WO2015066986A1 - Horizontal-axis wind turbine - Google Patents

Horizontal-axis wind turbine Download PDF

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Publication number
WO2015066986A1
WO2015066986A1 PCT/CN2014/072152 CN2014072152W WO2015066986A1 WO 2015066986 A1 WO2015066986 A1 WO 2015066986A1 CN 2014072152 W CN2014072152 W CN 2014072152W WO 2015066986 A1 WO2015066986 A1 WO 2015066986A1
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WO
WIPO (PCT)
Prior art keywords
blade
hub
motor
axis wind
wind wheel
Prior art date
Application number
PCT/CN2014/072152
Other languages
French (fr)
Chinese (zh)
Inventor
俞红鹰
皮开红
Original Assignee
广州红鹰能源科技有限公司
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Publication of WO2015066986A1 publication Critical patent/WO2015066986A1/en

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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
    • F03D1/0608—Rotors characterised by their aerodynamic shape
    • F03D1/0625—Rotors characterised by their aerodynamic shape of the whole rotor, i.e. form features of the rotor unit
    • 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
    • F05B2240/00—Components
    • F05B2240/20—Rotors
    • F05B2240/33—Shrouds which are part of or which are rotating with the rotor
    • 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
    • F05B2250/00—Geometry
    • F05B2250/60—Structure; Surface texture
    • F05B2250/61—Structure; Surface texture corrugated
    • 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 utility model relates to a horizontal axis wind power generator. Background technique
  • wind power generation equipment mainly includes horizontal axis wind turbines and vertical axis wind turbines.
  • the horizontal axis wind turbine is mainly composed of a tower, a generator and a wind wheel.
  • the generator is installed on the tower column, the wind wheel is installed on the generator, and the wind wheel rotates to make the generator work. Therefore, the structure and strength of the wind wheel play a very important role in the horizontal axis wind turbine, and To solve the technical problems caused by the wind wheel, people have done a lot of research on the wind wheel.
  • a diffusion type wind wheel is disclosed in the patent document No. 201010555574.7, the disclosure of which is incorporated herein by reference.
  • the diffusion type wind wheel is composed of a hub, a blade and a rim, although the structure is simple and does not increase.
  • the available power of the wind wheel can be maximized.
  • the use is safe and stable, the noise is small, and the flow and power can be greatly increased.
  • the position of the wind wheel changes with the change of the wind direction. Therefore, all directions of the blade may be stressed and uneven, and the connection angle between the blade and the hub is rectangular. In this case, the connection between the blade and the hub is prone to a gyro effect, between the blade and the hub. It is easy to break, so the strength is low. Summary of the invention
  • the present invention provides a horizontal axis wind turbine.
  • a horizontal axis wind power generator includes a tower pole, a motor housing, a tail rudder, an end cover, a motor stator, a motor rotor and a wind wheel;
  • the motor housing is provided in the tower column, and the tail
  • the rudder is arranged at the rear of the motor housing, the end cover is arranged at the front end of the motor housing, the motor stator is installed in the motor housing, the motor rotor is arranged in the motor stator, and the output shaft of the motor rotor passes through the end cover and extends
  • the wind cover is disposed on the protruding end of the output shaft of the motor rotor;
  • the wind wheel comprises a hub, a blade and a rim, one end of the blade is connected to the hub, and the rim is sleeved on the blade tip; the blade root
  • the section is elliptical.
  • the blade root has an elliptical cross section, and the blade tips are connected together by the rim, the blade is not easily twisted.
  • the force around the blade root is uniform, thereby improving the blade and the hub.
  • Connection strength Since the rims connect the tips together, the vibration of the tip of the wind wheel during the rotation is small, thereby reducing the amount of noise, and the rim can reduce the displacement of the blade in the wielding direction, thereby reducing the loss of wind energy at the tip end. Therefore, the utilization rate of wind energy is improved.
  • the blade connects the hub and the rim to strengthen the skeleton, and therefore, the strength of the entire wind wheel is good.
  • a transition arc is arranged between the blade root and the hub, which can further improve the connection strength between the hub and the blade.
  • noise reduction lines are provided on the back surface of the blade to reduce noise during operation of the wind wheel. Further, the hub, the blade and the rim are integrated, so that the manufacturing cost is low and the strength is high.
  • a weight reducing hole is provided on the hub to reduce the weight of the hub.
  • Figure 1 is a perspective view of a horizontal axis wind turbine.
  • Figure 2 is a front view of a horizontal axis wind turbine.
  • Figure 3 is a cross-sectional view of the horizontal axis wind turbine A-A.
  • Figure 4 is a schematic view of the structure of the back of the wind wheel.
  • Figure 5 is an enlarged view of A in Figure 1.
  • Figure 6 is an enlarged view of B in Figure 3.
  • the horizontal axis wind power generator includes a tower 1, a motor housing 2, a rudder 3, an end cover 4, a motor stator 5, a motor rotor 6, and a rotor 7.
  • the motor housing 2 has a cavity 21 in which the cavity 21 can reduce the weight of the motor housing and, on the other hand, the motor stator 5 and the motor rotor 6.
  • the middle portion of the motor housing is mounted on the tower 1 .
  • the rudder 3 is provided at the rear of the motor casing 2 and is integrally formed with the motor casing 2.
  • the end cap 4 is mounted at the front end of the motor housing 2.
  • the motor stator 5 is mounted on the inner wall of the motor housing 2, the motor rotor 6 is disposed in the motor stator 5, the motor rotor 6 has an output shaft, and the output shaft extends through the end cover 4 to extend the end cover, on the output shaft and Bearings are provided between the end caps 4.
  • the wind turbine 7 includes a hub 71, blades 72 and rims 73.
  • the hub 71 has a hole 711 in the center for mounting the output shaft; the end surface of the hub 71 is located at the outer side of the hole 711 and is provided with a weight reducing hole 712. On the one hand, the weight of the wind wheel can be reduced, so that the load of the wind wheel is reduced, and the other is It also improves the strength of the hub.
  • the blade 72 includes a blade root portion 721, a blade middle portion 722 and a blade tip 723 which are sequentially connected. As shown in FIG.
  • the blade root portion 721 has an elliptical cross section, wherein the ratio of the long diameter to the short diameter of the elliptical shape is 1: 0.8-0.99, the blade is integrally formed with the hub, and a transition arc is arranged between the blade root 721 and the hub 71 to improve the connection strength; as shown in FIG. 7, the noise reduction 724 is provided on the back of the blade to reduce the wind. The noise when working at the wheel.
  • the rim 72 is placed over the blade tip 723 of the blade.
  • a deflector cap 9 is connected to the outer side of the wind wheel 7 via a bolt 8 on the output shaft.
  • the blade root portion 721 has an elliptical cross section and the blade tips 723 are connected together by the rim 73, the blade is not easily twisted.
  • the force around the blade root portion 721 is uniform.
  • the connection strength between the blade and the hub Since the rim 73 connects the blade tips 723 together, the vibration of the blade tip during the rotation of the wind wheel 7 is small, thereby reducing the amount of noise, and the rim can reduce the amount of displacement in the blade wiping direction, thereby reducing the wind energy at the tip end portion. The loss, therefore, improves the utilization of wind energy.
  • the blade connects the hub and the rim to enhance the skeleton, and therefore, the strength of the entire wind wheel is good.

Abstract

A horizontal-axis wind turbine comprises a pole (1), a motor housing (2), a tail vane (3), an end cover (4), a motor stator (5), a motor rotor (6), and a wind wheel (7). The wind wheel comprises a hub (71), blades (72), and a rim (73). One end of the blades is connected to the hub, and the rim is placed around the tips of the blades; the cross section of the roots of the blades is elliptical. Said structure can enhance the strength of connection between the blades and the hub.

Description

说 明 书  Description
一种水平轴风力发电机 技术领域  Horizontal axis wind turbine technical field
本实用新型涉及水平轴风力发电机。 背景技术  The utility model relates to a horizontal axis wind power generator. Background technique
现在不可再生能源的存储量越来越少了， 因此， 需要需求一些可再 生能源或新的能源来替代不可再生能源。 其中， 风能就是可再生能源中 的一种， 该能源利用起来环保， 其应用将越来越广泛。  Nowadays, the amount of non-renewable energy is becoming less and less, so it is necessary to replace some non-renewable energy with renewable energy or new energy. Among them, wind energy is one of renewable energy sources, which is environmentally friendly and its application will become more and more extensive.
现在， 对风能利用最多的是风力发电， 目前风力发电的设备主要有 水平轴风力发电机和垂直轴风力发电机两种。 其中， 水平轴风力发电机 主要由塔柱、 发电机及风轮组成。 发电机安装在塔柱上， 风轮安装在发 电机上， 风轮旋转则可使发电机工作， 因此， 风轮的结构、 强度等在水 平轴风力发电机中起到了非常重要的作用， 而为了解决因风轮产生的技 术问题， 人们对风轮进行了许多的研究。 如在申请号为 201010555574.7 公开日为 2012.5.30的专利文献中公开了一种扩散型风轮， 并具体公开了 扩散型风轮由轮毂、 叶片及轮圈组成， 虽然其结构简单， 在不增大风轮 直径的情况下可以最大限度的提高风轮的可用功率， 使用安全稳定， 噪 音小， 并且可以大幅度地增加流量和功率， 但是， 风轮的位置是随风向 的变化而变化的， 因此， 叶片的各个方向都有可能受力， 且不均匀， 而 叶片与轮毂的连接截面为长方形， 在这种情况下， 叶片与轮毂之间的连 接部位容易产生陀螺效应， 叶片和轮毂之间容易断裂， 因此， 强度低。 发明内容  At present, the most used wind energy is wind power generation. Currently, wind power generation equipment mainly includes horizontal axis wind turbines and vertical axis wind turbines. Among them, the horizontal axis wind turbine is mainly composed of a tower, a generator and a wind wheel. The generator is installed on the tower column, the wind wheel is installed on the generator, and the wind wheel rotates to make the generator work. Therefore, the structure and strength of the wind wheel play a very important role in the horizontal axis wind turbine, and To solve the technical problems caused by the wind wheel, people have done a lot of research on the wind wheel. A diffusion type wind wheel is disclosed in the patent document No. 201010555574.7, the disclosure of which is incorporated herein by reference. It is specifically disclosed that the diffusion type wind wheel is composed of a hub, a blade and a rim, although the structure is simple and does not increase. In the case of large wind wheel diameter, the available power of the wind wheel can be maximized. The use is safe and stable, the noise is small, and the flow and power can be greatly increased. However, the position of the wind wheel changes with the change of the wind direction. Therefore, all directions of the blade may be stressed and uneven, and the connection angle between the blade and the hub is rectangular. In this case, the connection between the blade and the hub is prone to a gyro effect, between the blade and the hub. It is easy to break, so the strength is low. Summary of the invention
为了使叶片与轮毂的连接强度提高， 本实用新型提供了一种水平轴 风力发电机。  In order to improve the connection strength between the blade and the hub, the present invention provides a horizontal axis wind turbine.
为达到上述目的， 一种水平轴风力发电机， 包括塔杆、 电机壳体、 尾舵、 端盖、 电机定子、 电机转子及风轮； 电机壳体设有在塔柱内， 尾 舵设在电机壳体的后部， 端盖设在电机壳体的前端， 电机定子安装在电 机壳体内， 电机转子设在电机定子内， 电机转子的输出轴穿过端盖且伸 出端盖； 风轮设在电机转子输出轴的伸出端上； 所述的风轮包括轮毂、 叶片及轮圈， 叶片的一端连接在轮毂上， 轮圈套在叶片的叶尖上； 叶片 根部的截面为椭圆形。 In order to achieve the above object, a horizontal axis wind power generator includes a tower pole, a motor housing, a tail rudder, an end cover, a motor stator, a motor rotor and a wind wheel; the motor housing is provided in the tower column, and the tail The rudder is arranged at the rear of the motor housing, the end cover is arranged at the front end of the motor housing, the motor stator is installed in the motor housing, the motor rotor is arranged in the motor stator, and the output shaft of the motor rotor passes through the end cover and extends The wind cover is disposed on the protruding end of the output shaft of the motor rotor; the wind wheel comprises a hub, a blade and a rim, one end of the blade is connected to the hub, and the rim is sleeved on the blade tip; the blade root The section is elliptical.
上述结构， 由于叶片根部的截面为椭圆形， 同时通过轮圈将叶尖连 接在一起， 叶片不易扭曲， 当风轮在旋转过程中， 叶片根部四周的受力 均匀， 因此， 提高了叶片与轮毂的连接强度。 由于轮圈将叶尖连接在一 起， 因此， 风轮在旋转过程中叶尖的振动小， 从而降低了噪音量， 而且 轮圈能减少叶片挥舞方向的位移量， 从而减少叶尖部位风能的流失， 因 此， 提高了风能的利用率。 所述的叶片将轮毂和轮圈连接起来， 起到了 加强骨架的作用， 因此， 整个风轮的强度好。  In the above structure, since the blade root has an elliptical cross section, and the blade tips are connected together by the rim, the blade is not easily twisted. When the wind wheel rotates, the force around the blade root is uniform, thereby improving the blade and the hub. Connection strength. Since the rims connect the tips together, the vibration of the tip of the wind wheel during the rotation is small, thereby reducing the amount of noise, and the rim can reduce the displacement of the blade in the wielding direction, thereby reducing the loss of wind energy at the tip end. Therefore, the utilization rate of wind energy is improved. The blade connects the hub and the rim to strengthen the skeleton, and therefore, the strength of the entire wind wheel is good.
进一步的， 叶片根部与轮毂之间设有过渡圆弧， 能进一步提高轮毂 和叶片之间的连接强度。  Further, a transition arc is arranged between the blade root and the hub, which can further improve the connection strength between the hub and the blade.
进一步的， 在叶片的背面设有降噪紋， 以降低风轮工作时的噪音。 进一步的， 轮毂、 叶片和轮圈为一体结构， 这样， 制造成本低， 而 且强度高。  Further, noise reduction lines are provided on the back surface of the blade to reduce noise during operation of the wind wheel. Further, the hub, the blade and the rim are integrated, so that the manufacturing cost is low and the strength is high.
进一步的， 在轮毂上设有减重孔， 以减轻轮毂的重量。 附图说明  Further, a weight reducing hole is provided on the hub to reduce the weight of the hub. DRAWINGS
图 1为水平轴风力发电机的立体图。  Figure 1 is a perspective view of a horizontal axis wind turbine.
图 2为水平轴风力发电机的主视图。  Figure 2 is a front view of a horizontal axis wind turbine.
图 3为水平轴风力发电机 A-A剖视图。  Figure 3 is a cross-sectional view of the horizontal axis wind turbine A-A.
图 4为风轮背面结构示意图。  Figure 4 is a schematic view of the structure of the back of the wind wheel.
图 5为图 1中 A的放大图。  Figure 5 is an enlarged view of A in Figure 1.
图 6为图 3中 B的放大图。  Figure 6 is an enlarged view of B in Figure 3.
图 7为图 4中 C的放大图。 具体实施方式 下面结合附图和具体实施方式对本实用新型进行进一步详细说明。 如图 1至图 3所示， 水平轴风力发电机包括塔柱 1、 电机壳体 2、 尾 舵 3、 端盖 4、 电机定子 5、 电机转子 6及风轮 7。 Figure 7 is an enlarged view of C in Figure 4. detailed description The present invention will be further described in detail below in conjunction with the drawings and specific embodiments. As shown in FIGS. 1 to 3, the horizontal axis wind power generator includes a tower 1, a motor housing 2, a rudder 3, an end cover 4, a motor stator 5, a motor rotor 6, and a rotor 7.
电机壳体 2内具有腔体 21， 腔体 21—方面能减轻电机壳体的重量， 另一方面用于容置电机定子 5和电机转子 6。电机壳体的中部安装在塔柱 1上。尾舵 3设在电机壳体 2的后部， 且与电机壳体 2—体成型。所述的 端盖 4安装在电机壳体 2的前端。 所述的电机定子 5安装在电机壳体 2 的内壁上， 电机转子 6设在电机定子 5内， 电机转子 6具有输出轴， 输 出轴穿过端盖 4伸出端盖， 在输出轴和端盖 4之间设置轴承。  The motor housing 2 has a cavity 21 in which the cavity 21 can reduce the weight of the motor housing and, on the other hand, the motor stator 5 and the motor rotor 6. The middle portion of the motor housing is mounted on the tower 1 . The rudder 3 is provided at the rear of the motor casing 2 and is integrally formed with the motor casing 2. The end cap 4 is mounted at the front end of the motor housing 2. The motor stator 5 is mounted on the inner wall of the motor housing 2, the motor rotor 6 is disposed in the motor stator 5, the motor rotor 6 has an output shaft, and the output shaft extends through the end cover 4 to extend the end cover, on the output shaft and Bearings are provided between the end caps 4.
如图 1至图 4所示， 所述的风轮 7包括轮毂 71、 叶片 72及轮圈 73。 轮毂 71中心具有孔 711， 用于安装输出轴； 轮毂 71的端面位于孔 711的 外侧设有减重孔 712，该结构一方面能减轻风轮的重量，使得风轮的负载 减小， 另一方面还能提高轮毂的强度。所述的叶片 72包括依次连接的叶 片根部 721、 叶片中部 722及叶尖 723， 如图 6所示， 叶片根部 721的截 面呈椭圆形， 其中椭圆形的长径和短径之比为 1 : 0.8-0.99， 叶片与轮毂 一体成型，叶片根部 721与轮毂 71之间设有过渡圆弧，以提高连接强度; 如图 7所示， 在叶片的背面设有降噪紋 724， 能减小风轮工作时的噪音。 轮圈 72套在叶片的叶尖 723上。  As shown in Figs. 1 to 4, the wind turbine 7 includes a hub 71, blades 72 and rims 73. The hub 71 has a hole 711 in the center for mounting the output shaft; the end surface of the hub 71 is located at the outer side of the hole 711 and is provided with a weight reducing hole 712. On the one hand, the weight of the wind wheel can be reduced, so that the load of the wind wheel is reduced, and the other is It also improves the strength of the hub. The blade 72 includes a blade root portion 721, a blade middle portion 722 and a blade tip 723 which are sequentially connected. As shown in FIG. 6, the blade root portion 721 has an elliptical cross section, wherein the ratio of the long diameter to the short diameter of the elliptical shape is 1: 0.8-0.99, the blade is integrally formed with the hub, and a transition arc is arranged between the blade root 721 and the hub 71 to improve the connection strength; as shown in FIG. 7, the noise reduction 724 is provided on the back of the blade to reduce the wind. The noise when working at the wheel. The rim 72 is placed over the blade tip 723 of the blade.
如图 1至图 3所示， 在输出轴上位于风轮 7的外侧通过螺栓 8连接 有导流帽 9。  As shown in Figs. 1 to 3, a deflector cap 9 is connected to the outer side of the wind wheel 7 via a bolt 8 on the output shaft.
本实施方式， 由于叶片根部 721的截面为椭圆形， 同时通过轮圈 73 将叶尖 723连接在一起， 叶片不易扭曲， 当风轮 7旋转过程中， 叶片根 部 721 四周的受力均匀， 因此， 提高了叶片与轮毂的连接强度。 由于轮 圈 73将叶尖 723连接在一起，因此，风轮 7在旋转过程中叶尖的振动小， 从而降低了噪音量， 而且轮圈能减少叶片挥舞方向的位移量， 从而减少 叶尖部位风能的流失， 因此， 提高了风能的利用率。 所述的叶片将轮毂 和轮圈连接起来， 起到了加强骨架的作用， 因此， 整个风轮的强度好。  In this embodiment, since the blade root portion 721 has an elliptical cross section and the blade tips 723 are connected together by the rim 73, the blade is not easily twisted. When the wind wheel 7 rotates, the force around the blade root portion 721 is uniform. Improve the connection strength between the blade and the hub. Since the rim 73 connects the blade tips 723 together, the vibration of the blade tip during the rotation of the wind wheel 7 is small, thereby reducing the amount of noise, and the rim can reduce the amount of displacement in the blade wiping direction, thereby reducing the wind energy at the tip end portion. The loss, therefore, improves the utilization of wind energy. The blade connects the hub and the rim to enhance the skeleton, and therefore, the strength of the entire wind wheel is good.

Claims

权 利 要 求 书 Claim
1.一种水平轴风力发电机， 包括塔杆、 电机壳体、 尾舵、 端盖、 电 机定子、 电机转子及风轮； 电机壳体设有在塔柱内， 尾舵设在电机壳体 的后部， 端盖设在电机壳体的前端， 电机定子安装在电机壳体内， 电机 转子设在电机定子内， 电机转子的输出轴穿过端盖且伸出端盖； 风轮设 在电机转子输出轴的伸出端上； 所述的风轮包括轮毂、 叶片及轮圈， 叶 片的一端连接在轮毂上， 轮圈套在叶片的叶尖上； 其特征在于： 叶片根 部的截面为椭圆形。  1. A horizontal axis wind power generator comprising a tower pole, a motor housing, a tail rudder, an end cover, a motor stator, a motor rotor and a wind wheel; the motor housing is disposed in the tower column, and the tail rudder is set in the electric a rear end of the machine housing, the end cover is disposed at a front end of the motor housing, the motor stator is installed in the motor housing, the motor rotor is disposed in the motor stator, and the output shaft of the motor rotor passes through the end cover and protrudes from the end cover; The wind wheel is disposed on the protruding end of the output shaft of the rotor of the motor; the wind wheel comprises a hub, a blade and a rim, one end of the blade is connected to the hub, and the rim is sleeved on the blade tip; the characteristic is: the blade root The section is elliptical.
2.根据权利要求 1所述的水平轴风力发电机， 其特征在于： 叶片根 部与轮毂之间设有过渡圆弧。  The horizontal-axis wind power generator according to claim 1, wherein a transition arc is provided between the blade root and the hub.
3.根据权利要求 1所述的水平轴风力发电机， 其特征在于： 在叶片 的背面设有降噪紋。  The horizontal-axis wind power generator according to claim 1, wherein a noise reduction pattern is provided on a back surface of the blade.
4.根据权利要求 1所述的水平轴风力发电机， 其特征在于： 轮毂、 叶片和轮圈为一体结构。  4. A horizontal axis wind turbine according to claim 1, wherein: the hub, the vanes and the rim are of unitary construction.
5.根据权利要求 1所述的水平轴风力发电机， 其特征在于： 在轮毂 上设有减重孔。  The horizontal-axis wind power generator according to claim 1, wherein a weight reducing hole is provided in the hub.
PCT/CN2014/072152 2013-11-07 2014-02-17 Horizontal-axis wind turbine WO2015066986A1 (en)

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CN107605657A (en) * 2017-09-26 2018-01-19 南通大鲸智能科技有限公司 A kind of special blade of wind-power electricity generation

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JP3991103B2 (en) * 2003-07-07 2007-10-17 国立大学法人 琉球大学 Seven arc thin wing
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CN201874756U (en) * 2010-11-23 2011-06-22 山东安华拓源能源有限公司 Diffusion type wind wheel
CN102966487A (en) * 2012-11-28 2013-03-13 苏州源源机械设备有限公司 Noise-reduction fan blade for horizontal-shaft wind driven generator
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19719221C1 (en) * 1997-05-07 1998-10-29 Roland Stelzer Rotor blade for wind generator
JP3991103B2 (en) * 2003-07-07 2007-10-17 国立大学法人 琉球大学 Seven arc thin wing
CN201083185Y (en) * 2007-04-18 2008-07-09 广州红鹰能源科技有限公司 Small-sized wind-driven generator
CN103097722A (en) * 2010-07-16 2013-05-08 Lm玻璃纤维制品有限公司 Wind turbine blade with narrow shoulder and relatively thick airfoil profiles
CN201874756U (en) * 2010-11-23 2011-06-22 山东安华拓源能源有限公司 Diffusion type wind wheel
CN102966487A (en) * 2012-11-28 2013-03-13 苏州源源机械设备有限公司 Noise-reduction fan blade for horizontal-shaft wind driven generator

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