Crane vessel for hoisting of an offshore wind turbine or component thereof

    公开(公告)号:US12187585B2

    公开(公告)日:2025-01-07

    申请号:US17909665

    申请日:2021-03-05

    Applicant: ITREC B.V.

    Abstract: A crane vessel for hoisting of an offshore wind turbine or a component thereof, includes a hull having a deck. A crane configured for hoisting of an offshore wind turbine or a component thereof includes a vertical crane structure having a crane structure base fixed to the hull, the crane structure extending from the hull over a height thereof to a top along a vertical axis of the crane structure, a boom, and a slew bearing allowing to revolve the boom, about a slew axis. A main hoisting system includes at least one main hoisting winch, an associated main hoisting cable and a load connector, the main hoisting cable extending from the main hoisting winch to a main hoist cable guide on the boom and then to the load connector. The crane further includes a dynamic behaviour adjustment system that is configured to adjust the dynamic behaviour of the vessel by moving and/or arranging an adjustment mass that is distinct from the offshore wind turbine or component thereof into or in at least one dynamic behaviour adjustment position along the height of the vertical crane structure.

    Method of mounting a self-hoisting crane on a wind turbine and self-hoisting crane

    公开(公告)号:US11932520B2

    公开(公告)日:2024-03-19

    申请号:US17600632

    申请日:2020-03-31

    Applicant: Liftra IP ApS

    Inventor: Per Eske Fenger

    CPC classification number: B66C23/207 B66C23/185 F03D13/10 F05B2230/61

    Abstract: The crane is hoisted from the ground to the nacelle by operating a cable winch at ground whereby a cable extends from the crane to a roller at the nacelle and to the cable winch. A hoist block with the roller is arranged on a jib at a first hoist block position above a second hinge part of a crane base and extended in horizontal direction from the nacelle. When a first hinge part of the crane is positioned at a corresponding second hinge part of the crane base, the cable extends in a downward direction directly from the roller of the hoist block and through a central opening in a pedestal. After mutual connection of the first and second hinge parts, the hoist block is removed from its first hoist block position.

    Nacelle mountable lift system for a wind turbine

    公开(公告)号:US11866306B2

    公开(公告)日:2024-01-09

    申请号:US17831596

    申请日:2022-06-03

    CPC classification number: B66C23/185 B66C1/108 F03D13/10 F03D80/50 F05B2230/61

    Abstract: A lift system mountable in a nacelle of a wind turbine has a boom having a proximal end mountable in the nacelle and a distal end extending over a hub of a rotor of the wind turbine when the lift system is mounted in the nacelle. The lift system has a frame structure for mounting the proximal end of the boom in the nacelle, a winch mounted to the boom, a fastener situated below the boom and operatively connected to the winch by at least one cable, and a trolley movably mounted to the boom to permit translation of the trolley longitudinally along the boom thereby permitting longitudinal movement of the fastener with respect to the boom.

    Cranes and methods for erecting a tower

    公开(公告)号:US11795038B2

    公开(公告)日:2023-10-24

    申请号:US17102498

    申请日:2020-11-24

    CPC classification number: B66C23/207 B66C23/32 B66C23/185 B66C23/305 B66C23/72

    Abstract: The disclosure relates to a crane (200) for erecting a tower including a plurality of tower segments (171, 72, 173, 174, 175), the crane (200) comprising: a telescopic mast (210), and a jib (230) rotatably mounted with respect to the telescopic mast (210) and comprising lifting equipment (240). The telescopic mast (210) comprises a lower mast segment (211) having one or more lower clamp assemblies (202, 204) for selectively gripping portions of the tower and a roller assembly (300) for rolling along the tower, and comprising one or more further mast segments (212, 213, 214, 215, 216) having an upper clamp assembly (206) for selectively gripping portions of the tower, the further mast segments (212, 213, 214, 215, 216) being slidable with respect to the lower mast segment (211). The disclosure also relates to methods for climbing a tower with a crane (200) and methods for mounting a wind turbine tower.

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