Oil annulus to circumferentially equalize oil feed to inner...

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

Patent

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Details

F16C 33/66 (2006.01) F16C 33/58 (2006.01) F16C 37/00 (2006.01)

Patent

CA 2444061

A ball bearing assembly (10) whereby the inner ring (16) is split into a loaded half (18) and a non-loaded half (19). The cage lan ds (48,50) on the inner ring halves (18,19) support the cage ring (30). An annular groove (34) having a non-rectangular cross-section is disposed at the inner ring bore and at the split face (22). A plurality of radial grooves (44) extend in the split face (22) of one inner ring half (18,19) to form radial passages between the annular groove (34) and the inner race (26) for directing oil under centrifugal forces collected in the annular groove (34), into the inner race (26). The bottom section of the annular groove (34) acts as a reservoir (38) to feed all the radial passages (44) as well as provide a longer residence time for the oil on loaded inner ring surfaces. The annular reservoir (38) circumferentially equalizes the oil supply to the radial split face passages (44) and increases heat transfer to the oil since it is located in the loaded inner ring half (18) where substantial frictional heat generation occurs. As a result, a preferential cooling of the loaded half (18) of the inner ring (26) is provided. The invention can be broadly applied to cool and lubricate rotating parts in rotary machines, especially in high speed applications.

L'invention concerne un assemblage de roulement à billes (10) dont la bague intérieure (16) est divisée en une moitié chargée (18) et une moitié non chargée (19). Une cage repose (48, 50) sur les moitiés de bague intérieure (18, 19) qui supportent la bague de la cage (30). Une rainure annulaire (34) possédant une section transversale non rectangulaire est placée au niveau de l'alésage de la bague intérieure et au niveau de la face divisée (22). Plusieurs rainures radiales (44) s'étendent dans la face divisée (22) d'une moitié de la bague intérieure (18, 19) afin de former des passages radiaux entre la rainure annulaire (34) et la bague intérieure (26) en vue d'entraîner l'huile avec des forces centrifuges recueillies dans la rainure annulaire (34), dans la bague intérieure (26). La section inférieure de la rainure annulaire (34) agit comme un réservoir (38) afin d'alimenter tous les passages radiaux (44) et afin de fournir un temps de séjour plus long à l'huile se trouvant sur les surfaces de la bague intérieure chargée. Le réservoir annulaire (38) compense la périphérie de l'alimentation en huile dans les passages de la face divisée radiale (44) et augmente le transfert de chaleur de l'huile lorsqu'il se situe dans la moitié de bague intérieure chargée (18) où la génération principale de chaleur de frottement a lieu. Il en résulte, que la moitié chargée (18) de la bague intérieure (26) est refroidie de façon préférentielle.

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