Patent · US Active

Process fluid lubricated pump

US11846297B2 · kind B2 · utility

2Cited by

4References

17Claims

0Family size

Assignee

Sulzer Management AG · CH

Inventors

Karel DE RAEVE · Winterthur, CH
Simon Gassmann · Zürich, CH
Thomas Welschinger · Radolfzell, DE
Benedikt Trottmann · Sankt Gallen, CH

Key dates

Filing date	Mar 23, 2021
Grant date	Dec 19, 2023
Priority date	—
Expiry date	Sep 27, 2041

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16C2300/34
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A process fluid lubricated pump includes a pump having a pump shaft extending from a drive end to a non-drive end, first and last stage impellers, a drive unit exerting torque on the drive end to rotate the pump shaft, a balance drum connected to the pump shaft between the pump and the drive end, the balance drum defining a drum front side facing the pump and a drum back side, a relief passage between the balance drum and a first stationary part configured to be stationary with respect to a housing, the relief passage extending from the drum front side to the drum back side, the pump shaft radially supported in a non-contacting manner during operation of the pump, and a hydrodynamic radial pump bearing supporting the pump shaft, the radial pump bearing arranged at the non-drive end or at the drive end of the pump shaft.

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