Bearing having micropores, and design method thereof

Details Bearing having micropores, and design method thereof Bearing having micropores, and design method thereof

F - Mech Eng,Light,Heat,Weapons

16

C

F16C 33/00 (2006.01) B32B 3/26 (2006.01) F16C 33/10 (2006.01) C21D 1/09 (2006.01)

Patent

CA 2266102

A method for designing bearings, of improved performance, the load-bearing surfaces of which feature micropores (20, 22) about 2 to 10 microns deep and, preferably, aspect ratios on the order of 7 to 20. The hydrodynamic pressure distribution of a suite of bearing surfaces with different micropore geometries and densities is modeled numerically. The load-bearing surfaces of the bearings (13) are fabricated with micropores having the optimal density and geometry determined by the numerical modeling. Conical micropores (20, 22) may be created by single laser pulses, with the pore size and shape controlled by controlling the laser beam profile, the laser beam power, and the optical parameters of the focusing system.

L'invention porte sur un procédé de réalisation de paliers aux performances améliorées dont les surfaces porteuses présentent des micropores (20, 22) d'environ 2 à 10 microns de profondeur et dont l'allongement est de préférence de l'ordre de 7 à 20. La distribution de la pression hydrodynamique d'une suite de surfaces porteuses de géométrie des micropores et de densité différentes est modelisée numériquement. Les surfaces porteuses des paliers (13) sont munies de micropores d'une densité et d'une géométrie optimales déterminées par modélisation numérique. Il est possible de créer des micropores coniques (20, 22) au moyen de simples impulsions laser, la taille et la forme des pores s'obtenant par réglage du profil du faisceau laser, de la puissance du faisceau lasser, et des paramètres optiques du système de focalisation.

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