EP 4372230 A1 20240522 - PUMP AND HYDRAULIC UNIT FOR A PUMP

Title (en)

PUMP AND HYDRAULIC UNIT FOR A PUMP

Title (de)

PUMPE UND HYDRAULIKAGGREGAT FÜR EINE PUMPE

Title (fr)

POMPE ET UNITÉ HYDRAULIQUE POUR UNE POMPE

Publication

EP 4372230 A1 20240522 (EN)

Application

EP 22208076 A 20221117

Priority

EP 22208076 A 20221117

Abstract (en)

The invention relates to a hydraualic unit for a pump (1) configured for pumping liquid comprising solid matter, wherein the hydraulic unit comprises an channel impeller (8) and a housing (6) having an axial inlet (2) and a radial outlet (3), the housing (6) defining a volute (4) having a cutwater (16), a cutwater wedge angle (ω) and a cutwater angle (Y), wherein a smallest cross-sectional area of the volute (4) is located in an axial geometrical plane that comprises an axially extending center axis of the inlet (2) of the housing (6) and that extends radially outwards to an upstream end of the cutwater (16). The hydraulic unit is characterized in that in a radial geometrical plane that is perpendicular to an axially extending center axis of the inlet (2) of the housing (6) and that comprises the longest radius of the volute (4) at the smallest cross-sectional area of the volute (4), the cutwater wedge angle (ω) is equal to or greater than 80 degrees and equal to or less than 150 degrees, and the cutwater angle (Y) is equal to or greater than 15 degrees and equal to or less than 70 degrees.

IPC 8 full level

F04D 7/04 (2006.01); F04D 29/22 (2006.01); F04D 29/42 (2006.01)

CPC (source: EP)

F04D 7/04 (2013.01); F04D 29/225 (2013.01); F04D 29/428 (2013.01); F05D 2250/38 (2013.01)

Citation (applicant)

EP 1899609 A1 20080319 - ITT MFG ENTERPRISES INC [US]
EP 1891331 A1 20080227 - ITT MFG ENTERPRISES INC [US]

Citation (search report)

[XI] US 3447475 A 19690603 - BLUM ALBERT
[XI] FR 577051 A 19240830 - BUCHER GUYER AG MASCH
[XI] JP 2007270748 A 20071018 - SHIN MEIWA IND CO LTD

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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

Designated validation state (EPC)

KH MA MD TN

DOCDB simple family (publication)

EP 4372230 A1 20240522; WO 2024105142 A1 20240523

DOCDB simple family (application)

EP 22208076 A 20221117; EP 2023081997 W 20231116