rotating electrical machine

Abstract

This rotating electrical machine is provided with one end having a first shaft diameter and another end having a second shaft diameter greater than the first shaft size, a rotor being formed using a shaft (21) to one end of which a key groove (34) is provided, wherein the key groove (34) has: a shallow groove (341) as a key fitting groove of a first depth in which a key is fitted; and a deep groove (342) as a balance adjustment groove formed in a manner so as to have a second depth deeper than the first depth and resulting from a partial region of the bottom surface of the shallow groove (341) being dug deeper. Balance adjustment has already been implemented at the shaft (21) alone, so in addition to being able to reduce the man-hours involved in balance correction of the entire rotor, it is possible to prevent the key from inadvertently moving.

Description

technical field [0001] The invention relates to a rotating electric machine. Background technique [0002] In a rotating electric machine, if the center of gravity of the rotor deviates from the rotating shaft, it will cause vibration or the like, and therefore high-precision balance correction is required. The rotor of a rotating electrical machine consists of a shaft, iron core, bearings, etc., and conventional balance corrections have been performed by riveting a weight as a balance weight to the end ring joining portion after the rotor is completed. [0003] However, since the unbalance of individual components such as the shaft and the core is collectively corrected, there is a problem that the amount of correction in the entire rotor increases and the workload increases. In addition, due to the increase in the weight of the balance weight and the lack of the amount of caulking associated with the balance weight, problems such as the fall of the balance weight also occ...

AI Technical Summary

Problems solved by technology

[0003] However, since the unbalance of individual parts such as the shaft and the iron core is corrected collectively, there is a problem that the correction amount in the entire rotor increases and the workload increases.

In addition, due to the increase of the balance weight and the lack of riveting amount accompanying the balance weight, problems such as the fall of the balance weight also occurred.

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