| 摘要 |
A yawing system for a wind turbine, the wind turbine comprising a tower fixed to the ground and a frame ( 1 ) housing an electric power generator, the tower and the frame ( 1 ) being joined by the yawing system which allows the orientation of the frame ( 1 ) with respect to the tower according to the direction of the wind. The yawing system comprises: a gear ring ( 2 ) fixed to the tower, the gear ring having a sliding track ( 3 ) on which the frame ( 1 ) rests and slides in its yawing movement, at least one geared motor fixed to the frame ( 1 ), meshed with the gear ring ( 2 ) through a gear wheel, at least one active braking module ( 5 ), and at least one passive braking module ( 6 ). The invention further comprises a sliding track ( 3 ) and a friction track on the gear ring, this friction track ( 10 ) being different from the sliding track ( 3 ), and the active braking modules ( 5 ) and passive braking modules ( 6 ) comprising a friction plate ( 11 ) acting on the friction track ( 10 ) of the ring. The frame ( 1 ) rests on the gear ring ( 2 ) by means of horizontal plates ( 8 ) and radial plates ( 9 ) made of a sliding material, and are kept in their position by separating parts ( 7 ). Furthermore, the gear ring ( 2 ) is divided into gear-toothed circular segments to favor its repair. Other aspects are a wind turbine with the previous yawing system and a yawing process of a turbine by means of the previous yawing system.
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