Abstract: A method of examining a fuel cell by means of a cyclic voltammetry analysis, wherein the cyclic voltammetry analysis is used to ascertain a gas composition in the fuel cell. The fuel cell has a first gas space for a first reactant and a second gas space for a second reactant, where no reactant is supplied at least to one of the two gas spaces, especially to either gas space, during the cyclic voltammetry analysis. The cyclic voltammetry analysis is used to ascertain a concentration of hydrogen in the gas spaces.

Abstract: A seal for sealing a gap in a combustion arrangement of a gas turbine. The seal is formed by a L-shaped angle profile and a clamping profile. Both profiles have on the opposite side an engagement flank for fastening in a sealing groove and a sealing flank bearing against one another. The clamping profile further includes a holding portion, which is located opposite the associated sealing flank and also bears against the sealing flank of the angle profile, and a clamping portion connecting the sealing flank to the holding portion.

Abstract: A power supply system for a water-bound device and to an operating method, the water-bound device having an electric shaft and in particular a first zone and a second zone, the system includes: a first DC voltage bus for a first DC voltage and a second DC voltage bus for a second DC voltage; a first energy source and a second energy source, the first energy source being provided in the first zone for supplying at least one DC voltage bus of the at least two DC voltage buses, and the second energy source being provided in the second zone for supplying at least one DC voltage bus of the at least two DC voltage buses, the energy supply system being structured at least partially in a zone-dependent manner.

Abstract: An electric plug-in device, which is suitable for plugging into an electric receiving device, has an inner conductor and an insulating body which encloses the inner conductor. The plug-in device has: a main element, which can be fixed indirectly, in particular with the involvement of a housing wall, or directly to the receiving device and which encloses the inner conductor and insulating body; a pusher element, which can be displaced relative to the main element; and a spring device, which, after the plug-in device has been plugged into the receiving device, exerts an axial spring force on the pusher element in the direction towards the receiving device.

Abstract: A metal composition, a method for additive manufacturing using such metal composition and the use of such metal composition is provided. The components of the metal composition are selected according to ranges and typically provide a more generic applicability in additive manufacturing.

Abstract: A high temperature flange joint in a gas turbine engine includes a first flange formed on a first component abutting a second flange formed on a second component. The flange joint includes multiple adjacently spaced bolt connections. Each bolt connection includes a first spacer plate bearing against the first flange and a second spacer plate bearing against the second flange. First and second lock washers are provided that bear against the first and second spacer plates respectively. A bolt is inserted through the first and second flanges, the first and second spacer plates and the first and second lock washers. The bolt is preloaded to clamp the first flange to the second flange. Each spacer plate has a respective thickness and is sized to enhance a bearing surface in contact with the respective flange. Thereby, a bolt preload is maintained during operation of the gas turbine engine.

Abstract: A method of disassembling a rotor module of a gas turbine engine. The gas turbine engine having a rotor output shaft. The rotor module having a centre-bolt, a sleeve, at least one rotor stage, at least one stator stage, a casing and an axis. The method having the steps: attaching a fixture to the at least one rotor stage, attaching the fixture to the casing, detaching the centre-bolt from the at least one rotor stage, detaching the sleeve from the output shaft, attaching the fixture to the sleeve, and removing the rotor module and fixture from the rotor output shaft. There is also presented a method of assembling the rotor module to the gas turbine engine and the apparatus used for disassembly and assembly.

Abstract: A magneto-optic current transformer for measuring a current intensity of an electric current in an electrical conductor includes two light-guide units, each with an input polarizer, an output polarizer and a light guide arranged between the input and the output polarizer. A light-supply device is included which is configured to supply light to the light-guide units on the input side, and an analysis device which is configured to measure a luminous intensity of light output by the light-guide unit at the output side for each light-guide unit and to ascertain the current intensity of the electric current through the electrical conductor from the measured luminous intensities. A polarization axis of the output polarizer of each light-guide unit is rotated through a polarization angle in relation to a polarization axis of the input polarizer of the light-guide unit and the polarization angles of the two light-guide units differ from one another.

Abstract: A method for providing manufacturing instructions for the powder-bed-based additive manufacturing of a component includes providing first irradiation vectors for a layer to be additively manufactured, which first irradiation vectors, upon appropriate irradiation by an energy beam, in particular a laser beam or electron beam, cause a porous structure of the layer, as well as providing the first irradiation vectors for a layer which is to be additively manufactured and which follows the layer, in such a way that paths of a porous structure of the layer and of the following layer at least partially overlap in order to allow for a flow through the manufactured component along a build-up direction.

Abstract: A current transformer includes a head tank and a head tank cover, both of an electrically conductive material, a primary winding for conducting a current to be measured. The primary winding has a primary bar, and a secondary winding is wound around the primary bar. The primary and secondary windings are arranged within a cavity defined within the head tank and cover. An upper flange of the head tank is configured for fluid tightly sealing against a cover flange of the head tank cover. The head tank and cover respectively have a primary terminal for electrically contacting the primary winding. One or more connection points are within the head tank and cover, respectively, to electrically connect a respective end of the primary winding to the head tank or to the cover, wherein an electrically insulating ring is arranged between the cover flange and the upper flange.

Abstract: An electrical energy distribution system for a vessel or platform includes a plurality of DC buses, each DC bus coupled to a corresponding energy storage bus; each energy storage bus being coupled to a neighboring energy storage bus of the system through a first DC/DC converter. The plurality of energy storage buses are connected together to form a ring. Each energy storage bus is further coupled to an energy store through a second DC/DC converter.

Abstract: Various embodiments include a method for producing a ceramic insulator for a high-voltage or medium-voltage switching system comprising: attaching a base material for an equipotential layer between two axially symmetrical ceramic structural elements; disposing the electrically conductive equipotential layer between the two ceramic structural elements; and joining the two ceramic structural elements to form a unitary body along a symmetry axis of a first of the two elements.

Abstract: A method for producing a vibration-damping structure combination for damping vibrations for movable masses, having a first structure and a further structure, the further structure movable within a stop surface defined by a first structure surface of the first structure. The method includes a) providing the first structure, having the first structure surface and which defines a coating surface of a coating at least in some sections; b) coating the first structure surface of the first structure with the coating, the coating surface of the coating being applied such that a cavity is formed; c) filling the cavity with the filler; d) curing the filler until the further structure having a further structure surface is formed, which lies against the coating surface; and e) removing the coating, the further structure thus being movable relative to the first structure within the stop surface defined by the first structure surface.

Abstract: A current interrupter system has a series arrangement of at least two interrupter units. At least one of the interrupter units is a vacuum tube, and the at least two interrupter units are mechanically connected to a drive system. The drive system has a drive assembly and a drive shaft. The drive shaft is a crank shaft equipped with at least two cranks. The at least two cranks have two crank strokes of different magnitudes.

Abstract: A turbine blade includes a root arranged to attach the turbine blade to a rotor and a vane extending in a radial direction from the root to a tip surface. The vane includes a leading edge, a trailing edge, a pressure-side surface, and a suction-side surface that cooperate to define a vane perimeter. A perimeter wall extends radially from the tip surface and surrounds a portion of the vane perimeter. A first trench wall extends across the tip surface and cooperates with the perimeter wall to substantially enclose a pressure-side pocket and a second trench wall extends across the tip surface and cooperates with the perimeter wall to substantially enclose a suction-side pocket.

Abstract: A molding tool (10) for manufacturing cooling features in a ceramic core for a casting process includes a first mold portion (12) comprising a crossover hole forming feature (18); a second mold portion (24) comprising an impingement jet receiving forming feature (30) for forming an impingement jet receiving feature having a desired aiming point (32); and a sacrificial alignment member (34) for extending at least partially into the crossover hole forming feature (18) at least partially into the aiming point (32) of the impingement jet receiving forming feature (30) for substantially aligning a central axis (38) of the crossover hole forming feature (18) with the aiming point (32) to maintain a crossover hole and aiming point alignment during casting to ensure that the jet is directed at the aiming point (32) in a resultant cast part.

Abstract: A microlens arrangement and to a micro-optical device having a microlens arrangement. The microlens arrangement includes a microlens and a lens holder for the microlens, wherein the lens holder has a holding tube that has a tube slot, and the microlens is arranged within the holding tube.

Abstract: An optical waveguide for a magneto-optical current sensor. The optical waveguide includes a first end surface, through which light can be coupled into the optical waveguide, and a second end surface, through which light can be coupled out of the optical waveguide, wherein at least one of the two end surfaces has an anti-reflective coating.

Abstract: A high voltage instrument transformer includes a measuring assembly and isolator, with at least one sensor for partial discharge measurements. A method for partial discharge recognition in high voltage instrument transformers includes a detection of a signal from at least one sensor for partial discharge measurements, particularly a Transient Earth Voltage sensor.