| 摘要 |
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 pitc h 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 beari ng (5). A spark gap (15) is provided between the lightning down-conductor and t he 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 ensurin g 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. |
