摘要:
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.
摘要:
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.
摘要:
The invention relates to an electromagnetic device for eliminating a yarn loop during the process of winding yarn on a cross-wound bobbin on a spinning machine at a constant speed of the yarn production, which comprises a cylindrical two pole magnet (1), which is connected to a compensatory arm (5) of a yarn loop and which is mounted rotatably about its longitudinal axis between two pole pieces (20, 21) of a magnetic core (2) of a coil (4), which are situated opposite each other, whereby on the side remote from the cylindrical two-pole magnet (1) and the pole pieces (20, 21), the magnetic core (2) passes through the electrical coil (4) connected to a source of electrical energy and to a control device. The magnetic core (2) is interrupted in the cavity of the coil (4) and a two pole permanent magnet (3) is located at the point of its interruption.
摘要:
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.
摘要:
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.
摘要:
A magnetic bearing for the mounting of a shaft (7), in particular for a spinning rotor of an open-end spinning device, features several pole shanks (2) of a stator (1) for the active radial magnetic mounting of the shaft (7) in two degrees of freedom, which in each case are surrounded by a coil (6) and are radially arranged to each other, whereas the pole shanks (2) are arranged at each other in such a manner that they release an opening (4) for the shaft (7). In the area of the opening (4), and on the side of the coils (6) turned away from the opening (4), the pole shanks (2) are connected to each other. In particular, for the passive axial mounting of the shaft (7), at least one permanent magnet (10) is arranged between the coils (6) and the opening (4); this is in operative connection with the pole shanks (2). A shaft (7) for mounting with at least one corresponding magnetic bearing is a composite component, which at least partially consists of non ferromagnetic material. In the area of the radial and (if applicable) axial mounting, a component made of a ferromagnetic material is arranged. A shaft mounting, in particular for a rotatable shaft of a spinning rotor in an open-end spinning device, features, for the passive axial mounting of one degree of freedom of the shaft (7) and for the active radial mounting of two degrees of freedom of the shaft (7), at least one, preferably two, corresponding magnetic bearings.
摘要:
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.
摘要:
With a method for the safe starting and/or stopping a rotor of a rotor spinning machine for the production of yarn, with a multiple number of rotors, each of which rotates in a 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. A data connection of the motor is provided with a control unit, in order to drive the rotor in various operating states. There is a check of the control for driving the rotor, the position control for the one or more active magnetic bearings, the data connection for controlling the motor and/or the properly closed lid, and, in the event that predetermined target values and/or states are not met, the start of the rotor is blocked or the motor that is already running is selectively stopped. A rotor spinning machine is suitable for carrying out the method.