PRESSURE RELIEF DEVICE FOR A PROPELLER HUB

摘要

A pressure relief device for preventing over pressurization of a propeller hub is disclosed. The pressure relief device is designed to fit within a ball hole opening in the hub arm of the hub. The pressure relief device includes a housing (12) which sealably interfaces with an inner wall of the ball hole opening and a pressure relief insert (14) which sealably interfaces with the housing. The pressure relief device includes a plurality of fracture tabs (36) which engage an end of the housing exposed to hub cavity pressure. The fracture tabs are designed to break at a design pressure allowing the pressure relief insert to be forced out of the housing thus breaking the seal between the pressure relief insert and housing thereby venting the hub cavity.