Top foil plate for hydrodynamic fluid film thrust bearings

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

Patent

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Details

F16C 32/06 (2006.01) F16C 17/12 (2006.01)

Patent

CA 2218058

The top foil (12) of a hydrodynamic fluid film thrust bearing (10) is formed from a single flat annular disk with radial depressions (30) extending from the outer diameter to the inner diameter of the disk that protrude toward the foil plate (16) and define between adjacent depressions a working surface (39) that is configured to complement the foil bumpers (14) attached to the foil plate. The bump foils of the upper foil plate and the bump foils of the lower foil plates can be either in axial alignment or can be displaced relative to each other. When the two sets of bump foils are displaced, the leading edge (31) of the upper bump foils is disposed upstream (relative to the direction of the air stream entering the bump foils) of the leading edge (33) of the lower bump foils.

Le profilé supérieur (12) d'un palier de butée (10) à film de fluide hydrodynamique est formé à partir d'un seul disque annulaire plat présentant des évidements radiaux (30) qui s'étendent du diamètre extérieur au diamètre intérieur du disque et font saillie vers la rondelle profilée (16) et définissent, entre des évidements adjacents, une surface de travail (39) configurée de façon à compléter les éléments amortisseurs profilés (14) fixés à la rondelle profilée. Les bosses de la rondelle profilée supérieure et celles de la rondelle profilée inférieure peuvent se trouver soit en alignement axial, soit être décalées les unes par rapport aux autres. Lorsque les deux ensembles de bosses sont décalés, le bord d'attaque (31) des bosses supérieures est placé en amont (par rapport à la direction du flux d'air pénétrant dans les bosses) du bord d'attaque (33) des bosses inférieures.

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