Seal ring with channel for radially accelerating medium to be sealed

US4428587A · kind A · utility

Assignee

• Firma Carl Freudenberg · DE

Inventor

• Hans Forch · Birkenau, DE

Key dates

• Filing date: May 10, 1983
• Grant date: Jan 31, 1984
• Expiry date: May 10, 2003

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16J15/164
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A seal ring seals a shaft in a housing dynamically and statically. The dynamic seal function is provided by a porous compact which rotates with the shaft to pump liquid media centrifugally back into the sealed space and generally radial, inward channels which similarly pump gases which penetrate the compact to the channels. An annular gas impingement surface is spaced from the discharge ends of the channels at an obtuse angle to entrain the pumped gases back into the sealed space. The static seal centrifugally opens upon rotation.