Fluid reaction surfaces (i.e. – impellers) – Miscellaneous
Patent
1990-04-23
1991-12-24
Kwon, John T.
Fluid reaction surfaces (i.e., impellers)
Miscellaneous
416204A, 416219R, 416220R, 403381, F01D 532
Patent
active
050747541
ABSTRACT:
A retention system for a rotor blade (10) utilizes the combinatioin of a fixed retention flange (13) and a removable retention plate (16) with a closed-sided retention member (12). This system enables the rapid replacement or removal of the rotor blade (10) for inspection, maintenance, or replacement purposes without requiring removal of surrounding major engine components or structural members. The rotor blade (10) is installed in a retention member (12) contained in a rotatable hub (not shown) by inserting an outwardly extending portion (20) of a shaped blade root (22) of the rotor blade (10) below a radially-inwardly projecting shaped flange (13) peripherally disposed within the interior of the retention member's structure. A removable shaped retention plate (16), which is releasably secured to, and adapted to mate with, the retention member (12), then captures and secures another outwardly extending portion (21) of the shaped root of the rotor blade (10) with a releasable fastener (18). The shaped root (22) is secured within the retention member (16) without a direct bolted connection. Preloading the fastener (18) induces compressive loading among the system components (12, 16, 22), resulting in the attenuation or elimination of fretting and wear of their respective component surfaces (21, 22, 23, 24).
REFERENCES:
patent: 889622 (1908-09-01), Rotter
patent: 952317 (1910-03-01), Eyermann
patent: 1470499 (1923-10-01), Steenstrup
patent: 2331555 (1943-10-01), Jostich, Jr. et al.
patent: 4057294 (1977-11-01), Krekeler
patent: 4108571 (1978-08-01), Mawson
patent: 4349318 (1982-09-01), Libertini et al.
patent: 4480958 (1984-11-01), Schlechtweg
Kwon John T.
Rosenberg Marshall E.
United Technologies Corporation
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