Patent ID: 9551393
Date: 2017-01-24
CPC Classifications: B64C,F16F

Claim:
1. A rotorcraft vibration isolation system comprising: a plurality of liquid inertia vibration elimination (LIVE) units mounted on a first rotorcraft surface; each LIVE unit comprising a housing defining a fluid chamber, a fluid disposed within the fluid chamber, a piston disposed within the housing that divides the fluid chamber into two volumes, and a tuning port or passage passing through the piston such that the two volumes are in fluid communication; a passive accumulator mounted on a second rotorcraft surface at a location that is remote from locations of the plurality of LIVE units, wherein, during rotorcraft operation, the second rotorcraft surface experiences lesser periodic vibration than the first rotorcraft surface; and a fluid passage to connect the passive accumulator to the fluid chamber of the plurality of LIVE units in parallel, the fluid passage having sufficient length to traverse between the location of the passive accumulator and each location of each LIVE unit.