EP 1222393 A4 20021106 - SUBMERSIBLE MOTOR WITH SHAFT SEALS
Title (en)
SUBMERSIBLE MOTOR WITH SHAFT SEALS
Title (de)
TAUCHMOTOR MIT WELLENDICHTUNGEN
Title (fr)
MOTEUR SUBMERSIBLE DOTE DE BOITES D'ETANCHEITE
Publication
Application
Priority
- US 0026898 W 20000929
- US 15770299 P 19991004
Abstract (en)
[origin: WO0125634A1] A submersible electric motor driven pump has a motor chamber and a pump chamber separated by a seal chamber. Inboard and outboard shaft seals(MS1,MS2) immersed in an oil buffer fluid within the seal chamber restricts the flow of liquid from the seal chamber into the pump and motor chambers. An integral or externally mounted pre-pressurized buffer fluid reservoir (PA) maintains a positive fluid pressure in the seal chamber relative to the external pressure at working depth, and maintains a suitable buffer fluid level within the seal chamber, in order to prevent the ingress of the pumped media through the outboard seal(MS2). A unique impeller design (631) circulates fluid within the seal chamber in the region of the outboard shaft seal (MS2), allowing continuous dry run operation when used in conjunction with an integrally cooled motor design. A cartridge shaft sleeve subassembly, having a bearing (3) configured between the inboard and outboard seals (MS1,MS2), facilitates maintenance.
IPC 1-7
IPC 8 full level
F04D 13/08 (2006.01); F04D 29/10 (2006.01); H02K 7/14 (2006.01)
CPC (source: EP)
F04D 13/086 (2013.01); F04D 29/106 (2013.01); F04D 29/108 (2013.01)
Citation (search report)
- [XDY] US 2545422 A 19510313 - BLOM CARL J
- [YD] US 5938205 A 19990817 - AZIBERT HENRI V [US], et al
- [A] US 5211532 A 19930518 - THOMPSON PETER [GB]
- [A] US 4614482 A 19860930 - GAFFAL KARL [DE]
- [A] US 5007798 A 19910416 - KEANE BRIAN [AU]
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0125634 A1 20010412; AT E417201 T1 20081215; AU 7840800 A 20010510; CA 2385820 A1 20010412; CA 2385820 C 20100406; CN 1224782 C 20051026; CN 1377447 A 20021030; DE 60041076 D1 20090122; EP 1222393 A1 20020717; EP 1222393 A4 20021106; EP 1222393 B1 20081210; ES 2317852 T3 20090501; JP 2003529702 A 20031007; JP 4644406 B2 20110302; MX PA02003375 A 20040927
DOCDB simple family (application)
US 0026898 W 20000929; AT 00968505 T 20000929; AU 7840800 A 20000929; CA 2385820 A 20000929; CN 00813880 A 20000929; DE 60041076 T 20000929; EP 00968505 A 20000929; ES 00968505 T 20000929; JP 2001528341 A 20000929; MX PA02003375 A 20000929