Permanent magnet electric roller stator circulating cooling device

A permanent magnet electric roller stator circulating cooling device disclosed by the invention comprises a shell, an oil plug mechanism and an end cover mechanism, wherein a first clamping strip is fixed on the outer surface of the shell through a first fixing bolt, a grid and a rotor are fixed on the inner wall of the shell, the oil plug mechanism is connected to the right side of the shell in a penetrating and threaded manner, the end cover mechanism is fixed to the left side and the right side of the shell in a penetrating mode and located on the outer side of the first limiting ring, the stator is located on the inner side of the rotor, the left side and the right side of the stator penetrate through the end cover mechanism to be connected with clamping rods, and the clamping rods are connected to the inner end face of a connecting shaft in a clamped mode and fixed to the connecting shaft through studs. According to the permanent magnet electric roller stator circulating cooling device, after the device