Method for lowering and raising a wind turbine blade
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United States of America Patent
Stats
-
Nov 15, 2016
Grant Date -
Dec 11, 2014
app pub date -
Jun 5, 2014
filing date -
Jun 5, 2013
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method of lowering a wind turbine blade after removal from a wind turbine lowers the blade in a vertical position to a point near the ground, and rotates it to a horizontal position for emplacement on a cradle. A winch is situated in the nacelle of the wind turbine. A cable extends downward from the winch to the blade root where it may be secured to a load cell. A tip end shoe is placed around the lower portion of the blade, and includes a crane hook receiving component that is used when the blade orientation is being changed. Tag lines are attached to the root and the tip end shoe, and extend to points on the ground where technicians manipulate them to prevent the blade from being blown into the tower.
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