公开(公告)号：US09828999B2

公开(公告)日：2017-11-28

申请号：US14911935

申请日：2014-08-06

Applicant: XYLEM IP MANAGEMENT S.à r.l.

Inventor： Patrik Andersson ,  Stefan Ramström

IPC: F04D7/04 ,  F04D15/00 ,  F04D29/042 ,  F04D29/20 ,  F04D3/00 ,  F04D29/52

CPC classification number: F04D7/045 ,  F04D3/00 ,  F04D15/0033 ,  F04D29/042 ,  F04D29/20 ,  F04D29/528

Abstract: An impeller assembly and a pump for pumping a liquid, including a pump chamber and an impeller arranged to rotate in the pump chamber, the impeller being suspended in a lower end of an axially extending drive shaft unit, wherein the lower end of the drive shaft unit is received in a cylinder-shaped recess of the impeller, wherein the impeller is displaceable back and forth in the axial direction in relation to the drive shaft unit. The impeller further includes an axially extending hole that connects the cylinder-shaped recess and the pump chamber and that the drive shaft unit includes an axially extending pin that projects from the lower end of the drive shaft unit, wherein the pin is arranged in the hole.