A mechanically optimized liquid inertia vibration eliminator and aircraft pylon system

摘要

A vibration isolator (401) includes an upper housing (403) and a lower housing (405); an upper reservoir housing (427) defining a upper fluid chamber (407); a lower reservoir housing defining a lower fluid chamber (409); a piston spindle (411) resiliently coupled to the upper housing with an upper elastomer member (413), the piston spindle being resiliently coupled to the lower housing with a lower elastomer member (415); an elongated portion (419) having a tuning passage (421); and a tuning fluid (423) disposed there within. The vibration isolator cancels vibratory forces at an isolation frequency. The vibration isolator is utilized in a pylon system for mounting a transmission in an aircraft (11). The vibration isolator is located between a pylon structure (615) and a roof structure (603). The isolator includes a spherical bearing assembly that is located near a waterline location of a rotational axis (617) of a drive shaft.