Power plants – Reaction motor – Interrelated reaction motors
Patent
1989-06-15
1995-05-23
Nelson, Peter A.
Power plants
Reaction motor
Interrelated reaction motors
60208, 60269, 60 3943, F02K 302
Patent
active
054170559
ABSTRACT:
This invention provides a valve for diverting fluid flow in a tandem fan type engine. The valve comprises an axially displaceable sleeve 38 which is provided with two circumferentially extending sealing lands 40, 42 which in operation cooperate with two locating surfaces 50, 52 provided on the duct 22 between the first and second compressors 20, 24 of said engine to seal an outlet opening 36. The free unsprung length between the sealing lands 40, 42 is greater than the length between the locating surfaces 50, 52. Gas pressure is used to compress a contractable portion 54 in said sleeve and hence ensure sealing takes place between both pairs of locating surfaces and sealing lands. This apparatus ensures centralisation of the upstream and downstream ends of the sleeve 38 is independently obtainable and accommodates thermal expansion differentials between the sleeve 38 and the duct 22.
REFERENCES:
patent: 3702681 (1972-11-01), Hasbrouck et al.
patent: 3913321 (1975-10-01), Snell
patent: 4038818 (1977-08-01), Snell
patent: 4133173 (1979-01-01), Schadow
patent: 4275560 (1981-06-01), Wright et al.
patent: 4782657 (1988-11-01), Lewis et al.
patent: 4845939 (1989-07-01), Jordan et al.
Nelson Peter A.
Rolls-Royce plc
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