Rotating electric machine

摘要

Provided is a rotating electric machine the interior of which can be suitably cooled. A coolant supply means of the rotating electric machine supplies a cooling fluid to the bottom of a tubular member from a location closer to one end of a rotary shaft than the bottom, and the bottom of the tubular member is equipped with through-holes that run in the axial direction of the rotary shaft, with the cooling fluid being supplied to the interior of the tubular member through the through-holes.

主权项

1. A rotary electric machine comprising:
a motor rotor; and a coolant supply unit configured to supply a cooling fluid for cooling the motor rotor, the motor rotor including: a rotational shaft having one end and another end opposite to the one end; a tubular member extending along the rotational shaft, having a bottom wall disposed on the one end side of the rotational shaft and an opening disposed on the another end side of the rotational shaft, the bottom wall being fixed to an outer circumferential surface of the rotational shaft; and a rotor core fixed to an outer circumferential surface of the tubular member, wherein the coolant supply unit has an outlet hole at a point spaced apart from and facing the bottom wall of the tubular member in an axial direction of the rotational shaft, the outlet hole being configured to supply the cooling fluid toward the bottom wall of the tubular member, the bottom wall of the tubular member has a through hole extending along the axial direction of the rotational shaft, and the cooling fluid is supplied through the through hole to inside of the tubular member, a first protrusive wall is annularly formed on the bottom wall of the tubular member and projects toward the one end side of the rotational shaft from a portion positioned radially outward of the through hole, and the outlet hole is disposed radially inward of the first protrusive wall and faces the bottom wall of the tubular member in the axial direction.