Slide ring seal

US7938404B2 · kind B2 · utility

Assignee

• Wilo AG · DE

Inventors

• Klaus Hagen · Sulingen, DE
• Volker Netsch · Landshut, DE
• Bernd Huster · Lindau (Bodensee), DE

Key dates

• Filing date: Jul 24, 2006
• Grant date: May 10, 2011
• Expiry date: Aug 10, 2027

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16J15/3484
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A shaft extending along and rotatable about an axis and a housing surrounding a portion of the shaft are provided with a seal assembly having an inner ring fixed on and rotatable with the shaft and having a pair of axially oppositely directed outer faces and a pair of outer slide rings axially flanking the inner ring and having inner faces axially sealed on the inner-ring outer faces. The outer rings, the housing, and the inner ring form an annular housing compartment surrounding the shaft. A blocking compartment on the housing is separate from the housing compartment. The inner ring is formed with a radially throughgoing passage having an inner end open on the shaft and an outer end open into the housing compartment. The housing is formed with a bore between the housing compartment and blocking compartment.