ANNULAR COVER FOR A TURBOMACHINE LUBRICATION CHAMBER AND A TURBOMACHINE COMPRISING SUCH A COVER Russian patent published in 2018 - IPC F01D25/16 F01D25/18 

FIELD: machine building.

SUBSTANCE: annular cover for a lubrication chamber of a rotary bearing of a turbomachine includes a wall that is generally circular and flared with an orifice at one end intended to receive a transmission shaft and a cover assembly surface at the other end. Annular cover also comprises at least one oil duct communicating with the inside of the cover wall. Oil duct extends along the wall as far as the assembly surface and most of said oil duct is positioned outside the wall of the annular cover. Another invention of the group relates to a turbomachine comprising the above-mentioned annular cover for a lubrication chamber, as well as a compressor, a turbine, a transmission shaft, connecting the compressor to the turbine, an intermediate fan casing, bearing joining the transmission shaft to the intermediate casing, casing of the lubricating chamber, sealed to the intermediate fan casing and forming an annular opening located around the transmission shaft in the axial direction. Annular cover of the chamber is mounted on the casing of the chamber to close the axial annular opening.

EFFECT: group of inventions allows strengthening the annular wall of the cover, increasing rigidity thereof and reducing the weight.

15 cl, 7 dwg