| 摘要 |
An aircraft trailing edge flap assembly (32) including a main flap (36) and an aft flap (50) are repositioned by a dual arm rotary actuator (60). One arm (130) of the rotary actuator repositions the main flap by driving a carriage assembly (100) along a linear track (66). The other arm (136) of the rotary actuator repositions the aft flap (50) by driving a bell crank assembly which is operatively connected to an aft flap support member (90) extending downward from the aft flap (50). The aft flap support member (90) is operatively connected to a main flap support member (92) which extends downwardly and rearwardly from the rear portion of the main flap (36) to operatively connect with a mounting member (70) extending downwardly and rearwardly from the track (66) so that the track mounting member (70) supports the majority of aerodynamic load forces applied to the flap assembly. Both arms of the rotary actuator rotate together through a predetermined arc so that the aft flap and main flap remain in a nested configuration. The main flap rotary arm (130) engages a stop pin resulting in the aft flap rotary arm (136) continuing to rotate the aft flip an additional amount relative to the main flap. The rotary actuator includes a cylindrical housing (160), enclosing therein a cylindrical locking ring (162) integrally attached to the main flap rotary arm (130), the locking ring including a plurality of radial passageways, each containing a locking ball (170) therein which projects outside the passageways either; i) to engage an arcuate recess (180) on the outer surface of a cylindrical aft flap locking ring (164), the aft flap locking ring rotatably engaged within the main flap locking ring (162), to couple the aft flap arm to the main flap arm, or ii) to engage an arcuate recess (176) on the inner surface of the housing (160) to couple the main flap arm to the housing allowing the aft flap arm to rotate independently of the main arm. In another embodiment, the double arm rotary actuator is replaced by a single arm rotary actuator (200) having pivot connectors (208, 212) radially displaced relative to one another which connect to the carriage assembly and to the bell crank assembly respectively via connecting rods. The differential radial displacement of the pivot connectors results in a different radius of rotation therebetween which causes a faster rate of movement of the aft flap relative to the main flap. |
