Fixing structure of radial lead of rotating electrical machine

A fixing structure of a radial lead of a rotating electrical machine, which is furnished with a function of connecting slip rings provided to a rotation shaft of a rotor and axial leads provided inside a center hole of the rotation shaft and supplying a current to a rotor coil and a function of preventing a leakage of a refrigerant gas within the rotation shaft, wherein:

• the radial lead is inserted into a radial lead hole penetrating through the rotation shaft in a radial direction from the center hole, the inner surface of the radial lead hole being free of screw threads, and a male screw formed at one end is threaded into a female screw formed in the axial lead and fixed therein while the other end is electrically connected to the slip ring;
• and
• a sealing member installed to a step portion of the radial lead hole is fastened, via a spacer, by a fastening nut threaded into the other end of the radial lead, so that a side of the center hole is maintained airtight from an outside.