Laufradsitz mit einem Führungszapfen für eine Pumpe

Details

Veröffentlichungs-Nr.

EP3988795

Aktenzeichen

EP20203827

Anmeldetag

26. Oktober 2020

Veröffentlichung

31. Juli 2024

Erteilung

31. Juli 2024

Rechtsraum

EP

IPC

F04D7/04F04D29/42F04D29/70

Abstract

The invention relates to an impeller seat (5) for a pump, said impeller seat (5) having an inlet wall, wherein the impeller seat (5) has an inlet radius measured from an axially extending centre axis (A) to the circular intersection (11) between the inlet wall 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, the guide pin (13) having a tip radius 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), the impeller seat (5) comprising a feeding groove (14) arranged in the upper surface (12) of the impeller seat (5) and extending from the inlet wall (10) to the periphery of the impeller seat (5). The impeller seat (5) is characterized in that a groove inlet upstream edge line (34) is a radius of the impeller seat (5) intersecting an upstream edge (35) of the feeding groove (14) at said circular intersection (11), seen in the direction of rotation of the pump (1), wherein a groove inlet upstream edge angle (λ) between a radius of the impeller seat (5) intersecting an upstream edge of the guide pin (13) at the 15%-circle (23), seen in the direction of rotation of the pump (1), and the groove inlet upstream edge line (34) is equal to or less than 20 degrees and equal to or more than 0 degrees. The invention also relates to a pump comprising such an impeller seat.

Anmelder

Firma

Xylem Europe GmbH

Land

🇨🇭 Schweiz

Fachgebiete