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OPPOSING BRISTLE BRUSH SEAL CONFIGURATION TO ACCOMMODATE AXIAL MOTION OF ROTATING-STATIONARY INTERFACES

IP.com Disclosure Number: IPCOM000238552D
Publication Date: 2014-Sep-03
Document File: 3 page(s) / 36K

Publishing Venue

The IP.com Prior Art Database

Abstract

The present invention proposes a technique for providing relative motion of a consistent seal in a gas turbine. The technique includes a flexible brush seal configuration for consistent sealing regardless of a rotor axial movement. The present invention proposes a technique for relative motion of a consistent seal in a gas turbine. The technique includes a flexible brush seal configuration for consistent sealing regardless of a rotor axial movement.

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OPPOSING BRISTLE BRUSH SEAL CONFIGURATION TO ACCOMMODATE AXIAL MOTION OF ROTATING-STATIONARY INTERFACES

BACKGROUND

The present invention relates generally to a gas turbine and more particularly to an opposing brush seal bristle configuration in the gas turbine.

Generally, axial motion of a gas turbine rotor impacts effective clearance of a brush seal. The axial motion is relative to position of bristles attached to the brush seal backing plate. Effective clearance is path dependent with respect to the rotor axial movement, which is relative to the brush seal bristle position. For instance, effective clearance changes during an engine hot restart as compared to an engine cold start. Path dependency results in different steady state operating conditions which is difficult to manage design. The relative axial movement of the rotor detracts the brush seal bristles away from the backing plate resulting in alternative and least effective sealing mechanism.

A conventional technique includes stationary rotating interface rather than a stationary interface.

Another conventional technique includes a dual brush seal which are serially positioned in the gad turbine.

However, the conventional techniques do not accommodate axial motion of the rotating surface relative to the bristles brush seal.


It would be desirable to have an efficient technique to accommodate axial motion of the rotating surface relative to the brush seal bristles.

BRIEF DESCRIPTION OF THE DRAWING

Figure 1 depicts two configurations to accommodate forward and after axial movement of the rotor.

DETAILED DESCRIPTION

The present invention proposes a technique for providing relative motion of a consistent seal in a gas turbine. The technique includes a flexible brush seal configuration for consistent sealing regardless of a rotor axial movement such that engine full speed full load (FSFL) steady state condition is more deterministic. The technique proposes a brush seal configuration or arrangement to provide an...