Rotary-wing aircraft torque coupling with pad bearings

Details Rotary-wing aircraft torque coupling with pad bearings Rotary-wing aircraft torque coupling with pad bearings

B - Operations, Transporting

64

C

B64C 27/35 (2006.01)

Patent

CA 2662833

A torque coupling for a rotor head of a rotary-wing aircraft is configured for rotation with a mast and for causing rotation of an attached yoke. The coupling has trunnions that rotate with the mast and extend generally radially. Pad-bearing assemblies each have a central member coupled to one of the trunnions with a laminated spherical bearing and have laminated pad bearings affixed to opposing sides of the central member. The laminated bearings have alternating rigid and elastomeric layers. A bearing mount is affixed to each pad bearing and is connected to a yoke for rotating the yoke with the mast. The pad-bearing assemblies allow for relative motion between each central member and the associated trunnion and between each central member and the bearing mounts through elastic shear deformation, and this allows for gimballing of the attached yoke relative to the mast.

L'invention concerne une transmission de couple pour une tête de rotor d'un giravion, qui est configurée pour une rotation avec un mât et pour provoquer la rotation d'une fourche attachée. La transmission a des tourillons qui tournent avec le mât et s'étendent généralement radialement. Des ensembles de paliers à patins ont chacun un élément central couplé à l'un des tourillons avec un palier sphérique laminé et ont des paliers à patins laminés fixés aux côtés opposés de l'élément central. Les paliers laminés ont des couches rigides et élastomères alternées. Un support de palier est fixé à chaque palier à patin et est connecté à une fourche pour faire tourner la fourche avec le mât. Les ensembles de paliers à patins permettent un mouvement relatif entre chaque élément central et le tourillon associé et entre chaque élément central et les supports de palier par une déformation par cisaillement élastique, et ceci permet un montage par cardan de la fourche attachée par rapport au mât.

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