Steam-heated roller with cooling system
AssigneeSchwabische Huttenwerke GmbH
InventorHeinz-Michael Zaoralek
Life of this patent
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Abstract
A roller or roll heated by a gaseous heat carrier medium, preferably steam, having axially parallel peripheral passages for use in the pressing or smoothing station of paper making machines is connected to a device for the feeding and draining of the heat carrier medium so that for cooling the heated roller a cooling means is switched into the heating/cooling circuit and the direction of flow of the heat carrier medium may be reversed. Further aspects in accordance with the invention permit regulated cooling of the roller by blending heat carrier condensate into the return flow of heat carrier, by switching over between operation with a gaseous heat carrier and operation with a condensed heat carrier, as well as application of the invention in rollers having roller drive arranged on one flanged trunnion.
Claims12
A heatable roller or roll for a pressing or smoothing station of a paper making machine, including a roller body comprising at least one, peripheral passage or channel oriented substantially axially parallel to the roller body, at least one flanged trunnion and a gaseous heat carrier medium circulating in said passages or channels as well as at least one feed conduit for said heat carrier medium, at least one conduit for draining said heat carrier medium and the condensate thereof as well as a steam separator container (6) arranged at the end of said drain conduit, characterized in that a cooling apparatus (9) being one of a heat exchanger or a condenser having a condensate drain (12) connected to said feed conduit with means to regulate flow of said heat carrier medium into and out of said roll.
Dependencies are inferred from the claim text.