| 摘要 |
A wind turbine comprises wind turbine blades extending substantially radially from a hub on a main shaft having a substantially horizontal axis. The blades together with the hub form a rotor, which can be put into rotation by wind. The main shaft is rotatable mounted in a nacelle on top of a tower, and the nacelle may be rotated around a vertical axis in relation to the tower to adjust the rotor in relation to a prevailing wind direction. The wind turbine further comprises a yaw brake comprising a brake calliper and a brake disc or ring having a first side with a first surface and second side with a second surface, the yaw brake, when activated, acting as a rotation restriction of the nacelle in relation to the tower. The brake disc or ring is provided with one or more grooves formed in the first and/or second surfaces. |
