Aircraft hydraulic system comprising at least one servo-control, and an associated rotor and aircraft
AssigneeAirbus Helicopters
InventorsJean-Romain Bihel, Clement Coic, Thibaut Marger, Gerard Couderc
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Abstract
A hydraulic system of an aircraft, the system comprising at least one servo-control, each servo-control comprising at least one cylinder together with a drive rod and a piston arranged in each cylinder. Between each cylinder of servo-control and the drive rod of that servo-control, at least one servo-control presents main sealing means with controlled leakage allowing a hydraulic fluid to leak out from the cylinder, the hydraulic system further comprising at least one enclosure, each cylinder of the servo-control being arranged inside the enclosure so that the fluid is collected in the enclosure.
Claims20
A hydraulic system for an aircraft, the hydraulic system comprising at least one servo-control, each servo-control comprising at least one cylinder together with a drive rod and a piston arranged in each cylinder, the drive rod of a servo-control being secured to each piston of the servo-control, the drive rod of a servo-control passing through the corresponding cylinder of the servo-control, at least one servo-control presenting between each cylinder of the servo-control and the drive rod of the servo-control a main sealing means with controlled leakage allowing a leak of a hydraulic fluid out from the cylinder, the hydraulic system including at least one enclosure, each cylinder of the servo-control being arranged inside the enclosure so that the fluid is collected in the enclosure, wherein the hydraulic system includes a cap for surrounding a hub of a rotor, a rotary system directly rotationally coupling an upper end of the enclosure to a lower end of the cap and allowing relative rotary movement between the enclosure and the cap.
A hydraulic system for an aircraft, the hydraulic system comprising:
- an enclosure defining a first cavity surrounded by an upper end of the enclosure;
- a cap defining a second cavity surrounded by a lower end of the cap, the second cavity to receive and surround a hub of a rotor;
- a rotary bearing system directly rotationally coupling the upper end of the enclosure and the lower end of the cap for relative rotary movement between the enclosure and the cap;
- a servo-control having a cylinder with a drive rod and a piston arranged in the cylinder, the drive rod of the servo-control being secured to the piston, the drive rod passing through the cylinder;
- and
- a hydrodynamic bearing positioned between the cylinder and the drive rod of the servo-control, the hydrodynamic bearing allowing leakage thereacross for a controlled leak of a hydraulic fluid out of the cylinder;
- wherein the cylinder of the servo-control is positioned within the enclosure such that the leak of the fluid is collected in the enclosure.
Dependencies are inferred from the claim text.