Roll magnetically compensated and/or controlled of its...

Details Roll magnetically compensated and/or controlled of its... Roll magnetically compensated and/or controlled of its...

D - Textiles, Paper

21

G

92/4

D21G 1/02 (2006.01) F16C 13/00 (2006.01)

Patent

CA 1172082

ABSTRACT OF THE DISCLOSURE A roller used as a press or calender roller in a paper machine is compensated for deflection and end-loaded. The roller has a stationary axle with spaced opposite ends at which the roller is loaded and a cylindrical shell rotatably mounted on the axle. The axle has a magnetic core portion within the shell having pole shoes spaced from the shell by air gaps and magnetiz- ing coils of electrical conductors thereon at corresponding ones of the pole shoes. The coils produce a manetomotive force and are positioned in a manner whereby magnetic flux passing throught the air gaps between the pole shoes and the shell creates a compensating force field between the shell and the magnetic core. The roller has an inner part of the shell consisting of a stack of sheets of magnetically well-conductive material separated from each other by electrical insulation thereby reducing eddy current losses.

399734

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