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1. (WO2018167031) CENTRIFUGAL PUMP AGGREGATE

Pub. No.:    WO/2018/167031    International Application No.:    PCT/EP2018/056187
Publication Date: Fri Sep 21 01:59:59 CEST 2018 International Filing Date: Wed Mar 14 00:59:59 CET 2018
IPC: F04D 1/00
F04D 13/06
F04D 15/00
F04D 29/42
F04D 29/48
Applicants: GRUNDFOS HOLDING A/S
Inventors: BLAD, Thomas
BLAD, Christian
Title: CENTRIFUGAL PUMP AGGREGATE
Abstract:
The invention relates to a hydraulic structural unit having: a centrifugal pump aggregate which has an electric drive motor (4, 6) and at least one impeller wheel (14) driven by the drive motor; and at least one valve element (18) which is arranged such that it can be moved by a flow of liquid caused by the impeller wheel (14), wherein at least one section (18; 78) of a wall which bounds a flow path in the hydraulic structural unit is movable, this movable section (18; 78; 86) of the wall is part of the valve element (18) or is connected to the valve element (18) in order to move the latter, and this movable section (18; 78; 86) can be moved, at least partially as a result of frictional forces, by the flow of liquid running along the wall.