Method for hoisting and lowering device in rotor head of wind turbine generator

摘要

{Abstract} There is provided a method for hoisting and lowering a device in a rotor head of a wind turbine generator 1, that can easily perform a device hoisting and lowering operation in the rotor head 4 without an external crane. The method for hoisting and lowering a device in a rotor head includes a step of mounting a temporary winch rail 50 to a rail support portion 44. previously provided in the rotor head 4, a step of installing a temporary winch 51 on the temporary winch rail 50, a step of opening a maintenance hatch provided in the rotor head 4, and a step of hoisting and lowering a replacement device P to be attached or removed in the rotor head 4 through a hoisting and lowering opening 43 in the maintenance hatch by the temporary winch 51.