Dynamoelectric machine including insulator and associated methods

A rotor assembly for a dynamoelectric machine comprising:

• a shaft having a main lead receiving recess in an outer surface thereof;
• a rotor mounted to said shaft;
• a main lead insulating assembly lining the main lead receiving recess and comprising
• at least one insulating bottom block, and
• at least one insulating sidewall block secured to said at least one insulating bottom block with at least one interlocking joint;
• and
• a main lead received in the main lead insulating assembly.

A dynamoelectric machine comprising:

• a shaft having a main lead receiving recess in an outer surface thereof and at least one projection receiving recess in the main lead receiving recess;
• a rotor mounted to said shaft;
• a stator surrounding said rotor;
• a main lead insulating assembly lining the main lead receiving recess and comprising
• at least one insulating bottom block comprising at least one projection received in the at least one projection receiving recess, and
• at least one insulating sidewall block secured to said at least one insulating bottom block with at least one interlocking joint;
• and a main lead received in the main lead insulating assembly.

A method for installing a main lead for a rotor assembly comprising a shaft having a main lead receiving recess in an outer surface thereof and a rotor mounted on the shaft, the method comprising:

• lining the main lead receiving recess with a main lead insulating assembly by
• securing at least one insulating bottom block to the shaft so as to restrict at least axial movement, and
• securing at least one insulating sidewall block to the at least one insulating bottom block and extending outwardly therefrom;
• and
• positioning the main lead in the main lead insulating assembly.