34results about How to "Less sealing points" patented technology

The underwater propeller comprises an outer cylinder, two or more propelling units are coaxially arranged in the outer cylinder in series in the water flow direction, each propelling unit comprises a cylindrical stator located on the outer ring, a cylindrical rotor is rotationally assembled in the stator through bearings arranged at the two ends, and impeller blades are arranged on the inner wall of the rotor; the outer side of each impeller blade is fixed to the inner wall of the rotor, a permanent magnet is attached to the outer wall of the rotor, coils are distributed on the inner wall of the stator and are coreless coils, and the number of turns of the coils of each propelling unit is sequentially reduced from the water inlet end to the water outlet end. The coil is a coreless coil, the coreless coil eliminates iron loss, and under the condition of the same thrust, the needed current is smaller, more electricity is saved, and the efficiency is higher.

The application provides a composite cooling shell and belongs to the technical field of new energy automobile electric motors. The composite cooling shell comprises a reducer first shell, a motor shell arranged on one side of the reducer first shell, an integrated structure of a motor rear end cover and a motor shell, a motor inner shell sleeved on the inner cavity wall of the motor shell, a first cooling medium flow channel comprising a first medium first flow channel arranged in the motor shell and a first medium second flow channel arranged in the motor inner shell, and a second cooling medium flow channel arranged between the motor shell and the motor inner shell and used for taking away the heat of the motor shell and the motor inner shell. The composite cooling electric motor can solve the technical problems of poor cooling effect, low integration, poor compactness and poor universality in extreme working conditions in the prior art.