Tauchfähige Halbaxiale Kreiselpumpe und Laufrad für eine Solche Pumpe

Details

Veröffentlichungs-Nr.

EP4760108

Anmeldetag

10. Dezember 2024

Veröffentlichung

17. Juni 2026

Rechtsraum

EP

IPC

F04D7/04, F04D13/08, F04D29/18

Abstract

The invention relates to a submersible semi-axial centrifugal pump (1) for installation in a column (2), and comprises an outer pump housing (7) and an inner pump core arrangement (14). The pump core arrangement comprises a drive unit (16), a semi-axial open centrifugal impeller (20) and a plurality of guide vanes (15) extending between and connecting the pump housing (7) and the drive unit (16), wherein the impeller (20) comprises a hub (28) and at least two spirally swept blades (29), wherein the hub (28) is essentially cone-shaped tapering towards the inlet (12) of the pump housing (7). Each blade (29) comprises a leading edge (31), a trailing edge (32) and a lower edge (33). The leading edge (31) of each blade (29) is swept backwards from an inner end (36) located at the hub (28) towards an outer end (37) located at the inner surface (11) of the pump housing (7), wherein a centre axis (A) of the impeller (20) is located at a relative radius R* equal to 0 and the outer end (37) of the leading edge (31) of each blade (29) of the impeller (20) is located at a relative radius R* equal to 1, and wherein a sweep angle (α) of the leading edge (31) is in the range 32 - 45 degrees at a first relative radius R*1 equal to 0,5, and in the range 47 - 60 degrees at a second relative radius R*2 equal to 0,95, and is continuously increasing from the first relative radius R*1 to the second relative radius R*2.

Anmelder

Firma

Xylem Europe GmbH

Land

🇨🇭 Schweiz