Linear actuation device and associated aircraft rotor test bench

Abstract

The present invention relates to a linear actuator (1) comprising a main actuator (11) having a main body (12) and a main rod (13) movable with at least one translational degree of freedom relative to said main body (12). According to the invention, the linear actuator (1) includes a backup system (20) configured to, in a nominal operating mode of the linear actuator (1), allow movement of the main rod (13) relative to the main body (12) and, in a backup operating mode of the linear actuator (1), return and then hold the main rod (13) in a predetermined safe position (PREF). (Shortcut figure: Figure 2)

Claims

claims 1 to 11, and in that, during a rotational movement of said rotor (3), said at least one linear actuation device (1) is configured to, in said nominal operating mode, vary a pitch of the blades (5) of said rotor (3) relative to said hub (4) and, in said emergency operating mode, to maintain said pitch of said blades (5) of said rotor (3) towards a predetermined value. [Fig. 2] AX1 z"AX3 in Fiq.3 [Fig. 4] Fig. 4 [Fig. 7] [Fig. 8] [Fig. 9] Fig. 9

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