SHAFTLESS SPIN ROTOR OF OPEN END SPINNING MACHINE

摘要

PURPOSE: To provide a spinning rotor which enhances running silence and suppresses the generation of heat in a rotational axis region. CONSTITUTION: A disk-shaped permanent magnet 7 and an annular permanent magnet 8 of an opposite polarity existing concentrically therewith via a supporting and insulating layer 19 are arranged within the region of the rotational axis 11 of the spinning rotor 1 constituted as a rotor of an axial magnetic field motor in such a manner as to respectively project from the bearing surface on the rotor 1 side formed by a magnetic supporting body 5 apart air gaps 14 and 15 in the axial direction and radial direction into the notch of a stator 2. Further, a yoke 6 for the guiding magnetic fields of the rotor 1 is fixed together with driving magnets 4 and 4' to a spinning tray 3 by means of the magnetic supporting body 5 and is parted from a spinning tray bottom 3' acting as the yoke of the driving magnets 4 and 4' apart the air gap acting as a blocking layer 9 to minimize the influence of alternating components by decoupling the respective magnetic fluxes of the guiding magnetic fields as driving magnetic fields, by which the eddy current in the rotating cycle is decreased and the deviation between the mechanical rotational axis and the magnetic axis is eliminate.