Yarn guide roll
AssigneeBarmag AG
InventorHeiner Kudrus
Life of this patent
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Abstract
A roll for guiding at least one yarn in a yarn processing operation and comprising a tubular roll sleeve which is mounted for free rotation on a support by a plurality of bearings. At least one of the bearings is constructed as a radially operative magnetic bearing, which comprises a plurality of bearing pole windings distributed in the circumferential direction of the roll sleeve and which have predetermined pole cross sections. At least one of the bearing pole windings has a pole cross section which is larger or smaller than the pole cross sections of one or more of the other bearing pole windings, so as to permit the load profile imparted to the sleeve by a running yarn to be balanced over the circumference of the sleeve.
Claims15
A yarn guide roll for guiding at least one yarn on a circumferential surface thereof, comprising
- an elongate support which defines a central axis,
- a tubular roll sleeve,
- a plurality of bearings rotatably mounting said tubular roll sleeve upon the support for rotation about said central axis,
- at least one of said bearings comprising a radially operative magnetic bearing which comprises a plurality of bearing pole windings distributed about the circumference of the roll sleeve, with each bearing pole winding having a predetermined pole cross section, and wherein at least one of the bearing pole windings has a pole cross section which is larger or smaller than the pole cross section of at least one of the other bearing pole windings.
Dependencies are inferred from the claim text.