公开(公告)号：US20190323513A1

公开(公告)日：2019-10-24

申请号：US16470876

申请日：2017-12-15

Applicant: GRUNDFOS HOLDING A/S

Inventor： Brian LUNDSTED POULSEN ,  Lasse SØGAARD LEDET

IPC: F04D29/16 ,  F04D17/08

Abstract: A centrifugal pump includes at least one pump stage, with a rotatable impeller (5) with a suction port (6) which is sealed with respect to a stationary pump part (1) by way of a sealing arrangement. The sealing arrangement includes a sealing ring (9) between the impeller (5) and the stationary pump part (1). The sealing arrangement is configured such that at least on delivery operation of the pump, the sealing arrangement has sealing sections which are distanced to the counter sealing surface and sealing sections which bear on the counter sealing surface, in an alternatingly successive manner considered in the peripheral direction of the sealing ring (9).