Damper device and an aircraft

A damper device provided with a first connection member and with a second connection member that are suitable for connecting the damper device respectively to a first mechanical member and to a second mechanical member, the damper device including a resilient member and a hydraulic system that are interposed between the first connection member and the second connection member, wherein the hydraulic system includes a sealed outer casing containing a hydraulic fluid, the hydraulic fluid being contained solely in the hydraulic system, the hydraulic system including a rod movable in translation relative to the outer casing, the rod extending longitudinally from a first end to a second end along a longitudinal axis, the rod having a projecting portion that projects longitudinally from the outer casing, the first connection member being fastened in reversible manner to the outer casing in order to be constrained to move in translation with the outer casing, the resilient member being arranged around the projecting portion of the rod, the resilient member including at least one resilient means interposed between a first strength member and a second strength member, the resilient member and the hydraulic system being two distinct modules, the first strength member being fastened in reversible manner to the outer casing in order to be constrained to move in translation with the outer casing, the second strength member being constrained to move in translation with the projecting portion, the resilient member being fastened in reversible manner to the projecting portion;

• wherein the second strength member has a radial projection that is held longitudinally between a longitudinal abutment of the rod and a longitudinal end of the second connection member.

A damper device provided with a first connection member and with a second connection member that are suitable for connecting the damper device respectively to a first mechanical member and to a second mechanical member, the damper device including a resilient member and a hydraulic system that are interposed between the first connection member and the second connection member, wherein the hydraulic system includes a sealed outer casing containing a hydraulic fluid, the hydraulic fluid being contained solely in the hydraulic system, the hydraulic system including a rod movable in translation relative to the outer casing, the rod extending longitudinally from a first end to a second end along a longitudinal axis, the rod having a projecting portion that projects longitudinally from the outer casing, the first connection member being fastened in reversible manner to the outer casing in order to be constrained to move in translation with the outer casing, the resilient member being arranged around the projecting portion of the rod, the resilient member including at least one resilient means interposed between a first strength member and a second strength member, the resilient member and the hydraulic system being two distinct modules, the first strength member being fastened in reversible manner to the outer casing in order to be constrained to move in translation with the outer casing, the second strength member being constrained to move in translation with the projecting portion, the resilient member being fastened in reversible manner to the projecting portion;

• wherein the hydraulic system includes a piston longitudinally defining two hydraulic chambers within an internal space arranged in the outer casing;
• wherein the hydraulic system has a compensation chamber associated with the hydraulic chambers, the compensation chamber being defined by a plug that is movable in translation and that co-operates with a resilient system;
• and
• wherein the compensation chamber and the plug are housed within the rod, each hydraulic chamber being in fluid flow communication with a compensation volume via a passage formed in the rod, the compensation volume being separated from the compensation chamber by the plug.