Outer rotor structure and magnetic levitation stirrer

Abstract

The application relates to the technical field of magnetic suspension motors, and particularly provides an outer rotor structure and a magnetic suspension stirrer. The outer rotor structure comprises an impeller, a first permanent magnet and a second permanent magnet. The impeller comprises a base and a paddle connected to the base. The base is provided with a containing cavity and an opening in communication with the containing cavity. The first permanent magnet is arranged on the top wall of the base, and the second permanent magnet is arranged on the side wall of the base. The first permanent magnet comprises a plurality of first magnetic steels arranged in the circumferential direction of the base, and the magnetic poles of two adjacent first magnetic steels are opposite. The second permanent magnet comprises a plurality of second magnetic steels arranged in the circumferential direction of the base, and the magnetic poles of two adjacent second magnetic steels are opposite. The diameter of the second permanent magnet is greater than that of the first permanent magnet. In the above scheme, the outer rotor structure produces magnetic interaction force with the stator structure through the first permanent magnet and the second permanent magnet distributed in the axial direction, so that the stability of the outer rotor structure of the magnetic suspension stirrer during stirring operation can be improved.

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