EP 2233749 A4 20121219 - PRESSURIZING CENTRIFUGAL PUMP
Title (en)
PRESSURIZING CENTRIFUGAL PUMP
Title (de)
ZENTRIFUGALDRUCKPUMPE
Title (fr)
POMPE CENTRIFUGE À PRESSION
Publication
Application
Priority
JP 2007074642 W 20071221
Abstract (en)
[origin: EP2233749A1] [PROBLEMS] To solve the problems of a conventional pressurizing centrifugal pump that an inner peripheral wall, the edge of an outlet, blades, etc. are damaged when a foreign substance is included into a subject fluid and that intense cavitation and a big noise such as a draining sound occurring at the tips of the blades and lowering of pump performance are caused by moving of the fluid through a small gap between the inner peripheral wall and the tips of the blades. [MEANS FOR SOLVING PROBLEMS] In the pressurizing centrifugal pump, the tip of a blade (12) is formed to be low by providing a level difference (36) in the direction of the center from the outer periphery of a blade plate (14) to make the outer periphery of the blade plate (14) close to the inner peripheral wall (11) of a case (4) to form a fluid control space (h) for controlling moving of the fluid to the rear side of the blade and to form a fluid passage space (H) accelerating the passage of the foreign substance (X) included in the fluid between the inner peripheral wall (11) and the tip of the blade (12).
IPC 8 full level
F04D 5/00 (2006.01); F04D 7/04 (2006.01); F04D 23/00 (2006.01); F04D 29/18 (2006.01); F04D 29/24 (2006.01); F04D 29/42 (2006.01); F04D 29/66 (2006.01); F04D 31/00 (2006.01)
CPC (source: EP US)
F04D 5/002 (2013.01 - EP US); F04D 5/008 (2013.01 - EP US); F04D 7/04 (2013.01 - EP US); F04D 23/008 (2013.01 - EP US); F04D 29/188 (2013.01 - EP US); F04D 29/2272 (2013.01 - EP US); F04D 29/2288 (2013.01 - EP US); F04D 29/2294 (2013.01 - EP US); F04D 29/242 (2013.01 - EP US); F05D 2250/51 (2013.01 - EP US)
Citation (search report)
- [Y] EP 1739310 A1 20070103 - YONEHARA GIKEN CO LTD [JP]
- [Y] GB 1402713 A 19750813 - LINTOTT ENG LTD
- [Y] US 6224323 B1 20010501 - MURASE SEIJI [JP], et al
- [Y] EP 0477650 A2 19920401 - HITACHI LTD [JP]
- [A] US 3915589 A 19751028 - VANDER LINDEN DALE B
- [A] JP 2005240628 A 20050908 - TSURUMI MFG
- See references of WO 2009081465A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 2233749 A1 20100929; EP 2233749 A4 20121219; CN 101903661 A 20101201; KR 20100097165 A 20100902; US 2011280718 A1 20111117; WO 2009081465 A1 20090702
DOCDB simple family (application)
EP 07851048 A 20071221; CN 200780101983 A 20071221; JP 2007074642 W 20071221; KR 20107013332 A 20071221; US 80877311 A 20110802