Patent ID: 6340855
Filing Date: 2002-01-22
Classification: D01H,F16C

Abstract:
A bearing for shaft of a spinning rotor of an open-end spinning apparatus, the bearing comprising a support disk bearing defining a bearing nip for radially supporting the rotor shaft and a magnetic axial bearing for axially positioning the rotor shaft, the axial bearing having a static bearing component with at least two axially polarized permanent-magnetic rings bounded on opposite sides by pole disks, the permanent-magnetic rings being disposed in a bearing body such that corresponding magnetic poles face one another, and the rotor shaft having at least three ferromagnetic annuli at respective spacings from the pole disks, wherein the support disk bearing is disposed in relation to the static bearing component of the axial bearing to retain the rotor shaft in the bearing nip with a center axis of the rotor at an offset in the direction of the bearing nip from a center axis of the static bearing component, and wherein the static bearing component includes an engagement surface outwardly of the magnetic rings and the pole disks toward the support disk bearing and on the side of the support disk bearing remote from the bearing nip, the engagement surface facing the rotor shaft over an angular extent of at least about 45Â° of the rotor shaft and having a wear protected anti-friction surface layer, and the wear-protected surface layer being spaced a distance, x, from the rotor shaft during operation, with said distance being no more than half the smallest spacing, y, between the pole disks and the ferromagnetic annuli.