Magnetic bearing, as a bearing for a shaft which can rotate,...

Details Magnetic bearing, as a bearing for a shaft which can rotate,... Magnetic bearing, as a bearing for a shaft which can rotate,...

F - Mech Eng,Light,Heat,Weapons

16

C

F16C 39/06 (2006.01)

Patent

CA 2420735

The invention relates to a magnetic bearing (2) for magnetically suspending a rotating shaft (3) within a stator. Said magnetic bearing comprises a first bearing element (5) rigidly linked with the shaft which is enclosed by a second bearing element (13) pertaining to the stator, thereby defining a bearing clearance (12). A system of magnets (7) of the first bearing element with permanent magnet elements (8i) and a cooled superconducting system (14) of the second bearing element with high Tc superconducting material are commonly enclosed by at least one insulating compartment (V1, V2). An additional compartment (25) which is separate from said insulating compartment encloses the bearing clearance (12) and partial compartments (25a, 25b; 26a, 26b) that radially extend on lateral sides of the superconducting system and of the system of magnets up to the shaft (3) and are sealed from the shaft.

L'invention concerne un palier magnétique (2) destiné à soutenir magnétiquement un arbre (3) rotatif à l'intérieur d'un stator. Ce palier magnétique comporte une première partie de palier (5), reliée rigidement à l'arbre, qui est entourée, avec formation d'un espace intermédiaire (12), par une seconde partie de palier (13), qui fait partie du stator. Un premier dispositif magnétique (7) de la première partie de palier, qui comprend des aimants permanents (8i), et un dispositif supraconducteur (14), pouvant être refroidi, de la seconde partie de palier, qui est constitué d'un matériau supraconducteur à Tc élevée, sont entourés ensemble par au moins un espace d'isolation (V1, V2). Un espace complémentaire (25), séparé dudit espace d'isolation, comprend l'espace intermédiaire (12) et, sur les faces latérales du dispositif supraconducteur et du dispositif magnétique, des espaces partiels (25a, 25b; 26a, 26b) qui s'étendent radialement jusqu'à l'arbre (3) et sont, audits emplacements, rendus étanches par rapport à l'arbre.

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