Kraftwerk Union Aktiengesellschaft

Dietrich Lambrecht

Erich Weghaupt

Heinrich Beermann

Hermann Finckh

Kurt Fork

Arnold Abolins

Martin Trabler

Helmut Munch

Willi Jacobs

Hermann Waldmann

Helmut Hofmann

Lothar Grimm

Device for bracing an air-gap winding in a stator of an electric machine wherein individual winding bars are secured between a radially outer stack of stator laminations and a radially inner nonmagnetic support cylinder, includes spacer wedges disposed between respective pairs of the individual winding bars in circumferential direction, at least some of the spacer wedges being in the form of mounting wedges having dove-tailed extensions received and braced in corresponding recesses formed in the stack of stator laminations at the inner circumference thereof, and the remainder of the spacer wedges being in the form of tightening wedges having tangential bracing means includes at least one flexible tube subjectible to internal pressure, and radial bracing means similarly includes at least one flexible tube subjectible to internal pressure.

Device for bracing an air-gap winding

In a coolant circuit for an electric machine rotor mounted on a shaft and having a superconductive excitation winding, a cold shield with a damping winding surrounding the excitation winding, as well as a coolant connecting head surrounding one end of the shaft at the excitation winding side thereof, a device for feeding coolant from a refrigerating machine through the coolant connecting head to an axial bore formed in the rotor shaft and from the axial bore to a collection chamber surrounding the shaft, coolant channels for the excitation winding disposed in the rotor, a cold shield with a damping winding surrounding the coolant channel in the rotor, a coolant outlet channel in the shaft communicating with the collection chamber, the coolant channels and the damping winding being connected to one another and connecting the axial bore formed in the rotor shaft to the coolant outlet channel, and a throttling member in the coolant outlet channel for reducing coolant outlet pressure.

Coolant circuit for the rotor of an electric machine having a

Device for monitoring the service life of the shaft of a turbine-generator set includes an analog computer circuit having a pair of inputs and an output, means for feeding to the inputs of the analog computer circuit electrical quantities proportional to the voltage and the current of the generator, the analog computer circuit having means for converting the electrical quantities that are proportional to the generator voltage and current to an electrical quantity proportional to the electrical torque in the air gap of the generator, a simulation circuit having an input connected to the output of the analog computer circuit for receiving therefrom the electrical quantity proportional to the electrical torque in the air gap of the generator, the simulation circuit comprising means for determining the torques in individual sections of the shaft of the turbine-generator set and having a multiplicity of outputs corresponding to the number of individual sections of the shaft, an analog-to-digital converter having an output and having inputs connected to the outputs of the simulation circuit for receiving therefrom analog data corresponding to the torques in individual sections of the shaft and converting them to corresponding digital data, a digital computer having an input connected to the output of the analog-to-digital converter and connected therethrough to the simulation circuit, a trouble-monitoring device connected parallel to the analog-to-digital converter, and having means for restricting the analog-to-digital converter to feed the digital data through the output thereof to the input of the digital computer only if a torque of extreme value is present in a section of the shaft, the digital computer having means for converting the digital data into signals proportional to the service life of the shaft.

Durability or service-life monitoring device for a turbogenerator shaft

Coolant circulation system for the rotor of an electric machine having a superconductive excitation winding and carried by a rotary shaft includes a radially outer cold shield surrounding the superconductive excitation winding, a coolant junction head surrounding the shaft at an end thereof adjacent the excitation winding, the coolant junction head having an inlet communicating with an axial bore formed in the shaft, means for refrigerating a coolant, means for conducting coolant from the refrigerating means through the coolant junction head to the shaft bore, means defining a collection chamber surrounding the shaft and communicating with bore means formed in the shaft for discharging the coolant from the shaft, first cooling channels located in the radially inwardly disposed excitation winding and communicating with the shaft bore, and second cooling channels located in the radially outwardly disposed refrigerating shield, the first and the second cooling channels being serially connected and being successively traversible by the same coolant conducted to the shaft bore.

Coolant circulation system for the rotor of an electric machine having a

Floating ring seal means for cooling water pumps, especially for cooling water connectors of water-cooled rotors of turbogenerators. A stabilization of the floating ring is achieved through pistons which are pressurized by pump pressure. This results in a ring seal holding force which increases proportionally to an increasing number of revolutions.

Floating ring seal means

In order to support the coil ends of liquid-cooled stator windings of turbo generators or the like, the coil ends or conductor bars are disposed between a support ring and segment-shaped cover plates. The support ring and cover plates extend about complete circumferences and the conductor bars of the coil ends are rigidly clamped against the support ring by means of clamping bolts which engage the cover plates and the support ring.

Coil end support for the stator winding of electric machines such as

In liquid cooled rotors of turbogenerators with half-turn cooling and cooling water feed at the dynamo side as well as cooling water discharge through a collecting chamber on the turbine side, the cooling water collecting chamber is arranged within the generator housing, axially immediately adjacent to the receiving chamber, and is sealed against the rotor shaft by labyrinth rings through which is provided, as a barrier, a flow of the cooling gas for the generator housing.

Electric machines, particularly turbogenerators, having liquid cooled

A turboset located in an engine room containing a helium atmosphere under overpressure includes a generator cooled by helium which is introduced therein through openings formed in the generator housing and flows through a connecting line to a location of the helium circulatory loop that has a gas pressure lower than the internal gas pressure of the chamber.

Growing community of inventors

Mulheim (Ruhr), Germany

Dietrich Lambrecht