Abstract: In a gas turbine, the exhaust gas casing (5) consists of a ring-shaped hub-end inner part (6) and a ring-shaped outer part (7), which parts bound a diffuser (9) and are provided with a horizontal split plane. The exhaust gas casing merges into an exhaust gas duct, whose boundary walls likewise consist of a ring-shaped hub-end inner part (16) and a ring-shaped outer part (17). The split locations between the exhaust gas casing and the exhaust gas duct are configured as flange connections (7A, 17A and 6A, 16A respectively). The flanges (7A, 17A and 6A and 16A respectively) at the split locations have a conically extending contact surface.

Abstract: The high temperature alloy is intended for machine components subjected to high mechanical and thermal stress. It is essentially based on doped TiAl and has the following composition:______________________________________ Ti.sub.x El.sub.y Me.sub.z Al.sub.1 -(x + y + z), in which El = B, Ge or Si and Me = Co, Cr, Ge, Hf, Mn, Mo, Nb, Pd, Ta, V, W, Y, and/or Zr and: 0.46 .ltoreq.x .ltoreq.0.54, 0.001 .ltoreq.y .ltoreq.0.015 for El = Ge and Me = Cr, Hf, Mn, Mo, Nb, Ta, V and/or W, 0.001 .ltoreq.y .ltoreq.0.015 for El = Si and Me = Hf, Mn, Mo, Ta, V and/or W, 0 .ltoreq.y .ltoreq.0.01 for El = B and Me = Co, Ge, Pd, Y and/or Zr, 0 .ltoreq.y .ltoreq.0.02 for El = Ge and Me = Co, Ge, Pd, Y and/or Zr, 0.0001 .ltoreq.y .ltoreq.0.01 for El = B and Me = Cr, Mn, Nb and/or W, 0.01 .ltoreq.z .ltoreq.0.04 if Me = an individual element, 0.01 .ltoreq.z .ltoreq.0.08 if Me = two or more individual elements and 0.46 .ltoreq.(x + y +z) .ltoreq.0.54.

Abstract: In a fiber-optic sensor for measuring electric fields and voltages, in place of a double-mode fiber extending between sensor head (15) and evaluating unit (14) two separate, similar double-mode fibers (5a, 5b) are connected in series in the manner of a tandem interferometer. The first double-mode fiber (5a), serving as sensor fiber, is operated in reflection geometry. Together with the sensor element (6), it is disposed in the sensor head (15). The second double-mode fiber (5b), serving as reference fiber, is situated within the separate evaluating unit (14). Within the latter there is also provided at least one fiber coupler or beam splitter, which is required on account of the operation of the sensor fiber in reflection geometry. Sensor head (15) and evaluating unit (14) are connected by a single insensitive monomode fiber.

Abstract: In an axial flow turbine with a row of individually adjustable guide vanes (8) and a row of rotor blades (5), the guide vanes can be rotated by an adjusting shaft (9) supported in a casing (4) and passing through a vane carrier (3). The tips of the rotor blades seal against a cover (7). In order to match the duct contour to different heights of blading (5, 8), only the vane carrier (3) and the cover (7) are designed to be exchangeable, with otherwise unaltered machine geometry.

Abstract: An axial-flow turbine has at least one row of bowed guide vanes (7) and at least one row of rotor blades. The bowing of the guide vanes (7) over the vane height is selected at right angles to the chord and is directed towards the pressure side of the respectively adjacent guide vane in the peripheral direction. The guide vanes are tapered in their radial extent. Secondary losses, which occur due to the deflection of the boundary layers in the guide vanes, are reduced by this measure.

Abstract: In a two-point or three-point inverter, a feedback circuitry is provided, which is disposed in parallel with a feedback capacitor (CR), and essentially include a semiconductor valve (SR) and a transformer (TR). As a result of switching the semiconductor valve (SR) once, the energy of the protective-circuit reactances, which have been stored in the feedback capacitor, is fed back into the link-circuit voltage source by the transformer. The arrangement according to the invention is distinguished by a high efficiency, accompanied at the same time by high turn-on/turn-off frequency of the semiconductor switch.

Abstract: A device for mixing two gaseous components, particularly in the context of a burner in which it is desired to mix the two gaseous components prior to combustion. The device includes a tangential inlet flow duct which opens into an inlet flow gap. A first gaseous component flows in through this inlet flow gap, and a second gaseous component flows through inlet flow nozzles provided in the region of the inlet flow gap. The arrangement achieves particularly intimate mixing, such that an improved burner is provided. Ramps are disposed in the region of the inlet flow duct, with the ramps including an end having a separation edge in the inlet flow gap. The inlet flow nozzles are arranged in the region around the separation edge such that mixing is promoted by longitudinal vortices occurring in the region.

Abstract: In a fiber optic sensor for measuring electric fields and voltages, in place of a bimode fiber extending between sensor head (14) and evaluation unit (13) two separate bimode fibers (4a, 4b) of the same type are connected in series in the manner of a tandem interferometer. The first bimode fiber (4a) is disposed, together with the sensor element (6), in the sensor head (14). The second bimode fiber (4b) is situated within the separate evaluation unit (13). In this way, the sensor head (14) and the evaluation unit (13) are connected only by insensitive monomode fibers (2a, 2b).

Abstract: In a method for reducing the pressure of a gas (12) from a primary network, this gas (12) is first fed through a heat exchanger (9) whose temperature potential comes from the exhaust gases (8) of a gas turbine (2), this gas turbine (2) being a constituent part of a gas turbine group (1, 2, 3, 4). Downstream of this heat exchanger (9), the gas (14) is admitted to an expander (10) which drives a compressor (11). The reduced pressure gas (15) from the expander (10) is used to operate the combustion chamber (4) of the gas turbine group. The compressor (11) provides a certain quantity of compressor air (17) which is introduced into the compressor (1) of the gas turbine group. Because both the thermal treatment of the gas (12) from the primary network and the compressor air (17) become available by using internal energy released by the process, the electricity yield from the generator (3) of the gas turbine group is increased in a manner specific to efficiency.

Abstract: A multi-zone diffuser for an axial-flow turbomachine has a minimal overall length and a first zone with a minimal diameter. The kink angles of the diffuser inlet both at the hub and at the cylinder of the turbomachine are fixed exclusively for evening out the total pressure profile over the duct height at the outlet from the last rotor blade row. In the form of streamlined struts, are provided within the deceleration zone of the diffuser for the removal of swirl from the swirling flow. A first diffusion zone extends from the outlet plane of the last rotor blade row to a plane at the outlet of the streamlined struts and is configured as a single duct and as a bell shaped diffuser. A second diffusion zone is fashioned in the form of a multi-duct diffuser part, flow guide rings being arranged downstream of the streamlined struts.

Abstract: In the case of the multiphase switching system (1), each (for example L.sub.3) of the phase conductors is arranged in the course of a generator output line (2), which is arranged between a generator (7) and a network transformer (8), together with a switching apparatus, in encapsulation (5) which is insulated by air gaps, in a manner isolated from the other phase conductors.The switching system is intended to allow virtually all the switching, protection, and measurement functions occurring in a generator arrangement to be executed despite a compact and space-saving construction.This is achieved by the switching apparatus (three-position interrupter switch 10) having at least two switching positions. A first of these two switching positions is arranged between the generator (7) and an output of the switching system (1) which acts on the network transformer (8).

Abstract: Method of controlling electric valves of a converter using a universal algorithm for generating pilot signals (11) for multistage and multiphase line- and self-commutated converters (13, 14) is specified, by means of which it is possible to control different types of converters. The control algorithm can be realized as hardware or software. The invention is particularly suitable for multisystem locomotives. It is possible to change over to another feed system of the locomotive by a simple reprograming of a modulator (9) of a pilot signal generator (10). The modulator (9) and a pulse generator (8) receive modulator control signals (7) or pulse generator control signals (6) from a setter (5), together with which they form the pilot signal generator (10).

Abstract: In an axial flow gas turbine, the outlet blading followed by an exhaust casing (5) whose boundary walls essentially comprise a ring-shaped inner part (6) at the hub and a ring-shaped outer part (7) which delimit a diffusor (9). The outlet-end bearing arrangement (4, 11) of the turbomachine is arranged in the hollow space within the inner part. The bearing casing (11) can be repositioned by adjustment elements (12) arranged on the inner part (6) of the exhaust casing and is supported on the foundation via at least one sprung support (15).

Abstract: The input and/or output device for process data exhibits a subrack (1) and at least one assembly (2) mounted on the subrack (1) and a process connector (4) which can be frictionally introduced into the at least one assembly at the front. The at least one assembly (2) exhibits a circuit board (17) arranged in a housing and a connector strip (18) which is frictionally connected to the process connector (4). This device is to be of simple and appropriate design and, at the same time, loading of the circuit board (17) with large mechanical forces is to be avoided. This is achieved by the fact that the connector strip (18) is mechanically rigidly connected to the housing and contains elastically deformable terminal pins (21) on which the circuit board (17) is supported.

Abstract: The corona-shielding arrangement for the stator winding of an electric machine, comprising a semiconductive textile corona-shielding strip wound around the major insulation of slot portion and end yoke portion of each bar of the stator winding is constructed such that the slot portion (10) of the stator winding bar is wound around in at least one layer with a first semiconductive, volume-conducting coronashielding strip (24) having an approximately constant degree of overlap. The end yoke portion is wound around in at least one layer with a second semiconductive, volume-conducting corona-shielding strip (24), the degree of overlap from the exit of the bar from the stator body (14) to the bar end becoming continuously smaller. This corona-shielding arrangement is economic to produce; the voltage characteristic in the longitudinal direction of the bar is simple to optimize.

Abstract: In a direct-current arc furnace having a bottom contact (3) which has a large area, electromagnetically produced bath agitations are influenced by an electromagnet (9) disposed underneath the vessel bottom (4) such that the natural flow in the melt bath, caused by the current flow in the melt, is reversed in direction. In this way the stability of the bottom electrode (3) is substantially increased. The electromagnet (9) is preferably integrated into the electric supply system of the furnace and serves as a smoothing choke.

Abstract: A dynamic pressure machine with integrated combustion has a cellular wheel containing a number of cells, in which a continuously recurring ignition and combustion process takes place. Neither energy supply from the outside nor a control action should be required to maintain this continuously recurring process. Means are provided for the automatic ignition and combustion of the entering fresh air-fuel mixture, in particular: at least one hot gas pocket disposed on the wall of the cell; a catalytic coating of the cell wall; and, a hot spot in the cell.

Abstract: In the case of a gas turbine, containing a turbine (10) and a compressor (11), it is intendeda) to increase the efficiency of the individual components (10, 11),b) to reduce the undesired exhaust gases, i.e. NOx formation.Means (21) of generating cooling air of higher quality are used. In particular, cooling air of higher quality can be generated by a booster (21) which contains a booster compressor (23) and a booster turbine (22). A further increase in efficiency is achieved by a heat exchangers (29, 30) on the booster (21). The booster turbine (21) is driven by the fuel and the booster compressor (23) compresses the compressed air generated in the compressor (12) to form the cooling air of higher quality. The advantage of this plant is the utilization of previously unused energy of natural gas.

Abstract: In a combined gas/steam power station plant which consists essentially of a fossil-fired gas turbine group and a steam circuit, with an exhaust heat boiler (11) in between, intercooling and reheat are provided to maximize the efficiency. The gas turbine group consists of two compressors (1, 2), of two combustion chambers (7, 9) and of two turbines (8, 10). Downstream of the first compressor (1), there is an intercooler (3) and on the cool side of this is placed an evaporator (4) which is in effective connection with the intercooler. The steam quantity formed in the evaporator (4) is introduced into a turbine (6) of the steam circuit, the result of this being a first improvement in efficiency. Downstream of the first turbine (8), there is a second combustion chamber (9) in which the exhaust gases from the first turbine (8) are processed to produce hot gases for the second turbine (10) .

Abstract: An electric resistor has a resistor body arranged between two contract terminals. This resistor core includes an element with PTC behavior which, below a material-specific temperature, forms an electrically conducting path running between the two contact terminals. The resistor can be simple and inexpensive, but still have a high rate current-carrying capacity protected against local and overall overvoltages. This is achieved by the resistor core additionally containing a material having varistor behavior. The varistor material is connected in parallel with at least one subsection of the electrically conducting path, forming at least one varistor, and is brought into intimate electrical contact with the part of the PTC material forming the at least one subsection. The parallel connection of the element with PTC behavior and the varistor can be realized both by a microscopic construction and by a macroscopic arrangement.