Patent · US Active

Sealing system for centrifugal pumps

US8870521B2 · kind B2 · utility

2Cited by

8References

18Claims

0Family size

Assignee

KSB Aktiengesellschaft · DE

Inventors

Bernhard Brecht · Hamburg, DE
Uwe Bruhns · Osthofen, DE
Frank Sehr · Birkenheide, DE

Key dates

Filing date	Dec 2, 2011
Grant date	Oct 28, 2014
Priority date	—
Expiry date	Dec 2, 2031

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04D29/5893
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A centrifugal pump for delivering hot fluids, having a contacting shaft seal, a seal housing (13) for the shaft seal (14), and a return line (8) for a partial flow of the delivered fluid, in which no delivered fluid is discharged out of the seal housing (13); a separate housing cover (9) is disposed between the seal housing (13) and the pump housing (1); there is a contact surface which minimizes heat transfer between the seal housing (13) and the housing cover (9); and the return line (8) is connected to the housing cover (9) and/or to the pump housing (1).

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