초록 ▼

The device for controlling the pitch of the blades of a rotor using a mechanism having swashplates includes an auxiliary plate mounted on the non-rotating plate of the mechanism and which is secured in terms of rotation to the rotating plate of this mechanism and, for each blade, an articulated link

The device for controlling the pitch of the blades of a rotor using a mechanism having swashplates includes an auxiliary plate mounted on the non-rotating plate of the mechanism and which is secured in terms of rotation to the rotating plate of this mechanism and, for each blade, an articulated link in series with the corresponding pitch rod to which it is articulated, and including at least one arm articulated to the rotating plate, each articulated link being controlled by a lever articulated to it and to the auxiliary plate which is off-centered to the desired value so that each of the control levers controls the itch of the corresponding blade by applying a bicyclic component to it, the amplitude and phase of which component depend on the eccentricity of the auxiliary plate as defined with respect to the non-rotating plate.

대표청구항 ▼

A device for controlling pitch of blades of a rotorcraft rotor, in which each blade is, on the one hand, driven in rotation about an axis of rotation of a rotor mast via a hub and, on the other hand, secured in terms of rotation about a longitudinal pitch-change axis to a pitch lever controlled by a

A device for controlling pitch of blades of a rotorcraft rotor, in which each blade is, on the one hand, driven in rotation about an axis of rotation of a rotor mast via a hub and, on the other hand, secured in terms of rotation about a longitudinal pitch-change axis to a pitch lever controlled by a pitch rod joined to a plate which rotates with the rotor mast and belongs to a swashplates mechanism, in which the rotating plate is mounted so that it can rotate on a non-rotating plate which can slide axially along the rotor mast and be inclined in any direction with respect to the rotor mast under the action of flight-control actuators, wherein the device comprises: an auxiliary plate, secured in terms of rotation to the rotating plate and mounted so that it can rotate with defined eccentricity on the non-rotating plate, and for each blade, an articulated link which comprises at least one arm via which the link is joined to the rotating plate by a first articulation and which link is mounted in series with the corresponding pitch rod, the link being joined to this pitch rod by a second articulation separate from the first articulation, and by a third articulation via which the articulated link is joined to a control lever, which is articulated to the rotating and eccentric auxiliary plate so that the rotation of the latter induces, via each control lever, angular movements of each arm of the corresponding articulated link, which moves the corresponding pitch rod so as to control the pitch of the corresponding blade.