| 摘要 |
<p>A yaw drive (1) for a yawing system for a wind turbine, the yaw drive (1) comprising a motor (2), a gear assembly (3) operationally connected to the motor (2), and a torque limiter (5). The torque limiter (5) is arranged detachably between the motor (2) and the gear assembly (3), in such a manner that the torque limiter (5) is capable of transferring torque between the motor (2) and the gear assembly (3), and the torque limiter (5) being capable of limiting torque transfer between the motor (2) and the gear assembly (3) when the torque applied to the torque limiter (5) exceeds a threshold value. A torque transferring part of the torque limiter (5) comprises a first set of discs connected to a rotating output shaft of the motor (2) and a second set of discs connected to a rotating input shaft of the gear assembly (3), the discs (8) of the first set of discs being arranged interleaved with the discs (9) of the second set of discs, thereby forming a stack of discs. A friction between the discs (8) of the first set of discs and the discs (9) of the second set of discs provides torque transfer between the discs (8, 9). The discs (8, 9) are allowed to rotate relative to each other when an applied torque overcomes the friction between the discs (8, 9). The torque limiter (5) is provided with a preload mechanism, e.g. in the form of slotted disc springs (10), arranged to apply a preload force to the stack of discs in such a manner that the preload force defines the friction between the discs (8, 9).</p> |
