Attaching the rotor (hub + three blades) to the generator during wind turbine construction involves special crane rigging that allows the assembly to be lifted and guided mid-air.
Throughout this process, which we call the rotor fly, the rotor pivots mid-air and is raised up and over the top of the tower, where it will then be aligned with the generator and bolted into place.
As you can see in this photo, one blade is behind the tower, on the opposite side of the generator, where the rotor will eventually attach. Getting it to the correct side is where special maneuvering comes into play – as the rotor is lifted above the whole structure, shifted forward, and lowered to the proper height. Taglines work with the crane and tower crew to align the rotor and control the load during the pick.
At this point, it’s ready to be “caught” or guided into place with the help of technicians up-tower, who will complete the bolting. The use of alignment pins also helps ensure the rotor is installed correctly and safely.
This carefully coordinated procedure marks the final step of wind turbine erection!
To make sure you don’t miss this upcoming feature, follow us on Twitter, Facebook, and Instagram!
