摘要:
A rotary actuator (32), including a manifold block (34) and a rotor assembly (36) that includes a rotor shaft (46) and a plurality of arcuate pistons (60) attached to the rotor shaft, each arcuate piston curving at a set radial distance from the rotor shaft, and each piston attached to the rotor shaft via a crank arm (58). A pressure chamber assembly (64) coupled to the manifold block defines a plurality of piston pressure chambers (66) that receive and at least partially enclose each arcuate piston, including a plurality of gland seals (72) disposed adjacent the entrance of each piston pressure chamber to create a seal between the inner surface (70) of the pressure chamber and the outer surface (68) of the arcuate piston. Each gland seal includes an inner seal (88) that engages the piston surface of the arcuate piston, and plural outer seals (901) that engage the inner surface of the piston pressure chamber, forming a hydraulic seal.
摘要:
A pneumatic artificial muscle (PAM) actuator includes first and second end caps, an elastic bladder connected to the end caps, and a covering around the elastic bladder and connected to the end caps. At least one of the first and second end caps is configured to move and narrow a distance between the end caps in response to inflation of the elastic bladder by a fluid. At least one of the end caps includes a vent configured to allow the fluid to exit the elastic bladder and collapse the covering after activation of the PAM actuator. At least the covering is configured to provide braking for the PAM actuator. The covering may be configured to collapse at least partially between the first and second end caps to provide at least some of the braking for the PAM actuator.
摘要:
An actuator includes a plurality of cylinder units (11) each including a cylinder and a rod (21), and is pivotably attached, at a first end thereof, to a control surface (102). A reaction link (12) is pivotably attached, at a first end thereof, to a fulcrum shaft (104) rotatably supporting the control surface. The reaction link (12) is pivotably attached, at a second end thereof, to a second end of the actuator between the plurality of cylinder units (11).
摘要:
An automatic engine driven pump (EDP) depressurization system for an aircraft is disclosed. The aircraft includes at least two EDPs (30a) driven by a main engine for converting mechanical power provided by the main engine into hydraulic power for distribution by a hydraulic system. The EDP depressurization system includes a depressurization device (70a) corresponding to each of the at least two EDPs (30a) and a control module (80). The depressurization devices (70a) are each energized to depressurize a respective EDP (30a). The control module (80) is in signal communication with each of the depressurization devices (70a). The control module (80) includes control logic for automatically generating a depressurization signal that energizes one of the depressurization devices based on a plurality of operational conditions of the aircraft.
摘要:
The invention relates to a linear, hydraulic pivot drive, especially for the flap control system of aerodynamic structures. Said pivot drive (1) comprises a housing (2) provided with ports (3, 4) for introducing a hydraulic medium, a piston (5) which is arranged inside the housing (2) and can be axially displaced by the effect of the hydraulic medium, and an output shaft (6) which is provided with coarse threads (8a, 8b) and interacts with the piston (5) in order to convert the axial displacement of the piston (5) into a rotational movement. The invention is characterised in that the output shaft (6) is integrated into the piston (5), the coarse threads (8a, 8b) running in the same direction and engaging in the piston (5), and the cross-section of the piston has a spline profile for effectively preventing a rotational movement of the piston (5).