Patent Number: 6,308,957

Title: Brush seal

Abstract: A brush seal designed for use between regions of high pressure differential and in an environment in which there is disturbed flow has a bristle pack sub-divided into a plurality of bristle pack regions with a leaky diaphragm between each region. The brush seal may comprise an assembly of individual seals with diaphragms between them or a single bristle pack which is sub-divided by at least one internal diaphragm. The diaphragms are preferably compliant and designed to allow a predetermined leakage flow between bristle regions. The leakage flow has several functions: it causes the pressure differential across the whole seal assembly to be more evenly distributed, and by providing an amount of flow in each pack this acts to calm the bristles thus helping to ensure each bristle region effectively contributes to the seal performance.

Inventors: Wright; Christopher (Bristol, GB)

Assignee: Rolls Royce PLC.

International Classification: F16J 15/32 (20060101); F16J 015/447 ()

Expiration Date: 10/30/2018