Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Nonmetallic resilient mounting
Patent
1994-04-07
1995-12-12
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
Articulated, resiliently mounted or self-shifting impeller...
Nonmetallic resilient mounting
416141, B64C 2735
Patent
active
054744245
ABSTRACT:
This invention relates to a rotorcraft rotor head which includes an even number of blades arranged in groups of two blades (2) which are diametrically opposed to each other, and linked to each other by a connection system without any link with the rotor hub. Each blade (2) is articulated in flapping and in pitch on the hub body (1) by a sleeve (3) which is arranged between the root of the blade (2) and the hub body (1). The sleeve (3) bears against the periphery of the hub body (1) by a laminated spherical stop (5) and includes an introduction member for controlling the pitch of the blade (2). Each system for connecting two diametrically opposed blades (2) is comprised of two tie rods (4) which link the two diametrically opposed sleeves (3) of the blades (2). The two tie rods (4) are arranged parallel to the plane of the rotor on either side of the longitudinal axis which is common to the two diametrically opposed blades ( 2). The two tie rods (4) are parallel and substantially spaced apart with respect to the common longitudinal axis. The member which fastens the two tie rod (4) to each sleeve (3) is arranged on the outside of the laminated spherical stop (5) of the sleeve (3) with respect to the rotor axis such that the length of the two tie rods (4) is significantly greater than the distance between the centers of the two diametrically opposed laminated spherical stops (5).
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Derwent Abstract of German Patent Application 2 638 148.
Derwent Abstract of German Patent Application 2 945 195.
Bietenhader Claude
Suzzi Robert J.
Aerospatiale - Societe Nationale Industrielle
Larson James A.
Look Edward K.
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