Elastomeric bearing for helicopter rotor

Details Elastomeric bearing for helicopter rotor Elastomeric bearing for helicopter rotor

1977-04-08

1979-03-06

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

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

Nonmetallic resilient mounting

308 26, 416141, B64C 2738, F16C 900

Patent

active

041428331

ABSTRACT:
An elastomeric bearing for a helicopter rotor in which the laminates of the bearing are shaped and positioned so that the center of hydrostatic pressure generated in each elastomer laminate and the cross-sectional center of gravity of each metal laminate are in alignment so that the integrated load vectors reacted through the metal and elastomer laminates of the bearing in imparting blade centrifugal loads to the hub therethrough are substantially in alignment to thereby prevent the creating of eccentric internal moments and hence avoid life reducing bending and hoop stresses in the metal laminates and unnecessarily high hydrostatic pressures in the elastomer laminates.

REFERENCES:
patent: 3083065 (1963-03-01), Hinks et al.
patent: 3228673 (1966-01-01), Hinks
patent: 3759631 (1973-09-01), Rybicki
patent: 3862812 (1975-01-01), Gorndt et al.
patent: 3941433 (1976-03-01), Dolling et al.
patent: 4040690 (1977-08-01), Finney
"Elastomeric Bearing Application to Helicopter Tail Rotor Designs", by C. H. Fagan-paper presented at American Helicopter Society Southwest Region Tech. Meeting on: Jan. 25, 1968.

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