Fluid reaction surfaces (i.e. – impellers) – Support mounting – carrier or fairing structure
Patent
1992-06-22
1994-01-25
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
Support mounting, carrier or fairing structure
416204R, 403359, B64C 1102
Patent
active
052810992
ABSTRACT:
An integrated spline/cone seat subassembly for a rotor assembly that is design optimized to minimize the radial dimensions of the rotor shafts, the rotor shaft bearings, the transmission housing, and the swashplate subassemblies thereof. The integrated subassembly includes a rotor hub having a shaft aperture with a plurality of hub splines extend radially inwardly therefrom. The lower portion of each hub spline has an outwardly tapered portion that makes a predetermined angle with respect to the hub centerline. The integrated subassembly further includes a rotor shaft having a primary shaft portion of a first diameter, an end shaft portion having an intermediate second diameter less than the first diameter, and a conic transition portion that makes a predetermined angle with respect to the rotor shaft axis. The end shaft portion has a plurality of shaft splines extending radially outwardly therefrom that defines a third diameter that is equal to the first diameter. The hub and shaft splines are sized to accommodate the torque required by the rotor assembly and interleaved to provide a rotational interlock between the rotor hub and rotor shaft. The tapered portions of the hub splines abuttingly engage and are mechanically supported by the conic transition portion of the rotor shaft. The first diameter of the rotor shaft defines the radial dimensions of the rotor shafts, the rotor shaft bearings, the transmission housing, and the swashplate subassemblies of the rotor assembly.
REFERENCES:
patent: 3901102 (1975-08-01), Manwaring
patent: 3972491 (1975-08-01), Ferris et al.
patent: 4175913 (1979-11-01), Rybicki
patent: 4209266 (1980-06-01), Bowen et al.
Hunter David H.
Krauss Timothy A.
Millea Vincent F.
Look Edward K.
Radke Terrance J.
Sgantzos Mark
United Technologies Corporation
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