Patent ID: 6595691
Filing Date: 2003-07-22
Classification: D21G,F16C

Abstract:
An arrangement for displacing a roll, which is hydrostatically journalled by its axle (1) on support structures and positionable in its working position by means of a bearing, through a rapid movement of the bearing out of its said working position, said journalling comprising at each end of the roll at least one loading element (2-4) pressurizable with a hydraulic medium and at least one support element (5), wherein the arrangement comprises a valve control piston (9), delivering a hydraulic medium required for the pressurization of said at least one loading element (2) and positioned in a valve cylinder (8), said control piston (9) being provided with a positioning valve (10) on the face of the control piston (9) pointing towards the loading element (2), the face of the control piston (9) opposite relative to the positioning valve (10) being coupled with a pressure line (LP) of the hydraulic system for focusing a holding pressure on the control piston (9), anda quick-action piston (13) for effecting the rapid movement, positioned in a quick-action cylinder (12), one face of said quick-action piston (13) being coupled with the pressure line (LP) for focusing a holding pressure on said quick-action piston (13), the opposite face of said quick-action piston being coupled with a quick-action pressure line (QR) extending to a pressurization side (28) of said at least one loading element, and that, in order to effect a rapid movement of the bearing, the quick-action cylinder (12) is adapted to remove a constant volume of hydraulic medium consistent with a desired rapid movement range from the pressurization side (28) of said at least one loading element (2), while a holding pressure in the pressure line (LP) acting on said pistons (9, 13) has been released.