Centrifugal pump

US6343909B1 · kind B1 · utility

Assignee

• KSB Aktiengesellschaft · DE

Inventors

• Peer Springer · Schifferstadt, DE
• Wolfgang Kochanowski · Windesheim, DE
• Christian Haag · Assamstadt, DE
• Thomas Pensler · Frankenthal, DE

Key dates

• Filing date: Jan 2, 2001
• Grant date: Feb 5, 2002
• Expiry date: Jan 3, 2021

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04D29/183
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A centrifugal pump with an impeller which has a single helically-formed blade and which is not sensitive to sand abrasion or seizing of the impeller is achieved by providing the impeller (1) with a shielding plate (3) arranged on the suction side which transitions from an axial course given at the suction inlet of the impeller into a radial course, by providing that the blade entry angle (&bgr;1) in the area which is in danger of cavitation in the event of an abrupt onset of flow is at least 5° smaller than the angle of incident flow (&bgr;0), and thereafter the blade angle &bgr; in the axial region of a meridian section through the impeller (1) increases at least to the magnitude of the blade exit angle (&bgr;2), and finally a blade angle (&bgr;) exceeding the blade exit angle (&bgr;2) in the radial area of the meridian section decreases back down to the magnitude of the blade exit angle (&bgr;2).