| 摘要 |
An air cooled bearing assembly 10 comprises means 28 for imparting a swirl component to cooling air flowing towards the bearing 14. The means 28 for imparting the swirl may comprise a vane or a plurality of vanes which may be fixed or rotatable in relation to a bearing support 24. The bearing 14 preferably includes a cage 22 for retaining rolling elements 20 of the bearing 14 and the means 28 for imparting a swirl component is arranged so that the swirl direction of the cooling air is in the same direction as the rotation of the bearing cage 22 and so that the velocity of the swirl is the same as the rotational velocity of the bearing cage 22. Total loss oil lubrication means may be included in the bearing 14 and the bearing assembly 10 is preferably for use in a gas turbine engine.
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