Spinning rotor arranged in an electromagnetic bearing and drive system of an operating unit of an air spinning machine and method for its production

Abstract

The invention relates to a spinning rotor arranged in an electromagnetic bearing and drive system of an operating unit of an air spinning machine and a method for its production, the spinning rotor comprising two-sided openings arranged at one end of a hollow carrier (2) for spinning cup (1), arranged along the circumference of the carrier with a ferromagnetic ring (5) for the function of a magnetic bearing, and positioned in the cavity of the carrier with an annular permanent magnet (3) for the function of an electric drive, the permanent magnet Are multipole magnets or consist of several segments. The carrier is made of ferromagnetic material and is provided with an outer periphery (21) at its end where the spinning cup is mounted, next to the outer periphery a non-ferromagnetic ring (4) is arranged along the outer periphery of the carrier, while the ferromagnetic ring Next to the non-ferromagnetic ring is arranged along the outer periphery of the carrier. The carrier is preheated before installation of the permanent magnets, and the permanent magnets are cooled, whereby a mechanical bias is achieved between the carrier and the driving permanent magnets after the permanent magnets have been inserted into the carrier and the temperature has equalized to the environment.

Description

technical field [0001] The invention relates to a spinning rotor arranged in the electromagnetic bearing and drive system of the operating unit of the air spinning machine, comprising a spinning cup with openings on both sides installed at one end of a hollow carrier, arranged along the circumference of the carrier There is a ferromagnetic ring, which has the function of a magnetic bearing, and in the cavity of the carrier is positioned an annular permanent magnet, which is a multipole magnet or consists of several segments for the function of an electric drive. Background technique [0002] WO2008 / 080372 describes a spinning mechanism of an air spinning machine, including a spinning rotor coaxially mounted on radial electromagnetic bearings and electromagnetic functional components of the electromagnetic bearing and drive system for electromagnetic Active levitation and centering of the functional part, which is mounted displaceably and rotatably in the space between the st...

AI Technical Summary

Problems solved by technology

[0005] A disadvantage of this solution is the undefined position of the ferromagnetic ring against the pole piece of the radial electromagnetic bearing, which makes it difficult to achieve the required stiffness of the arrangement of the spinning rotor in the electromagnetic bearing

During the drawing of textile yarns with a large mass per unit length, and further due to the uneven distribution of negative pressure in the vicinity of the spinning rotor, the spinning rotor may vibrate during its operation, thereby affecting the spinning Negative impact on operation and power consumption

[0006] A second disadvantage is the relatively high elasticity of the non-ferromagnetic material used as the material of the carrier, which during installation cannot support the permanent magnets of the motor of the rotating electric drive with the carrier at high speeds of the spinning rotor. way preloaded, and thus compensate the impact of centrifugal force on the permanent magnet, whose tensile strength is limited

[0007] A third disadvantage is the varying width of the gap between the rotating and stationary parts of the system, which can cause turbulent airflow, which is undesirable in terms of energy consumption at high speeds

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