Method for repairing a crack in an electromechanical rotor, method for preventing crack growth in the same, electromechanical rotor and rotary electrical machine

摘要

A method for repairing a crack in an electromechanical rotor ( 10 ), including forming a plurality of slots ( 12 ) on a periphery of a core portion ( 11 ) of an electromechanical rotor ( 10 ) along an axial direction thereof; inserting coils into the slots ( 12 ), respectively; forming a plurality of wedges for maintaining the coils in the slots ( 12 ), respectively; and forming a cut hole ( 20 ) at the core portion ( 11 ) from an outer surface of the core portion ( 11 ) so as to remove at least a deeper area of a crack created at the core portion ( 11 ) at a contacting surface between the corresponding wedge and the corresponding slot ( 12 ).