ARRANGEMENT FOR CONTROLLING PRESSURE MEDIUM

摘要

An arrangement for controlling pressure medium in accordance with the sequence of a fibre-web machine, in which the fibre-web machine is arranged to form or handle a fibre-web reel, whereby the sequence comprises a high volume flow transfer motion and a low volume flow process motion of pressure medium operated actuators of the fibre-web machine, whereby the pressure and volume flow of pressure medium are produced by a pressure medium power unit (1). The pressure medium power unit (1) comprises as the power source an electric motor (10i) which is arranged controllable by an inverter (31) the control sequence of which is connected to the control sequence of the fibre-web machine such that the control of the pressure and volume flow of the pressure medium power unit (1) is predictable in accordance with the sequence of the fibre-web machine.