Pressure processing roll
AssigneeVoith Sulzer Papiertechnik Patent GmbH
InventorsRolf Van Haag, Reinhard Wenzel
Life of this patent
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Abstract
Pressure processing roll with a roll jacket, the roll jacket rotatably mounted on a carrier by a bearing arrangement. The bearing arrangement has at least one hydrostatically supported bearing surface, which forms a gap with an opposing surface. A normal to the hydrostatically supported bearing surface, and therefore a normal force, has at least one axially oriented component. The bearing arrangement is acted upon by a predefined axially oriented force which substantially completely closes the gap in the absence of hydrostatic pressure in the hydrostatically supported bearing.
Claims21
A pressure processing roll having a rotating axis, comprising:
- a carrier;
- a roll jacket;
- a bearing arrangement that rotatably mounts the roll jacket on the carrier, the bearing arrangement having at least one hydrostatically supported bearing surface that forms a gap with an opposing surface, a normal force of said hydrostatically supported bearing surface having an axially oriented component in a direction of the rotating axis;
- and
- an axial pressure mechanism that applies a predetermined, axially oriented force on the bearing arrangement in the direction of said axis to substantially completely close the gap in the absence of hydrostatic pressure in said at least one hydrostatically supported bearing surface.
A pressure processing roll connectable to a hydraulic system, comprising:
- a substantially cylindrical roll jacket having a hollow interior;
- a carrier within said roll jacket, said carrier extending along a rotational axis of said roll jacket;
- a first bearing at one end of the roll jacket and connecting said carrier and said roll jacket, said first bearing having a first hydrostatic gap between two internal surfaces of said first bearing that are transverse to the rotational axis, said first hydrostatic gap hydrostatically supporting said one end of said roll jacket when pressurized by the hydraulic system;
- a second bearing at a remaining end of said roll jacket and connecting said carrier and said roll jacket, said second bearing having a second hydrostatic gap between two internal surfaces of said second bearing that are transverse to the rotational axis, said second hydrostatic gap hydrostatically supporting said remaining end of the roll jacket when pressurized by the hydraulic system;
- and
- a gap closing mechanism for applying pressure to said second bearing in a direction transverse to said rotational axis, to close said first and second hydrostatic gaps when said hydraulic pressure in said first and second hydrostatic gaps is lower than a predetermined pressure, said gap closing mechanism closing off said hollow interior of said roll jacket by closing said first and second hydrostatic gaps.
Dependencies are inferred from the claim text.