EP 2949943 A1 20151202 - LOW TURBULENCE CENTRIFUGAL PUMP IMPELLER WHEREIN THE DOWNSTREAM PART OF THE BLADES EXTENDS CIRCUMFERENTIALLY
Title (en)
LOW TURBULENCE CENTRIFUGAL PUMP IMPELLER WHEREIN THE DOWNSTREAM PART OF THE BLADES EXTENDS CIRCUMFERENTIALLY
Title (de)
TURBULENZARMES RADIALPUMPE-FLÜGELRAD WOBEI SICH DAS STROMABWÄRTIGE ENDE DER SCHAUFELN IN UMFANGSRICHTUNG ERSTRECKT
Title (fr)
ROUET DE POMPE CENTRIFUGE À FAIBLE TURBULENCE DANS LEQUEL LA PARTIE AVAL DES AUBES S'ÉTEND CIRCONFÉRENTIELLEMENT
Publication
Application
Priority
TW 103118262 A 20140526
Abstract (en)
A low-turbulence impeller for a fluid pump comprises a first base wall (2), a second base wall (3), multiple guiding blades (4), multiple back-up plates (5), and multiple runners (6). The second base wall (3) has an inlet (33) formed through the second base wall (3). Each runner (6) is formed between two adjacent guiding blades (4). Each runner (6) has an outlet (60) formed between two adjacent back-up plates (5), a laminar zone (61) communicating with a corresponding outlet (60) and a turbulent zone (62) aligning with the corresponding back-up plate (5). The fluid can only be flowed out of the outlet (60) from the laminar zone (61), such that the fluid through the outlet (60) of each runner (6) is in low-turbulence condition. The cavitation corrosion is greatly reduced. The rotational velocity is enhanced to promote the fluid-draining efficiency.
IPC 8 full level
F04D 29/22 (2006.01); F04D 29/24 (2006.01); F04D 29/66 (2006.01)
CPC (source: EP US)
F01D 5/141 (2013.01 - US); F04D 29/2272 (2013.01 - EP US); F04D 29/242 (2013.01 - EP US); F04D 29/669 (2013.01 - EP US); F05D 2240/304 (2013.01 - EP US)
Citation (search report)
- [X] DE 1152887 B 19630814 - ROTH CO ROY E
- [XY] GB 954369 A 19640408 - ECK BRUNO [DE]
- [Y] US 1030561 A 19120625 - BLACKMER ERNEST E [US], et al
- [I] US 3751179 A 19730807 - WASSMANN W
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DE 202015102491 U1 20150904; EP 2949943 A1 20151202; JP 3199013 U 20150730; TW 201441489 A 20141101; US 2015337665 A1 20151126
DOCDB simple family (application)
DE 202015102491 U 20150513; EP 15168591 A 20150521; JP 2015002525 U 20150522; TW 103118262 A 20140526; US 201514710681 A 20150513