WIND POWER GENERATION DEVICE

摘要

Provided is a wind power generation device (1) which enables drain oil to be reliably collected by improving oil supply and drain systems for lubricating oil used in a blade slewing ring bearing (10) of a windmill blade (5). The wind power generation device (1) is provided with a pitch control mechanism which enables the pitch angle of the windmill blade (5) to be adjusted via the blade slewing ring bearing (10) installed between the windmill blade (5) and a rotor head (4), wherein an oil supply/drain oil device (20) is provided in the rotor head (4), and the oil supply/drain oil device (20) is provided with an oil supply unit (30) for pumping and supplying the lubricating oil in an oil supply tank (31) to the blade slewing ring bearing (10) by an oil supply pump (32), and a drain oil unit (40) for collecting the drain oil by forcibly sucking the drain oil from the blade slewing ring bearing (10).