BALANCE CORRECTION DEVICE FOR ROTOR

摘要

A single-body balance correction range in which a weight has been removed by single-body balance correction performed on a turbine wheel (a rotor) as a single body is calculated, an assembly balance correction range is calculated in an assembled state of the turbine wheel, and assembly balance correction is performed in a case where the single-body balance correction range and the assembly balance correction range overlap each other, such that an outermost diameter of an arc-shaped assembly-balance correction groove provided by removal of an inner part of a turbine wheel head is smaller than a remaining height a of the single-body balance correction range. By such a correction process, it is possible to perform weight removal for assembly balance correction by excluding a range in which the weight has been removed by the single-body balance correction, thereby making it possible to restrain an indicated value of a weight removal amount from deviating from an actual weight removal amount.

主权项

1. A balance correction device comprising:
a controller configured to:
(i) calculate a single-body balance correction range in which a weight has been removed by single-body balance correction performed on a rotor as a single body;(ii) calculate an assembly balance correction range in an assembled state of the rotor;(iii) calculate a remaining height of the single-body balance correction range from a rotation center of the rotor;(iv) perform assembly balance correction such that an inner part of the rotor relative to an outer peripheral edge of the rotor is removed in an arc shape around the rotation center of the rotor; and(v) perform assembly balance correction in a case where the single-body balance correction range and the assembly balance correction range overlap each other, such that an outermost diameter of an arc-shaped assembly-balance correction groove provided by the removal of the inner part of the rotor is smaller than the remaining height of the single-body balance correction range.