Rotary piston pump with optimised inlets and outlets

US9617992B2 · kind B2 · utility

Assignee

• NETZSCH Pumpen & Systeme GmbH · DE

Inventors

• Stefan Weigl · Mühldorf a. Inn, DE
• Reinhard Denk · Dahme/Mark, DE
• Hisham Kamal · Waldkraiburg, DE
• Josef Strassl · Straubing, DE
• Robert Kurz · Aschheim, DE
• Bernhard Murrenhoff · Buchbach, DE
• Thomas Boehme · Waldkraiburg, DE
• Gunther Herr · Haarth, DE
• Franz Kneidl · Waldkraiburg, DE
• Mikael Tekneyan · Waldkraiburg, DE
• Matthias Gradl · Seßlach, DE
• Erwin Weber · Ampfing, DE
• Roger Willis · Mühldorf a. Inn, DE
• Stefan Kern · Frankfurt am Main, DE
• Johann Kreidl · Waldkraiburg, DE
• Marcel Verhoeven · Zedelgem, BE

Key dates

• Filing date: Nov 3, 2014
• Grant date: Apr 11, 2017
• Expiry date: Mar 28, 2035

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04C13/001
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A rotary piston pump for the delivery of liquids and for the delivery of liquids containing solids. The rotary piston pump includes a pump housing which is provided with an inlet and an outlet. The pump housing includes a lining. Disposed in the pump housing, or inside the lining, are at least two counter-rotating rotary pistons, which form pump spaces during their rotation. During the rotational movement, the rotary pistons are sealed against one another, against the pump housing and against the lining. Disposed in the pump housing and/or in the lining, in the spatial vicinity of the inlet and/or the outlet, are means with which the pulsation can be reduced or even completely prevented.