Lm Wp Patent Holding A/s

Lm Glasfiber A/s

Lm Wind Power A/s

Martin Dahl

Bjarne Krab Mortensen

Benjamin Hornblow

Morten Olesen

Peter Grabau

Lars Nielsen

Jesper Madsen

Carlos Arce

Michael Drachmann Haag

Ejnar Friis Hansen

Martin Fredskild

A wind turbine blade is described, as well as a trailing edge plate for a wind turbine blade. A flexible flow modulation device, e.g. an acoustic flap or a plurality of serrations, is arranged at the trailing edge of a wind turbine blade, wherein the flexible device is coupled to at least one aerodynamic device, preferably vortex generators. As the flexible device is bent by action of flow over the wind turbine blade, the at least one aerodynamic device is deployed to provide for attached flow over the bent flexible device.

Wind turbine blade having deployable aerodynamic devices

A wind turbine bladefor a rotor has a longitudinal direction extending from a root regionto a blade region. The wind turbine bladeis formed of a fibre-reinforced polymer material comprising a polymer matrix and a first and a second reinforcement fibre material being embedded in the polymer matrix. The wind turbine blade further comprises a first region being reinforced predominantly with the first reinforcement fibre material, a second region being reinforced predominantly with the second reinforcement fibre material, and a transition region between the first and the second region. The first region extends in the root regionand the first reinforcement fibre material is a metal.

Wind turbine blade comprising metal fibres and a transition region

A wind turbine blade for a wind turbine is a shell structure of a fibre-reinforced composite and comprises a root region and an airfoil region. The root region has ring-shaped cross section and comprises a plurality of elongated bushingswith an inner threadand embedded interspaced in the fibre-reinforced polymer so as to substantially follow the circumference of the root region and allow access from the outside to the inner threads. Each fastening memberis provided with a notchin the peripherythereof. A rod-shaped locking elementpasses through the notchin engagement therewith. The locking elementis fixedly and tightly fitting arranged in a through-going circular boreextending through the wall of the root region.

Wind turbine blade having a root region with elongated fastening members provided with metal fibres

A wind turbine blade for a wind turbine is a shell structure of a fiber-reinforced composite and comprises a root region and an airfoil region. The root region has a ring-shaped cross section and comprises a plurality of elongated bushingswith an inner threadand which are embedded interspaced in the fiber-reinforced polymer so as to substantially follow the circumference of the root region and allow access from the outside to the inner threads. The bushingsare formed conically tapering from a second end towards a first end thereof, the first end of the bushingbeing arranged at the end face of the root region.

Wind turbine blade with tapering root bushings

A wind turbine blade for a wind turbine is a shell structure of a fiber-reinforced composite and comprises a root region and an airfoil region. The root region has a ring-shaped cross section and comprises a cylindrical insertembedded in the fiber-reinforced polymer so as to substantially follow the circumference of the root region. The cylindrical insert is provided with a number of mutually spaced threaded boresin a first endthereof being accessible from the outside.

Wind turbine blade comprising cylindrical metal inserts in a root region thereof

A wind turbine blade () is formed of a fiber-reinforced composite material comprising a polymer matrix. The blade () further comprises a first region (), a second region () and a transition region () between the first and the second region (). The first region () is reinforced predominantly with a first reinforcement fiber material (). The second region () is reinforced predominantly with a second reinforcement fiber material (). The first and the second reinforcement fiber material differ from each other and has differing E-modulus. The transition region () additionally comprises a third type of reinforcement fiber material () differing from both the first and the second reinforcement fiber material () and having an E-modulus between that of the first reinforcement fiber material () and that of the second reinforcement fiber material ().

Wind turbine blade with transition region

A wind turbine bladecomprises a profiled contour including a leading edgeand a trailing edgeas well as a pressure side and a suction side. The profiled contour is formed by a first shell partand a second shell partbeing bonded together in a bonding region between the first and the second shell part by a curable bonding means. The first and the second shell partare formed in a fiber-reinforced polymer. The wind turbine blade further comprises resistive heating meansbeing arranged in thermal connection with the bonding meanssuch that the resistive heating meanssupplies heat for curing of the curable bonding meansduring assembling of the wind turbine blade.

Wind turbine blade comprising resistive heating means

Wind turbine blade has a longitudinal direction and includes a shell structure made of a fiber-reinforced polymer material including a polymer matrix and reinforcement material comprising a plurality of carbon fiber layers embedded in the polymer matrix. At least a portion of the shell structure is formed of a laminatecomprising at least one metal filament layercomprising metal filaments and being sandwiched between two carbon fiber layerscomprising carbon fibers only. The carbon fiber layers are arranged contiguously with the metal filament layer.

Wind turbine blade comprising metal filaments and carbon fibres and a method of manufacturing thereof

A repair solution for a wind turbine blade is described. The repair solution includes the application of a layer of viscous coating material to the section of the blade to be repaired, which is cured to form a repaired surface. The layer of viscous coating material may be temporarily covered during the curing process using a film of Low Surface Energy material, to prevent defects in the repaired surface from dust, insects, etc. Additionally or alternatively, a temporary shield may be erected adjacent the curing layer of coating material, to allow for the control of the temperature and/or humidity levels of the region adjacent the curing material, to provide for more effective control of the curing process and to allow for repairs to be carried out for a wider process window.

Wind turbine blade repair method

A method of manufacturing an aerodynamic shell part for a wind turbine blade is described. The aerodynamic she part comprises a recess for arrangement and connection of a spar cap within said recess. The method comprising the steps of: a) providing a first mold part having a first forming surface that defines a part of an exterior of the aerodynamic shell part, b) laying up fiber-reinforcement material and optionally also sandwich core material in the first mold on the first forming surface, c) arranging one or more inserts having an exterior shape corresponding to at least sides of the recess of the aerodynamic shell part, d) supplying resin to said fiber-reinforcement material and optional sandwich core material, e) curing or preconsolidating the resin, and f) removing the one or more inserts.

Method of manufacturing an aerodynamic shell part for a wind turbine blade

A wind turbine blade for a wind turbine is a shell structure of a fiber-reinforced composite and comprises a root region and an airfoil region. The root region has a ring-shaped cross section and comprises a plurality of elongated bushingswith an inner threadand embedded interspaced in the fiber-reinforced polymer so as to substantially follow the circumference of the root region and allow access from the outside to the inner threads. Each fastening memberis provided with a notch' in the peripherythereof. A rod-shaped locking elementpasses through the notch&#x2032; in engagement therewith. The locking elementis fixedly and tightly fitting arranged in a through-going circular boreextending through the wall of the root region.

Wind turbine blade with elongated fastening members in the root region thereof

A method of manufacturing a longitudinally extending composite structure including a shell part comprising a fiber reinforced polymer material including a polymer matrix and fiber material embedded in the polymer material is described. The shell part is manufactured in a closed mold comprising at least a first outer mold part having a first forming surface and a second outer mold part having a second forming surface. The method comprises the steps of: arranging a first fiber material in the first forming surface of the first outer mold part, arranging a pre-fabricated longitudinally extending reinforcement element, such as a beam or a web, on top of the first fiber material, arranging a second fiber material in the second forming surface of the second outer mold part, and sealing a polymer foil above the second fiber material so as to retain the second fiber material against the second forming surface.

Method of manufacturing a composite structure with prefabricated reinforcement element

A method of manufacturing an elongated composite structure having two separate longitudinal composite structure sections, where said method comprises the following steps: providing a rigid mold parthaving a first forming surfacewith a contour defining an outer surface of the elongated composite structure, arranging a first fiber lay-upin a first longitudinal sectionof the first mold part, arranging a first flexible foilover a first crosswise edge areaof the first fiber lay-up, arranging a second fiber lay-upin a second longitudinal sectionof the mold partso as to overlap the crosswise edge areaof the first lay-upand thereby the first flexible foilin an overlap areaforming an interface between the fiber lay-ups, providing polymer to the fiber lay-upsand allowing the polymer to cure.

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Flensburg, Germany

Martin Dahl