Seal and method for manufacturing thereof

US9360116B2 · kind B2 · utility

Assignee

• AKTIEBOLAGET SKF · SE

Inventors

• Juergen Netzer · Burscheid, DE
• Helmut Benedix · Leichlingen, DE
• Willy Seewald · Remscheid, DE

Key dates

• Filing date: Dec 17, 2013
• Grant date: Jun 7, 2016
• Expiry date: Jan 4, 2034

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16J15/3244
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A seal includes a sealing lip having a sealing region with a pumping structure that can abut on a first component. The pumping structure causes a liquid medium to move in a direction from a first axial side of the seal towards or to a second axial side of the seal when the first component rotates relative to a second component. The pumping structure includes at least one pumping groove that extends along a direction of extension and at least one retaining structure disposed in the at least one pumping groove. The at least one retaining structure reduces a cross-section of the at least one pumping groove, in at least one direction perpendicular to the direction of extension, to a value of between 50% and 90% of an extension of the cross-section of the pumping groove outside the at least one retaining structure along the at least one direction.