IMPELLER AND ROTATING MACHINE PROVIDED WITH SAME

摘要

The impeller is provided with: a disc section equipped with a tube section, the grip section of which is fixed by thermal deformation to a rotation shaft that is rotated around the axis line, and a main disc body, which is provided on the other end in the axial direction from the grip section and which extends outward in the radial direction of the rotation shaft; and blade sections that protrude from the main disc body in the axial direction. The disc section is provided with a hoop stress-limiting section, the tube section of which extends further towards the other end in the axial direction than the main disc body.

主权项

1. An impeller comprising:
a tube section having a substantially tube shape, into which a rotary shaft rotated around an axis is inserted, and provided with a grip section installed at one side in an axial direction of the rotary shaft and fixed to the rotary shaft; a disk main body section formed closer to the other side in the axial direction than the grip section and extending from the tube section toward the outside in the radial direction of the rotary shaft; a disk section comprising the tube section and the disk main body section; and a blade section protruding from the disk main body section to the one side in the axial direction, wherein the disk section comprises a hoop stress suppression section extending from the tube section to be closer to the other side in the axial direction than the disk main body section.