This invention relates to a
spinning rotor bearing
system for a rotor
spinning apparatus, comprising a rotor shaft (10) of a
spinning rotor (2) and a bearing unit (1) for a radial and axial combined bearing for the rotor shaft (10), the rotor shaft (10) comprising a permanent
magnet (20) and an end face (18). The bearing unit (1) comprises a
stator having a first axial yoke (11) and a second radial yoke (12), the first yoke (11) comprising a first
diameter (D) J1 The first opening (8) of the yoke (12) includes a boss (14). The second yoke (12) includes a second
diameter (D). J2 The second opening (9) of the first opening (8) forms a radial air gap (S) between the first opening (8) and the rotor shaft (10). R1 An axial air gap (S) is formed between the end face (18) and the boss (14). A An additional radial air gap (S) is formed between the circumferential surface of the rotor shaft (10) and the second yoke (12). R2 The permanent
magnet (20) of the rotating cup shaft (10) is arranged between the first yoke (11) and the second yoke (12).