Contra-rotating electric propeller supported by gas drag reduction

The utility model relates to an opposite-rotation type electric propeller supported by gas resistance reduction, which comprises an annular shell and a propelling unit, and the propelling unit comprises a rim type motor, a gas resistance reduction system, a propeller and a shaft system assembly. A front wheel flange type permanent magnet brushless motor and a rear wheel flange type permanent magnet brushless motor which are coaxially arranged are used for driving a propeller respectively to form the combined contra-rotating propeller driven by electricity, the rotating directions are opposite,but the thrust directions are consistent, and the ship is pushed to move forwards together. The propeller arranged on the rear portion absorbs energy of the tail vortex of the front propeller, the overall propelling efficiency is improved, and the effect of contra-rotating the propeller is achieved. The motor is arranged in water and directly drives the propeller to rotate, the transmission linkfrom the motor to the prop