Twist proof seal ring arrangement for shafts

US4729569A · kind A · utility

Assignee

• Martin Merkel GmbH & Co KG · DE

Inventors

• Heinz Muller · Waiblingen, DE
• Andreas Wolf · Munich, DE

Key dates

• Filing date: Jul 11, 1985
• Grant date: Mar 8, 1988
• Expiry date: Jul 11, 2005

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16L27/087
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

Means for preventing relative twisting between a seal ring and the parts of structure accommodating it by providing that in connection with high pressure shaft seals, the axial thrust resulting from the action of the pressure of the seal ring on its low pressure side radial face is taken up by a number of projections, the cross section of the seal ring undergoing undulating deformation as seen in the circumferential direction owing to the axial flexure of individual parts of the seal ring; it is furthermore possible to have additional projections as means for preventing twisting. As a consequence of the undulation of the entire cross section of the seal ring there will also be the useful effect of undulation of the seal interface edge, constituted by parts of this cross section, on the high pressure side.