Magnetic levitation centrifugal pump

A magnetic levitation centrifugal pump, comprising a volute, a stator magnetic ring and a rotor;

• the volute is provided with a levitation cavity, a medium inlet and a medium outlet, the rotor is located inside the levitation cavity, and the stator magnetic ring is fixed to the volute;
• the rotor comprises a rotor body and a dynamic magnetic ring positioned on the rotor body;
• the dynamic magnetic ring and the stator magnetic ring are coaxial with each other and are nested, to limit radial positions of the rotor body and the volute;
• a magnet steel assembly is further fixed at the rotor body, the magnet steel assembly comprises N first magnet steels arranged along a circumferential direction, and magnetic poles of all the first magnet steels are arranged alternately;
• two ends of the volute are encapsulated with driving coil assemblies, and
• two driving coil assemblies cooperate with the magnet steel assembly to provide an axial force for the rotor body to move in an axial direction and a rotational force;
• wherein two ends of the rotor body are both provided with the magnet steel assemblies, and the magnet steel assemblies at the two ends of the rotor body are symmetrical with respect to a central cross section of the rotor body;
• the driving coil assemblies located at the two ends of the volute are symmetrical with respect to a central cross section of the levitation cavity;
• one of the magnet steel assemblies and one of the two driving coil assemblies at a same side form a disc-type motor, and disc-type motors at the two ends jointly provide the axial force for the rotor body to move in the axial direction and the rotational force;
• or adjacent first magnet steels are attached, the magnet steel assembly further comprises transverse magnetic conductive magnet steels, the magnetic conductive magnet steels being located between two first magnet steels, and all the magnetic conductive magnet steels and all the first magnet steels form an Halbach magnet steel array,
• wherein the rotor body comprises an annular body and a base body, which are fixedly connected with each other in the axial direction;
• liquid outlets are provided between the annular body and the base body, a central through-hole of the annular body is in communication with the liquid outlets;
• the central through-hole is coaxial with the medium inlet, blades are provided between the annular body and the base body to form a fully-enclosed rotor structure, and the magnet steel assemblies are encapsulated in both the annular body and the base body, and the dynamic magnetic ring is encapsulated inside the base body;
• and
• wherein a first auxiliary channel is formed between an outer peripheral wall and an outer end wall of the annular body and a corresponding inner wall of the volute;
• and a second auxiliary channel is formed between an outer peripheral wall and an outer end wall of the first annular encapsulating cavity and a corresponding inner wall of the volute, and between an inner peripheral wall of the first annular encapsulating cavity and the cover body;
• moreover, an outer end face of the annular body and an outer end face of the base body both have a predetermined included angle with a horizontal plane, and from outside to inside, a distance between the outer end face and the horizontal plane increases.