科技有限公司 竹制复合材料风力发电机叶片
CN201228611Y (zh) * 2008-04-11 2009-04-29 江苏天奇物流系统工程股份有限公司 带切角的竹层积材组装的风力发电机叶片体

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