Radial impeller for fluid flow machines

US4752187A · kind A · utility

Assignee

• Klein, Schanzlin & Becker Aktiengesellschaft · DE

Inventors

• Peter Hergt · Ludwigshafen, DE
• Alexander Nicklas · Dirmstein, DE

Key dates

• Filing date: Nov 30, 1982
• Grant date: Jun 21, 1988
• Expiry date: Nov 30, 2002

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04D29/2205
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A radial impeller for use in centrifugal pumps wherein a reduction of the outer diameter entails a change in the total head but does not affect the capacity because the front coverplate of the impeller is inclined with reference to a plane that is normal to the impeller axis. The inclination of the outer marginal portion of the front coverplate with reference to such plane increases in response to decreasing outer diameter of the impeller. The specific speed of the impeller can be increased from approximately 11 to approximately 35 min.sup.-1 by reducing the outer diameters of the coverplates. The exit angles of the vanes are selected in such a way that they remain constant irrespective of the selected outer diameters of the coverplates within the range which is required to change the specific speed from 11 to 35.