ROTOR SHAFT BEARING OF LOW-PRESSURE COMPRESSOR OF TURBOJET ENGINE (VERSIONS), SEALING SPOOL OF ROTOR SHAFT BEARING, ROTOR SHAFT BEARING BLOCK, CONTACT HUB OF ROTOR SHAFT BRACELET SEALING, OIL-CONTROL RING OF ROTOR SHAFT Russian patent published in 2017 - IPC B01J3/00 F04D29/32 F01D5/06 

FIELD: engines and pumps.

SUBSTANCE: invention refers to the area of aircraft engine construction. The rear bearing of the rotor shaft of the low-pressure compressor of the turbojet engine is performed angularly contact and contains coupled drum-disk and cylinder constituents of the rotor shaft, as well as a ball bearing dividing the bearing to stator and rotor parts. The stator part includes a bearing casing performed conjointly with the ball bearing casing in the form of a conical diaphragm detachably connected with the ball bearing flanges and the intermediate engine casing. An internal strong ring is performed for detachable connection with the bracelet sealing casing and ring carriers of labyrinth sealing lids. The rotor part of the bearing includes conjointly performed bottom part of the conical diaphragm of the drum-ring constituent merging into a trunnion of the rotor shaft of the low-pressure compressor detachably connected with the cylinder constituent of the shaft by a hollow cap crew. A multiridge ring element of the labyrinth sealing, the contact hub of the bracelet sealing, and the oil-control ring, as well as the internal ring of the ball-bearing pressed against a support collar of the cylinder constituent of the shaft by the external tightening component with a ring end beam with the formation of an open collector for gathering and supply of lubricating and cooling fluid to rolling bodies of the ball bearing, to the oil-control ring, and to the contact hub of the bracelet sealing via channels in the external surface of the cylinder constituent of the rotor shaft, are installed on the cylinder constituent of the rotor shaft. The contact hub of the bracelet sealing is performed with an oil-return channel of a cooling system of the bearing. The contact hub and the oil-control ring form channels for two successive counter-currently directed flows of an exhaust duct for lubricating and cooling fluid.

EFFECT: invention allows increasing durability of the rotor shaft bearing of the low-pressure compressor, improving operation capabilities of lubricating and cooling system of the rear bearing, and increasing the performance factor of the bearing and operation life of the compressor at whole.

19 cl, 5 dwg