Method and apparatus for balancing helicopter rotor blades

Details Method and apparatus for balancing helicopter rotor blades Method and apparatus for balancing helicopter rotor blades

G - Physics

01

M

G01M 1/12 (2006.01) B64C 27/00 (2006.01) B64F 5/00 (2006.01)

Patent

CA 2198718

The rotor blades of a helicopter are balanced both in the chordal direction and in the spanwise direction in a static balancing assembly. The assembly includes a support surface (4) on which there are four weighing scales (8). The scales (8) are positioned in close proximity with the four corners of the rotor blade (2). The scales (8) provide four cooperating pairs of blade spanwise and chordwise balancing reference data. The scales (8) are operably connected to a microprocessor which is preprogrammed with desired balance data for the blades being tested. Deviations from the desired balance data detected by the scales and the microprocessor are corrected by selectively adding or subtracting weight on the blades at appropriate locations of the surfaces thereof.

Dispositif d'équilibrage statique des pales d'un rotor d'hélicoptère relativement à la profondeur du profil d'aile et à la direction de l'envergure, et comportant une surface support (4) munie de quatre balances (8) disposées à proximité des quatre coins de la pale (2) de rotor et fournissant quatre paires coopérantes de données de référence d'équilibrage de la pale relativement à la profondeur du profil d'aide et à l'envergure. Les balances (8) sont reliées de manière active à un microprocesseur préprogrammé avec les données d'équilibrage requises des pales à contrôler. On corrige les écarts de mesure par rapport aux données fournies par les balances et le microprocesseur en ajoutant ou en enlevant des éléments de lestage au niveau de points appropriés de la surface des pales.

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