ANTIFRICTION BEARING WITH OIL DAMPING Russian patent published in 2008 - IPC F16C39/04 F16C19/16 F16C33/66 F01D25/18 

FIELD: mechanical engineering; aircraft engineering.

SUBSTANCE: invention relates to antifriction bearing with lubricating film exposed to pressure and acting according to "forced-out film" type. Proposed antifriction bearing of turbomachine used to form rotary support of first shaft 4 relative to second shaft 6 contains great number of solid of revolution 12 fitted between inner ring holder 14 installed on second shaft 6 and outer ring holder 16 installed on first shaft 4. Inner surface of holder 16 and outer surface of holder 14 limit ring space in between. Bearing contains oil film 18 formed at level of ring surface of contact between holder 16 and shaft 4 and limited from sides by sealing rings 20, 22. Bearing contains also one feed channel 34 passing through holder 14. Channel 34 communicates with oil feed circuit and it comes to level of inner race of solids of revolution 12 to provide their lubrication, and at least one additional channel 38 passing through holder 14 is provided. Channel 38 communicates with oil feed circuit and terminates outside relative to inner race to feed oil through holder 16 to oil film 18 under action of centrifugal force created by rotation of shaft 6. Holder 16 is provided with ring flange 42 forming radial projection pointed inwards ring space. Flange 42 is provided with at least one feed channel 40 beginning mainly opposite to channel 38 and terminating at level of oil film 18.

EFFECT: provision of lubrication and cooling of bearing and damping of vibrations by oil film owing to pressure generation.

6 cl, 2 dwg