Self-scavenging, hybrid lubrication subsystem

Details Self-scavenging, hybrid lubrication subsystem Self-scavenging, hybrid lubrication subsystem

F - Mech Eng,Light,Heat,Weapons

16

H

F16H 57/04 (2010.01) B64C 27/12 (2006.01) F16N 7/18 (2006.01) F16N 7/40 (2006.01)

Patent

CA 2193653

A self-scavenging, hybrid lubrication subsystem for a main transmission gearbox includes a sump that is fabricated as an integral structural extension of the gearbox so that the dynamic fluid level of the lubricating medium in the sump is a predetermined distance above the bottom (18) of the gearbox. The radial discontinuity between the cylindrical (22) and throat segments (26) in combination define a nozzle inlet (28) that is operative to direct outflow of the lubricating medium collected in the bottom of the gearbox to another sump with higher fluid level by means of a nozzle (60). The interaction between the peripheral surface of the rotating annular planetary carrier plate and the structurally-modified side wall of the gearbox exerts a viscous pumping action on the lubricating medium in the flow channels causing the lubricating medium to flow therethrough and being transported through the nozzle (60) to a higher level.

Un sous-système de lubrification hybride, à auto-aspiration, destiné à une boîte de vitesse principale, comprend un carter conçu en tant qu'extension structurelle intégrée à la boîte de vitesse de sorte que le niveau de fluide dynamique du fluide de lubrification dans le carter est placé à une distance prédéterminée au-dessus du fond (18) de la boîte de vitesse. La discontinuité radiale entre les segments cylindriques (22) et les segments de gorge (26) combinés forme un orifice d'admission (28) d'un ajutage, servant à diriger l'évacuation du fluide lubrifiant recueilli au fond de la boîte vers un autre carter présentant un niveau de fluide plus élevé, au moyen d'un ajutage (60). L'interaction entre la surface périphérique de la plaque de support planétaire annulaire rotative et la paroi latérale à structure modifiée de la boîte de vitesse exerce un pompage visqueux sur le fluide lubrifiant dans les canaux d'écoulement, provoquant l'écoulement du fluide lubrifiant à travers ceux-ci et l'acheminement du fluide à travers l'ajutage (60) vers un niveau plus élevé.

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