With the development of science and technology and the improvement of people's awareness of the environment and safety, the requirements for pumps are becoming higher and higher. In some cases, some pumps do not have leakage requirements. This demand has promoted the development of shielded pipeline centrifugal pump technology. Shielded pipeline centrifugal pumps do not have shaft seals and do not leak, so they are becoming more and more common in chemical equipment.
The principle and structural characteristics of the shielded pipeline centrifugal pump: the ordinary centrifugal pump is driven by connecting the impeller shaft of the pump with the electric shaft, so that the impeller and the motor rotate together, and the shielded pipeline centrifugal pump is a non-sealed pump, and the shielded pipeline centrifugal pump and the drive motor are sealed in the pressure vessel equipped with the pumping medium.
The pressure vessel is only statically sealed, and the wires provide a rotating magnetic field and drive the rotor. This structure eliminates the need for traditional centrifugal pump rotary shaft sealing device, so it can be completely leak-free. The shielded pipeline centrifugal pump connects the pump to the motor. The rotor of the motor and the impeller of the shielded pipeline centrifugal pump are fixed on the same shaft. The rotor and stator of the motor are separated by shielding sleeves. The rotor is located in the medium to be transported. Power is transmitted to the rotor through the stator magnetic field. In addition, the manufacture of the shielded pipeline centrifugal pump is not complicated, and its hydraulic end can be designed and manufactured according to the type of construction and relevant standard specifications commonly used in centrifugal pumps.
