Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Nonmetallic resilient mounting
Patent
1989-08-24
1991-08-27
Kwon, John T.
Fluid reaction surfaces (i.e., impellers)
Articulated, resiliently mounted or self-shifting impeller...
Nonmetallic resilient mounting
416135, B64C 2733
Patent
active
050429671
ABSTRACT:
A rotor system according to this invention includes a structurally flexible coupling for transmitting rotor torque and other rotor loads to a rotor hub. The rotor hub is adapted to have rotor blades mounted thereon and is mounted by an elastomeric spherical bearing whose center is located at the rotor center. A flexible coupling made from fiber reinforced resin matrix material, connected to the bearing at a connection located below the bearing center, extends vertically from that location through the bearing to a position located above the center where it is connected to a connecting member fixed to the rotor hub. The flexible coupling is structurally stiff with respect to the mode in which it transmits rotor torque compared to the rotor torque stiffness of the other components. However, the bending stiffness and axial stiffness of the flexible coupling is substantially less compared to the mode in which rotor moments and forces are transmitted from the other components to the rotor shaft.
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patent: 3080002 (1963-03-01), Du Pont
patent: 3082826 (1963-03-01), Doman et al.
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patent: 4156583 (1979-05-01), Mayerjak
patent: 4251187 (1981-02-01), Hollrock
patent: 4708591 (1987-11-01), Roman
patent: 4877375 (1989-10-01), Desjardins
A Torsionally Stiff-Bending Soft Drive Shaft, Hannibal & Avila, Jan. 1984.
Progress in the Development of Elastomeric Matrix Composites, McGuire, Hannibal & Blenner, Jun. 1985.
Kwon John T.
The Boeing Company
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