Spacer for a helicopter main rotor shaft

B - Operations – Transporting – 64 – C

Patent

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Details

B64C 27/32 (2006.01) B64C 27/12 (2006.01) F16C 35/06 (2006.01) F16C 35/063 (2006.01)

Patent

CA 2178923

A spacer (100 for a helicopter main rotor shaft (102) is mounted in combination with the main rotor shaft (102) and is operative to support the inner race (116) of the upper bearing assembly (110) of the main rotor shaft (102) and is concomitantly operative to restrain axial migration of the inner race (116). One preferred embodiment of the spacer (10) comprises a body member (11) having a stepped configuration defined by an upper cylindrical segment (12) and a lower cylindrical segment (20) to accommodate the outer structural envelope of the main rotor shaft (102). Structural continuity between the upper and lower cylindrical segments (12, 20) is provided by a lower annular collar (18) and an interface annular collar (22) and a plurality of reaction spokes (30) that extend between the upper annular collar (14) and the bottom annular collar (24).

Une pièce d'écartement (10) destinée à un arbre (102) de rotor principal d'hélicoptère est montée en association avec l'arbre (102) du rotor principal et sert à supporter la voie de roulement intérieure (116) de l'ensemble palier supérieur (110) de l'arbre (102) du rotor principal tout en limitant le déplacement axial de ladite voie de roulement intérieure (116). Dans une forme de réalisation préférée, la pièce d'écartement (10) est constituée d'un corps (11) présentant une configuration étagée définie par des segments cylindriques supérieur (12) et inférieur (20) afin de s'adapter à l'enveloppe structurale externe de l'arbre (102) du rotor principal. La continuité structurale entre les segments cylindriques supérieur et inférieur (12, 20) est assurée par un collier annulaire inférieur (18) et un collier annulaire d'interface (22) ainsi que par une pluralité de rayons de réaction (30) qui s'étendent entre le collier annulaire supérieur (14) et le collier annulaire inférieur (24).

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