Pressurized ball bearing assemblies

Details Pressurized ball bearing assemblies Pressurized ball bearing assemblies

F - Mech Eng,Light,Heat,Weapons

01

D

F01D 25/16 (2006.01) F01D 25/18 (2006.01) F04D 29/04 (2006.01)

Patent

CA 2172291

The invention relates to pressurized bearing assemblies (16, 18) for turbomachines like gas turbine engines. According to the invention, pressurized oil is used to apply an axial force to the outer bearing race (20) of a ball-bearing assembly (16). The force is transmitted through the race of the ball bearings (24) and to the inner race (22) of the bearing assembly, and is further transmitted, via the engine shaft (12), to the bearing (18) of another, axially spaced-apart bearing assembly. The force moves the balls (24, 30) in both assemblies (16, 18) into line-on-line running contact with their respective bearing races (20, 22, 26, 28) and minimizes vibration in the assemblies.

L'invention se rapporte à des ensembles paliers sous pression (16, 18) pour des turbomachines telles que des turbines à gaz. Selon cette invention, de l'huile sous pression est utilisée pour appliquer une force axiale sur le chemin de roulement externe (20) d'un ensemble palier à billes (16). Ladite force est transmise à travers le chemin de roulement aux paliers à billes (24) ainsi qu'au chemin de roulement interne (22) de l'ensemble, puis est transmise, à travers l'arbre (12) du moteur, au palier (18) d'un autre ensemble palier axialement espacé du premier. Cette force déplace les billes (24, 30) des deux ensembles (16, 18) de façon qu'elles entrent en contact de roulement ligne sur ligne avec leurs chemins de roulement respectifs (20, 22, 26, 28) et minimise toute vibration produite dans lesdits ensembles.

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