Outer recirculation canned motor pump

A shielded pump and external circulation technology, applied to pumps, pump components, non-variable pumps, etc., can solve problems such as harsh working environment, heavy ammonia smell, waste of ammonia water, etc., to improve cooling effect, avoid waste, and improve operations environmental effects

Pending Publication Date: 2017-08-22
ANHUI LIUGUO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the ammonia water pumping devices in existing nitrogen fertilizer plants use external circulation shielded pumps, and the ammonia water constituting the circulating cooling liquid is discharged through the pipeline connected to the cooling liquid discharge port. Heavy smell, poor working environment

Method used

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  • Outer recirculation canned motor pump
  • Outer recirculation canned motor pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Now illustrate structural features of the present invention in conjunction with accompanying drawing:

[0021] like figure 1 As shown, the casing 10 of the canned pump is provided with a liquid inlet 11, a liquid outlet 12, and a cooling liquid discharge port 13, and the cooling liquid discharge port 13 is connected to send the motor cooling liquid in the casing 10 back to the The outer circulation pipeline 14 in the pipeline of the liquid inlet 11, the coolant discharge port 13 is also connected to the motor coolant emergency discharge pipeline 15, and the coolant discharge port 15 is equipped with a coolant discharge port 15 The reversing ball valve 16 communicated with the external circulation pipeline 14 or the emergency discharge pipeline 15. The coolant discharge port 13 is located at the position corresponding to the end of the housing 10 and the motor shaft 21, and the motor coolant flows through the front bearing 24, the motor rotor 23, the motor rotor 23, and...

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PUM

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Abstract

The invention relates to an outer recirculation canned motor pump. A liquid inlet, a liquid outlet and a cooling liquid discharging outlet are formed in a canned motor pump shell. The cooling liquid discharging outlet is connected with an outer recirculation pipeline used for delivering motor cooling liquid in the shell back into a liquid inlet pipeline. In addition, an auxiliary impeller is mounted on a motor rotary shaft in the canned motor pump shell and located at the end of a motor rotor. Discharged motor cooling liquid is redelivered back into the liquid inlet pipeline through the outer recirculation pipeline, the motor cooling liquid is recycled, and environment pollution and wasting of a pumping medium caused by discharging of the motor cooling liquid are avoided. The auxiliary impeller can have a sufficient stirring effect on the passing-by motor cooling liquid, that is, the flowing direction of the motor cooling liquid is changed through turbulent flow holes when the motor cooling liquid passes through blades of the auxiliary impeller; and in addition, the motor cooling liquid is always in the turbulent condition under the rotating effect of the motor rotary shaft, and the cooling and heat exchange effects of the motor cooling liquid on a motor and bearings are greatly improved.

Description

technical field [0001] The invention relates to an outer circulation canned pump. Background technique [0002] The canned pump is to connect the pump and the driving motor together, the rotor of the driving motor and the impeller of the pump are fixed on the same shaft, and the rotor of the motor is separated from the stator by the shielding sleeve. Send medium filled pressure vessel. Part of the medium pumped in the external circulation canned pump constitutes the circulating coolant for the drive motor and bearings and is discharged from the coolant discharge port on the pump body. Most of the ammonia water pumping devices in existing nitrogen fertilizer plants use external circulation shielded pumps, and the ammonia water constituting the circulating cooling liquid is discharged through the pipeline connected to the cooling liquid discharge port. The smell is heavy and the working environment is bad. SUMMARY OF THE INVENTION [0003] In order to solve the above tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/58F04D29/22
CPCF04D29/22F04D29/5806F04D29/588
Inventor 马庆
Owner ANHUI LIUGUO CHEM CO LTD
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