Method and apparatus for operating an open-end rotor spinning unit
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United States of America Patent
Stats
-
Sep 26, 2006
Grant Date -
Dec 22, 2005
app pub date -
May 19, 2005
filing date -
Jun 16, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An open-end spinning unit, which comprises a spinning rotor 1 that rotates during the spinning operation at a high rotational speed in a closed rotor housing 2. The spinning rotor is rotated by an individual electric motor drive 18 and supported in a smoothly running bearing assembly. When the drive is disconnected and the rotor housing is properly closed by a cover element 8, the spinning rotor is biased and rotated by an airflow resulting from a vacuum prevailing in the rotor housing and the motor drive operates as a generator. At least one of the electric quantities P.sub.v, G.sub.v which develop during the generator operation of the drive 18 is monitored, and upon exceeding a threshold value which can only be attained when the cover element is properly closed, a signal S is generated and processed in a control unit 30 to cause the cover element 8 on the rotor housing 2 to be locked, and thereafter the drive 18 is connected to its electrical supply to rotate the rotor at high speed.
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