Roll with induction heating arrangement
AssigneeSulzer-Escher Wyss GmbH
InventorChristoph Link
Life of this patent
Estimating the term…
Abstract
In a roll with a roll shell or jacket which is rotatable about a support or beam, the inner side of the rotatable roll shell or jacket is heated by means of an induction coil which is operated at high frequency and provided, for example, at a support element. The heating is effected directly at the press or work nip or in the proximity thereof without substantial loss of energy and without the use of a thermo-sensitive hydraulic medium.
Claims13
A roll with a rotatable roll shell for processing a web of material by exerting a pressing force along at least one plane, comprising:
- a nonrotatable support;
- a rotatable roll shell rotatable about said nonrotatable support;
- the rotatable roll shell having an inner surface and an outer surface;
- at least one support element provided between said inner surface of the rotatable roll shell and said nonrotatable support, said at least one support element being movable relative to said nonrotatable support;
- said at least one support element supporting the rotatable roll shell with respect to said nonrotatable support;
- at least one heating device for heating said inner surface of the rotatable roll shell;
- said at least one heating device being provided with electric induction heating means;
- and
- said at least one heating device being arranged within the rotatable roll shell and affixed to and movable with said at least one support element adjacent said inner surface of the rotatable roll shell such that a substantially constant distance is maintained between said at least one heating device and said rotatable roll shell.
A roll with a rotatable roll shell for processing a web of material by exerting a pressing force along at least one plane, comprising:
- a nonrotatable support;
- a rotatable roll shell rotatable about said nonrotatable support;
- the rotatable shell having an inner surface and an outer surface;
- at least one support element provided between said inner surface of the rotatable roll shell and said nonrotatable support, said at least one support element being movable relative to said nonrotatable support;
- said at least one support element supporting the rotatable roll shell with respect to said nonrotatable support;
- at least two heating devices for heating said inner surface of the rotatable roll shell;
- said at least two heating devices being provided with electric induction heating means;
- said at least two heating devices being arranged within the rotatable roll shell and positioned at said at least one support element adjacent said inner surface of the rotatable roll shell;
- said at least one support element defining said at least one plane of pressing force;
- said roll including a web infeed side on one side of said at least one plane of pressing force and a web outlet side on the other side of said at least one plane of pressing force;
- one of said at least two heating devices being mounted at the web inlet side of said plane of pressing force;
- and
- the other of said at least two heating devices being mounted at the web outlet side of said plane of pressing force.
A roll with a rotatable roll shell for processing a web of material by exerting a pressing force along at least one plane, comprising:
- a nonrotatable support;
- a rotatable roll shell rotatable about said nonrotatable support;
- the rotatable roll shell having an inner surface and an outer surface;
- at least one support element provided between said inner surface of the rotatable roll shell and said nonrotatable support, said at least one support element being movable relative to said nonrotatable support;
- said at least one support element supporting the rotatable roll shell with respect to said nonrotatable support;
- at least one heating device for heating said inner surface of the rotatable roll shell;
- said at least one heating device being provided with electric induction heating means;
- said at least one heating device being arranged within the rotatable roll shell and positioned at said at least one support element adjacent said inner surface of the rotatable roll shell;
- said at least one heating device for heating the inner surface of the rotatable roll shell comprising an induction coil operated by means of high-frequency current;
- said induction coil having an axis;
- and
- said axis of said induction coil being directed toward the rotatable roll shell.
Dependencies are inferred from the claim text.