Rotary piston pump, method for fixing rotary pistons of a rotary piston pump and method for dismantling rotary pistons of a rotary piston pump

US10539136B2 · kind B2 · utility

Assignee

• NETZSCH Pumpen & Systeme GmbH · DE

Inventors

• Stefan Weigl · Mühldorf a. Inn, DE
• Franz Kneidl · Waldkraiburg, DE
• Thomas Schmitt · Wauwatosa, US
• Achim Dehnz · Söchtenau, DE
• Dominik Hindera · Winhöring, DE
• Mathias Obermaier · Waldkraiburg, DE
• Markus Rosam · Aschau am Inn, DE
• Erwin Weber · Ampfing, DE

Key dates

• Filing date: Nov 20, 2015
• Grant date: Jan 21, 2020
• Expiry date: Sep 7, 2036

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04C2230/70
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A method for fixing rotary pistons in a rotary piston pump and a method for dismantling rotary pistons of a rotary piston pump, where the rotary piston pump has two counter-rotating rotary arranged in a pump space on drive shafts. The rotary pistons each include a seating for the drive shafts. The respective drive shaft is arranged and fixed with an end region in the seating of the respective rotary piston. A diameter of the drive shafts in the end region can be widened elastically. In an operational state, in which the rotary pistons are arranged on the respective drive shafts, a frictional connection is formed between the respective seating of the rotary piston and the end region of the respective drive shaft.