US 11,988,188 B2
Rotor for a wind turbine, and method
Florian Rubner, Aurich (DE); and Torsten Jepsen, Aurich (DE)
Assigned to Wobben Properties GmbH, Aurich (DE)
Appl. No. 17/298,849
Filed by Wobben Properties GmbH, Aurich (DE)
PCT Filed Dec. 4, 2019, PCT No. PCT/EP2019/083593
§ 371(c)(1), (2) Date Jun. 1, 2021,
PCT Pub. No. WO2020/115092, PCT Pub. Date Jun. 11, 2020.
Claims priority of application No. 10 2018 130 895.7 (DE), filed on Dec. 4, 2018.
Prior Publication US 2022/0034292 A1, Feb. 3, 2022
Int. Cl. F03D 1/06 (2006.01)
CPC F03D 1/0658 (2013.01) [F05B 2230/604 (2013.01); F05B 2260/301 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A rotor for a wind turbine, comprising:
a rotor blade having a rotor blade body with a rotor blade wall having a face side, the rotor blade body extending to a blade tip, and
a hub having a blade-fastening element having first and second blind holes for receiving a respective longitudinal bolt for fastening the rotor blade to the blade-fastening element,
wherein the rotor blade has a fastening region which is tubular shaped and arranged at the face side,
wherein the rotor blade wall has a thickened portion with an outer circumferential surface and an inner circumferential surface at the fastening region of the rotor blade,
wherein a first passage opening extends through the thickened portion of the outer circumferential surface and a second passage opening extends through the thickened portion of the inner circumferential surface, wherein the first and second passage openings have first and second opposite ends, wherein the first end of each of the first and second passage openings is arranged on the face side of the rotor blade, and
wherein first and second longitudinal bolts are arranged in the first and second blind holes, respectively, and in the first and second passage openings, respectively, for fastening the rotor blade to the blade-fastening element;
wherein the fastening region has a tapering portion at a face side-averted side of the thickened portion;
wherein the tapering portion has a fastening cutout extending from a first end of the tapering portion facing toward the hub to a second end of the tapering portion facing away from the hub, wherein the fastening cutout includes a cutout opening at the second end of the tapering portion.