| 摘要 |
A lifting system, for a wind turbine on an offshore site, comprises an elongate primary boom 106 pivotally mounted at its proximal end to a wind turbine tower base. At least two elongate secondary booms are pivotally mounted at their proximal ends. First and second flexible members (cables) 302, 306 connect the distal ends of each secondary boom to the primary boom, and third and fourth flexible members 301, 304 connect the distal ends of each secondary boom to a mount. First and second adjustable counterweights 112, 114 are connected to the distal ends of each secondary boom. A method of erecting a wind turbine using the lifting system comprises the primary boom being elevated, from a substantially horizontal position, to a substantially vertical position by adjusting the counterweights. The wind turbine is connected to a hoist on a distal end of the primary boom, and is hoisted to a desired position by adjusting the counterweights. The relative lengths of the flexible members may be adjusted by at least one winch to elevate and hoist the wind turbine. |
