Shield type liquid pump

Abstract

The invention belongs to the liquid cooling pump design technology field, and relates to a shielding liquid pump. A shielding liquid pump comprises a pump body and a motor. A liquid inlet hole is arranged in a port of the motor, and a cooling liquid enters into the motor through the liquid inlet hole and then flows out of a motor shaft. A stator armature (5) of the motor is a vacuum encapsulationstructure, and a sheath (3) wraps an outer surface of the stator armature (5). The invention provides a design solution for a centrifugal pump to convey corrosive and conductive media. In the invention, a traditional mode of sealing the motor by adopting a mechanical seal and other shaft seal structures is changed; and a motor stator is subjected to vacuum encapsulation by using a non-metal material, a compact protective layer is formed on a surface, and a metal sheath structure made of a high-stability material is designed outside the protective layer so that states that a cooling liquid circulates in the motor and the motor stator is completely isolated from the cooling liquid are achieved.

Description

Technical field [0001] The invention belongs to the technical field of liquid-cooled centrifugal pump design, and relates to shielding structure design, in particular to a high-reliability liquid-cooled canned pump structure used in a No. 65 coolant environment. Background technique [0002] Traditional centrifugal pumps with No. 65 coolant as the working medium often use mechanical seals and other shaft seal structures to seal the motor to prevent the coolant from entering the motor and causing damage to the motor, but the problem of shaft seal leakage seriously restricts the improvement of pump reliability; In the later improved product, the motor stator is potted with non-metallic materials to allow the coolant to enter the motor and the shaft seal is eliminated. However, with long-term work, the potting material ages and the sealing is attenuated, and there is a risk of potting failure. Summary of the invention [0003] The purpose of the present invention is to propose a high...

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Problems solved by technology

[0002] Traditional centrifugal pumps using No. 65 coolant as the working medium usually use shaft seal structures such as mechanical seals to seal the motor to prevent the coolant from entering the motor and causing damage to the motor, but the leakage of the shaft seal seriously restricts the improvement of pump reliability; The later improved products potted the stator of the motor with non-metallic materials to allow the coolant to enter the interior of the motor and cancel the shaft seal. However, with long-term work, the potting material will age and the sealing will attenuate, and there is a risk of potting failure.

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