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US 12,104,578 B2Granted
Main shaft fixture
AssigneeLiftra IP Aps
InventorPer E. Fenger
Life of this patent
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AssigneeLiftra IP Aps
InventorPer E. Fenger
Estimating the term…
A main shaft fixture for fixing a main shaft on a wind turbine during installation and repair work on heavy parts of the wind turbine nacelle, in the case where the fixture is formed of several sections for mounting on stable structural parts in the nacelle, including the nacelle's bottom frame. The main shaft fixture has adjustable pressure mandrels with tap shoes, which cause the fixture to be usable regardless of the turbine main shaft geometry, such that it can be mounted without fixing the rotor. The main shaft fixture also has facilities for mounting of a lightweight crane and a self-hoisting crane with a ground-based winch, respectively, as well as a rotor lock which, in combination with actuators of the main shaft fixture, enables the main shaft and the main shaft bearing to be sufficiently displaced vertically from its bearing in the nacelle to service or replace the bearing.
Main shaft fixture for fixation of a main shaft on a wind turbine during execution of installation and repair work on heavy parts of a wind turbine, where the fixture is divided up into a number of sections for mounting on stable structural parts in a nacelle of a wind turbine, including a bottom frame of the nacelle, characterised in that the main shaft fixture comprises adjustable pressure mandrels with tap shoes, and the adjustable pressure mandrels being displaceable between a passive position where the tap shoes are configured to be located at a distance from a surface of the main shaft and an active position where the tap shoes are configured to be engaged with the main shaft and in that the main shaft fixture further comprises mounting facilities adapted for anchoring a crane on/in a nacelle of a wind turbine.
Main shaft fixture for fixation of a main shaft on a wind turbine during execution of installation and repair work on heavy parts of a wind turbine, where the main shaft fixture is divided up into a number of sections for mounting on stable structural parts in a nacelle of a wind turbine, including a bottom frame of the nacelle, characterised in that,
Main shaft fixture for fixation of a main shaft on a wind turbine during execution of installation and repair work on heavy parts of a wind turbine, where the main shaft fixture is divided up into a number of sections for mounting on stable structural parts in a nacelle of a wind turbine, including a bottom frame of the nacelle, characterised in, that the main shaft fixture comprises adjustable pressure mandrels with tap shoes, and the adjustable pressure mandrels being displaceable between a passive position where the tap shoes are configured to be located at a distance from a surface of the main shaft and an active position where the tap shoes are configured to be engaged with the main shaft and in that the main shaft fixture further comprises mounting facilities adapted for anchoring a crane on/in a nacelle of a wind turbine, and further comprising a rotor lock for fixation of a rotor of the wind turbine, wherein the rotor lock consists of a flange element, whose bolt circle geometry corresponds to a bolt circle geometry on the rotor, the flange element being fastened to a first end of two first beam-shaped brackets extending parallel with, and on each side of the main shaft, the two first beam shaped brackets belonging to the main shaft fixture, and where a second end of the two first beam shaped brackets are pivotally mounted with horizontally oriented bolt connections, on other brackets belonging to the main shaft fixture, which are adapted to be anchored on the bottom frame of the nacelle.
Dependencies are inferred from the claim text.