Rotationsverdrängerpumpe

Details

Veröffentlichungs-Nr.

EP3889431

Aktenzeichen

EP20167088

Anmeldetag

31. März 2020

Veröffentlichung

20. Dezember 2023

Erteilung

20. Dezember 2023

Rechtsraum

EP

IPC

F04C2/12F04C18/16

Abstract

A rotary positive displacement pump (1) for pumping a fluid product. The pump (1) having a front side (17) and a rear side (18) and comprises a main body (2) providing rotational support to a pair of parallel, axially extending, shafts (4, 5) with gears (6, 7) in constant mesh condition, such that the pair of shafts (4, 5) are arranged to rotate in opposite directions. The pump further comprises a rotor case body (15) connected to a front side (13) of the main body (2) and having a stationary interior pumping cavity defined by an axial rear wall (20), a circumferential side wall (21), and a removable front cover (26), a fluid product inlet opening (30), a fluid product outlet opening (31), and a pair of cylindrical rotor case hubs (36, 37) extending from the rear wall (20), wherein each cylindrical rotor case hub (36, 37) receives internally one of the pair of shafts (4, 5). The pump further comprises a pair of rotors (23, 24), each having at least one rotor wing (32) and a rotor drive element (33) that is mounted torque proof on a rotor seat (34) at an end region of one of the pair of shafts (4, 5), wherein each of the pair of rotor seats (34) has an axial abutment surface (42) facing in an axial direction (10) towards a front side (17) of the pump (1) and a mounting surface (43) facing radially outwards, wherein the pump (1) further comprises a pair of fasteners (38), each being engaged with a mating section (39) at the end region of one of the pair of shafts (4, 5), and each exerting an axial clamping force on one of the rotor drive elements (33) against the axial abutment surface (42) of one of the rotor seats (34), and wherein the axial abutment surface (42) of each rotor seat (34) is located axially outside, towards a front side (17), of the associated hub (36, 37).

Anmelder

Firma

Alfa Laval Corporate AB

Land

🇸🇪 Schweden

Fachgebiete