초록 ▼

The device comprises, in addition to the conventional non-rotating plate and rotating plate of a swashplates device, a secondary rotating plate which can move in translation with the non-rotating plate but which cannot be inclined, and, for each blade, an articulated link with two levers which are a

The device comprises, in addition to the conventional non-rotating plate and rotating plate of a swashplates device, a secondary rotating plate which can move in translation with the non-rotating plate but which cannot be inclined, and, for each blade, an articulated link with two levers which are articulated together and the first of which is articulated to the secondary rotating plate. The second lever is also articulated to the pitch rod controlling the corresponding pitch lever, and it is moreover articulated to a stationary point of the rotating plate. The inclinations of the plates give rise to angular manoeuvres of the levers of each link in order to actuate the pitch rod and control the pitch of the corresponding blade.

대표청구항 ▼

A device for controlling pitch of blades of a rotorcraft rotor, in which each blade is, firstly, driven in rotation about an axis of rotation of a rotor mast via a hub and, secondly, secured in terms of rotation about a longitudinal pitch-change axis to a pitch lever articulated to a pitch rod joine

A device for controlling pitch of blades of a rotorcraft rotor, in which each blade is, firstly, driven in rotation about an axis of rotation of a rotor mast via a hub and, secondly, secured in terms of rotation about a longitudinal pitch-change axis to a pitch lever articulated to a pitch rod joined to a plate which rotates with the rotor mast and belonging to a swashplates mechanism, in which the rotating plate is mounted to 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 said device comprises a secondary rotating plate secured in terms of rotation to the rotor mast and secured in terms of axial translation to the non-rotating plate but which cannot be inclined with respect to the rotor mast and, for each blade, an articulated link with two levers and four articulations, such that the articulated link\s two levers are articulated together by a first of said articulations, a first of said levers being articulated by a second of said articulations to a point which is stationary in a reference frame which rotates with the secondary rotating plate, and the second lever being articulated to the corresponding pitch rod by a third of said articulations, distinct from the articulation by means of which the pitch rod is articulated to the pitch lever, and the second lever is furthermore articulated to a point which is stationary in a reference frame which rotates with the rotating plate by the fourth articulation which is distinct from the other articulations so that the inclinations given to the swashplates by the actuators give rise to angular maneuvers of the levers of each articulated link controlling the pitch of the corresponding blade through the maneuvering of the corresponding pitch rod.