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US 2003/0155830 A1Published application
Magnetic bearing with damping
AssigneeLeybold Vakuum GmbH
InventorsChristian Beyer, Heinrich Englander, Josef Hodapp
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AssigneeLeybold Vakuum GmbH
InventorsChristian Beyer, Heinrich Englander, Josef Hodapp
Estimating the term…
The invention relates to a magnetic bearing for rapidly rotating machines (1), in particular, for turbo compressors, drag vacuum pumps, or similar, comprising two bearings (3, 4), each with a stator magnetic-ring set (5, 7) and a rotor magnetic-ring set (6, 8) and means (31) for damping the rotor movement, preferably in a radial direction. According to the invention, the damping means may be simplified, whereby the magnetic bearing (3, 4) consists of magnetic-ring sets (5, 6; 7, 8) arranged concentrically to each other, in which the fixed magnetic-ring set (5 or 7) is arranged externally and the rotating magnetic-ring set (6 or 8) is arranged internally and the damping means (32, 54, 55) are connected to the outer circumference surfaces of at least one part of the magnetic ring of each of the stator-side magnetic-ring sets (5, 7) and is made from a non-magnetic, material with good electrical conducting properties.
Magnetic bearing for rapidly rotating machines (1), in particular, for turbo compressors, drag vacuum pumps, or similar, comprising two bearings (3, 4), each with a stator magnetic-ring set (5, 7) and a rotor magnetic-ring set (6, 8) and means (31) for damping the rotor movement, preferably in a radial direction, wherein the magnetic bearing (3, 4) consists of magnetic-ring sets (5, 6;
Magnetic bearing in accordance with one of the above claims, wherein also the rotating magnetic-ring sets (6, 8) are equipped with damping means in accordance with the above claims.
Magnetic bearing in accordance with one of the above claims, wherein at least one coil (23) controlled by a position sensor (21) as well as pole components (24) encompass the outer magnetic-ring set (8) of the axially controlled bearing (4).
Magnetic bearing in accordance with one of the above claims, wherein the number of the magnetic rings of the two ring sets (7, 8) of a magnetic bearing (3, 4) differ.
Magnetic bearing in accordance with one of the above claims, wherein the diameters of the circumferential surfaces of the rings of a pair of ring sets (5, 6 resp. 7, 8) change in steps.
Drag pump with rotor and stator, wherein the rotor (2) is suspended in a magnetic bearing in accordance with the above claims.
Dependencies are inferred from the claim text.