US 12,434,946 B2
Rotor blade hoisting system and method of installation and/or deinstallation of a rotor blade
Per Eske Fenger, Terndrup (DK)
Assigned to LIFTRA IP APS, Aalborg (SE)
Appl. No. 17/270,703
Filed by LIFTRA IP APS, Aalborg (DK)
PCT Filed Sep. 13, 2019, PCT No. PCT/EP2019/074494
§ 371(c)(1), (2) Date Feb. 23, 2021,
PCT Pub. No. WO2020/053389, PCT Pub. Date Mar. 19, 2020.
Claims priority of application No. PA 2018 70585 (DK), filed on Sep. 13, 2018.
Prior Publication US 2022/0348441 A1, Nov. 3, 2022
Int. Cl. B66C 1/10 (2006.01); F03D 13/10 (2016.01)
CPC B66C 1/108 (2013.01) [F03D 13/10 (2016.05)] 20 Claims
OG exemplary drawing
 
1. A rotor blade hoisting system for installation and/or deinstallation of a rotor blade on a hub of a wind turbine,
the rotor blade hoisting system including an upper cable support system configured to be mounted on a top end of the wind turbine,
a lower cable support system configured to be arranged at a lower end of the wind turbine at a distance from the wind turbine,
at least a left cable and a right cable both configured to be extended, in spaced relationship, from the lower cable support system to the upper cable support system,
a clamping system configured to be clamped onto a rotor blade of the wind turbine,
the clamping system including a left climbing system configured to climb on the left cable and a right climbing system configured to climb on the right cable, and
each of the left climbing system and the right climbing systems system including at least a first roller and a second roller configured to roll on the left cable and the right cable, respectively, and configured to, when the clamping system is clamped onto the rotor blade, be spaced in a longitudinal direction of the rotor blade so that the first rollers of the left climbing system and the right climbing system are placed nearer a root end of the rotor blade than the second rollers of the left climbing system and the right climbing system, respectively, wherein
at least one of the first roller and the second roller of each of the left climbing system and the right climbing system is a motor driven roller,
the clamping system includes a clamping yoke configured to be arranged at the position of the centre of gravity of the rotor blade, at least in the longitudinal direction of the rotor blade, and
the left climbing system and the right climbing system are configured to be mounted on the clamping yoke when the clamping system is clamped onto the rotor blade, and a position at least in the longitudinal direction of the rotor blade of the first roller of at least one of the left climbing system and the right climbing system is adjustable by means of an actuator.