Siemens Gamesa Renewable Energy A/s

Siemens Aktiengesellschaft

Michael Noerlem

Donato Girolamo

Jens Jørgen Østergaard Kristensen

Mogens Nielsen

Claus Burchardt

Allan Hurup

Bendt Olesen

Wei Sun

Michael Nauheimer

Jens Joergen Ostergaard Kristensen

Jens Joergen Kristensen

Jens Jørgen ØStergaard Kristensen

A wind turbine blade for a wind turbine is provided, the wind turbine blade including: an electrical conductor for conducting lighting strikes towards a hub of the wind turbine, a fiber sock fully enclosing the electrical conductor when seen in cross-section, a support element, and at least one finger connecting the support element and the fiber sock, the fiber sock, the support element and the at least one finger being made of electrically conductive fibers for conducting lightning strikes from the support element to the electrical conductor. Such a fiber sock mitigates the risk of delamination around the electrical conductor resulting from injected high voltages in case of lightning strikes.

Wind turbine blade, a wind turbine and a method for manufacturing a wind turbine blade

A pultruded fibrous composite strip, a spar cap made from such strips, a wind turbine rotor blade having such a spar cap and a method for making a spar cap from such strips is provided. The strip is stacked with similar strips to form the spar cap. The strip has a substantially constant cross-section defined by first and second mutually opposed and longitudinally extending sides, and by first and second longitudinal edges. The first and the second sides include first and second abutment surfaces, respectively. The first and the second abutment surfaces are non-planar. When the strip is stacked with similar strips, and subsequently integrated within shell of the wind turbine blade, the non-planar profile of the strips at least partially obviates formation of resin rich pockets at the interface of the spar cap and the shell and/or stress concentration between the edges of the spar cap and the shell.

Pultruded fibrous composite strips having non-planar profiles cross-section for wind turbine blade spar caps

A pultruded fibrous composite strip, a spar cap made from such strips, a wind turbine rotor blade having such a spar cap and a method for making a spar cap from such strips are provided. The strip is stacked with similar strips to form the spar cap. The strip has a substantially constant cross-section defined by first and second mutually opposed and longitudinally extending sides, and by first and second longitudinal edges. The first and the second sides include first and second abutment surfaces, respectively. The first and/or the second abutment surfaces has corrugated profile such that a plurality of longitudinally extending grooves are defined on the abutment surface having the corrugated profile. When the strip is stacked with similar strips, and subsequently resin is infused, the grooves on the abutment surface having the corrugated profile facilitate transfer and flow of the resin into spaces between the stacked strips.

Pultruded fibrous composite strips having corrugated profiles for wind turbine blade spar caps

A method for manufacturing of a fiber reinforced laminate is provided. A part of the laminate is build up to a determined thickness. A layer of wrinkle-preventing material is placed on top of the partially completed laminate. The layer of wrinkle-preventing material has a greater stiffness than the stiffness of a layer of similar thickness of the uncured laminate. Further on a new part of the laminate is build up to a determined thickness. In case the thickness of the laminate built up is not as large as a desired thickness of the completed laminate, the placing of the layer and the building of a new part of laminate is repeated until the thickness of the laminate built up is equal to the desired thickness of the completed laminate.

Method for manufacturing of a fibre reinforced laminate, use of a wrinkle-preventing material, wind turbine blade and wind turbine

Growing community of inventors

Svenstrup, Denmark

Michael Noerlem