Method For Detecting Changes Of Position Of Shaftless Spinning Rotor And Spinning Unit

Abstract

The invention relates to a method for detecting changes of position of a shaftless spinning rotor of an open-end spinning machine in a cavity of an active magnetic bearing and a spinning unit supporting the open-end spinning machine of a driving magnetic bearing of the shaftless spinning rotor. Continuously is detected radial shifting of the spinning rotor and simultaneously is continuously detected inclination of the spinning rotor, whereupon according to the detected changes in the position of the spinning rotor is determined shifting and / or inclination of the spinning rotor which is used for subsequent adjustment of the controlling of position of the spinning rotor in the active magnetic bearing. Position sensors of the spinning rotor are grouped in pairs whereby two sensor pairs for determining radial shift of the spinning rotor are arranged on opposite sides of the spinning rotor counter the spinning rotor cylindrical wall; At the same time, the two sensor pairs for determining incline of the spinning rotor are arranged on opposite sides of the spinning rotor counter the spinning rotor wall, which is perpendicular to the spinning rotor axis of rotation.

Description

Technical field [0001] The present invention relates to a method for detecting the position change of a shaftless spinning rotor of an open-end spinning machine in a cavity of an active magnetic bearing, wherein the position of the spinning rotor is detected by a sensor system and based on the detected The position of the spinning rotor is changed to adjust the control of the active magnetic bearing, so as to eliminate the undesired changes in the position of the spinning rotor in the cavity of the active magnetic bearing. [0002] The present invention also relates to a spinning unit of a free-end spinning machine having an active magnetic bearing for supporting a shaftless spinning rotor, which includes a component for generating and controlling a magnetic field in which the spinning rotor is arranged, wherein The bearing also includes a sensor for the position of the spinning rotor, the sensor is connected to a detector of its output signal, and is connected to an evaluation ci...

AI Technical Summary

Problems solved by technology

However, this solution is expensive and requires additional space for a second parallel system of sensors, detectors and evaluation circuits

Furthermore, due to the short length of the shaftless spinning rotor and due to the overall relatively small size of the spinning units in open-end spinning machines with active magnetic bearings, the shaftless spinning rotor length and spinning outside dimensions of the yarn unit, the necessary additional space cannot be obtained

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