Snubber bearing mounting assembly for bearingless rotors

B - Operations – Transporting – 64 – C

Patent

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Details

B64C 27/35 (2006.01) B64C 27/51 (2006.01)

Patent

CA 2203012

A mounting assembly (100) is provided for securing a helicopter snubber bearing (70) to a bearingless rotor assembly (10) which includes a flexbeam connector (22) mounted to a torque drive hub member (18). The mounting assembly (100) includes a retainer fixture (102) for mounting a retainer (104) which engages an inner bearing race portion (88) of the snubber bearing (70). The retainer fixture (102) is mounted to the flexbeam connector (22) and includes an inboard end portion (112), a restraint portion (114) extending radially outboard thereof, and a seat portion (116) disposed therebetween. The retainer (104) is disposed in register with, and is compliantly bonded to, the seat portion (116) of the retainer fixture (102), and furthermore abuts the restraint portion (114) which provides redundant retention therefor. Furthermore, the seat portion (116) of the retainer fixture (102) is reduced in width dimension to reduce flap and pitch induced shear stresses.

La présente invention concerne un ensemble de montage (100) permettant de bloquer un palier amortisseur (70) d'hélicoptère sur un ensemble de rotor sans paliers (10) qui comporte une monture de pale (22) à poutre de flexion raccordée au moyeu de transmission de couple (18). L'ensemble de montage (100) comprend une fixation (102) pour patte de retenue, permettant de monter une patte de retenue (104) qui est en contact avec le chemin de roulement intérieur (88) du palier amortisseur (70). La fixation (102) pour patte de retenue, montée sur la monture de pale (22), comprend une extrémité intérieure (112), une partie de retenue (114) radialement opposée vers l'extérieur, et une partie siège (116) disposée entre deux. La patte de retenue (104) est alignée sur la fixation (102) pour patte de retenue à laquelle elle est liée élastiquement. La patte de retenue aboute la partie de retenue (70) qui lui assure une retenue redondante. En outre, la partie siège (116) de la fixation (102) pour patte de retenue présente une largeur réduite pour réduire les contraintes en cisaillement imputables au battement et au pas de la pale.

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