METHOD FOR CONTROLLING PAPER MACHINE nip rolls AND CONTROL ARRANGEMENT FOR PAPER MACHINE nip rolls

摘要

The invention is a method for controlling nip rolls (2, 20; 2 ', 20') of paper machines. In the method include the nip rolls (2, 20; 2 ', 20') at least a first roll (2, 2 ') and a counter-roller (20, 20') to form a press nip (N) between the first roller (2, 2 ') and the second roller (20, 20'), the first roller (2, 2 ') comprises a fixed support (3), a roll mantle (4) disposed around said supported by the hydrostatic bearing elements support (3) is rotatable, hydraulic actuators (6, 50) on the carrier (3) are arranged and is charged with which the roll shell (4) via a pressure medium, and at least one bearing element and / or at least a hydraulic actuator (6, 50) each with a regulating valve (8) for the rapid degradation of the hydraulic load. The control valve (8) is equipped with actuators (82, 83, 83a, 84, 85, 89, 90) which respond automatically to the rate of change of the load pressure. The invention is also a process-applying control arrangement.