Ceramic step bearing in a centrifugal pump

US4874300A · kind A · utility

Inventors

• Karsten Laing · Althütte, DE
• Ludwig Ludin · Wohlen, CH
• Johannes Nikoleus Laing · Village of La Jolla, US

Key dates

• Filing date: Dec 21, 1987
• Grant date: Oct 17, 1989
• Expiry date: Dec 21, 2007

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16C2380/26
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A step bearing with spherical gliding surfaces having a stationary mounted ceramic ball mounted on a strut, on which a magnetic rotor with a concave cap is rotating under working conditions. During operation the rotor with the cap is pressed by magnetic thrust in the direction toward the strut, while a second annular bearing member of the rotor prevents axial movement of the cap when axial forces in the direction opposite to the direction of the magnetic forces become higher than the magnetic forces.