Foil thrust bearing with varying circumferential and radial...

Details Foil thrust bearing with varying circumferential and radial... Foil thrust bearing with varying circumferential and radial...

F - Mech Eng,Light,Heat,Weapons

16

C

F16C 17/12 (2006.01)

Patent

CA 2360772

An improved foil thrust bearing having a thrust runner and a thrust plate includes an underspring element positioned adjacent to the thrust plate. The underspring element comprises, in one embodiment, a plurality of alternating first apertures and spring portions, with at least one spring portion having a periodic configuration and comprising a leading edge and a trailing edge. The periodic configuration is defined by a plurality of pitches that vary between the leading and trailing edges. Also defining the periodic configuration is a plurality of periodic elements that vary in longitudinal length between the leading and trailing edges. A thrust bearing disk is disposed intermediate the underspring element and the thrust runner. The disk comprises a plurality of transition areas that provide a stepped configuration to the disk. The transition areas match a plurality of circumferential positions of the first apertures in the underspring.

L'invention concerne un palier de poussée amélioré à coussinets plats comportant un galet de poussée et un plateau de poussée qui comprend un élément à ressort adjacent au plateau de poussée. Dans un mode de réalisation, l'élément à ressort comprend plusieurs ouvertures et parties ressorts qui s'alternent, avec au moins une partie ressort possédant une configuration périodique ainsi qu'un bord avant et un bord arrière. La configuration périodique est définie par plusieurs pas qui varient entre les bords avant et arrière. Cette configuration périodique est également définie par des éléments périodiques dont la longueur longitudinale varie entre les bords avant et arrière. Un disque du palier de poussée est placé entre l'élément ressort et le galet de poussée. Ce disque comprend plusieurs zones de transition qui lui confèrent une configuration à gradins. Les zones de transitions correspondent à plusieurs positions des premières ouvertures sur la circonférence de l'élément ressort.

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