Rieter Cz S.r.o.

Maschinenfabrik Rieter Ag

Rieter Ag

Milan Moravec

Jiri Sloupensky

Peter Dirnberger

Miroslav Stusak

Siegfried Silber

Andreas Josef Pröll

Bernd Bahlmann

Mario Maleck

Mathias Burchert

Markus Kuebler

Vladimir Kluson

Miroslav Stusák

Tomas Brozek

Petr Skvaril

Lubomír Fait

Hanspeter Kappeler

Tomás Brozek

Petr SEMRÁD

Ludovit Zvara

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.

Yarn return unit for returning a yarn as well as a workstation of a textile machine comprising a yarn return unit

An electromagnetic device for eliminating a yarn loop during winding of a yarn on a cross-wound bobbin on a spinning machine at a constant speed of the yarn production includes a cylindrical two pole magnet rotatably mounted about a longitudinal axis thereof. A compensatory arm is connected to the two pole magnet. A magnetic core includes two poles situated opposite of each other, with the cylindrical two pole magnet rotatable between the poles. A side of the magnetic core opposite from the two poles passes through a cavity of an electrical coil, wherein the magnetic core is interrupted in the cavity. A two pole permanent magnet is located at the point of the interruption of the magnetic core in the cavity of the electrical coil.

Electromagnetic device for eliminating a yarn loop when winding yarn on a cross-wound bobbin on a spinning machine at a constant speed of the yarn production

A bearing system and associated method of operation are provided to support a spinning rotor having a pot and a shaft of an open-end spinning device with two radial bearings and at least one axial support bearing, wherein at least one of the radial bearings is an active magnetic bearing. The axial support bearing is configured such that a magnetic bearing acts in opposition to one or both of an aerostatic air bearing or a mechanical starting element.

Method for supporting a spinning rotor and bearing system, spinning rotor and support bearings

A method is provide for the safe starting and/or stopping of a rotor of a rotor spinning machine for the production of yarn, the spinning machine having a multiple number of rotors that rotate in a respective rotor housing covered by a lid. Each rotor is driven by its own motor and is held in at least one radially and/or axially active magnetic bearing by means of a position controller. Each motor is in communication with a control unit through a data connection to control the rotor in various operating states. One or more of the following conditions is checked against predetermined target values or states: (1) control for the drive of the rotor; (2) position control for the active magnetic bearings; (3) data connection for controlling the motor. In the event that the predetermined target values or states are not met, start of the rotor is blocked or the motor that is already running is selectively stopped.

Method for the safe starting and/or stopping of a rotor of a rotor spinning machine and the rotor spinning machine

A magnetic bearing for the mounting of a shaft, in particular for a spinning rotor of an open-end spinning device, features several pole shanks of a stator for the active radial magnetic mounting of the shaft in two degrees of freedom, which in each case are surrounded by a coil and are radially arranged to each other, in such a manner that they define an opening for the shaft. In the area of the opening, the pole shanks are connected to each other. For the passive axial mounting of the shaft, at least one permanent magnet is arranged between the coils and the opening. The invention also includes a shaft for mounting with at least one corresponding magnetic bearing. The shaft is a composite component, which at least partially consists of non-ferromagnetic material. In the area of the radial and axial mounting, a component made of a ferromagnetic material is arranged. A shaft mounting is also provided and features, for the passive axial mounting of one degree of freedom of the shaft and for the active radial mounting of two degrees of freedom of the shaft, at least one, preferably two, corresponding magnetic bearings.

Magnetic bearing, shaft and shaft monitoring for a spinning rotor of an open-end spinning machine

A method for correcting variations of parameters of components of an active magnetic bearing and/or assembly of active magnetic bearing as a whole, the active magnetic bearing includes a memory (M) to store values of production and/or electrical and/or installation variations of at least one component of the active magnetic bearing and/or variations of the whole active magnetic bearing assembly and/or correction values formed from the variations, the memory (M), a control system and/or detectors (D) of output signal of sensors (A) of the position and/or the evaluation circuits being interconnected or interconnectable.

Method for correcting variations of parameters of components and/or of assembly of active magnetic bearing and active magnetic bearing for bearing rotating working means

A spinning unit and 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, in which the position of the spinning rotor () is detected by a system of sensors (A, B) and on basis of the detected changes in the position of the spinning rotor () is adjusted controlling of the active magnetic bearing in order to eliminate undesirable changes in the position of the spinning rotor () in the cavity of the active magnetic bearing. 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, wherein both radial shifting and inclination of the spinning rotor are each detected by at least two pairs of sensors of the distance of monitored surface of the spinning rotor, the pairs of sensors for detecting radial shifting of the spinning rotor detect changes of distances of the cylindrical wall of the spinning rotor from the sensors. The sensors (A, B) of the position of the spinning rotor () are grouped into pairs, whereby two pairs of sensors (A, A) for detecting of radial shifting of the spinning rotor () are arranged on the opposite sides of the spinning rotor () against the cylindrical wall () of the spinning rotor () and at the same time another two pairs of sensors (B, B) for detecting of inclination of the spinning rotor () are arranged on the opposite sides of the spinning rotor () against the wall () of the spinning rotor (), which is perpendicular to the rotation axis (OA) of the spinning rotor ().

Method for detecting changes of position of shaftless spinning rotor of open-end spinning machine in cavity of active magnetic bearing and spinning unit of open-end spinning machine with active magnetic bearing for bearing shaftless spinning rotor

Growing community of inventors

Usti nad Orlici, Czechia

Milan Moravec