Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Nonmetallic resilient mounting
Patent
1996-03-18
1997-07-08
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
Articulated, resiliently mounted or self-shifting impeller...
Nonmetallic resilient mounting
416141, 416230, 416244R, B64C 2737, B64C 2735
Patent
active
056454007
ABSTRACT:
A composite cuff structure (40) for mounting the root end (14e) of a rotor blade assembly (14) to the radial arms (24a, 24b) of a rotor assembly yoke (24) and for accommodating a twist disparity therebetween. The composite cuff structure (40) is generally tubular in shape and is fabricated from a composite material having reinforcing fibers (70) disposed in a binding matrix. The composite cuff structure (40), furthermore, includes a blade-receiving sleeve portion (42), a yoke mounting portion (44), spanwise fold portions (46) and sidelobe portions (48), which portions (42, 44, 46, 48) are structurally integrated to form a unitary body. The blade-receiving sleeve portion (42) is disposed in combination with the root end (14e) of the rotor blade assembly (14) and includes first and second blade mounting segments (42a, 42b), which define a rotor blade attachment plane P.sub.B. The yoke mounting portion (44) is disposed in combination with the radial arms (24a, 24b) of the rotor assembly yoke (24) and includes fore and aft pairs (44-1, 44-2) of first and second yoke mounting segments (44a, 44b) defining a yoke attachment plane P.sub.Y. The pairs (44-1, 44-2) of yoke mounting segments (44a, 44b) are, furthermore, disposed laterally of the blade mounting segments (42a, 42b). The spanwise fold portions (46) include first and second complementary curve segments (46a, 46b) for structurally interconnecting the blade and yoke mounting segments (42a, 42b, 44a, 44b) such that the rotor blade attachment plane P.sub.B forms an angle .theta. with respect to the yoke attachment plane P.sub.Y. The sidelobe portions (48) include fore and aft curved segments (48a, 48b) for structurally interconnecting the first and second yoke mounting segments (44a, 44b).
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Hunter David H.
Scherer Karl B.
Collins Brian A.
Look Edward K.
Sikorsky Aircraft Corporation
Verdier Christopher
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