Brush seal between a rotor and a stator in a turbine machine

US5975535A · kind A · utility

Assignee

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

Inventors

• Alfons Gail · Friedberg, DE
• Klemens Werner · Munich, DE

Key dates

• Filing date: Sep 29, 1997
• Grant date: Nov 2, 1999
• Expiry date: Sep 29, 2017

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05B2220/302
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A brush seal is provided for sealing, with minimized leakage, a circumferential gap (S), for example between a rotor (1) and a stator (2) in a gas turbine engine. The brush seal includes a bristle housing (4) rigidly mounted on the stator or the rotor, and bristles (6) having fixed ends securely and durably held in the housing (4) and free ends protruding toward and into the annular gap (S). The housing (4) includes two holder disks (5A, 5B) with an interspace (Z) therebetween, wherein the interspace includes at least one of an axially directed first clamping portion (8) and a radially directed second clamping portion (10), and a widened non-clamping portion (7A, 7B). The fixed ends of the bristles are clampingly held in the first and second clamping portions, while the free ends of the bristles extend generally toward the opposite rotor or stator while being movably supported and guided by the widened non-clamping portion of the interspace (Z). The bristles (6) may extend at a tilt angle in the circumferential direction and may be stitched, woven, or glued together at their fixed ends in order to form a single bristle packet.