Supercharged propeller with high hydrodynamic efficiency

The booster-type thruster comprises a guide pipe, a driving system, a first propeller, a second propeller and a rotating shaft, the driving system is installed on the inner wall of the guide pipe, the first propeller and the second propeller are both rotationally installed on the inner wall of the guide pipe, and the length direction of the rotating shaft is the same as the length direction of the guide pipe; the first propeller fixedly sleeves the front end of the rotating shaft, and the second propeller fixedly sleeves the rear end of the rotating shaft; a first cambered surface is arranged on the inner wall of the first propeller, a second cambered surface is arranged on the inner wall of the second propeller, and the first cambered surface and the second cambered surface continuously contract from front to back, so that the overall pressure of the propellers is increased, the rotating speed range of normal use of the propellers is increased, and higher propelling power density is obtained. The inner walls