Bearing for a Heated Roll

摘要

A bearing for a heated calendar roll comprises a bearing ring having a first surface. The bearing is rotatable about an axis. A first radially fixed hydrostatic bearing arcuate segment has a first surface which mates with the first surface of the bearing ring. The hydrostatic bearing has at least one bearing pocket. The bearing pocket has a device for permitting hydraulic fluid to flow into the at least one bearing pocket. The hydrostatic bearing is disposed substantially at a circumferential position with respect to the bearing which corresponds to a bearing load from the calendar roll. A second hydrostatic bearing arcuate segment has a first surface which mates with the first surface of the bearing ring. The second hydrostatic bearing has a first radially adjustable bearing pocket. The radially adjustable bearing pocket has a device for permitting hydraulic fluid to flow into the radially adjustable bearing pocket. The second hydrostatic bearing is disposed substantially diametrically opposite to the first hydrostatic bearing. A running gap is formed between the first surface of the first hydrostatic bearing and the first surface of the bearing ring. The running gap has a gap height which varies from a middle of the running gap toward an edge of the running gap such that at the beginning of a heating cycle, the middle gap height is less than the edge gap height, and in a heated state of the calendar roll the middle gap height is greater than the edge gap height.