GAS-TURBINE ENGINE INTER-ROTOR SUPPORT Russian patent published in 2005 - IPC

FIELD: mechanical engineering; gas-turbine engines.

SUBSTANCE: invention relates to gas-turbine engine of aircraft and ground application, particularly to supports with bearing arranged between two rotating rotors. Support of two-shaft gas-turbine engine contains bearing installed between shafts of low-pressure and high-pressure rotors, oil space separated from air spaces by seals and provided with oil feed holes made on shafts of low-and high-pressure rotors. Space is formed on inner surface of shaft of high-pressure rotor. Said space is limited by beads from end faces and is connected through holes with ring groove made on inner surface of shaft of high-pressure rotor. Oil feed channels pass from ring groove to both sides, being connected with side ring grooves located in area of end faces of bearing inner race. Oil feed channels are turned to longitudinal axis of shaft at angle of 60-70 degrees for one row, and 110-120 degrees for other row. Vertices of angles formed by intersection of longitudinal axes of channels are pointed to side of rotation of rotor. Through holes are made in inner race of bearing at angle of 40-50 degrees to longitudinal axis of bearing. Oil-feed channels can be made of equal height. Oil feed channels of one row can be displaced circumferentially relative to other row. End faces of nuts locking inner and outer races of bearing can be installed in direct contact with end faces of bearing races. Seals separating oil space from air spaces can be made of graphite, and end faces of nuts locking graphite seals are installed directly in contact with elements of graphite seals. Proposed bearing cooling system improves temperature condition of bearing, reduces axial temperature irregularities of inner and outer races of bearings. Reduced pack of parts decreases runout at tightening of bearing and seals.

EFFECT: improved temperature conditions, reduced runout, improved reliability of support in operation.

5 cl, 3 dwg