Mixed flow submersible motor pump with built-in impeller

Abstract

The invention discloses a mixed flow submersible motor pump with a built-in impeller. The mixed flow submersible motor pump comprises a water suction chamber, the mixed flow type impeller and a guidevane body, the mixed flow type impeller is welded and fixed to a rotor fixing support, a motor rotor is positioned and assembled on an outer ring of the rotor fixing support through an inner ring, then the motor rotor and the rotor fixing support are connected through a pressing plate by means of a fastening piece, and therefore the motor rotor, the rotor fixing support and the mixed flow type impeller form an integrated rotor; and one ends of mixed flow type blades are evenly connected to the inner circumference of the rotor fixing support, the other ends of the mixed flow type blades are connected with an impeller hub to form the mixed flow type impeller, the mixed flow type impeller is located at the portion of an inner cavity of the motor rotor, and therefore the motor rotor, the rotorfixing support and the mixed flow type impeller form a whole. According to the mixed flow submersible motor pump, the motor rotor, the rotor fixing support and the mixed flow type impeller form the integrated rotor, and therefore the submersible motor pump is more compact in structure, the axial length is greatly shortened, and the unit size and weight are greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of submersible electric pumps, in particular to a mixed-flow submersible electric pump with built-in impellers. Background technique [0002] Usually, the structure of the submersible mixed-flow pump is that the dry-type submersible motor is coaxially connected with the submersible pump, the dry-type submersible motor is placed in the outlet flow channel of the submersible mixed-flow pump, and the pump impeller is on the water inlet side of the unit. The impeller of the water pump pumps the water flow, and flows into the water outlet channel through the outer wall of the motor. Equipped with a dry submersible motor, it is a fully sealed structure, and the inner cavity is dry air. The disadvantages of the submersible mixed-flow pump with this structure: First, the submersible motor is submerged in water for a long time, and the sealing of the motor is not easy to ensure, especially when the submersible motor...

AI Technical Summary

Problems solved by technology

The disadvantages of the submersible mixed-flow pump with this structure: First, the submersible motor is submerged in water for a long time, and the sealing of the motor is not easy to ensure, especially when the submersible motor is immersed in deep water, the electrical insulation of the submersible motor cannot be reliably guaranteed. Dry submersible motors have potential safety hazards

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

The impeller is easy to form uneven gaps on each side, resulting in rubbing accidents between the rotating impeller and the fixed impeller shell

In addition, the dry submersible motor is placed in the outlet flow channel, which will affect the outlet flow state of the pumped water flow and directly affect the efficiency of the submersible mixed flow pump.

The original submersible mixed flow pump has a complex structure and a long axial length, making it difficult to maintain and disassemble

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