EP 2786021 A2 20141008 - WET-ROTOR MOTOR PUMP
Title (en)
WET-ROTOR MOTOR PUMP
Title (de)
NASSLÄUFER-MOTORPUMPE
Title (fr)
MOTOPOMPE DE COMPTEUR HYDRAULIQUE
Publication
Application
Priority
- DE 102011119626 A 20111129
- EP 2012004852 W 20121123
Abstract (en)
[origin: WO2013079179A2] The invention relates to a wet-rotor motor pump comprising a can which separates the stator from the motor shaft that is mounted in the can and carries rotor laminations, said motor shaft projecting into the pump chamber and carrying, in said pump chamber, the impeller. A coaxial annular space is provided between a separating wall separating the can interior from the pump chamber and the rear of the impeller, the pumped liquid flowing from the annular space into the rotor space surrounded by the can through at least one flow passage in the separating wall, and flowing back to the pump chamber once it has permeated the rotor space, especially through the longitudinal hollow space of the motor shaft. The rear of the impeller has a coaxial annular projection that separates the rear annular space surrounding the motor shaft from the rest of the pump chamber, apart from at least one throttle gap extending through the annular projection. Pumped liquid flows from the pump pressure side into the annular space through the throttle gap in a throttled manner, said annular space being connected to the pump intake side by at least one throttled opening in the rear wall of the impeller and/or in the wall of the hollow shaft of the motor.
IPC 8 full level
F04D 13/06 (2006.01); F04D 29/16 (2006.01)
CPC (source: EP)
F04D 13/0613 (2013.01); F04D 29/167 (2013.01); F05D 2240/61 (2013.01)
Citation (search report)
See references of WO 2013079179A2
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
DE 102011119626 A1 20130529; CN 103998787 A 20140820; CN 103998787 B 20171117; EP 2786021 A2 20141008; EP 2786021 B1 20200212; WO 2013079179 A2 20130606; WO 2013079179 A3 20131227; WO 2013079179 A4 20140213
DOCDB simple family (application)
DE 102011119626 A 20111129; CN 201280062017 A 20121123; EP 12818777 A 20121123; EP 2012004852 W 20121123