Submersible axial-flow pump with inbuilt impeller

Abstract

The invention relates to a submersible axial-flow pump with an inbuilt impeller. The submersible axial-flow pump comprises a water suction chamber, an impeller hub and a water discharge chamber that are all coaxially communicated, and further comprises a motor rotor and a motor stator, wherein the motor rotor is fixedly arranged on the outer periphery of an impeller shell, one ends of more than three blades are uniformly connected onto the inner periphery of the impeller shell, the other ends of the blades are respectively connected with the impeller hub so as to form an impeller, the impeller is positioned in the middle of the motor rotor so as to enable the motor rotor and the impeller to be integrated into a whole; the motor stator is arranged outside the motor rotor in a sleeving manner, so that a water filling type submersible motor is formed. According to the invention, the axial length of the submersible axial-flow pump is greatly shortened, so that the structure is compact; the requirement for strength and rigidity of a rotating shaft is lowered; the submersible motor is positioned outside a flow passage, so that the pumped water flow of the submersible electric pump is not affected, the efficiency of the submersible electric pump is improved, and the safety and reliability of the motor are improved. The bearing chamber is sealed by adopting a cartridge mechanical seal, so that the mounting precision requirement is lowered and the floatability is good.

Description

technical field [0001] The invention belongs to the technical field of submersible electric pumps, in particular to submersible axial (mixed) flow pumps. Background technique [0002] Usually, the structure of the submersible shaft (mixed) flow pump is that the dry submersible motor is coaxially connected with the submersible pump, the dry submersible motor is placed in the outlet flow channel of the submersible shaft (mixed) flow pump, and the impeller of the pump is on the water inlet side of the unit. . The impeller of the pump pumps the water flow through the outer wall of the motor and flows into the water outlet channel. Equipped with a dry submersible motor, it is a fully sealed structure, and the inner cavity is dry air. The deficiencies of the submersible axial (mixed) flow pump of this type of structure: First, the submersible motor is submerged in water for a long time, and the sealing of the motor is difficult to guarantee, especially when the submersible motor...

AI Technical Summary

Problems solved by technology

The deficiencies of the submersible axial (mixed) flow pump of this type of structure: First, the submersible motor is submerged in water for a long time, and the sealing of the motor is difficult to guarantee, especially when the submersible motor is immersed in deep water, the electrical insulation of the motor cannot be guaranteed. Reliable guarantee, dry submersible motors have potential safety hazards

This structure requires high processing precision and poor anti-vibration performance

The im

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