Method to determine the pressure loss and the flow rate through a pump

摘要

The pressure/flow determination involves an axial magnetic bearing for a pump rotor (1) on which axial forces operate during the operation of the pump, which are measured by determining the axial displacement of the rotor. These displacements are measured at different angular rotor speeds and stored in a lookup table, from which pressure and/or flow are determined. The displacement is measured via magnetic field sensors (S1-S4) which determine the changes in the flux between a stator (2) having teeth (20), and the rotor which has a ring magnet (10).