MAGNETIC BEARING UNIT FOR VERTICAL ROTOR Russian patent published in 2002 - IPC

FIELD: mechanisms for driving centrifugal apparatuses, upper magnetic support devices for rotors with vertical rotation axis. SUBSTANCE: bearing unit includes mounted in housing cylindrical axially magnetized magnet, ferromagnetic sleeve coaxially mounted on rotor and arranged in front of lower end of magnet; annular chamber with damping liquid. Inside chamber there is radially movable annular member suspended by means of flexible filaments and having inner ferromagnetic ring and joined with it outer non-magnetic ring. The last has radial section with L-shaped contour and in cylindrical part it has opened downwards vertical slits for placing flexible filaments. Lower ends of filaments are secured to bottom part of annular chamber; upper ends of filaments are secured to radially moving member. When inner ferromagnetic ring is joined with vertical part of outer ring by means of flexible membrane, damper suppresses not only radial oscillations but also axial oscillations of rotor. EFFECT: simplified assembling and regulation of damping parameters of magnetic bearing unit, enhanced operational reliability. 4 cl, 5 dwg