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1. (US20120148384) Pump having an axial balancing device

Office : United States of America
Application Number: 13143616 Application Date: 08.01.2010
Publication Number: 20120148384 Publication Date: 14.06.2012
Grant Number: 09109606 Grant Date: 18.08.2015
Publication Kind : B2
Prior PCT appl.: Application Number:PCTFR2010050027 ; Publication Number: Click to see the data
IPC:
F04D 29/042
F04D 29/22
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
D
NON-POSITIVE-DISPLACEMENT PUMPS
29
Details, component parts, or accessories
04
Shafts or bearings, or assemblies thereof
042
Axially shiftable rotors
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
D
NON-POSITIVE-DISPLACEMENT PUMPS
29
Details, component parts, or accessories
18
Rotors
22
specially for centrifugal pumps
Applicants: Sébastien Boufflert
SNECMA
Nicolas Juhel
Patrice Fayolle
Stéphane Laffite
Inventors: Sébastien Boufflert
Nicolas Juhel
Patrice Fayolle
Stéphane Laffite
Agents: Preti Flaherty Beliveau & Pachios LLP
Priority Data: 09 50107 09.01.2009 FR
Title: (EN) Pump having an axial balancing device
Abstract: front page image
(EN)

The pump includes a stator and a rotor having an impeller in which a fluid duct passes. An axial balancing device arranged on this wheel includes a rear balancing chamber and a passage arranged between the wheel and the stator, enabling evacuation of fluid from the fluid duct to the balancing chamber. The pressure of fluid in the balancing chamber compensates the pressures exerted by the fluid on the rest of the rotor allowing axial balancing of the rotor. The passage includes an upstream nozzle and a downstream nozzle, as well as an intermediate annular chamber, arranged between walls of the wheel and of the stator, the intermediate chamber being arranged downstream of the upstream nozzle and upstream of the downstream nozzle.


Also published as:
EP2376789JP2012514713CN102272457RU2011130704RU0002539954FR2941019
WO/2010/079309