| 摘要 |
<p>An impeller (10) comprises a disk section (30) comprising a tube section (32) having a tube shape, into which a rotary shaft (5) rotated around an axis (0) is inserted, and a disk main body section (35) extending from the tube section (32) toward the outside in the radial direction of the rotary shaft (5), and a blade section (50) protruding from the disk main body section (35) in an axial direction, wherein the disk section (30) comprises a thick wall section (50) being formed so as to extend the tube section (32) toward one side in the axial direction relative to the disk main body section (35), wherein the thick wall section (50) is formed so that the thickness (T1) in the radial direction is thicker than the thickness of the tube section (32) located closer to the other side in the axial direction than the disk main body section (35), and from the disk main body section (35) toward the one side in the axial direction, the thickness (T1) of the thick wall section (50) gradually decreases from the outside in the radial direction of the disk section (30) toward the inside therein.</p> |
