Pumpe und Hydraulikeinheit einer Pumpe

Details

Veröffentlichungs-Nr.

EP4102080

Aktenzeichen

EP21178301

Anmeldetag

8. Juni 2021

Veröffentlichung

1. Januar 2025

Erteilung

1. Januar 2025

Rechtsraum

EP

IPC

F04D29/44F04D29/42F04D29/22F04D7/04

Abstract

The invention relates to a hydraulic unit of a pump (1) configured for pumping liquid comprising solid matter, said hydraulic unit comprising a housing (6) and an impeller seat (5), said housing (6) having an axial inlet opening (2) and an outlet opening (3) and said impeller seat (5) having an axial inlet defined by an inlet wall (10), wherein the impeller seat (5) has an inlet radius (R) measured from an axially extending centre axis (A) to the circular intersection (11) between the inlet wall (10) and the upper surface (12) of the impeller seat (5), said impeller seat (5) comprising a guide pin (13) connected to and extending radially inwards from said inlet wall (10), the guide pin (13) having a tip radius (r) measured from the axially extending centre axis (A) to the radially innermost part of the guide pin (13), wherein an imaginary 15%-circle (23) is offset radially inwards from said circular intersection (11) fifteen percent of the difference between said inlet radius (R) and said tip radius (r), said housing (6) comprising a cut water (28), wherein a cut water line (29) is a radius of the impeller seat (5) tangent to the most downstream point of the cut water (28). The hydraulic unit is characterized in that the cut water line (29) is located downstream a radius of the impeller seat (5) that is perpendicular to the outlet opening (3), and in that a guide pin angle (µ) between the cut water line (29) and a radius of the impeller seat (5) intersecting a leading edge of the guide pin (13) at the 15%-circle (23), is equal to or more than 3 degrees and equal to or less than 25 degrees.

Anmelder

Firma

Xylem Europe GmbH

Land

🇨🇭 Schweiz

Fachgebiete