SPINDLE DISK DRIVE Russian patent published in 1997 - IPC

FIELD: electrical engineering; bearing cartridges using magnetic material base lubricants. SUBSTANCE: drive has cylindrical shaft which is, essentially, permanent magnet whose ends are of opposite polarity, and pair of ring-shaped combined radial-thrust hydraulic bearings using magnetic liquid base lubricant. Novelty is that drive has stator and rotor in the form of concentrically shaft-mounted rings and central core with axial duct and annular axial recess with beveled walls. Rotor also has annular end caps each having cup-shaped cavity in center to receive shaft ends and permeable annular boss. Hydraulic bearings are mounted on shaft extensions with projecting ends and bevel side surfaces mating mentioned beveled walls. Gaps are formed between ends of annular bosses and rotor core. EFFECT: reduced vibration level, improved stability to mechanical impacts, reduce cost, improved reliability, and facilitated access. 7 cl, 17 dwg