US 12,064,933 B2
Wind turbine blade
Mikel Atutxa Briones, Bizkaia (ES); Pedro Jato Losfablos, Pamplona (ES); Jorge Lana Galdeano, Navarra (ES); Leyre Redin Larrea, Pamplona (ES); and Nicolas Rojo Saiz, Navarra (ES)
Assigned to Siemens Gamesa Renewable Energy Innovation & Technology S.L., Sarriguren (ES)
Appl. No. 17/640,948
Filed by Siemens Gamesa Renewable Energy Innovation & Technology S.L., Sarriguren (ES)
PCT Filed Sep. 11, 2020, PCT No. PCT/EP2020/075547
§ 371(c)(1), (2) Date Mar. 7, 2022,
PCT Pub. No. WO2021/048407, PCT Pub. Date Mar. 18, 2021.
Claims priority of application No. 19380020 (EP), filed on Sep. 13, 2019; and application No. 19380027 (EP), filed on Oct. 31, 2019.
Prior Publication US 2022/0333573 A1, Oct. 20, 2022
Int. Cl. B63H 1/26 (2006.01); B29D 99/00 (2010.01); F03D 1/06 (2006.01); B29C 70/30 (2006.01); B29L 31/08 (2006.01)
CPC B29D 99/0028 (2013.01) [F03D 1/0675 (2013.01); B29C 70/30 (2013.01); B29L 2031/085 (2013.01); F05B 2280/6003 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A wind turbine blade, with a generally hollow blade body comprising an upper and a lower half shell and a single first web and a second web each extending in a lengthwise direction of the blade and being disposed between and connected to the upper and the lower half shell, wherein the single first web is substantially centered in a maximum thickness point when viewed in a cross section of the wind turbine blade, with the second web being arranged closer to a trailing edge of the blade and extending only along a part of the trailing edge, with each web comprising an upper and a lower flange connecting the respective web to the respective half shell, and with the single first web and the second web being supported via respective first and second reinforcement structures relative to the respective half shell, which reinforcement structures extend in the lengthwise direction of the blade, wherein the first reinforcement structures supporting the single first web comprise at least three stacks composed of several pultruded composite strips comprising carbon fibers with the strips being fixed in a resin matrix, wherein the at least three stacks follow a bended shape of the respective half shell, and
wherein the second reinforcement structures supporting the second web are different than the first reinforcement structures supporting the single first web, and either
comprise at least one stack composed of separate glass and/or carbon fiber layers disposed between an outer and an inner layer of the respective upper and lower shell and infused together with the outer and inner layers with resin, wherein the respective flanges of the second web are attached to the inner layer of the respective upper and lower shell, and wherein the second reinforcement structures do not comprise any pultruded carbon fiber strips, or
comprise at least one stack composed of glass and/or carbon fiber layers infused with resin or of several pultruded composite strips comprising carbon fibers with the strips being fixed in a resin matrix, which stack is an integral part of the second web and builds the respective flange, wherein the second web is a prefabricated separate component, wherein the flanges of the second web are attached to the inner layer of the respective upper and lower shell.