F - Mech Eng,Light,Heat,Weapons – 16 – C
Patent
F - Mech Eng,Light,Heat,Weapons
16
C
F16C 19/14 (2006.01) F16C 19/16 (2006.01) F16C 19/54 (2006.01) F16C 33/32 (2006.01) F16C 33/62 (2006.01)
Patent
CA 2384710
The invention concerns a ball bearing (3) in rolling contact between the inner bearing groove (4) of an outer ring (5) and the outer bearing groove (6) of an inner ring (7), the concavity of the grooves not oriented radially but substantially inclined opposite each other, and the balls (3) are spaced apart from one another by a cage (13) arranged between the rings (5, 7), the balls (3) being made of ceramic, at least at the surface, and the rings (5, 7) made of steel being coated with a MoSx or TiAlN layer deposited by cathode spraying. The invention is applicable to ball-bearing axial stops, in particular for retaining rotor blades against centrifugal forces and for blade pitch change hinge relative to the hubs of rotors.
Le roulement comprend des billes (3) en contact roulant entre des gorges de roulement intérieure (4) d'une bague extérieure (5) et extérieure (6) d'une bague intérieure (7), la concavité des gorges n'étant pas orientée radialement mais inlcinée sensiblement en regard l'une de l'autre, et les billes (3) sont espacées les unes des autres par une cage (13) disposée entre les bagues (5, 7), les billes (3) étant en céramique, au moins en surface, et les bagues (5, 7) en acier étant revêtues d'une couche de MoSx ou de TiAIN déposée par pulvérisation cathodique. Application aux butées axiales à billes, notamment pour la retenue des pales de rotor contre les forces centrifuges et l'articulation en pas des pales par rapport aux moyeux des rotors.
Bibet Alain Jean
Cahez Jean-Pierre Andre
Goudreau Gage Dubuc
Snfa
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