Canned motor pump, also known as packingless pump or hermetically sealed pump, is a type of static seal pump. It adopts an integrated "water pump + motor" structural design, where the pump and the driving motor are connected together and enclosed in a pressure shell filled with the pumped medium. The rotor of the motor and the impeller of the pump are fixed on the same shaft, and a canister is used to separate the rotor and stator of the motor. The rotor operates in the conveyed medium, and its power is transmitted from the stator magnetic field to the rotor.