Low-friction seal ring with inexpensive diamond coating

US9010762B2 · kind B2 · utility

Assignee

• EagleBurgmann Germany GmbH & Co. KG · DE

Inventors

• Joachim Otschik · Aschaffenburg, DE
• Andreas Schrufer · Wolfratshausen, DE
• Dieter Ziegenbein · Geretsried, DE
• Rudolf Kollinger · Barth, DE
• Lothar Schäfer · Meine, DE
• Markus Höfer · Gardessen, DE
• Markus Armgardt · Braunschweig, DE

Key dates

• Filing date: Oct 4, 2011
• Grant date: Apr 21, 2015
• Expiry date: Oct 4, 2031

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16J15/3496
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

The present invention refers to a seal ring for a mechanical seal, comprising: a base body (2) with a diamond layer (3) which is applied to the base body (2) and configured as a sliding surface, wherein the diamond layer (3) has a thickness (D) which is less than or equal to 4 μm, particularly less than or equal to 3 μm, particularly less than or equal to 2 μm, particularly preferably about 1 μm, and wherein the base body (2) is without fissures or only comprises fissures that have a maximum longitudinal extension (L) on a surface of the base body (2) or in the base body (2) that is less than or equal to 5 μm.