초록 ▼

The external flaps of a variable exhaust nozzle for a gas turbine engine are attached to the nozzle by a pair of pivotal rods attached to the nozzle's internal support structure and slidably fits into elongated spaced bushings extending along the longitudinal axis of the flaps formed in bosses exten

The external flaps of a variable exhaust nozzle for a gas turbine engine are attached to the nozzle by a pair of pivotal rods attached to the nozzle's internal support structure and slidably fits into elongated spaced bushings extending along the longitudinal axis of the flaps formed in bosses extending orthogonally from the inner surface of the flaps. The attachment to the support structure includes a unison ball made from composite material that fits into a spherical track formed in a recess in the end of the rods. The method of installation is to insert one of the post into the first bushing that is offset from the second bushing. After the slight engagement of the first post, the second post is pivoted to align with its complementary bushing and the flap is positioned forward to fully engage the rods into the bushings. The aft end hinge of the flap is then attached, A limit pin that is attached to the post travels in a slot designed to limit the travel of the post. Another embodiment includes a damping function in the attachment.

대표청구항 ▼

[ It is claimed:] [1.] Attachment means for external flaps of a variable area exhaust nozzle of the type that includes inner flaps and outer flaps for a gas turbine engine, the exhaust nozzle having a generally cylindrical outer casing and an annular support structure, a blind bracket affixed to sai

[ It is claimed:] [1.] Attachment means for external flaps of a variable area exhaust nozzle of the type that includes inner flaps and outer flaps for a gas turbine engine, the exhaust nozzle having a generally cylindrical outer casing and an annular support structure, a blind bracket affixed to said annular support structure, said attachment means including at least one pivotal hinge link pivotally attached to said blind bracket having a cylindrical shaped portion extending beyond said blind bracket, at least one boss orthogonally formed on said external flap and extending axially thereon, a bushing formed in said boss for unmovably insertion of said cylindrical portion for slidably supporting said hinge link for hingedly supporting one end of said external flap and means for supporting the other end of said external flap for articulate movement when the area of said exhaust nozzle is varied whereby assembly and disassembly of said external flap is facilitated.