Abstract: A cryosorption pump for perpetuating a thermal insulating vacuum in the superconducting rotor of an electric machine, in particular, a turbogenerator, is constructed in a co-rotating transfer part of the rotor along the axis of rotation thereof. The rotor comprises a superconducting exciter winding part which is to be cooled by a cryogenic coolant, and to which winding part the coolant is introduced via at least one appropriate coolant supply line. The chambers of the rotor winding part to be evacuated are directly connected to the cryosorption pump in the co-rotating transfer part. Furthermore, the cryosorption pump is thermally connected within the co-rotating transfer part with the at least one coolant supply line.

Abstract: A device for coupling two shafts of a rotating machine for permitting simultaneously a thermal dilatation and a sealing of the shafts with respect to each other, in combination with the shafts, includes inner and outer normally synchronously rotating mutually concentric shafts defining a ring gap therebetween, at least the outer shaft being hollow defining a space between the shafts, an expansion compensator with a given maximal permissible twist disposed between the inner periphery of the outer shaft with one end and the outer periphery of the inner shaft with its other end sealing the space between the shafts and permitting relative axial, radial and tangential motion between the shafts, a holding ring rotatably and sealingly supported on the inner shaft connected sealingly to said other end of the expansion compensator thereby permitting a twisting movement thereof with respect to the inner shaft, and at least one driver element attached to the outer shaft engaging the inner shaft via the holding ring with

Abstract: A cooling arrangement for a superconducting field winding of an electric machine, especially a turbo-generator, has a coolant space which contains a cryogenic coolant fed into it via a feed line, for cooling the field winding, and a coolant supply chamber which contains liquid coolant for cooling a damper shield. So that no separate feed and discharge lines are required for cooling the damper shield independently of the cooling of the field winding, the coolant supply chamber is connected directly to the coolant feed line via a radial connecting line, and the flow cross sections of the connecting line and of the section of the coolant feed line between the connecting head and the connecting point of the connecting line are made large.

Abstract: A cooling device for a superconducting field winding of an electric machine, especially a turbo-generator, contains an exhaust gas line connected to a coolant space for cooling an end piece at the end face of a torque transmitting rotor body part as well as a coolant line extending along a damper shield arranged around the field winding. In order to utilize the liquid coolant in a particularly economical and simple manner, the coolant line of the damper shield is a section of the coolant exhaust gas line, and this section is arranged, as seen in the flow direction of the coolant exhaust gas, ahead of the line section of the torque transmitting end piece.

Abstract: Generator rotor, including an inner and an outer concentric rotor part having a non-drive side and enclosing a high vacuum space, a first and a second bearing disposed on the non-drive side, a hollow shaft end of the outer rotor part being supported in the first bearing, a journal of the inner rotor part being extended through the hollow shaft end and separately supported in the second bearing, a high-vacuum contactless liquid seal disposed between the hollow shaft end and the journal and having a sealing gap formed therebetween, a co-rotating sealing-liquid reservoir connected to the liquid seal, and magnetic field means for holding magnetic sealing liquid in the sealing gap.

Abstract: The cooling arrangement of the superconducting field winding of a turbo-generator contains a coolant chamber, in which a vaporous and a liquid phase of a coolant are contained, and to the vapor space of which a coolant discharge line with a high flow resistance is connected. To prevent excessive over-pressure in the coolant chamber in the event of a quench, a buffer tank is also connected to the vapor space via a connecting path having a relatively low flow resistance.

Abstract: A coolant replenishing system for cooling the superconducting field winding of a machine, illustratively a turbo-generator. The machine is provided with a rotating antechamber in which is disposed a coolant in liquid and gaseous phases. Liquid coolant is delivered to the antechamber from a supply tank by a coolant supply line. The discharge opening of the coolant supply line in the antechamber is oriented away from the axis of rotation of the machine, and disposed at a predetermined radius with respect to the axis so that the input pressure of the coolant at the opening of the coolant feed line is in equilibrium with the pressure of the liquid coolant in the rotating antechamber.

Abstract: In a turbogenerator rotor, a winding support cylinder coaxially mounted on the rotor and formed with axially extending slots distributed about the periphery thereof, the slots having a radial extending cross section, and a superconductive exciter winding having coils formed of a multiplicity of directly cooled mutually superimposed conductors fixed in the slots, the conductors of a respective coil located at the radially inner part of the slot having a greater cross section than the conductors disposed in the radially outer part of the slot; and method of producing the superconductive exciter winding.

Abstract: Bearing system for a rotor of an electric machine having an outer rotor part formed as a hollow cylinder and an inner rotor part disposed therewithin, the rotor having a drive side and an exciter side at opposite ends thereof, the inner rotor part being operatable in cryogenic temperature range and being fastened thermally insulatingly with respect to the outer rotor part, which is warmer relative to the inner rotor part, the inner rotor part being firmly flanged to the outer rotor part at the exciter side, the outer and the inner rotor parts having separate outer and inner coaxial shaft shanks supported so as to be movable thermally in axial direction independently of one another, an expansion compensator being disposed between the outer and the inner coaxial shaft shanks and serving also for sealing from the outside a hollow space formed between the inner and the outer rotor part, includes first and second separate shaft bearings with respective bearing boxes associated with the outer and inner shaft shanks

Abstract: Cooling system for a rotor of an electric machine having a superconductive field winding and formed of a rotor drum with at least one outer, substantially hollow cylindrical rotor body with a co-rotating cold shield, an inner hollow rotor body fastened at given locations within the outer rotor body so as to be thermally insulated and serving as a coil-winding support, the fastening locations at the outer rotor body being cooled, and a co-rotating mixing chamber located at the inner periphery of the inner hollow rotor body and containing a phase mixture of a coolant fed thereto from the outside, the phase mixture forming, during rotation of the rotor, a radially outwardly flung liquidring and a radially inner vapor column coaxial thereto, including channels for conducting a first coolant flow with liquid coolant from the mixing chamber for cooling the field winding and a second coolant flow with at least partly vaporized coolant for cooling the fastening locations and for returning the first coolant flow, afte

Abstract: In an electric machine with a superconducting exciter winding and a cylindrical shaft end piece in its rotor around which end piece a nonrotating connector head part is arranged, with at least one bearing and at least one sealing device provided between these components, the radial bearing clearance is made so small that the connector head part follows the radial deflections of the shaft end piece from its ideal position relative to the axis of rotation permitting the use of seals with good sealing properties, in particular ferrofluidic seals.

Abstract: Arrangement for cooling the rotor of an electric machine, including a superconducting field winding, a cold shield surrounding the winding, and a mixing chamber containing a phase mixture of coolant fed in, a stream of liquid coolant for cooling the winding and a stream of partially evaporated coolant for cooling the cold shield, the second stream being conducted through the cold shield and returned from the machine in an outer loop, the first stream being conducted through inner loops, through cooling canal sections of conductors, and returned to the chamber, the coolant in the loops being transported by the self-pumping effect of the rotor, the inner loops having radial entrance and exit branches distributed over the length and circumference of the rotor and winding, chamber sections associated with the inner loops, the chamber sections having an axial length and radial height forming pockets leading into the entrance branches for coolant which is cooler than the average temperature of the liquid phase and

Abstract: A water-cooled turbogenerator rotor mounted on a rotor shaft and having water-cooled end turn leads surrounded by a rotor end-bell and further having radial current-contact pins contacting ends of exciter current lines disposed in the rotor shaft, the pin being cooled by cooling water fed thereto through high-pressure insulating hoses from cooling-water distribution chambers provided on the rotor shaft, the pins being connectible at radially outer ends thereof to the water-cooled end turn leads disposed in slots formed on the rotor shaft and to the high-pressure insulating hoses, a device for cooling and electrically connecting the exciter current lines includes respective widened contact straps formed at respective ends of the end turn leads extending out from the rotor end bell and at the respective radially outer ends of the current-contact pins, the widened contact straps of the end turn leads and the current-contact pins being received in a slot formed in the surface of the rotor shaft and being in mutua

Abstract: A coolant circulatory loop for a turbogenerator rotor having a superconductive field winding and a damper and cold shielding surrounding the field winding, the field winding being cooled by deeply-cooled liquid helium, and the damper and cold shielding by an at least partly vaporized partial flow of helium that has flowed through the field winding, includes a mixing chamber, means for feeding liquid helium in forced circulation from the mixing chamber to the field winding wherein it is heated due to winding losses and pressure reduction and is partly evaporated, means located in the rotating rotor for recooling the non-evaporated helium by removing heat of vaporization therefrom and returning the thus recooled helium to the mixing chamber, cooling means external to the rotor for recooling the partial flow of helium after it has cooled the damper and cold shielding and means for feeding the recooled partial flow of helium back to the mixing chamber.

Abstract: An assembly is provided for mutually coupling a generator rotor which has a superconductive exciter winding, and a shaft, which carries exciter current leads. Disconnectible electrical, hydraulic and mechanical connections are located in the vicinity of the coupling assembly and extend in axial direction of the rotor and the shaft. The coupling assembly includes a pair of coupling halves in the interior of which a hollow chamber, which is gas-tightly sealed against the outer atmosphere, is defined.The disconnectible connections are located in the hollow chamber and include axially movable and releasable telescoping socket-like plug members for a coolant circulatory system and for the exciter current leads. The telescoping socket-like plug members are displaceable in axial direction thereof relative to one another upon insertion thereof in and disconnection thereof from one another and upon thermal expansion thereof.

Abstract: Cooling system for a superconductive exciter winding in a turbogenerator rotor, the exciter winding having winding coils formed of a multiplicity of individual windings that are received in slots formed at the outer periphery of a solid support cylinder and retained therein by a bracing cylinder shrink-fitted on the support cylinder, includes coolant distribution channels disposed radially in teeth located between and defining the slot formed in the support cylinder and in filler members located between winding head coils, the coolant distribution channels surrounding the individual windings over the entire length thereof and being connected in peripheral direction on both sides thereof with coolant channels extending substantially parallel to one another in radial direction with the individual winding coils and surrounding the same at the bottom of the slots; and method of production.

Abstract: Method of introducing the coils of a superconductive exciter winding into slots formed in a winding support member of a turbogenerator rotor with respectively two coil sides formed of a multiplicity of mutually superimposed conductors in each slot, the slots having a radially extending cross section with the base thereof disposed at the radially inward end thereof, which includes winding first an inner coil and then an outer coil of a pair of concentric coils forming respective parts of a double coil into two of the slots spaced from one another in accordance with the respective width of the coil, the inner and the outer coils into the respective slots being continuously wound beginning at the slot base and in respective opposite rotary sense so that a non-interrupted transition from the inner coil to the outer coil occurs at the slot base.

Abstract: 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.

Abstract: In a turbogenerator rotor, the combination of a superconductive exciter winding formed of a multiplicity of individual windings and a winding support cylinder wherein the superconductive exciter winding is securely received, the support cylinder being formed with axially extending slots uniformly distributed about the periphery thereof, the slots having respectively equal dimensions, and having a content of respectively equal dimension and equal weight, the content of the slots including the superconductive exciter winding embedded therein; and method of production.

Abstract: 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 successi