Fluid reaction surfaces (i.e. – impellers) – Rotor having flow confining or deflecting web – shroud or... – Radially extending web or end plate
Patent
1975-01-27
1976-05-25
Raduazo, Henry F.
Fluid reaction surfaces (i.e., impellers)
Rotor having flow confining or deflecting web, shroud or...
Radially extending web or end plate
415143, 416132R, 416500, 415DIG1, B64C 1116
Patent
active
039589056
ABSTRACT:
A centrifugal compressor assembly for a gas turbine engine includes an inducer section and an impeller section mounted for rotation about an axis. Because leading edges of the impeller blades are cambered, damper pads, extending perpendicular to the low pressure sides thereof also extend axially forward. Blades of the inducer section are indexed rotationally rearward of the impeller blades to improve the distribution of compression gases through the impeller section and high pressure surfaces of the inducer blades mate near their leading edges with outward surfaces of the damper pads. Because the pads and inducer blades vibrate at different frequencies, inducer blade vibrations that might otherwise cause fatigue are attenuated by contact with the damper pads. The damper pad arrangement thus permits the damping of vibrations in the inducer blades notwithstanding the indexed relationship between the inducer section and the impeller section.
REFERENCES:
patent: 1258462 (1918-03-01), Rice
patent: 2405283 (1946-08-01), Birmann
patent: 2664240 (1953-12-01), Gorton
patent: 2859933 (1958-11-01), Whitaker
patent: 2941780 (1960-06-01), VON Der Nuell et al.
patent: 3627447 (1971-12-01), Okapuu
patent: R27038 (1971-01-01), Newland
Deere & Company
Raduazo Henry F.
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