LOWERING AND RAISING A SINGLE WIND TURBINE ROTOR BLADE FROM SIX-O'CLOCK POSITION

摘要

An arrangement 200 and method for lowering and raising a single rotor blade 305 of a wind turbine 30 from a six-o'clock position is provided. Lifting fixtures 240, 245 are symmetrically attached on a rotor hub 235 at pitch bearing flanges for rotor blades 225, 230 about the rotor blade 305 being replaced. Lifting lines 270, 275 from coordinated ground winches 60 pass over the lifting fixtures 240, 245 to support the blade 220, attaching to a blade harness 300. The blade harness 300 attaches over a substantial length of the rotor blade 220, distributing the blade weight broadly. A tail pick crane 80 facilitates transfer of the rotor blade 220 between a vertical position and a horizontal position stored position.