Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1989-11-29
1990-11-20
Cuchlinski, Jr., William A.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
4151745, F16J 15447, F01D 1102
Patent
active
049713361
ABSTRACT:
One problem associated with presently known brush seals (10) used in gas turbine engines is their limited ability to cope with excessive radial inteference due for example to excessive thermal or centrifugal growth of the component against which they seal (18). The bristles (16) of the seal tend to spread axially and may assume a permanently deformed shape. In either case, the performance and life of the seal (10) is adversely affected. This invention overcomes the above problem by providing a brush seal which comprises a series of segments (20) of bristle material (16) which are circumferentially spaced from each other by a predetermined amount to form a gap (G). The gap (G) allows a greater degree of radial and circumferential deflection of the bristles (16) within the plane of the seal (10) before the bristles (16) are forced to move axially. It is contemplated that good design could avoid axial displacement altogether.
REFERENCES:
patent: 885032 (1908-04-01), De Ferranti
patent: 3917150 (1975-11-01), Ferguson et al.
patent: 4202554 (1980-05-01), Snell
patent: 4209268 (1980-06-01), Fujiwara et al.
patent: 4600202 (1986-07-01), Schaeffler et al.
Cuchlinski Jr. William A.
DePumpo Daniel G.
Rolls-Royce plc.
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