US 12,292,028 B2
Root assembly of a wind turbine blade for a wind turbine, wind turbine blade and wind turbine
Cole Campbell Pernitsky, Aalborg (DK)
Assigned to SIEMENS GAMESA RENEWABLE ENERGY A/S, Brande (DK)
Appl. No. 18/574,551
Filed by Siemens Gamesa Renewable Energy A/S, Brande (DK)
PCT Filed May 31, 2022, PCT No. PCT/EP2022/064786
§ 371(c)(1), (2) Date Dec. 27, 2023,
PCT Pub. No. WO2023/280476, PCT Pub. Date Jan. 12, 2023.
Claims priority of application No. 21183733 (EP), filed on Jul. 5, 2021.
Prior Publication US 2024/0318626 A1, Sep. 26, 2024
Int. Cl. F03D 1/06 (2006.01)
CPC F03D 1/0675 (2013.01) [F03D 1/0658 (2013.01); F05B 2260/30 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A root assembly of a wind turbine blade for a wind turbine, comprising:
(a) a root portion of the root assembly including a root segment;
(b) a root attachment face of the root portion attached to a bearing or a hub flange of the root assembly by multiple bolts;
(c) each of the multiple bolts is connected to one of multiple bushings fixedly arranged within the root segment such that the multiple bolts are arranged adjacent to each other along a circumference of the root portion, and the multiple bushings are arranged adjacent to each other along the circumference of the root portion, and
(d) adjacent bushings are offset from one another in a way such that the adjacent bushings are provided at an axial distance from one another, the axial distance being measured in an axial direction from the root attachment face to the multiple bushings and between centers of the adjacent bushings,
wherein a quotient between the axial distance and a bushing diameter of the multiple bushings is 2.5 or greater;
wherein the root segment has a first centerline located in a center of a thickness of the root segment measured along a radial direction of the root segment and extending along a circumferential direction of the root segment, the multiple bolts are arranged with centers along a second centerline extending along the circumferential direction of the root segment, and the second centerline is offset from the first centerline.