Centrifugal pump and method for compensating the axial thrust in a centrifugal pump

摘要

A centrifugal pump is proposed having a pump housing (2) which has an inlet (21) and an outlet (22), a rotor (3) having a front side (31) facing the inlet (21) and a rear side (32) remote from the inlet (21), and wherein the rotor (3) has a first pump wheel (4) having first vanes (41) for the generation of a main flow from the inlet (21) to the outlet (22), wherein a second pump wheel (5) having second vanes (52) and having at least one relief bore (6) is provided at the rotor (3) for the generation of a recirculation flow which is directed from the rear side (32) of the rotor (3) through the at least one relief bore (6) and wherein a partition element (7), which separates the recirculation flow at least partly from the main flow in the region of the second pump wheel (5), is provided between the two pump wheels (4, 5). A method for the compensation of the axial thrust in a centrifugal pump is furthermore proposed.

主权项

1. A centrifugal pump, comprising:
a pump housing comprising an inlet and an outlet; a rotor having a front side facing the inlet and a rear side remote from the inlet, wherein the rotor further comprises:
a first pump wheel comprising first vanes configured to generate a main flow from the inlet to the outlet, further comprising a first axis, anda second pump wheel comprising second vanes and at least one relief bore, wherein the second vanes and the relief bore are configured to generate a recirculation flow which is directed from the rear side of the rotor through the relief bore, the second pump wheel further comprising a second axis; and a partition element, disposed between the first pump wheel and the second pump wheel, wherein the partition element defines a barrier, extending in a plane transverse to the first axis and the second axis, between the first pump wheel and the second pump wheel, to thereby separate the recirculation flow at least partly from the main flow.