Hanging spring supported squeeze film damping system for...

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

Patent

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Details

F16C 39/04 (2006.01) F16C 27/02 (2006.01)

Patent

CA 2252906

A damper film bearing assembly (10) for supporting a rotatable shaft (11) of a turbomachine includes a housing (22) having a central bore sized to receive the bearing member, and an annular cavity (34) formed within the housing around the central bore. The annular cavity (34) includes an outer wall (36) that is concentric with the central bore. A bearing member (35) having an annular outer surface and an inner bearing surface is mounted within the cavity and engages the shaft (11) to support the shaft within the housing. A fluid film damper mechanism (55) acts between the annular outer surface (39) and the outer wall of the cavity (36) for damping radial movement of the bearing member within the cavity. A resiliently adjustable dead weight hanging spring support system (61, 62) acts between the housing and the bearing member to support the dead weight of the shaft within a vertically centered position within the central bore so that the fluid film damper means functions to maintain the shaft centered within the bore when vibrations occur during rotation of the shaft.

Ensemble formant palier (10) à film amortisseur assurant le maintien de l'arbre rotatif (11) d'une turbomachine, et comprenant un carter (22) pourvu d'un alésage central dimensionné de manière à recevoir l'élément de palier, et une cavité annulaire (34) ménagée dans le carter et autour de l'alésage central. Cette cavité annulaire (34) comprend une paroi externe (36) qui est concentrique à l'alésage central. Un élément de palier (35) présentant une surface externe annulaire et une surface d'appui interne est monté dans la cavité et coopère avec l'arbre (11) de manière à porter ce dernier à l'intérieur du carter. Un mécanisme amortisseur (55) à film fluide situé entre la surface externe annulaire (39) et la paroi externe de la cavité (36) amortit le mouvement radial de l'élément de palier à l'intérieur de la cavité. Un système de support (61, 62) de contrepoids à élasticité réglable du type à ressort suspendu est placé entre le carter et l'élément de palier pour porter le contrepoids de l'arbre dans une position centrée verticalement à l'intérieur de l'alésage central, de sorte que l'amortisseur à film fluide maintienne l'arbre centré dans l'alésage lorsque des vibrations se produisent pendant la rotation de l'arbre.

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