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 devices is designed to fit within a ball hole opening in the hub arm of the hub. The pressure relief device includes a housing which sealably interfaces with an inner wall of the ball hole opening and a pressure relief insert which sealably interfaces with the housing. The pressure relief device includes a plurality of fracture tabs 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.