Method and apparatus for operating an open-end rotor spinning unit
US7111446B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 2005 |
| Grant date | Sep 26, 2006 |
| Priority date | — |
| Expiry date | May 19, 2025 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01H4/42
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
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 Pv, Gv 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.