FRONT SUPPORT OF LOW-PRESSURE TURBINE ROTOR OF TWO-SHAFT GAS TURBINE ENGINE Russian patent published in 2021 - IPC F02C7/06 F01D25/16 

FIELD: machine building.

SUBSTANCE: invention relates to gas turbine engines (hereinafter GTE) of aircraft and ground applications, namely to arrangement of supports for turbo machines rotary at high rotor speed and can be used in most stressed supports. Front support of low-pressure turbine rotor of two-shaft gas turbine engine comprises radial roller bearing, inner ring of which is installed on low-pressure rotor shaft, and outer ring is in bevel gear of conical gear unit with radial clearance therebetween, spring one of ends of which is brought into said radial gap and is equipped on the outer surface side with radial collar in contact with bevel gear inner surface, and on the inner surface side - with a radial collar, made with possibility of contact with external surface of the external ring of the said bearing, wherein the spring is in contact with the high-pressure rotor journal and with the bevel gear by means of splined joints, wherein splines and mating splines of one of said splined joints are made helical in form of multithread thread, turns of which are directed in opposite direction from high-pressure rotor rotation direction with possibility of axial displacement of spring, limited in direction from said bearing by additional radial collar made on outer surface of spring with possibility of its contact with high pressure rotor journal along ends, and in opposite direction - by radial protrusion, made on sector of circumference of inner spring surface with angle less than 180°, with possibility of contact of its conical surface, smaller base of which is directed towards high pressure rotor journal, with section of outer surface of external ring of said bearing, nearby its end on side of high-pressure rotor, in addition, outer ring of said bearing and spring are spring-loaded relative to each other in axial direction.

EFFECT: avoiding the slippage of the inter-shaft roller bearing without radial displacement of the central tapered assembly, thus increasing interchangeability of units and modularity of the turbomachine.

1 cl, 4 dwg