JOINT ASSEMBLY BETWEEN TRANSMISSION SHAFT AND ROTOR SHAFT OF POWER TURBINE Russian patent published in 2016 - IPC F02C7/36 

FIELD: engines and pumps.

SUBSTANCE: invention relates to gas turbine engines and can be used in designs of joint assemblies between the transmission shaft and the rotor shaft of a power turbine. Joint assembly between the transmission shaft and the rotor shaft of a power turbine includes an annular adapter installed concentrically by means of a spline connection onto the power turbine rotor shaft and coupled via an elastic coupling with the transmission shaft. Power turbine rotor shaft carries radial supports, and inside the said shaft there is a transition bushing contacting by means of outer ring collars at its end parts with the shaft inner surface. On the inner surface of the transition bushing there is an annular spherical groove, which is adjacent to the outer spherical surface of the bushing installed on the transmission shaft. Annular spherical groove is located in a plane maximally close in the axial direction to the plane of one of the radial supports onto the rotor shaft. On the end of the transition bushing, on the side of the power turbine rotor, there is a plug coupled with the transmission shaft.

EFFECT: invention allows reducing mutual dynamic effect of the power turbine rotor and transmission shafts during the engine operation.

1 cl, 3 dwg