US 12,110,615 B2
Axial bearing and pole disk for an axial bearing
Gernot Schaeffler, Waeschenbeuren (DE)
Assigned to Maschinenfabrik Rieter AG, Winterthur (CH)
Filed by Maschinenfabrik Rieter AG, Winterthur (CH)
Filed on Jul. 26, 2022, as Appl. No. 17/873,350.
Claims priority of application No. 10 2021 119 614.0 (DE), filed on Jul. 28, 2021.
Prior Publication US 2023/0031746 A1, Feb. 2, 2023
Int. Cl. D01H 4/12 (2006.01); F16C 32/04 (2006.01); D01H 7/12 (2006.01)
CPC D01H 4/12 (2013.01) [F16C 32/0419 (2013.01); D01H 7/12 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An axial bearing for a spinning rotor of an open-end spinning machine, wherein the spinning rotor is supported free of axial thrust in a bearing interstice of a support disk bearing arrangement, the axial bearing comprising:
a static bearing component comprising at least two axially polarized permanent magnet rings delimited on both sides by ferromagnetic pole disks, the magnetic rings and pole disks arranged in a bearing housing such that, in an installed state, identical poles are positioned opposite each other;
the static bearing component configured for interacting during operation with a dynamic bearing component formed by ferromagnetic webs arranged on a rotor shaft of the spinning rotor at a distance from the pole disks;
each pole disk comprising a disk ring and a central opening, each pole disk further comprising a vertical axis and a horizontal axis;
the disk ring comprising an area of reduced ferromagnetic material on an inner circumference thereof at the vertical axis as compared to a remaining inner circumferential area of the disk ring; and
wherein the area of reduced ferromagnetic material is defined by one or both of a chamfer formed in the disk ring or a non-ferromagnetic material added onto the disk ring.