Main rotor elastomeric bearing seal

摘要

A lubricant seal for a grip and spindle assembly attaching rotor blades to a helicopter mast. An elongated grip has a clevis for attachment to a helicopter blade. A spindle extends into a chamber in the inboard end of the grip. The grip is mounted to rotate on the spindle for blade pitch change. An annulus between the exterior of the spindle and inside of the grip houses bearing means rotatably positioning the grip on the spindle. Lubricant in the annulus is sealed in by seals positioned at the ends of the annulus. The seals are elastomeric cylinders each having one end rigidly attached to the spindle and the other end rigidly attached to the grip.