Rotor assembly and electronic water pump

A rotor assembly, comprising an impeller cover, an impeller base and a rotor,

• wherein one end of the impeller base is connected to the impeller cover, an outer wall of another end of the impeller base is provided with a ring-shaped mounting recess, and the rotor is mounted in the mounting recess, and
• the rotor comprises a rotor iron core, a sleeve and at least two end plates, the rotor iron core is sleeved on an outside of the impeller base and located in the mounting recess, the sleeve is sleeved on an outside of the rotor iron core to seal the rotor iron core in the mounting recess, the at least two end plates are located on opposing ends of the rotor iron core, respectively, and the at least two end plates are connected to the sleeve and partly in contact with an inner wall of the sleeve,
• wherein the at least two end plates are separated from each other, each of the at least two end plates comprises a cylinder-shaped portion and a ring-shaped portion, the at least two end plates are each L-shaped, the cylinder-shaped portion is connected to the sleeve and in contact with the inner wall of the sleeve, the ring-shaped portion abuts against and is in contact with an end of the opposing ends of the rotor iron core;
• and
• ends of the sleeve along an axial direction of the impeller base are covered by the impeller base,
• each of the at least two end plates is axially covered by the impeller base, each of the at least two end plates having a surface facing away from the rotor iron core in the axial direction, and each of the surfaces are in contact with the impeller base.