Rotor, in particular a helicopter rotor

Details Rotor, in particular a helicopter rotor Rotor, in particular a helicopter rotor

1989-07-21

1990-12-04

Kwon, John T.

Fluid reaction surfaces (i.e., impellers)

Articulated, resiliently mounted or self-shifting impeller...

Nonmetallic resilient mounting

416140, B64C 2751

Patent

active

049750216

ABSTRACT:
A rotor, in particular a helicopter rotor, whereby the movement of the pitch angle of the rotor blade relative to a rotor hub is provided either by a blade neck with torsional flexibility disposed between a blade root and a blade wing or by a blade connection on a rotor hub arm with torsional flexibility. The pitch angle control for the blade is provided by a steering rod coupled to a torsionally stiff blade control casing extending coaxially without making contact along the blade neck or the rotor hub arm up to the blade wing or to the blade root. The control casing is supported on the blade root or rotor hub by at least one brace, which brace, in the longitudinal direction of the blade, has a T-shape. The vertical section of the T-shape is coupled to the blade control casing and the T-base is coupled with torsional flexibility to the blade root or the rotor hub arm, whereby the connection to the base is limited to both of the extremities of the base. Thus, the brace provides both a supporting function for the blade control casing and acts as a torsion bearing that enables rotational movement of the blade control casing and thus change of the blade pitch angle.

REFERENCES:
patent: 4087203 (1978-05-01), Ferris
patent: 4222709 (1980-09-01), Mouille
patent: 4227859 (1980-10-01), Gouzien et al.
patent: 4244677 (1981-01-01), Noehren et al.
patent: 4273511 (1981-06-01), Mouille et al.
patent: 4299538 (1981-11-01), Ferris et al.
patent: 4332525 (1982-06-01), Cheney
patent: 4381902 (1983-05-01), Head et al.
patent: 4427340 (1984-01-01), Metzger et al.
patent: 4676720 (1987-06-01), Niwa et al.
patent: 4690616 (1987-09-01), Hahn et al.
patent: 4778343 (1988-10-01), Hahn et al.

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