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1. (WO2010079309) PUMP HAVING AN AXIAL BALANCING DEVICE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2010/079309 International Application No.: PCT/FR2010/050027
Publication Date: 15.07.2010 International Filing Date: 08.01.2010
IPC:
F04D 29/22 (2006.01) ,F04D 29/042 (2006.01)
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
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
Applicants:
SNECMA [FR/FR]; 2 boulevard du Général Martial Valin F-75015 Paris, FR (AllExceptUS)
BOUFFLERT, Sébastien [FR/FR]; FR (UsOnly)
JUHEL, Nicolas [FR/FR]; FR (UsOnly)
FAYOLLE, Patrice [FR/FR]; FR (UsOnly)
LAFFITE, Stéphane [FR/FR]; FR (UsOnly)
Inventors:
BOUFFLERT, Sébastien; FR
JUHEL, Nicolas; FR
FAYOLLE, Patrice; FR
LAFFITE, Stéphane; FR
Agent:
BARBIN LE BOURHIS, Joël; Cabinet BEAU DE LOMENIE 158 rue de l'Université F-75340 Paris Cedex 07, FR
Priority Data:
095010709.01.2009FR
Title (EN) PUMP HAVING AN AXIAL BALANCING DEVICE
(FR) POMPE A DISPOSITIF D'EQUILIBRAGE AXIAL.
Abstract:
(EN) The pump of the invention includes a stator (112) and a rotor comprising an impeller through which a fluid stream (114) passes. An axial balancing device provided on said impeller (111) comprises a rear balancing chamber (118) and a passage (120) which are provided between the impeller (111) and the stator (112), thus enabling the discharge of fluid from the fluid stream (114) to the balancing chamber (118). Fluid pressure in the balancing chamber (118) compensates for the pressures exerted by the fluid onto the rest of the rotor (111), thus enabling the axial balance of the rotor. The passage (120) comprises an upstream nozzle (140), a downstream nozzle (160), and an intermediate annular chamber (150) which are provided between the walls (151, 152; 141, 142; 161, 162) of the impeller (111) and the stator (112), the intermediate chamber being provided downstream from the upstream nozzle (140) and upstream from the downstream nozzle (160).
(FR) La pompe comprend un stator (112) et un rotor comportant une roue à aubes dans laquelle passe une veine de fluide (114). Un dispositif d'équilibrage axial aménagé sur cette roue (111) comporte une chambre d'équilibrage arrière (118) et un passage (120) aménagés entre la roue (111) et le stator (112), permettant l'évacuation de fluide depuis la veine de fluide (114) jusqu'à la chambre d'équilibrage (118). La pression de fluide dans la chambre d'équilibrage (118) compense les pressions exercées par le fluide sur le reste du rotor (111) permettant l'équilibrage axial du rotor. Le passage (120) comporte un ajutage amont (140) et un ajutage aval (160), ainsi qu'une chambre annulaire intermédiaire (150), aménagés entre des parois (151,152;141,142;161,162) de la roue (111) et du stator (112), la chambre intermédiaire étant aménagée en aval de l'ajutage amont (140) et en amont de l'ajutage aval (160).
front page image
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: French (FR)
Filing Language: French (FR)
Also published as:
EP2376789JP2012514713US20120148384CN102272457RU2011130704RU0002539954
FR2941019