Gas turbine engine rotor construction

摘要

A gas turbine rotor is provided with a longitudinal stack of blade supporting disks each including a medial web and a radially outer rim. The disks are spaced from one another by axial gaps. The disks include recesses in the forward and aft major surfaces thereof proximal to the juncture of the webs and rims thereof. Annular spacers received with the recesses in the disks span the axial gaps and provide a load path for the axial compressive preloading of the disks and the transmission of torque along the disk stack.

主权项

1. A gas turbine engine rotor adapted for rotation about a longitudinal axis thereof, comprising:
a plurality of blade supporting disks mounted by longitudinally compressive preloaded retention in a longitudinal stack: a first disk comprising a medial web and an annular rim disposed at a radial outer portion of said medial web, said web having forward and aft surfaces which, with adjacent radially inner surfaces of said rim, define a pair of major surfaces of said first disk; a second disk adjacent said first disk and separated therefrom by a gap, said second disk comprising a medial web and an annular rim disposed at a radial outer portion of said medial web, said web having forward and aft surfaces which, with adjacent radially inner surfaces of said rim, define a pair of major surfaces of said second disk; said first disk including in a first major surface thereof, and a first recess; said second disk including in a first major surface thereof opposing said first major surface of said first disk, and a second recess; and a spacer having first and second ends received in said first and second recesses respectively of said first and second disks; said spacer spanning said gap and transmitting said compressive preloading from one of said first and second disks to the other of said first and second disks; wherein said first disk rim includes a first shoulder at an edge thereof and a first flange extending longitudinally from said first shoulder of said first disk toward said first major surface of said second disk.