Center tie rotor annular seal

A turbine engine rotor comprising:

• a central shaft;
• and
• a disk stack having a plurality of disks encircling the shaft and held in compression by tension in the shaft,
• and further comprising:
• means for sealing between the shaft and a disk of the disk stack and applying axial bias between the shaft and the disk, the means comprising an inner piece and an outer piece wherein:
• the outer piece comprises a sleeve passing between an inner diameter surface of the disk and the shaft and axially overlapping a circumferential array of vent holes in the shaft;
• the inner piece extends aft from the shaft to a junction with the outer piece;
• and
• the outer piece extends forward from the junction with the inner piece to a junction with said disk.

A turbine engine rotor seal comprising a two-piece metallic body encircling a central longitudinal axis wherein:

• an outer piece has in central longitudinal half section:
• a first axial end and a second axial end;
• a channel at the first end and open axially toward the second end;
• a sleeve extending from the channel;
• and
• a portion extending radially inward from the sleeve and having a first surface facing toward the first axial end;
• an inner piece has in central longitudinal half section:
• a sleeve having a first axial end and a second axial end, the inner piece sleeve second axial end contacting said first surface;
• and
• a portion extending radially inward from the inner piece sleeve;
• and
• an axial direction from the outer piece first axial end to the outer piece second axial end is the same as an axial direction from the inner piece sleeve first axial end to the inner piece sleeve second axial end.