초록 ▼

A variable area exhaust nozzle has primary, axially movable flaps tied to an inner unison ring having a box-like cross section and axially movable external flaps tied to an outer unison ring of box-like cross section. The inner and outer rings are concentric, radially aligned, and separated by an en

A variable area exhaust nozzle has primary, axially movable flaps tied to an inner unison ring having a box-like cross section and axially movable external flaps tied to an outer unison ring of box-like cross section. The inner and outer rings are concentric, radially aligned, and separated by an engine case. The rings are interconnected by a plurality of pins extending radially from within the outer ring box section to within the inner ring box section through axially extending slots in the case between them. The pins are attached to the rings in a manner preventing relative axial movement therebetween and permitting relative radial movement. When one of the rings is actuated in an axial direction, the other moves axially therewith, the axial actuation force being transmitted by the interconnecting pins. The pins also resist the overturning moment on the rings caused by loads on the nozzle flaps.

대표청구항 ▼

In a gas turbine engine having an axis and comprising engine fixed structure and a convergent/divergent exhaust nozzle assembly supported from said structure, said structure including case means, the improved nozzle assembly comprising: unison ring means including an inner annular box section dispos

In a gas turbine engine having an axis and comprising engine fixed structure and a convergent/divergent exhaust nozzle assembly supported from said structure, said structure including case means, the improved nozzle assembly comprising: unison ring means including an inner annular box section disposed around the engine axis and an outer annular box section disposed around the engine axis radially outwardly of said inner box section and radially aligned therewith, said case means being disposed between said inner and outer box sections and having a plurality of circumferentially spaced apart axially extending slots therethrough; said unison ring means further including a plurality of circumferentially spaced apart radially extending pins each having an inner and outer end, each pin extending into one of said box sections and across the radial height thereof and being fixed relative thereto, said pins extending radially through one of said slots in said case means into and across the radial height of said other one of said box sections and being fixed axially relative to said other one of said box sections and movable radially relative thereto, said pins providing torsional stiffness to said unison ring means; an axially translatable variable area convergent nozzle comprising a plurality of rotatable and translatable first flaps having upstream ends pivotally connected to said inner box section; an axially translatable variable area divergent nozzle downstream of said convergent nozzle and including a plurality of second flaps pivotally connected to said first flaps; connecting means having downstream ends pivotally connected to said second flaps and upstream ends pivotally connected to said outer box section; and actuation means connected to said unison ring means for translating one of said box sections in an axial direction, wherein said other one of said box sections is translated axially simultaneously, said translating force being transmitted to said other one of said box sections through said pins.