Sealing device for a turbomachine bearing chamber

US6142729A · kind A · utility

Assignee

• TECHSPACE AERO · BE

Inventors

• Hung Tran · Liège, BE
• Lorenzo Pacchioni · Riemst, BE

Key dates

• Filing date: Jun 18, 1999
• Grant date: Nov 7, 2000
• Expiry date: Jun 18, 2019

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01D25/183
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A sealing device for a turbomachine bearing chamber in which a bearing is mounted between a sleeve secured to a rotary shaft and a casing defining said bearing chamber, said sealing device comprising a labyrinth seal disposed on the sleeve at the junction with an adjacent air chamber, a static carbon ring which is not in contact with the shaft and is retained axially in position in a fixed annular support, and a rotary ring which is driven by the sleeve and which is centred without clamping on the sleeve by means of a ring seal and is retained axially in position by a flat annular spring, the rotary ring having a radial surface which faces and co-operates with a radial surface of the carbon ring and which is formed with lift grooves such that, during operation, a substantially frictionless sealing is effected between the two radial surfaces.