EP 1519053 A2 20050330 - A submerged pump having a bearing lubricated by discharged fluid
Title (en)
A submerged pump having a bearing lubricated by discharged fluid
Title (de)
Tauchpumpe mit fluidgeschmierter Lagervorrichtung
Title (fr)
Pompe immergée avec pallier lubrifié par le fluide refoulé
Publication
Application
Priority
JP 2003338540 A 20030929
Abstract (en)
A target fluid discharged from a pump (12) is partially diverted, by a lead-in duct (58), into a housing chamber (49) including a motor (32) therein. A top bearing (50) supporting a motor shaft (36) is placed in the lead-in duct (58), and lubricated by the target fluid flowing through the lead-in duct (58). A top seal (60) is installed downstream from the top bearing (50) in the lead-in duct (58). The top seal (60) has a slight gap from the motor shaft (36) to form a throttle structure which increases a flow resistance. The throttle structure maintains a pressure in an area near the top bearing (50), to thereby suppress presence of gases.
IPC 1-7
IPC 8 full level
F04D 7/02 (2006.01); F04D 13/08 (2006.01); F04D 29/04 (2006.01); F04D 29/046 (2006.01); F04D 29/049 (2006.01); F04D 29/06 (2006.01); F04D 29/58 (2006.01)
CPC (source: EP US)
F04D 29/049 (2013.01 - EP US); F04D 29/061 (2013.01 - EP US); F04D 29/588 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE FR GB LI
DOCDB simple family (publication)
EP 1519053 A2 20050330; EP 1519053 A3 20090408; JP 2005105897 A 20050421; JP 4300088 B2 20090722; US 2005069434 A1 20050331
DOCDB simple family (application)
EP 04023215 A 20040929; JP 2003338540 A 20030929; US 95412004 A 20040929