A method for on-site repairing of a surface of a component in a wind turbine is provided. In the method, a digital model of the surface is generated using a scanning device. The digital model represents the surface in damaged state. Thereafter, using a processor, a repair scheme for the surface based on the digital model and on a desired state of the surface is generated. The desired state represents a post-repair state of the surface. Consequently, the repair scheme is provided to a 3D printing arrangement. Finally, in the method, one or more selected materials are printed, using the 3D printing arrangement, on the surface to be repaired, wherein the printing is performed according the repair scheme and results in repair of the damaged surface.

A method for assembling a shear web assembly of a wind turbine includes providing at least one spar cap. The method also includes forming a spar connecting member of a thermoplastic material via additive manufacturing. Further, the method includes securing the spar connecting member to the spar cap. Moreover, the method includes providing a shear web, forming a web connecting member of a thermoplastic material via additive manufacturing, and securing the web connecting member at a first end of the shear web. In addition, the method includes interconnecting the web connecting member and the spar connecting member at a joint. Thus, the method further includes heating the joint to secure the web connecting member and the spar connecting member together.

A prefabricated fairing for a wind turbine blade, the fairing extending along a fairing profile terminating at fairing lips and comprising exterior and interior fairing surfaces and a plurality of layers including fibre-reinforced layers and an exterior erosion-resistant elastomer layer forming a portion of the exterior fairing surface and being configured for defining the leading edge of the wind turbine blade, the fairing further comprises a cured first resin binding the erosion-resistant elastomer layer and the one or more fibre-reinforced layers together.

An electric compressor for compressing a gas, and in particular, an electric compressor for a motor vehicle comprising a compressor wheel, an electric motor, wherein the compressor wheel can be driven by the electric motor, a control unit, wherein the electric motor can be controlled by the control unit, and a housing having at least one open end for receiving the control unit. The housing has at least one recess on the inner circumference at the open end that is designed so as to be open in the direction of the housing interior. The control unit can be inserted into the housing in such a way that it closes the open end of the housing and the recess on the inner circumference.

Extracorporeal circuit devices can be used for on-pump open-heart surgery to support surgical procedures such as coronary artery bypass grafting. In some cases, a centrifugal pump is used as part of an extracorporeal circuit. Centrifugal pump heads are described herein that induce flow on two sides of an impeller plate, and that can be conveniently mechanically assembled.

A composite structure having a number of thermoset resin containing elements and a number of thermoplastic elements and at least one interface between the thermoset resin containing elements and the thermoplastic elements is provided. The thermoset resin containing elements and the thermoplastic elements have functional groups at the interface which bond to each other when the composite structure is cured and the functional groups are independently selected from amines, carboxylic acids, acid anhydrides, oxiranes, and derivatives thereof in their non-bonded condition. Additionally, a blade having such a composite structure is provided.

A wind power installation rotary connection, in particular a blade bearing or azimuth rotary connection, wherein the rotary connection is in the form of a plain bearing assembly, comprising an inner ring having a number of first plain bearing surfaces, an outer ring having a number of second plain bearing surfaces which are respectively associated with one of the first plain bearing surfaces as a plain bearing surface partner, and wherein the plain bearing assembly is in the form of a dry-running plain bearing assembly.

A lightning protection subsystem for a wind blade is presented. The lightning protection subsystem includes one or more conductive segments, where each of the one or more conductive segments include a conductor and a coupling portion, where the coupling portion is configured to secure the one or more conductive segments to an edge of the wind blade. Further, the one or more conductive segments form an elongated lightning conducting path along at least a portion of the length of the edge, at an outer surface of the wind blade.

A segmented rotor blade for a wind turbine includes a first rotor blade segment, a second rotor blade segment, at least one thermoplastic material, and an internal pressure source. The first rotor blade segment includes a first joint end. The second rotor blade segment includes a second joint end. The first and second joint ends are arranged together in an end-to-end orientation so as to form at least one scarf joint. The at least one thermoplastic material is arranged at each of the first and second joint ends. The first and second joint ends of the first and second rotor blade segments are bonded together via thermoplastic welding of the at least one thermoplastic material. The internal pressure source provides pressure to the scarf joint during the thermoplastic welding. The internal pressure source remains within the rotor blade after thermoplastic welding is complete.

The present disclosure is directed to a method of manufacturing a rotor blade for a wind turbine. The method includes providing a blade mold of the rotor blade. Another step includes placing an outer skin layer in the blade mold. The method also includes placing one or more structural inserts in the blade mold atop the outer skin layer as a function of a load of the rotor blade. Further, each of the structural inserts includes a plurality of cells arranged in a predetermined pattern. Further, the cells have varying cell sizes. The method also includes placing an inner skin layer atop the one or more structural inserts and securing the outer skin layer, the one or more structural inserts, and the inner skin layer together to form the rotor blade.