| 摘要 |
A brush seal for turbo-engines is provided for sealing off spaces (R1, R2) subjected, in use, to different pressures at a peripheral gap, particularly between an engine stator (101) and an engine rotor (102), a mounting (103) on the engine stator (101) for a bundle of bristles (B), which extends from a mounting (103) between peripheral webs (104, 105) so as to seal off the rotor (102) axially and form an axial gap in the peripheral direction with the web (105) facing the high-pressure side. The bundle of bristles (B) is provided with means for screening or breaking up (107) turbulent flow initiated by the engine rotor (102), at least on the side facing the space (R1) of higher pressure (P1) at the seal. The screening means are formed by an annular member (111) open substantially on one side to the fluid in the space of higher pressure. The annular member (111) is at least partially transversable, in use, by fluid flow, together with the end of one web (105) forming an axial annular duct (115<SP>1</SP>) along the rotor surface. The annular duct (115<SP>1</SP>) is connected to the axial gap upstream of the bristles.
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