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    • 35. 发明申请
    • LIGHTNING PROTECTION OF A PITCH-CONTROLLED WIND TURBINE BLADE
    • 一种间距控制的风力机叶片的雷电防护
    • WO2004044419A1
    • 2004-05-27
    • PCT/DK2003/000778
    • 2003-11-12
    • LM GLASFIBER A/SMØLLER LARSEN, FlemmingHANSEN, Lars, Bo
    • MØLLER LARSEN, FlemmingHANSEN, Lars, Bo
    • F03D11/00
    • H02G13/80F03D80/00F03D80/30F03D80/70H02G13/00H02G13/40Y02E10/721
    • A wind turbine rotor including a rotor hub (3) and a plurality of blades (4), and where each blade root (16) is connected to said rotor hub through a pitch bearing (5) in such a manner that the pitch angle of the blade is adjustable by a turning of the blade about its longitudinal axis relative to the rotor hub. The blade is provided with at least one electrically conducting lightening down-conductor (6) extending in the longitudinal direction of the blade to the blade root and being electrically isolated from the pitch bearing (5). A spark gap (15) is provided between the lightning down-conductor and the rotor hub, said spark gap (15) being adapted to conduct a lightning current passing through the lightning down-conductor. A sliding contact connection (7, 12) is provided parallel to the spark gap (15) between the lightning down-conductor (6) and the rotor hub (3), said sliding contact connection ensuring electrical contact between said lightening down-conductor (6) and said rotor hub (3) irrespective of the pitch angle of the blade. The invention also relates to a wind turbine including such a rotor.
    • 风力涡轮机转子包括转子轮毂(3)和多个叶片(4),并且其中每个叶片根部(16)通过变桨轴承(5)连接到所述转子轮毂 通过叶片相对于转子毂围绕其纵向轴线的转动来调节叶片的倾角。 该叶片设有至少一个导电的减轻导体(6),该导体减轻导体在叶片的纵向方向上延伸到叶片根部并且与变桨轴承(5)电隔离。 火花隙(15)设置在雷电引下线和转子毂之间,所述火花隙(15)适于传导通过雷电引下线的雷电流。 在雷电引下线(6)和转子毂(3)之间的火花间隙(15)平行设置滑动接触连接(7,12),所述滑动接触连接确保所述雷电引导线 6)和所述转子轮毂(3),而与叶片的桨距角无关。 本发明还涉及包括这种转子的风力涡轮机。