US 12,221,950 B2
Blade apparatus for wind power generation and wind power generation device
Jie Hu, Beijing (CN); Jiaotong Jin, Beijing (CN); and Xin Cao, Beijing (CN)
Assigned to Sany Renewable Energy Co., Ltd., Beijing (CN)
Filed by Sany Renewable Energy Co., Ltd., Beijing (CN)
Filed on Jan. 6, 2023, as Appl. No. 18/150,989.
Claims priority of application No. 202210918264.X (CN), filed on Aug. 1, 2022.
Prior Publication US 2024/0035439 A1, Feb. 1, 2024
Int. Cl. F03D 1/06 (2006.01); H02K 7/18 (2006.01)
CPC F03D 1/0658 (2013.01) [F03D 1/0675 (2013.01); H02K 7/183 (2013.01); F05B 2220/706 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A blade apparatus for wind power generation, comprising:
a blade body, one end of the blade body being provided with a blade-root connecting portion, wherein a cross section of each blade root segment has an arc structure; in an axial direction of the blade root assembly, one end of each blade root segment is provided with a first connection structure matched with the blade-root connecting portion, and the other end of each blade root segment is provided with a second connection structure matched with a hub of a wind power generation device;
a blade root assembly, comprising a plurality of blade root segments, the plurality of blade root segments being arranged in a circumferential direction of the blade body to form a body of revolution, and each blade root segment being detachably connected to a corresponding portion of the blade-root connecting portion, wherein a plurality of bolt connecting holes are provided on an end face of the blade-root connecting portion, and the plurality of the bolt connecting holes are arranged at intervals in a circumferential direction; and the first connection structure comprises a plurality of first bolt holes and a plurality of first studs; the plurality of the first bolt holes are arranged at intervals in the circumferential direction, and arranged opposite to the plurality of bolt connecting holes; one end of each first stud is in threaded connection with corresponding one of the plurality of bolt connecting holes, and the other end of each first stud is in threaded connection with corresponding one of the plurality of first bolt holes; and
a first flange ring, arranged between the blade root assembly and the blade body, wherein the first flange ring being provided with a plurality of first through holes extending in an axial direction, the plurality of first through holes being arranged at intervals in the circumferential direction, the plurality of first studs respectively passing through the plurality of first through holes and being connected to the blade root assembly and the blade body.