A method is provided for identifying a spinning rotor on a rotor spinning machine, wherein the spinning rotor is mounted in a suspended manner in a radially acting magnetic bearing during a spinning operation. At least one system variable that varies between different spinning rotors is identified. The system variable is detected and compared to at least one reference value. The system variable is one or a combination of: an energy consumption of the magnetic bearing; a radial position of the spinning rotor; or a resonant frequency of the spinning rotor. A rotor spinning machine that carries out the method is also provided.

A method is provided for identifying a spinning rotor on a rotor spinning machine, wherein the spinning rotor is mounted in a suspended manner in a radially acting magnetic bearing during a spinning operation. At least one system variable that varies between different spinning rotors is identified. The system variable is detected and compared to at least one reference value. The system variable is one or a combination of: an energy consumption of the magnetic bearing; a radial position of the spinning rotor; or a resonant frequency of the spinning rotor. A rotor spinning machine that carries out the method is also provided.

An open-end spinning device for an open-end spinning machine includes a rotor housing and a spinning rotor having a rotor cup accommodated in the rotor housing. A drive for the spinning rotor is arranged in a drive housing. At least one receptacle for a cover element that closes the rotor housing during spinning operations is provided. The rotor housing includes an adjustable stop for the cover element, the stop positioning the cover element in an axial direction of the spinning rotor.

An open-end spinning device for an open-end spinning machine includes a rotor housing and a spinning rotor having a rotor cup accommodated in the rotor housing. A drive for the spinning rotor is arranged in a drive housing. At least one receptacle for a cover element that closes the rotor housing during spinning operations is provided. The rotor housing includes an adjustable stop for the cover element, the stop positioning the cover element in an axial direction of the spinning rotor.

An open-end spinning device for an open-end spinning machine includes an individually drivable spinning rotor having a rotor cup accommodated in a rotor housing. An individual drive for the spinning rotor arranged in a drive housing. A receptacle for a cover element that closes the rotor housing during spinning operations is provided. The rotor housing defines a central support part fixable to a machine frame of the open-end spinning machine. The rotor housing is formed as one piece with the drive housing and the receptacle for the cover element.

An open-end spinning device for an open-end spinning machine includes an individually drivable spinning rotor having a rotor cup accommodated in a rotor housing. An individual drive for the spinning rotor arranged in a drive housing. A receptacle for a cover element that closes the rotor housing during spinning operations is provided. The rotor housing defines a central support part fixable to a machine frame of the open-end spinning machine. The rotor housing is formed as one piece with the drive housing and the receptacle for the cover element.

An open-end spinning device having a thread draw-off nozzle and a thread draw-off nozzle for an open-end spinning device, the thread draw-off nozzle having a thread-guiding surface which extends between an entry opening and a draw-off opening and which tapers in the shape of a funnel toward the draw-off opening. In order to provide a thread draw-off nozzle and an open-end spinning device having a thread draw-off nozzle which allows controlled production of the thread, the thread draw-off nozzle has a blocking element, which protrudes from the thread-guiding surface and which has a thread stop surface designed such that the thread stop surface blocks a thread from circulating over the thread-guiding surface.

A method for operating a spinning device of a rotor spinning machine, and associated rotor spinning machine are provided in which a spinning rotor includes a rotor cup and a rotor shaft that is set into rotation with the aid of a drive situated in a drive housing. The drive is operatively connected to the rotor shaft, and the rotor shaft is supported in the drive housing by a bearing. The rotor cup is situated in a rotor housing to which vacuum is applied, and the rotor shaft extends between the drive housing and the rotor housing through a connection opening such that when a vacuum is drawn in the rotor housing during a spinning process, a vacuum is also drawn in the drive housing. Compressed air is feed into the drive housing via an air inlet at intervals to clean one or both of the drive housing and the bearing.

A method for operating a spinning device of a rotor spinning machine, and associated rotor spinning machine are provided in which a spinning rotor includes a rotor cup and a rotor shaft that is set into rotation with the aid of a drive situated in a drive housing. The drive is operatively connected to the rotor shaft, and the rotor shaft is supported in the drive housing by a bearing. The rotor cup is situated in a rotor housing to which vacuum is applied, and the rotor shaft extends between the drive housing and the rotor housing through a connection opening such that when a vacuum is drawn in the rotor housing during a spinning process, a vacuum is also drawn in the drive housing. Compressed air is feed into the drive housing via an air inlet at intervals to clean one or both of the drive housing and the bearing.

A wound dressing for use in vacuum wound therapy comprising a wound contact layer which is an open structure comprising a yarn comprising gel-forming filaments or fibres, the structure having a porosity which allows exudate to flow through it.