Composite fan blade platform double wedge centrifugal seal

Details Composite fan blade platform double wedge centrifugal seal Composite fan blade platform double wedge centrifugal seal

1978-01-03

1980-01-15

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Rotor having flow confining or deflecting web, shroud or...

Axially extending shroud ring or casing

416196R, 416500, F01D 522

Patent

active

041837207

ABSTRACT:
A sealing arrangement for preventing compressor fan air loss through the relatively wide gaps between adjacent blade platforms required in order to allow for rotation of the blades around their minor root axes in response to bird impact and the like. A thin flexible ribbon-like seal is bonded to one of the two adjacent blade platforms in the fan structure. At the gap, the seal includes a thickened wedge shaped portion with at least one invagination on the inner side facing the rotor axis. At the operating speed of the compressor fan, centrifugal force causes the thickened portion to be forced into the gap between adjacent platforms producing the required seal.

REFERENCES:
patent: 1554614 (1925-09-01), Allen
patent: 2356605 (1944-08-01), Meininghaus
patent: 3266771 (1966-08-01), Morley
patent: 3709631 (1973-01-01), Karstensen et al.
patent: 3734639 (1973-05-01), Short
patent: 3752598 (1973-08-01), Bowers et al.
patent: 3936222 (1976-02-01), Asplund et al.

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