METHOD FOR SUPPLYING A CHEMICAL OR CHEMICAL COMPOUND IN A FIBROUS WEB MACHINE AND AN APPARATUS FOR IMPLEMENTING THE METHOD

摘要

The invention relates to a method for supplying a chemical or chemical compound (L) in a fibrous web machine. In the method, the chemical or chemical compound (L) is supplied via at least two displacement pumps (1, 4) to a common supply line (11), through which the chemical or chemical compound (L) is supplied to the operating device (12) of the fibrous web machine. Each displacement pump (1, 4) has a corresponding electric actuator (2, 5). In the method, each electric actuator (2, 5) is equipped with a corresponding control drive (3, 6), the fibrous web machine is equipped with a measuring device (8; 8a, 8b) for determining the phase angles of at least the first and second actuators (2,5), a control signal based on the determined phase angle information is formed and transmitted to the first control drive (3), based on the control signal, the difference between the firs and second electric actuators (2, 5) is adjusted so as to be as desired. Between the first and second control drives (3, 6) is formed an electric synchronization signal for maintaining the difference between the phase angles first and second electric actuators (2, 5) as desired.