Patent · US Active

Centrifugal pump having an arrangement for sealing

US11619238B2 · kind B2 · utility

0Cited by

17References

10Claims

0Family size

Assignee

KSB SE & Co. KGaA · DE

Inventors

Alexander Boehm · Dresden, DE
Stephan Braun · Kehlhof, CH
Stephan Bross · Frankenthal, DE
Holger Rauner · Bischofswerda, DE
Adrian Stein · Bischofswerda, DE
Tim Richter · Shanghai, CN

Key dates

Filing date	Apr 25, 2017
Grant date	Apr 4, 2023
Priority date	—
Expiry date	Oct 8, 2039

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04D29/426
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A sealing arrangement for a centrifugal pump is provided. The sealing arrangement permits a sealing gap between a rotating element such as a pump impeller and a non-rotating element such as a pump casing to be minimized, while protecting against element wear from gap reduction and element contact, particularly during transient operation such as pump start up. At least one of the rotating element and the non-rotating element is provided with a plurality of movably mounted bodies configured to rotate and maintain separate the rotating and non-rotating elements when the sealing gap is reduced. The elements and the bodies may be formed in an additive manufacturing process.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.