公开(公告)号：US20200080440A1

公开(公告)日：2020-03-12

申请号：US16565572

申请日：2019-09-10

Applicant: ROLLS-ROYCE plc

Inventor： Gervas FRANCESCHINI ,  David R. H. GILLESPIE ,  Andrew K. OWEN

IPC: F01D11/12

Abstract: A brush seal for sealing a leakage gap in an axial flow path between a relatively higher fluid pressure region and a relatively lower fluid pressure region. The brush seal may comprise an outer housing and an inner housing located at least partially within and configured for radial displacement relative to the outer housing. The outer housing may comprise a first downstream outer contact member comprising a first upstream facing outer contact surface configured along a first radial contact line. The outer housing may comprise a second downstream outer contact member comprising a second upstream facing outer contact surface configured, and radially spaced from the first upstream facing outer contact surface, along the first radial contact line to define a downstream outer chamber opening of a downstream outer housing chamber therebetween. The inner housing may comprise a first bristle layer in physical communication with a first upstream facing inner contact surface configured along a second radial contact line. A downstream facing surface of the inner housing may be maintained in physical communication with at least the first upstream facing outer contact surface and the second upstream facing outer contact surface during radial displacement thereof. At all relative radial positions of the inner housing relative to the outer housing, during use, a collective contact surface between the downstream facing surface of the inner housing and both the first upstream facing outer contact surface and the second upstream facing outer contact surface may be greater than a collective surface of the downstream outer chamber opening.