YAW REDUCTION DEVICE USED IN YAW DRIVE SYSTEM OF WIND-POWER GENERATION FACILITY AND THE YAW DRIVE SYSTEM

摘要

A yaw reduction device Gl used in a yaw drive system 14 of a wind-power generation facility 10 which drives a nacelle 12 to be turned by causing output pinions 24 of a plurality of the yaw reduction devices to mesh with a turning gear 28 on a main body side of the wind-power generation facility, includes: a hollow shaft 66 assembled in a power transmission system; and a shaft member (connection shaft 70) which is inserted into the hollow shaft, is connected to the hollow shaft in an inner periphery of the hollow shaft, and is connected to a different member at a position protruding from the hollow shaft, wherein the shaft member is connected to the hollow shaft to be closer to an opposite side to a side where the shaft member protrudes from the hollow shaft than a center in an axial direction of the hollow shaft.