EP 0952352 A3 20010530 - Thrust-balancing device
Title (en)
Thrust-balancing device
Title (de)
Achsschubausgleich
Title (fr)
Equilibrage de poussée axiale
Publication
Application
Priority
JP 10972098 A 19980420
Abstract (en)
[origin: EP0952352A2] A flow channel and pressure equalizing sections introduce a fluid having substantially no angular momentum into a thrust balance chamber of a thrust balance device. The introduction of this fluid reduces the angular momentum of the fluid in the thrust balance chamber, facilitating the discharge of fluid out of the thrust balance chamber through a variable orifice. The thrust balance chamber exerts a variable pressure onto a rear surface of an impeller of a centrifugal pump. This pressure prevents significant displacement of the impeller during pump operation. The result is a centrifugal pump having good thrust balance properties regardless of flow rate and impeller speed. <IMAGE>
IPC 1-7
IPC 8 full level
F04D 29/04 (2006.01); F04D 29/22 (2006.01)
CPC (source: EP KR)
F04D 29/0416 (2013.01 - EP); F04D 29/2266 (2013.01 - EP); F04D 29/66 (2013.01 - KR)
Citation (search report)
- [A] EP 0688955 A1 19951227 - KSB AG [DE]
- [A] DE 2105485 A1 19720406 - NIKKISO C LTD
- [A] US 5320482 A 19940614 - PALMER ALAN S [US], et al
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)
EP 0952352 A2 19991027; EP 0952352 A3 20010530; EP 0952352 B1 20041222; CN 1120937 C 20030910; CN 1232928 A 19991027; DE 69922729 D1 20050127; DE 69922729 T2 20051201; KR 100295011 B1 20010712; KR 19990083231 A 19991125; TW 406166 B 20000921
DOCDB simple family (application)
EP 99107770 A 19990419; CN 99105578 A 19990414; DE 69922729 T 19990419; KR 19990013435 A 19990416; TW 88105939 A 19990414