Brush seal for turbo engines

US6077038A · kind A · utility

Assignee

• MTU Motoren-und Turbinen-Union München GmbH · DE

Inventors

• Alfons Gail · Friedberg, DE
• Uwe Michel · Bad Honnef, DE
• Edgar Pfister · Dachau, DE
• Lothar Reisinger · Dachau, DE
• Thomas Miller · Willowbrook, US

Key dates

• Filing date: Dec 19, 1997
• Grant date: Jun 20, 2000
• Expiry date: Dec 19, 2017

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05D2240/56
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A brush seal assembly for turbo-engines is provided for sealing off spaces on a circumferential gap which are differently acted upon by pressure, particularly between an engine stator and an engine rotor. A holding device for a bristle bundle is provided on the engine stator, from which holding device the bristle bundle is guided between circumferential webs in a sealing manner against the engine rotor and forms an axial gap in the circumferential direction with respect to one web facing the high-pressure side. The upstream one of the circumferential webs, together with the engine rotor surface, forms an axial ring gap for flow of fluid therethrough. Turbulence reducing structure is disposed upstream of the upstream web in the high pressure space and serves to reduce the turbulence in flow of air from the upstream space through the axial ring gap. This turbulence reducing structure can be in the form of a metal sponge and/or a honey comb structure.