Self-draining shaft seal with wedge-shaped trough

US5667225A · kind A · utility

Assignee

• RENK GmbH · DE

Inventors

• Angela Vollmer · Dortmund, DE
• Joachim Meyer · Frankenthal (Pfalz), DE

Key dates

• Filing date: Feb 20, 1996
• Grant date: Sep 16, 1997
• Expiry date: Feb 20, 2016

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16J15/3272
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A shaft seal includes a plurality of axially spaced annular sealing rings which define oil collection channels. A radial drain aperture extends from the bottom of each channel into an interior trough which extends axially to a discharge orifice in a front end wall of the seal. The bottom of the trough is downwardly inclined for enhanced gravity flow. A portion of the outer periphery of the seal which projects into the housing is outwardly flared and includes a lower discharge lip to provide a return flow surface which directs return flow of sprayed oil away from the seal.