Patent · US Active

Rotary machine with adjustable leakage gap

US11679365B2 · kind B2 · utility

0Cited by

10References

17Claims

0Family size

Assignee

Sulzer Management AG · CH

Inventors

Erik Blechingberg · Handen, SE
Amir Baniameri · Gothenburg, SE
Mikael Andersson · Ronneby, SE

Key dates

Filing date	Apr 23, 2020
Grant date	Jun 20, 2023
Priority date	—
Expiry date	Apr 23, 2040

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01F2035/352
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A rotary machine for acting on a process fluid includes an impeller, a shaft, a drive, a seal and a flush casing. The impeller acts on the process fluid and is mounted on the shaft. The drive is connected to the shaft and rotates the shaft and the impeller about an axial direction. The seal has a sealing element sealing the shaft during rotation of the shaft. The flush casing receives a flushing fluid for flushing the sealing element, and delimits an annular flush chamber extending about the sealing element. The flush casing includes a bushing surrounding the sealing element and delimits a radial leakage gap arranged between the sealing element and the bushing. The bushing delimits an axial leakage gap between the impeller and the bushing, and the width of the axial leakage gap in the axial direction is adjustable.

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