US 5,208,956 AGranted

Roll for use in calenders and like machines

AssigneeKleinewefers GmbH

InventorsReinhard Wenzel, Thomas Hermsen, Rolf Van Haag

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Abstract

A controlled deflection roll for use in calenders and like machines has a non-rotatable carrier for a hollow cylindrical shell the end portions of which are rotatable on bearings and the central portion of which surrounds hydraulically operated shell deforming elements. A first hydraulic circuit is provided to supply heated oil to the deforming elements, and a second hydraulic circuit serves to feed lubricant to the bearings. The two circuits are separated from each other by thermal barriers which are installed between the shell and the carrier intermediate the deforming elements and the bearings. Valves and/or flow restrictors are provided in the second circuit to vary the rate of feed of lubricant to and/or the flow of lubricant from the bearings. This renders it possible to establish a desired temperature profile along the full length of the peripheral surface of the shell.

Claims21

Dependent claims

A controlled deflection roll comprising a carrier;

a flexible rotary shell spacedly surrounding said carrier and having first and second end portions and a peripheral surface including first and second marginal sections surrounding the respective end portions of said shell and a main section between said marginal sections;
hydraulic shell deforming means disposed between said carrier and said shell radially inwardly of said main section and including at least one row of deforming elements;
first and second bearings disposed between said carrier and the respective end portions of said shell;
means for supplying a first liquid to said deforming elements whence the first liquid overflows into a space between said carrier and said shell;
means for feeding a second liquid to said bearings comprising a source of second liquid, means for conveying first and second main streams of second liquid from said source toward the respective bearings and means for dividing each of said main streams into a primary stream flowing to the respective bearing and a secondary stream flowing toward said deforming elements, said flow dividing means comprising a first annular component and an axially movable second annular component adjacent said first component and defining therewith at least one hydrostatic pocket which establishes a path for the respective secondary stream, each second component being acted upon and being biased against the respective first component by the respective main stream of second liquid, one annular component of each of said flow dividing means being rotatable with said shell and the other annular component of each of said dividing means being provided on said carrier;
and means for varying the rate of feed of said second liquid.

3 more elements

A controlled deflection roll comprising a carrier;

a flexible rotary shell spacedly surrounding said carrier and having first and second end portions and a peripheral surface including first and second marginal sections surrounding the respective end portions of said shell and a main section between said marginal sections;
hydraulic shell deforming means disposed between said carrier and said shell radially inwardly of said main section;
first and second bearings disposed between said carrier and the respective end portions of said shell;
means for supplying a first liquid to said deforming means;
means for feeding a second liquid to said bearings comprising a source of second liquid, means for conveying first and second main streams of second liquid from said source toward the respective bearings, and means for dividing each of said main streams into a primary stream flowing to the respective bearing and a secondary stream flowing toward said deforming means;
first and second sealing means provided between said carrier and the respective end portions of said shell axially outwardly adjacent the respective bearings, at least one of said sealing means including a first annular member rotatable with said shell and a second annular member provided on said carrier adjacent said first annular member, one of said annular members being movable relative to and being biased by second liquid against the other of said annular members, said feeding means further including means for conveying second liquid from said first and second bearings past and radially inwardly of the respective sealing means;
and means for varying the rate of feed of said second liquid.

4 more elements

Dependencies are inferred from the claim text.