In a general aspect, a method is presented for manufacturing support structures for offshore wind turbines. In some implementations, the method includes constructing a plurality of modular sections that assemble to define the support structure. One or more of the plurality of modular sections are configured to anchor to an underwater floor. At least one of the plurality of modular sections is constructed by operations that include forming a wall along a perimeter to bound a volume, filling the volume with a castable material, and hardening the castable material. In some instances, forming the wall includes depositing layers of printable material successively on top of each other. The method also includes joining the plurality of modular sections to assemble the support structure.

Methods for manufacturing an impeller wheel assembly (e.g., an impeller wheel attached to one or more additional components) are provided. In one example, a method includes casting an impeller wheel without a hub feature in a mold and holding the cast impeller wheel in a fixed position using a holding plate during subsequent stages of fabrication (e.g., the addition of a shaft via friction welding).

Provided is a method of manufacturing wind turbine rotor blades, wherein each rotor blade includes an inboard section and an outboard section, and wherein an inboard blade section including a root end and a transition region is manufactured using a first casting process; and an outboard blade section including an airfoil region is manufactured using a second casting process, which second casting process is different from the first casting process. The invention further describes a wind turbine rotor blade manufactured using such a method.

A rotor blade mold and a method for manufacturing a rotor blade for a wind energy installation, wherein the rotor blade includes a blade root and a blade tip and wherein the rotor blade extends in a longitudinal direction from the blade root to the blade tip. The mold includes a first rotor blade mold segment adapted for manufacturing a portion of the rotor blade that includes the blade root, a second rotor blade mold segment adapted for manufacturing a portion of the rotor blade that includes the blade tip, and at least a third rotor blade mold segment adapted to be integrated in the rotor blade mold between the first mold segment and the second mold segment, and/or to be removed from the rotor blade mold and thereby lengthen or shorten the rotor blade mold in the longitudinal direction.

A windmill blade includes a leading edge protector provided at a leading edge portion of a blade main body including a skin surrounding a hollow space. The leading edge protector is fixed to the skin from the inner side of the hollow space.

An electric pump may include a stack of diffusers including a first diffuser and a second diffuser. The first diffuser includes a recess therein defining an inner recess surface substantially circumscribing a primary diffuser axis. The second diffuser includes a lip projecting into the recess of the first diffuser. In response to a differential torque applied to the first and second diffusers about the primary diffuser axis, the lip of the second diffuser may engage the inner recess surface of the first diffuser, and thereby prevent relative rotation of the diffusers with respect to one another. An outer perimeter surface of the lip and the inner recess surface may define polygonal shapes or other non-circular profiles.

A runner for a hydraulic machine comprising a band, a crown, a plurality of blades extending between the crown and the band, wherein the runner comprises a plurality of runner segments which together define the runner, each runner segment comprising a band portion, a crown portion and a blade, which portions are integrally formed with one another, each runner segment being attachable to another segment at a band joining edge and a crown joining edge, wherein the band joining edge and the crown joining edge are each spaced apart from the blade of the segment.

A wind turbine blade is provided including at least one laminate structure, and at least one connection terminal element, wherein the laminate structure includes a panel core embedded between at least one first laminate layer and at least one second laminate layer, wherein the connection terminal element is arranged in a corresponding opening of the panel core between the first laminate layer and the second laminate layer, wherein the connection terminal element includes at least one first connection portion connected to an embedded electrical conductor embedded in the laminate structure and/or at least one second connection portion adapted to be connected to at least one further electrical conductor arranged outside of the laminate structure.

A runner for a hydraulic machine comprising a band, a crown, a plurality of blades extending between the crown and the band, wherein the runner comprises a plurality of runner segments which together define the runner, each runner segment comprising a band portion, a crown portion and a blade, which portions are integrally formed with one another, each runner segment being attachable to another segment at a band joining edge and a crown joining edge, wherein the band joining edge and the crown joining edge are each spaced apart from the blade of the segment.

In a general aspect, a method is presented for manufacturing support structures for offshore wind turbines. In some implementations, the method includes constructing a plurality of modular sections that assemble to define the support structure. One or more of the plurality of modular sections are configured to anchor to an underwater floor. At least one of the plurality of modular sections is constructed by operations that include forming a wall along a perimeter to bound a volume, filling the volume with a castable material, and hardening the castable material. In some instances, forming the wall includes depositing layers of printable material successively on top of each other. The method also includes joining the plurality of modular sections to assemble the support structure.