Abstract: The disclosure is directed to an apparatus, system and method for cleaning interior surfaces of storage containers such as tank trailers and other surfaces using a low volume of high pressure fluid. The apparatus of this disclosure includes one or more high pressure fluid conduits that can be extended and retracted within a storage container.

Abstract: A connection and fastening unit for components of a lightning protection system, the connection and fastening unit being realized for the purpose of being integrated in a wind turbine rotor blade and for being connected to the components of the lightning protection system, wherein the connection and fastening unit includes a cavity which can be closed in an airtight manner and in which a connector for connection to at least one of the components of the lightning protection system is arranged.

Abstract: The disclosure is directed to an apparatus, system and method for cleaning interior surfaces of storage containers such as tank trailers and other surfaces using a low volume of high pressure fluid. The apparatus of this disclosure includes one or more high pressure fluid conduits that can be extended and retracted within a storage container.

Abstract: The invention is directed to a method for making an equipotential bonding connection between two components of a lightning protection arrangement of a wind turbine rotor blade. The method includes providing a wind turbine rotor blade having two rotor blade half shells having respective connection and fastening units connected to corresponding ones of the two components of the lightning protection arrangement. A space is present in the interior of the rotor blade between the two connection and fastening units. A connection conductor is introduced from outside of the rotor blade through a through opening in one of the two connection and fastening units into the interior space of the wind turbine rotor blade. The two ends of the connection conductor are fastened to corresponding ones of the connection and fastening units such that the connection conductor bridges the interior space along an essentially linear imaginary line.

Abstract: Wind turbine rotor blade having an electric heating device for heating a heatable surface region which extends over a longitudinal section of the wind turbine rotor blade, wherein the electric heating device has a blade-tip-side end, a blade-root-side end and two profile-trailing-edge-side edges, and two outer electric conductors which are connected to the electric heating device along the profile-trailing-edge-side edges and via which the electric heating device can be supplied with a heating current, wherein at least one central electric conductor which is connected to the electric heating device at a distance from the two profile-trailing-edge-side edges in such a way that the electric heating device is divided by the at least one central electric conductor into at least two partial regions which each extend over the longitudinal section and can be supplied with an electric heating current separately from one another via two of the conductors.

Abstract: A spar cap assembly is for a wind turbine rotor blade. The spar cap assembly has a spar cap reinforced with carbon fibers, comprising a lightning conductor, which is arranged so as to run along the spar cap, and at least one potential-equalizing element, which establishes an electrical connection between the spar cap and the lightning conductor. The carbon fibers of the spar cap, the lightning conductor and the at least one potential-equalizing element are embedded in a common polymer matrix and are configured as a prefabricated assembly for integration into a wind turbine rotor blade half-shell after the curing of the polymer matrix.

Abstract: A connection and fastening unit for components of a lightning protection system, the connection and fastening unit being realized for the purpose of being integrated in a wind turbine rotor blade and for being connected to the components of the lightning protection system, wherein the connection and fastening unit includes a cavity which can be closed in an airtight manner and in which a connector for connection to at least one of the components of the lightning protection system are arranged.

Abstract: The invention is directed to a method for making an equipotential bonding connection between two components of a lightning protection arrangement of a wind turbine rotor blade. The method includes providing a wind turbine rotor blade having two rotor blade half shells having respective connection and fastening units connected to corresponding ones of the two components of the lightning protection arrangement. A space is present in the interior of the rotor blade between the two connection and fastening units. A connection conductor is introduced from outside of the rotor blade through a through opening in one of the two connection and fastening units into the interior space of the wind turbine rotor blade. The two ends of the connection conductor are fastened to corresponding ones of the connection and fastening units such that the connection conductor bridges the interior space along an essentially linear imaginary line.

Abstract: A spar cap assembly for a wind turbine rotor blade with a carbon fiber-reinforced spar cap, a lightning conductor, which extends along the spar cap, and an equipotential bonding element, which connects the spar cap and the lightning conductor together electrically conductively, wherein the spar cap includes a plurality of layers of pultruded semi-finished products and the equipotential bonding element comprises a sheet of a carbon fiber material, which rests against an end face of an end on the blade root side of one of the pultruded semi-finished products and against an end face of an end on the blade tip side of one of the pultruded semi-finished products.

Abstract: A wind turbine rotor blade includes: a rotor blade root; a rotor blade tip; an electrical heating device; a first lightning receptor disposed in the region of the rotor blade tip; precisely two lightning conductors leading from the lightning receptor to the rotor blade root; a second lightning receptor arranged at a distance to the rotor blade tip and connected to one of the lightning conductors; and, each one of the two lightning conductors being electrically conductively connected to the electrical heating device at a multiplicity of points between the rotor blade root and the rotor blade tip so as to cause equipotential bonding between the two lightning conductors via the electrical heating device in response to a lightning strike to the rotor blade.

Abstract: Wind turbine rotor blade having an electric heating device for heating a heatable surface region which extends over a longitudinal section of the wind turbine rotor blade, wherein the electric heating device has a blade-tip-side end, a blade-root-side end and two profile-trailing-edge-side edges, and two outer electric conductors which are connected to the electric heating device along the profile-trailing-edge-side edges and via which the electric heating device can be supplied with a heating current, wherein at least one central electric conductor which is connected to the electric heating device at a distance from the two profile-profiling-edge-side edges in such a way that the electric heating device is divided by the at least one central electric conductor into at least two partial regions which each extend over the longitudinal section and can be supplied with an electric heating current separately from one another via two of the conductors.

Abstract: The invention relates to a method and a device for modifying in a spatially periodic manner at least in some regions a surface of a substrate (24), said surface being disposed on a sample plane (P) for which end different regions (211, 221, 231, 232) of the substrate surface are acted upon successively with a spatially periodic illumination pattern of an energy density above a processing threshold of the substrate surface, where the illumination pattern is generated by diffraction of an input beam (10) and superimposition of resulting, diffracted sub-beams (12, 14) by means of a grid interferometer (100), and where, in order to select the substrate surface region to be illuminated in each case (211, 221, 231, 232), the input beam (10) is deviated by means of a beam-deviating unit (16) arranged upstream of the grid interferometer (100).

Abstract: A spar cap assembly is for a wind turbine rotor blade. The spar cap assembly has a spar cap reinforced with carbon fibers, comprising a lightning conductor, which is arranged so as to run along the spar cap, and at least one potential-equalizing element, which establishes an electrical connection between the spar cap and the lightning conductor. The carbon fibers of the spar cap, the lightning conductor and the at least one potential-equalizing element are embedded in a common polymer matrix and are configured as a prefabricated assembly for integration into a wind turbine rotor blade half-shell after the curing of the polymer matrix.

Abstract: A wind turbine rotor blade includes: a rotor blade root; a rotor blade tip; an electrical heating device; a first lightning receptor disposed in the region of the rotor blade tip; precisely two lightning conductors leading from the lightning receptor to the rotor blade root; a second lightning receptor arranged at a distance to the rotor blade tip and connected to one of the lightning conductors; and, each one of the two lightning conductors being electrically conductively connected to the electrical heating device at a multiplicity of points between the rotor blade root and the rotor blade tip so as to cause equipotential bonding between the two lightning conductors via the electrical heating device in response to a lightning strike to the rotor blade.

Abstract: Rotor blade or rotor blade segment for a wind turbine, having at least one cable for fixing the rotor blade or rotor blade segment to a rotor hub or to a further rotor blade segment, wherein the at least one cable is redirected in a U-shaped manner within the rotor blade or rotor blade segment.

Abstract: The invention relates to a method and a device for modifying in a spatially periodic manner at least in some regions a surface of a substrate (24), said surface being disposed on a sample plane (P) for which end different regions (211, 221, 231, 232) of the substrate surface are acted upon successively with a spatially periodic illumination pattern of an energy density above a processing threshold of the substrate surface, where the illumination pattern is generated by diffraction of an input beam (10) and superimposition of resulting, diffracted sub-beams (12, 14) by means of a grid interferometer (100), and where, in order to select the substrate surface region to be illuminated in each case (211, 221, 231, 232), the input beam (10) is deviated by means of a beam-deviating unit (16) arranged upstream of the grid interferometer (100).

Abstract: A rotor blade or rotor blade segment for a wind turbine has at least one cable for the fixation of the rotor blade or rotor blade segment on a rotor hub or on the further rotor blade segment. A connecting surface, in the mounted state, faces the rotor hub or further rotor blade segment and from this connecting surface, a free end of the at least one cable protrudes for fixation on the rotor hub or further rotor blade segment. The at least one cable is anchored inside a connecting region of the rotor blade or rotor blade segment and extends only over a longitudinal section of the rotor blade or rotor blade segment which adjoins the connecting surface.

Abstract: Rotor blade or rotor blade segment for a wind turbine, having at least one cable for fixing the rotor blade or rotor blade segment to a rotor hub or to a further rotor blade segment, characterized in that the at least one cable is redirected in a U-shaped manner within the rotor blade or rotor blade segment.