Impeller, and rotating machine provided with same
View Patent ↗The invention includes a disc-shaped disc section ( 30 ) that is attached to a rotating shaft ( 6 ), and blade sections ( 40 ) that are provided on a front surface ( 31 ) that is one side in an axial direction of the disc section ( 30 ). Balance holes ( 33 ) for attaching weight-adjusting weight members W thereto are provided at positions where the blade sections ( 40 ) are provided in a radial direction, in a rear surface ( 51 ) that is the other side in the axial direction of the disc section ( 30 ).
1. An impeller comprising:
a disc-shaped disc section that extends from a tube portion attached to a rotating shaft and extends radially outward from the tube portion; and
a blade section that is provided in a front surface that is one side in an axial direction of the disc section, wherein
the disc section is provided with an attachment hole for attaching a weight-adjusting weight, in a rear surface that is the other side in the axial direction of the disc section, and
the disc section includes a stress-relaxing device provided on at least one radial side of the attachment hole in the rear surface to relax stress concentration caused by a centrifugal force in the attachment hole.
2. The impeller according to claim 1 , wherein
the stress-relaxing device includes an axial wall portion on at least one radial side of the attachment hole that diverts a radial stress in a meridian plane.
3. A rotating machine comprising:
a rotor having the impeller according to claim 1 .
4. A rotating machine comprising:
a rotor having the impeller according to claim 2 .