Blade retention apparatus with elastomeric preload

Details Blade retention apparatus with elastomeric preload Blade retention apparatus with elastomeric preload

1991-04-29

1992-06-02

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Articulated, resiliently mounted or self-shifting impeller...

Nonmetallic resilient mounting

416205, 416239, B64C 1106

Patent

active

051182564

ABSTRACT:
Preloading and retention of a variable-pitch, light-weight propeller blade (10) are achieved through a retention assembly wherein the blade shank (20) is retained within a hub arm (24) with an inboard angular contact pitch change bearing (30) and an outboard angular contact anti-rocking bearing (50) which is elastomerically preloaded. The outboard bearing (50) is disposed intermediate a bearing race (34) on the shank (20) and an annular frusto-conical rigid support member (62) which is biased outboardly against the anti-rocking bearing (50) by an annular frusto-conical body (72) of elastomeric material selected to impart a desired stiffness and/or damping effect to the retention assembly.

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