Superconducting device with a cooling-unit cold head thermally coupled to a rotating superconductive winding
AssigneeSiemens Aktiengesellschaft
InventorFlorian Steinmeyer
Life of this patent
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Abstract
The superconducting device (2) comprises a rotor (5) which is rotatable about an axis of rotation (A) and is provided with a superconductive winding (10) in a heat conducting winding carrier (9). The winding carrier (9) has a central cooling agent cavity (12) with a lateral cavity (13) leading out of the winding carrier (4) connected thereto. A cold head (16) associated with a cooling unit (16) is connected to a condenser unit (18) which condenses the cooling agent (k, k′). A fixed heat tube (20) guiding the cooling agent (k, k′) is coupled to the condenser unit (18), protruding axially into the co-rotating lateral cavity (13) and is sealed in relation thereto.
Claims13
A superconducting device
- having a rotor which is mounted such that it can rotate about a rotation axis and has at least one superconducting winding, whose conductors are arranged in a winding mount which is designed to be thermally conductive,
- and
- having a refrigeration unit which has at least one cold head which is thermally coupled to the winding via parts which conduct heat,
- characterized
- a) in that the winding mount (9) is equipped with a central, cylindrical cavity (12) which extends in the axial direction and to which a lateral cavity (13) is connected which leads out of the winding mount (9),
- b) in that the cold head (16) is located in a fixed manner outside the rotor (5) and is thermally connected to a condenser unit (18) for condensation of a refrigerant (k, k′),
- (c) in that a stationary heat pipe is coupled to the condenser unit, which pipe projects axially into the corotating lateral cavity and seals off this area, and
- (d) in that the heat pipe, the lateral cavity and the central cavity are filled with coolant, with condensed refrigerant (k) being passed via the heat pipe (20) into the lateral cavity (13) and from there into the central cavity (12), and refrigerant (k′) which is vaporized there being passed back via the lateral cavity (13) and the heat pipe (20) to the condenser unit (18).
The device as claimed in one of the preceding claims, characterized in that the refrigeration unit which has the cold head (16) has at least one in particular regenerative cryogenic cooler.
The device as claimed in one of the preceding claims, characterized by a multistage configuration of the cold head.
The device as claimed in one of the preceding claims, characterized in that the superconducting winding (10) can be kept at a temperature of below 77 K by means of the cold head (16).
The device as claimed in one of the preceding claims, characterized in that the conductors of the winding (10) contain metallic low-Tc superconductor material or metal-oxide high-Tc superconductor material.
The device as claimed in one of the preceding claims, characterized in that the heat pipe (20) is in the form of a dripping edge at its end (20a) which projects into the lateral cavity (13).
The device as claimed in one of the preceding claims, characterized in that the lateral cavity (13) widens in the direction of the central cavity (12).
The device as claimed in one of the preceding claims, characterized by a refrigerant flow on the basis of a thermosyphon effect and/or a heat pipe effect.
The device as claimed in one of the preceding claims, characterized in that at least the cold parts of the rotor (5) and the heat pipe (20) are vacuum-insulated.
Dependencies are inferred from the claim text.