INSTALLATION OF SHAFT INTO BEARING WITH SELF-REMOVABLE NUT Russian patent published in 2012 - IPC F01D25/16 

FIELD: machine building.

SUBSTANCE: gas turbine engine comprises a shaft, a bearing and a coupling retained with a bearing. The shaft with the help of a journal enters with its end inside the coupling and is fixed in the coupling with a cylindrical nut. The nut is arranged inside the journal with an axial stop in the first direction into the coupling, when the journal is screwed onto the nut. A split stop ring arranged in a circular groove and installed on the external surface of the nut, forms an axial stop at the coupling in a direction, which is opposite to the first one, which makes it possible to realise removal of the journal from the coupling by means of nut unscrewing. The other subject of this invention is the method to assemble a journal of an output part of a high pressure compressor in an engine bearing described above. The method includes the following operations: installation of a nut in a gear wheel coupling, insertion of a stop ring in a nut groove, axial fixation of a nut with a ring, insertion of a compressor journal, nut screwing inside a journal when implementing axial pressure towards an inlet to the journal to the stop. Also the subject of this invention is the method to disassemble the compressor journal from the bearing engine, including the following operations: axial blocking of a journal in an extreme part of the compressor, nut unscrewing until stop of a stop ring against a gear wheel, axial capturing of a nut, nut unscrewing to full exit of the compressor journal end when implementing axial pressure at the journal towards the outlet.

EFFECT: invention makes it possible to facilitate access to a support bearing of a shaft of a high pressure compressor of a gas turbine engine.

12 cl, 13 dwg