An external rotor submersible tubular pump

Abstract

The invention discloses an outer-rotor submersible tubular pump which comprises a guide vane body, an impeller housing, an outer rotor, a water filling type submersible motor stator and a water sucking chamber. The outer rotor is of an integrated structure and comprises a water filling type submersible motor rotor, a hub body and an impeller. An impeller is welded and fixed to the water filling type submersible motor rotor, and the water filling type submersible motor rotor is rigidly connected with the hub body to form a whole. The water filling type submersible motor stator is built in the inner cavity of the outer rotor. The whole structure of the pump has the advantages of being short in axial distance, compact in structure, light in weight, safe, reliable and the like, the water filling type submersible motor stator is creatively built in the inner cavity of the motor rotor, meanwhile the phenomenon that rotation of an integrated rotor of a submersible electric pump with a built-in impeller in water causes larger frictional loss is avoided, and the water pumping efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of submersible electric pumps, in particular to an outer rotor submersible tubular pump. Background technique [0002] There are two structural types of submersible pumps, one is a submersible pump with a traditional dry submersible motor, and the other is a submersible pump with a built-in impeller. [0003] The dry submersible motor and the pump body in the submersible tubular pump used in the traditional dry submersible motor are relatively independent. The motor is placed in the water outlet channel of the submersible electric 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. This type of submersible pump has the following disadvantages: First, the subme...

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Problems solved by technology

[0020] In order to solve the problem of the safety and reliability of the traditional submersible tubular pump and the large friction loss caused by the integrated rotor of the impeller-built-in submersible tubular pump rotating in water, the invention adopts an innovative design to set the stator of the water-filled submersible motor inside the motor rotor cavity, and the rotor of the water-filled submersible motor is designed as the hub part of the fixed blade, so that the structure of the water pump runner is consistent with that of the ordinary tubular pump runner, and the integrated rotor of the submersible tubular pump with built-in impeller is prevented from rotating in the water, resulting in relatively large For the defect of large friction loss, innovatively provide a simple and reliable water-filled submersible motor outer rotor submersible tubular pump

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