Submersible motor

Abstract

The invention discloses a submersible motor. According to the technical scheme, the submersible motor is characterized by comprising a rotating shaft, a rotor, a stator, and a shell assembly equippedwith an inner cavity and an outer cavity; the rotating shaft is located in the inner cavity, and one end of the rotating shaft penetrates out of the shell assembly; one end, penetrating out of the shell assembly, of the rotating shaft is in interference fit with a sand prevention cap; a support table vertically extends out of the shell assembly, and the sand prevention cap is buckled on the support table; a sealing part is arranged between the rotating shaft and the support table; the shell assembly is provided with a water supplementing hole for communicating the inner cavity with the outside, and a flow limiting assembly for balancing the internal pressure and the external pressure of the submersible motor is arranged in the water supplementing hole; and a filter part is arranged on oneside of the flow limiting assembly. According to the submersible motor, the gravel can be blocked outside the motor, the inner pressure and the outer pressure of the motor can be kept consistent, andthe usability and reliability of the whole motor are improved.

Description

technical field [0001] The invention relates to a submersible motor. Background technique [0002] Submersible electric pumps are widely used in various fields of industrial and agricultural production and daily life. Submersible electric motors are an important part of submersible electric pumps. They are mainly divided into dry type (the motor is completely sealed), semi-dry type (the stator of the motor is sealed, and the rotor is in the running in water), oil-filled (the motor is filled with oil to prevent moisture from invading the windings) and wet (the motor is filled with water, and both the stator and the rotor run in water). [0003] When the submersible electric pump transports liquid containing impurities such as gravel, it is necessary to protect the shaft end of the submersible motor to prevent impurities such as gravel in the liquid from entering the submersible motor, causing wear to the parts in the motor and reducing the service life. [0004] The current ...

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Problems solved by technology

[0003] When the submersible electric pump transports liquid containing impurities such as gravel, it is necessary to protect the shaft end of the submersible motor to prevent impurities such as gravel in the liquid from entering the submersible motor, causing wear to the parts in the motor and reducing the service life

[0004] The current submersible motors mostly use sand throwing rings to prevent impurities such as gravel in the liquid from entering the motor. During the operation of the motor, due to the centrifugal effect of the sand throwing ring and the "positive pressure effect" in the cavity generated by the heat generated by the motor, this Gravel will not enter the inner cavity of the motor, but when the motor stops running, the gradual cooling of the motor cavity will form a "negative pressure effect". The service life of the motor is affected

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