Compliant support for increased load capacity axial thrust...

F - Mech Eng,Light,Heat,Weapons – 16 – C

Patent

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Details

F16C 17/12 (2006.01) F16C 27/06 (2006.01)

Patent

CA 2509931

A compliant support for an axial thrust air bearing between a shaft and a housing with an annular thrust runner extending radially from the shaft having a runner bearing surface. The housing has a housing bearing surface and an air inlet in communication with a source of pressurized air. An annular foil support sleeve is disposed on the housing bearing surface, having an air foil surface with an array of foils. The foils serve to conduct air from the air inlet forming a pressurized air curtain between the runner bearing surface and foils on the the sleeve and is then disposed of through an air outlet. The sleeve has a compliant surface with at least one compliant annular ring. The compliant surface includes at least one compliant annular ring such as a fluorocarbon O-ring for low temperature service under 300 F; (149 C); a fluorosilicon O-ring for mid-range temperature service 300-600 F (149-298 C); or a metallic mesh ring for high temperature service over 600 F (298 C).

L'invention concerne un support compliant destiné à un palier de butée axiale à air entre un arbre et un logement doté d'une roue de palier annulaire s'étendant radialement de l'arbre à surface de palier de roue. Le logement présente une surface de palier de logement et une entrée d'air en communication avec une source d'air pressurisée. Un manchon de support de feuille annulaire est placé sur la surface de palier de logement munie d'une surface de feuille d'air avec un réseau de feuilles. Les feuilles permettent de conduire de l'air provenant d'une entrée d'air formant un rideau d'air pressurisé entre la surface de palier de roue et des feuilles sur le manchon, et la feuille est disposée à travers une sortie d'air. Le manchon présente une surface compliante avec au moins un joint annulaire compliant. La surface compliante comporte au moins un joint annulaire compliant, tel qu'un joint torique au fluorocarbone pour un service à basse température inférieure à 300 F (149C), un joint torique au fluorosilicium pour un service à température moyenne allant de 300 à 600 F (149-298 C) ou un joint entrelacé métallique pour un service à température élevée supérieure à 600 F (298 C).

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