BALANCE CORRECTION DEVICE FOR ROTOR

摘要

An imbalance correction position of a turbine wheel head is irradiated with a laser beam so that an outer peripheral portion of the turbine wheel head is left, and a groove provided by the laser irradiation is provided so that a depth of the groove is shallower toward a side closer to an outer periphery of the turbine wheel head. This makes it possible to secure a strength of a base part of an outer peripheral portion (an outer wall) of the groove, thereby making it possible to restrain deformation of the outer peripheral portion of the groove due to a centrifugal force acting by rotation of the turbine wheel head.

主权项

1. A balance correction device for a rotor, the balance correction device correcting balance of the rotor, the balance correction device comprising:
a rotary drive device configured to rotate the rotor around a rotation axis of the rotor; a laser irradiation device configured to remove a part of the rotor by irradiating the rotor with a laser beam from a rotation-axis direction of the rotor; a rotation angle sensor configured to detect a rotation angle of the rotor; an irradiation position setting device configured to set a laser irradiation position in a radial direction of the rotor; and a controller configured to: (i) control the rotary drive device, the laser irradiation device, and the irradiation position setting device; (ii) irradiate an imbalance correction position of the rotor with the laser beam based on an output of the rotation angle sensor so as to leave an outer peripheral portion of the rotor; and (iii) control a radial position of the laser irradiation position, a rotation speed of the rotor, and a laser output of the laser irradiation device so as to make a groove depth, in the rotation-axis direction, of a groove provided by the laser irradiation shallower toward a side closer to an outer periphery of the rotor.