Lubrication of a roll jacket of a press roller

A press roller comprising a stationary carrier,

• a roll jacket in the form of an endless loop which is rotatable around the stationary carrier;
• the roll jacket having an inside circumferential surface;
• a support element supported on the carrier, the support element including a support surface which faces outward of the support element, extends in the rotation direction of the roll jacket over the carrier, and is pressable toward the inside circumferential surface of the rotating roll jacket;
• the carrier and the support element where it is supported on the carrier together defining a pressure space below the support element for being pressurized with oil to press the support element toward the roll jacket;
• a plurality of lubricating oil feed points defined in the support surface for supplying lubricating oil to the region between the support surface and the inside circumferential surface of the roll jacket for hydrodynamically lubricating the roll jacket rotating over the support element;
• the oil feed points being separated from each other and arranged in at least one row that extends along the support surface generally in the direction of the press roller axis;
• an oil feed supplying fresh lubricating oil to the oil feed points at least partially independently of the pressure space which acts on the support element;
• each oil feed point comprising a respective local depression in the support surface and a respective bore in the support element located beneath and communicating into each of the depressions, with a throttle in the bore for controlling the feed of oil through the bore into the depression, so that upon rotation of the roll jacket over the carrier, the roll jacket is at least partially hydrodynamically lubricated by the lubricating oil from each depression;
• the depressions in the support surface being so profiled as to provide a continuous transition into the support surface and into the ridges between the oil feed points in the support surface at least at one side of the oil feed points in the rotation direction of the roll jacket;
• the support surface including a respective upstanding ridge between neighboring ones of the local depressions in the row of oil feed points, the ridges having outer surfaces which lie at least essentially on the same radial level as the regions of the support surface adjacent the ridges and regions of the support surface axially beyond the depressions;
• the continuous transition of the depressions is accomplished with a generally convex curvature of the support surface in the depressions.