Pumpe zum Pumpen Feststoffhaltiger Flüssigkeiten

Details

Veröffentlichungs-Nr.

EP4814311

Anmeldetag

27. März 2025

Veröffentlichung

30. September 2026

Rechtsraum

EP

Abstract

The invention relates to a pump for pumping liquid comprising solid matter. The pump comprises a hydraulic unit that comprises an impeller seat (5) and an open impeller (7), wherein the open impeller (7) has at least one spirally swept blade (12) having a leading edge (13), a trailing edge and a lower edge (15), wherein the impeller seat (5) comprises a guide pin (22) extending radially inwards, wherein the leading edge (13) of the blade (12) is configured to cooperate with the guide pin (22) of the impeller seat (5) during operation of the pump (1), and wherein an axially extending centre axis (A) of the impeller seat (5) is located at a relative radius R* equal to 0 and a circular intersection (20) between the inlet wall (19) and the upper surface (21) of the impeller seat (5) is located at a relative radius R* equal to 1. The pump is characterized in that a shearing angle (α) between a projected tangent (26) to the leading edge (23) of the guide pin (22) and a projected tangent (27) to the intersection between the leading edge (13) of the blade (12) and the pressure side (17) of the blade (12), between a first relative radius R1 equal to 0,35 and a second relative radius R2 equal to 0,95, is alternating between a major-value range and a minor-value range upon rotation of the impeller (7) in relation to the impeller seat (5), the minor-value range being limited by a lower value that is equal to or more than -30 degrees and an upper value that is equal to or less than 30 degrees and the major-value range being limited by a lower value that is equal to or more than 70 degrees and an upper value that is equal to or less than 100 degrees, wherein transition from the major-value range to the minor-value range occur at least two times.

Anmelder

Firma

Xylem Europe GmbH

Land

🇨🇭 Schweiz