US 9,810,202 B2
Arrangement and method to rotate the hub of a wind turbine
Peter Loevenskjold Falkenberg, Herning (DK); Karl Aage Maj, Hammel (DK); Jacob Blach Nielsen, Engesvang (DK); Henning Poulsen, Skjern (DK); Brian Rasmussen, Give (DK); and Henrik Stiesdal, Odense C (DK)
Assigned to SIEMENS AKTIENGESELLSCHAFT, München (DE)
Filed by Peter Loevenskjold Falkenberg, Herning (DK); Karl Aage Maj, Hammel (DK); Jacob Blach Nielsen, Engesvang (DK); Henning Poulsen, Skjern (DK); Brian Rasmussen, Give (DK); and Henrik Stiesdal, Odense C (DK)
Filed on Apr. 3, 2013, as Appl. No. 13/855,839.
Claims priority of application No. 12163736 (EP), filed on Apr. 11, 2012.
Prior Publication US 2013/0272876 A1, Oct. 17, 2013
Int. Cl. F03D 1/00 (2006.01); F03D 1/06 (2006.01); F03D 11/00 (2006.01); F03D 80/00 (2016.01)
CPC F03D 11/00 (2013.01) [F03D 1/0658 (2013.01); F03D 80/00 (2016.05); F05B 2230/608 (2013.01); Y02E 10/721 (2013.01); Y02E 10/726 (2013.01); Y02P 70/523 (2015.11)] 8 Claims
OG exemplary drawing
 
1. A wind turbine, comprising:
a hub mounted to a nacelle, wherein the hub is rotatable with respect to the nacelle around an axis of rotation of the hub,
a first rotor blade arranged at the hub, wherein the first rotor blade leads to a torque around the axis of rotation of the hub,
a counter weight mounted to the hub by a lever that is rotatable with respect to the hub around the axis of rotation so that the lever and the counter weight are rotatable with respect to the hub into a predetermined position, wherein the lever is mounted at the axis of rotation of the hub; and
whereby the counter weight is adapted to provide a counter-torque around the axis of rotation of the hub, wherein the counter-torque reduces the torque of the first rotor blade.