Anti-vibratory device with rotary compensation weights
AssigneeEurocopter
InventorsThomas Manfredotti, Damien Sequera
Life of this patent
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Abstract
An anti-vibratory device with rotary compensation weights includes two sets of two identical rotors with respective eccentric compensation weights, the units being symmetrically disposed in relation to an axis of symmetry and the axes of rotation of the rotors being parallel between themselves and orthogonal in relation to the axis of symmetry; and a rotational drive system for the rotors. Advantageously, the device includes controllable mobile equipment carrying the drive system and being able to slide along the axis of symmetry in order to drive the dephasing of the rotors with eccentric compensation weights associated with the sets.
Claims20
An antivibration device configured for an airframe or a helicopter, comprising:
- at least two sets (2, 3) each comprising two identical rotors (4, 5;
- 6, 7) having respective eccentric flyweights (4A, 5A;
- 6A, 7A), said sets being disposed symmetrically about an axis of symmetry, and axes of rotation of said rotors being parallel to one another and orthogonal to said axis of symmetry;
- a drive system (8) for setting said rotors into rotation;
- controllable moving equipment (11) carrying said drive system (8) and capable of sliding along said axis of symmetry to vary a phase offset between the eccentric flyweight rotors of the sets, the phase offset being a function of a vibration that needs to be absorbed, said drive system (8) comprising a single motor (12) for rotating said rotors, having its axis disposed perpendicularly to said axis of symmetry, and driving an endless connection passing around said rotors (4, 5;
- 6, 7) so that a plurality of lengths of strands of the connection passing through said sets are equal,
- wherein the antivibration device is fitted to the airframe or the helicopter.
An antivibration device configured for an airframe or a helicopter, comprising:
- two sets (2, 3) each comprising two identical rotors (4, 5;
- 6, 7) having respective eccentric flyweights (4A, 5A;
- 6A, 7A), said sets being disposed symmetrically about an axis of symmetry, and axes of rotation of said rotors being parallel to one another and orthogonal to said axis of symmetry;
- a drive system (8) for setting said rotors into rotation;
- controllable moving equipment (11) carrying said drive system (8) and capable of sliding along said axis of symmetry to vary a phase offset between the eccentric flyweight rotors of the sets, the phase offset being a function of a vibration that needs to be absorbed, said drive system (8) comprising a single motor (12) for rotating said rotors, the single motor (12) being disposed between the two sets and having its axis disposed perpendicularly to said axis of symmetry, and driving an endless connection passing around said rotors (4, 5;
- 6, 7) so that a plurality of lengths of strands of the connection passing through said sets are equal,
- wherein the antivibration device is fitted to the airframe or the helicopter.
Dependencies are inferred from the claim text.