Arrangement for sealing a reciprocating rod

US5104131A · kind A · utility

Assignee

• Busak + Luyken GmbH & Co. · DE

Inventors

• Roy Edlund · Stuttgart, DE
• Heinz Muller · Waiblingen, DE

Key dates

• Filing date: Aug 6, 1991
• Grant date: Apr 14, 1992
• Expiry date: Aug 6, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S277/916
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

In the case of conventional seal arrangements comprising a sealing ring (5) consisting of a tough-elastic plastic material and a rubber-elastic stressing ring (6), where one edge (53) of the sealing ring (5) is in contact with the circumference of a rod (1), the pressing force encountered at the edge is dependent, to a very high degree, on the fluid pressure because the fluid pressure acts upon the circumferential surface of the sealing ring (5) either directly or via the rubber-elastic stressing ring (6). The pressing force, which consequently rises considerably in the presence of high fluid pressure, leads to high frictional forces at the sealing edge (53), which increase even further in the course of operating time. The invention makes the system independent of the operating pressure by the fact that the stressing ring (6) is arranged at the high-pressure end of the sealing ring (5) and that the size of the surface, upon which the fluid pressure acts from the outside, can be exactly determined by the particular configuration of the contact surface for the stressing ring.