Hydrodynamic working circuit with device for reducing air circulation losses

US4773513A · kind A · utility

Assignee

• J.M. Voith GmbH · DE

Inventors

• Berthold Herrmann · Heidenheim, DE
• Klaus Brosius · Heidenheim an der Brenz, DE
• Olaf Spitzer · Giengen an der Brenz, DE
• Rudolf Fetzer · Crailsheim, DE

Key dates

• Filing date: Dec 19, 1986
• Grant date: Sep 27, 1988
• Expiry date: Dec 19, 2006

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16D57/04
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

For the reduction of capacity losses and heating in hydrodynamic working circuits, especially retarders, caused by undesired air circulation in emptied condition, it is suggested to introduce a certain quantity of a blocking medium into the working chamber. This blocking medium may be operating fluid, air, or a mixture of both, and can be introduced radially from the inside, from the outside, or from the center. It forms a blocking film by rotation of the bladed rotor wheel, which substantially prevents the circulation of air from one bladed wheel to the other.