A water distributor for water to be injected into a combustion chamber of an internal combustion engine is provided with a housing that has a receiving chamber, wherein the receiving chamber extends in a longitudinal direction of the housing. An insertion element with an insertion section is provided and the insertion section is inserted into the receiving chamber and extends in the longitudinal direction in correspondence to the receiving chamber. A water inlet and at least one water outlet are provided. A distributor channel connects the water inlet in fluid communication to the at least one water outlet. The distributor channel is delimited at least partially by the insertion element. The housing and the insertion element are connected water-tightly to each other at an end face of the housing. The housing and the insertion element are made a plastic material.

Rotor blades and methods for joining blade components of rotor blades are provided. A method includes positioning an insert between and in contact with a first blade component and a second blade component. At least one of the first blade component or the second blade component includes a thermoplastic resin. The insert includes a thermoplastic resin and an energy absorptive pigment. The method further includes heating the thermoplastic resin of the at least one of the first blade component or the second blade component and the thermoplastic resin of the insert. The method further includes cooling the thermoplastic resin of the at least one of the first blade component or the second blade component and the thermoplastic resin of the insert. The heating step and the cooling step join the first blade component, the second blade component and the insert together.

A method forming a metallic structure having two or more portions is provided. The method can include providing a first layer of metal-forming material and then applying energy of a first power level to a first area of the first layer of metal-forming material to form a first portion of the metallic structure having a first density. Energy of a second power level can then be applied to a second area of the first layer of metal-forming material to form a second portion of the metallic structure having a second density. A second layer of the metal-forming material can be applied on top of the first portion and the second portion. The energy of the first power level can be applied to a first area of the second layer of metal-forming material and the energy of the second power level can be applied to a second area of the second layer to form the metallic structure.

A method of repairing or restoring an impeller seal tooth is provided. The method includes the step of inspecting each tooth of the impeller seal to determine what portions of the tooth requires repair. To repair the tooth, the worn portions may be removed via a pre-machining process to a base of the tooth, or other weldable surface of the tooth. The method further includes applying a weld to the weldable surface, via a pulsed laser beam welding process, to build up the weld into a substantially tapered shape corresponding to a shape of a restored seal tooth. After building the weld into the tapered shape, the method includes machining the tapered shaped into the restored seal tooth, and testing the restored seal tooth via a balance and speed testing.

Rotor blades and methods for joining blade components of rotor blades are provided. A method includes positioning an insert between and in contact with a first blade component and a second blade component. At least one of the first blade component or the second blade component includes a thermoplastic resin. The insert includes a thermoplastic resin and an energy absorptive pigment. The method further includes heating the thermoplastic resin of the at least one of the first blade component or the second blade component and the thermoplastic resin of the insert. The method further includes cooling the thermoplastic resin of the at least one of the first blade component or the second blade component and the thermoplastic resin of the insert. The heating step and the cooling step join the first blade component, the second blade component and the insert together.

In a first aspect, a method for joining a first composite element and a second composite element of a wind turbine blade is provided. The method comprises positioning one edge joining portion of the first composite element to face one edge joining portion of the second composite element. In addition, the method comprises plastic welding the one edge joining portion of the first composite element to the one edge joining portion of the second composite element. In a further aspect, a wind turbine blade comprising a first composite element joined to a second composite element according to any of the methods herein disclosed is provided.