Device for damping lead-lag motion of rotor blades of a helicopter

摘要

The mechanism includes the blades (1,2) of a rotor mounted on supports (4,5) which are linked to a central hub (3). Between two adjacent blades, there are three levers (6,10,13) which are hinged by ball and socket joints onto the rotor supports and hub. Two of the levers pivot on the third about pivot axes (16,17) which are parallel to each other and perpendicular to the common plane passing through the centres of the ball and socket joints. At least one of the levers comprises at least one damper (7). The position of the third lever is such that it lies radially w.r.t. the hub on which the rotor blades are mounted. The two axes on which the first and second levers join the third can be coincident.