Measurement of rotary speed of spinning rotor, uses permanent magnet at rotor shaft support disk and ferromagnetic intermediate component bridging gap to receiver

摘要

To register the rotary speed of the spinning rotor of an open end spinner, without contact, a permanent magnet as a signal transmitter (24) is at the end side of a rotor shaft support disk and a pulse signal receiver (26) is at a mobile maintenance unit which is brought to the spinning station. A ferromagnetic intermediate component (30) bridges the gap between the signal transmitter (24) and pulse receiver (26). The ferromagnetic intermediate component (30) is fitted to the spinner assembly (31), at a swing housing section (42). The ferromagnetic intermediate component (30) is a strip of sheet metal, shaped to the contour (51) of the swing housing section (42), with a magnetic insulation against neighboring components. The pulse signal receiver (26) has a ferrous core (61,62) within a shrouding induction coil (63).