Hermetic motor compressor and method assembling the same

A method of assembling hermetic motor compressor having:

• a main shaft constructed at one end of a crankshaft for rotatory driving a orbiting scroll member in engagement with a stationary scroll member, said orbiting scroll member forming a plurality of compression spaces;
• a compression mechanism having a main bearing supporting said main shaft in a freely rotatable manner;
• a motor comprising a rotor fixed to said main shaft, and a stator having a stator winding wound on an iron core with an electrical insulator;
• an auxiliary bearing supporting a distal end of said main shaft;
• a bearing holder retaining said auxiliary bearing;
• a bearing bracket mounting said bearing holder in any of a slidable manner and a stationary manner;
• an auxiliary bearing assembly positioned at one side of said motor opposite to said compression mechanism;
• and
• a cylindrically-formed body shell retaining and enclosing said compression mechanism, said motor and said auxiliary bearing assembly,
• said method comprising:
• a first step for shrinkage-fitting said stator into said body shell;
• a second step for shrinkage-fitting, and welding thereafter to fix said compression mechanism to said body shell;
• a third step for fixing said bearing bracket integrally to said body shell;
• and
• a fourth step for shifting said bearing holder and said bearing bracket in a radial direction while turning said main shaft with an external force and measuring a turning torque thereof, and for fixing said bearing holder to said bearing bracket at a position where the rotating torque becomes smallest.