Pumping device for pumping liquids, comprising a centrifugal pump with a radially pumping pump wheel with a hollow center

Abstract

The invention relates to a pumping device for pumping liquids, comprising a centrifugal pump with a radially pumping pump wheel with a hollow center. A pumping device 101 is proposed to provide a device for pumping liquids with a centrifugal pump with a radially pumping pump wheel with a hollow center, said pump being equipped to remove accumulations of gas from the interior of the pump, with a centrifugal pump 110 with a radially pumping pump wheel 201 with a hollow center, a detecting device 120 for detecting the first operating parameter 510, a sensor 130 for measuring a second operating parameter 520 and a control unit 180 for controlling the centrifugal pump 110 which is connected to the pump 110, the detecting device 120 for detecting the first operating parameter 510 and to the sensor 130, During operation, the pump 110 may be assigned a value of the first operating parameter 510 at any point in time. The control unit 180 is also equipped so that it controls the operation of the pump 110 and can remove accumulations of gas from the hollow center of the pump 110 during liquid pumping operation of the pump 110 by operating the pump 110 in a first step for removal of gas such that at least the first operating parameter 510 of the pump 110 is varied over time t, so that the first operating parameter 510 assumes a series of different predetermined values, one after another, and meanwhile values of the second operating parameter 520 associated with the values of the first operating parameter 510 are recorded, local and/or global extreme values E of the previously recorded values of the second operating parameter 520 are determined in a second step for removal of gas; those values 510E of the first operating parameter 510 are determined in a third step for gas removal, these values being associated with the extreme values E of the second operating parameter 520 previously determined; in a fourth step for removal of gas, the pump 110 is operated so that it assumes one of the values of the first operating parameter 510 associated with the extreme values E of the second operating parameter 520 for a predetermined period of time T.

Dependencies are inferred from the claim text.