A SLIDING YAW BEARING WITH A ROTOR LOAD DEPENDENT ROTARY STIFFNESS

摘要

A wind-speed dependent yaw damper for regulating the rotation of a nacelle of a wind turbine relative to a tower of said turbine comprising: - a first ring array (130) comprising two or more concentrically arranged rings (132), (134) arranged around a central (A-A') axis configured for attachment to the base of the nacelle (110), whereby each ring is flanked on one or both radial sides by an annular seating space (136), (138), - a second ring array (140) comprising two or more concentrically arranged rings (142), (144) arranged around a central (A-A') axis configured for attachment to the top of the tower 120 whereby each ring is flanked on one or both radial sides by an annular seating space (146), (148), wherein the two or more rings (132), (134) of the first array (130) are arranged to intercalate in the annular seating spaces (146, 148) in the second array (140) and vice versa, thereby revolutely coupling the first and second arrays around an axis of rotation (A-A'), such that the application of a force to the nacelle (110) divergent from the central axis of the first ring array (130) is transmitted through the rings,thereby increasing friction between the rings and regulating the torque required to rotate the nacelle relative to the tower.