Centrifugal pump and method for compensating the axial thrust in a centrifugal pump
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United States of America Patent
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Aug 25, 2015
Grant Date -
Jan 6, 2011
app pub date -
Jun 22, 2010
filing date -
Jul 6, 2009
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Abstract
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.
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