Energy-saving magnetic shielding type permanent magnet speed regulator

The energy-saving magnetic shielding type permanent magnet speed regulator comprises a hollow shell, the two opposite side walls of the shell are rotationally connected with an input shaft and an output shaft through bearings in a penetrating mode correspondingly, and the end, located in the shell, of the input shaft is fixedly connected with a permanent magnet rotating cylinder; the end, located in the shell, of the output shaft is fixedly connected with a conductor rotor, an adjusting block is slidably connected between the two opposite inner side walls of the shell, the adjusting block is rotationally connected with a rotating cylinder through a bearing in a penetrating mode, the side wall of the rotating cylinder is fixedly connected with a shielding cylinder, and the inner bottom wall of the shell is fixedly connected with a liquid box. A plurality of electric push rods are fixedly connected to the inner top wall of the shell and the upper surface of the liquid tank, and the output ends of the electric p