US 12,215,000 B2
Method and yoke for lifting a wind turbine component
Per E. Fenger, Terndrup (DK); and Alexander Becsei Christiansen, Hjørring (DK)
Assigned to LIFTRA IP APS, Aalborg (DK)
Appl. No. 17/777,782
Filed by LIFTRA IP APS, Aalborg SV (DK)
PCT Filed Jun. 18, 2020, PCT No. PCT/DK2020/050176
§ 371(c)(1), (2) Date May 18, 2022,
PCT Pub. No. WO2020/259771, PCT Pub. Date Dec. 30, 2020.
Claims priority of application No. PA201970397 (DK), filed on Jun. 24, 2019.
Prior Publication US 2023/0079878 A1, Mar. 16, 2023
Int. Cl. B66C 13/46 (2006.01); B66C 1/10 (2006.01); B66C 1/42 (2006.01); B66C 1/62 (2006.01); F03D 13/10 (2016.01)
CPC B66C 13/46 (2013.01) [B66C 1/108 (2013.01); B66C 1/42 (2013.01); B66C 1/62 (2013.01); F03D 13/10 (2016.05); F05B 2230/61 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A wind turbine rotor blade lifting yoke for lifting a wind turbine rotor blade, the lifting yoke comprising:
a first structural body comprising a crane hook connection point configured to attach to a hook of a crane,
a second structural body located at a distance from the first structural body,
a first tensional element connecting a first connection point of the first structural body and a third connection point of the second structural body,
a second tensional element connecting a second connection point of the first structural body and a fourth connection point of the second structural body, and wherein a length of the second tensional element is variable, such that an angle between the first and second structural bodies can be changed by changing the length of the second tensional element,
an inertial measurement unit positioned on the second structural body, wherein the inertial measurement unit measures the angle of rotation of the second structural body about at least one axis with respect to a horizontal and/or vertical direction,
a first sensor, which measures information for calculating the length of the second tensional element,
a second sensor for measuring information for calculating an angle of the second tensional element with respect to the second structural body,
a control system receiving measurements from the sensors and calculating a center of gravity of the wind turbine rotor blade.