Brush seal
AssigneeROLLS-ROYCE plc
InventorBryan L. Belcher
Life of this patent
Estimating the term…
Abstract
A brush seal operationally located between a rotatable shaft and static structure comprises a number of stages. The seal stage adjacent a region of low fluid pressure and its adjacent stage are spaced apart by an apertured ring. The apertures in the ring being so dimensioned as to vent pressurized fluid from the chamber and thereby reduce the magnitude of the pressure differential across the seal stage adjacent the region of low fluid pressure.
Claims7
A brush seal to be interposed between regions of high and low fluid pressure and between relatively movable members comprising at least two seal stages in series relationship with respect to said regions of high and low fluid pressure, each stage comprising a plurality of filaments adapted, in operation to be in fixed relationship with one of said members and in sliding relationship with the other of said members, the stage operationally adjacent the region of low pressure being spaced apart from its adjacent stage to define a chamber, means being provided to vent fluid from said chamber at a rate which ensures that the fluid pressure differential across said stage adjacent said low pressure region is within the operational capabilities of said stage.
Dependencies are inferred from the claim text.