Process fluid lubricated pump and pumping system

US12006946B2 · kind B2 · utility

Assignee

• Sulzer Management AG · CH

Inventors

• Karel DE RAEVE · Winterthur, CH
• Thomas Welschinger · Radolfzell, DE

Key dates

• Filing date: Nov 9, 2021
• Grant date: Jun 11, 2024
• Expiry date: May 17, 2042

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05D2260/6022
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A process fluid lubricated pump includes a housing with an inlet to receive the fluid, and an outlet to discharge the fluid, a shaft extending from a drive end to a non-drive end and rotatable about an axial direction, the drive end of the shaft arranged outside the housing, a hydraulic unit including impellers mounted on the shaft, a collection chamber to collect leaking process fluid, the collection chamber comprising an exit, through which the shaft passes, and an exit to discharge the process fluid, and a throttle device arranged between the hydraulic unit and the collection chamber, the throttle device comprising a stationary throttle part having first and second axial faces delimiting the stationary throttle part, the first axial face facing the collection chamber, and the throttle device including a throttle gap surrounding the shaft and extending from the first axial face to the second axial face.