Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Nonmetallic resilient mounting
Patent
1995-12-18
1998-08-04
Verdier, Christopher
Fluid reaction surfaces (i.e., impellers)
Articulated, resiliently mounted or self-shifting impeller...
Nonmetallic resilient mounting
416140, 416141, 416168R, 416230, B64C 2733, B64C 2739
Patent
active
057884625
ABSTRACT:
A hingeless rotor including a rotor mast driven in rotation about an axis of the rotor, a hub secured in terms of rotation to the mast, and at least two blades, each of which is, firstly, joined to the hub by a root attachment part comprising at least one arm which can twist about a longitudinal pitch-change axis of the blade and, secondly, equipped with a cuff which is rigid in torsion, surrounding the at least one twistable arm, and the radially external part of the cuff, with respect to the rotor axis is secured in terms of torsion to the blade and to the twistable arm about the pitch-change axis, while the radially internal part of the cuff surrounds, without contact, the at least one twistable arm and exhibits a pitch lever projecting towards the outside of the cuff and joined to a pitch-control rod, wherein, for each blade, an intermediate pitch-control ring which is rigid in terms of torsion about the corresponding pitch-change axis, and which surrounds the corresponding at least one twistable arm is arranged substantially between the hub and the radially internal part of the corresponding cuff, the ring being joined to the hub and the radially internal part of the corresponding hub by two ball joints, the first one of which articulates the ring to the hub and the second one of which articulates the ring to the cuff.
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Antomarchi Philippe Maurice Paul
Legendre Philippe Maurice Rene
Manfredotti Thomas Pierre Louis
Eurocopter France
Verdier Christopher
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