Control for liquid ring vacuum pumps

US4655688A · kind A · utility

Assignee

• ITT Industries · US

Inventors

• Heinz Bohn · Lauenburg/Elbe, DE
• Werner Fink · Lüneburg, DE
• Reinhold Luhmann · Lüneburg, DE

Key dates

• Filing date: May 30, 1985
• Grant date: Apr 7, 1987
• Expiry date: May 30, 2005

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04C19/004
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A closed loop control is provided to control pressure and/or temperature in a system where one or more liquid ring vacuum pumps evacuate a recipient. The suction ability of the liquid ring vacuum pumps is controlled either by speed control, operating water temperature, switching-on and -off of pumps or bypass-air. Simultaneous control of all operating characteristics is achieved with a programmable electronic controller.