Patent ID: 8624413
Filing Date: 2014-01-07
Classification: F03D,F05B,F16H,Y02E,Y02P,Y10T

Abstract:
1. A rotor locking method for a power generating apparatus of renewable energy type comprising: a rotor including a blade, a hub on which the blade is mounted and a main shaft coupled to the hub; a hydraulic pump of variable displacement type driven by rotation of the rotor; a hydraulic motor driven by operating oil whose pressure is increased by the hydraulic pump; and a generator coupled to the hydraulic motor, the method comprising the steps of: decelerating the rotor by adjusting a pitch angle of the blade: after the decelerating step, stopping the rotor by applying a braking force by the hydraulic pump to the rotor; and locking the rotor so that the rotor is immovable in a rotation direction, wherein the power generating apparatus of renewable energy type further comprises: an encoder for detecting an angular position of the rotor; and a high pressure oil line for supplying the operating oil from the hydraulic pump to the hydraulic motor, and wherein, in the locking step, the rotor is stopped at a target angular position by adjusting at least one of a displacement of the hydraulic pump and a pressure of the operating oil in the high pressure oil line based on a detection result detected by the encoder.