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US 2002/0135249 A1Published application
Magnetic bearing assembly
AssigneeAtlas Copco Energas GmbH
InventorsWolf-Rudiger Canders, Hardo May
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AssigneeAtlas Copco Energas GmbH
InventorsWolf-Rudiger Canders, Hardo May
Estimating the term…
The invention relates to a magnetic bearing assembly of a rotor in a stator, with at least one magnetic bearing (1) comprising a stator part (2) and a rotor part (3) arranged coaxially thereto in the operating position without contacting the stator part. The bearing effective area of the rotor part is formed by a radial exciting system (6) having a permanent magnet (4), while the stator part (2) comprises a high-temperature superconductor concentrically surrounding the radial exciting system (6) while maintaining an annular air gap (10). For increasing the specific rigidity of such a bearing, it is proposed according to the invention that the high-temperature superconductor is divided in at least two HTSC partial shells (7, 8) which, after the transition into the superconducting state, can be displaced against one another by an actuator (12) in the radial direction from a position in the hot state of the bearing, in which each HTSC partial shell (7′, 8′) has a first radial spacing (k) from the radial exciting system (6), into a working position with a second, smaller radial distance (operating gap (0)from the radial exciting system (6).
A magnetic bearing assembly of a rotor in a stator, comprising at least one magnetic bearing (1) having a stator part (2) and a rotor part (3) arranged coaxially thereto in the operating position without contacting said stator part, with the bearing effective area of said rotor part being formed by a radial exciting system (6) comprising a permanent magnet (4), whereas the stator part (2) has a high-temperature superconductor (HTSC) concentrically surrounding the radial exciting system (6) while maintaining an annular air gap (10), characterized in that the high-temperature superconductor is divided in at least two circle segment-shaped partial shells (7, 8) that can be displaced against one another via an actuator (12) in the radial direction after the transition into the superconducting state, from a position in the hot condition of the bearing in which each HTSC partial shell (7′, 8′) has a first radial distance (k) from the radial exciting system (6), into a working position with a second, smaller distance (operating gap o) from the radial exciting system (6).
The magnetic bearing assembly according to any one of the preceding claims, characterized by an additional axial bearing (14) in connection with which two axial exciting systems (16) opposing each other and arranged with an axial spacing from each other and each fitted with permanent magnets (15) each form an axially aligned, annular disk-shaped bearing effective area of the rotor part (3), and with a plane annular disk-shaped HTSC axial bearing disk (18, 19) being associated with each of said bearing effective areas as the stator part (17), said axial bearing disks being displaced from a position in the hot state of the bearing, in which each HTSC axial bearing disk (18, 19) has a first axial distance (k) from the associated axial exciting system (16), are displaceable away from each other after the transition into the superconducting state via an actuator (12) in the axial direction, into a working position with a second, smaller axial distance (o) from the axial exciting system (16).
Dependencies are inferred from the claim text.