A method for replacing single and double-stage impellers in high-speed mining submersible pumps

Abstract

The invention provides a method for realizing single-double stage impeller replacement in a high-speed mine submersible pump. The method adopts the existing high-speed mine submersible pump as the basis and comprises the steps of improving a motor shaft: lengthening the tail end of the motor shaft, and processing to form a first shaft section with a key slot I, a second shaft section with a key slot II and a third shaft section with a threaded hole in the center, of which the shaft diameters are sequentially decreased; realizing a single stage impeller pump: sequentially assembling a guide vane and an impeller at the first shaft section part, assembling an inducer I with a key slot at the second shaft section part, and assembling a screw into the threaded hole of the third shaft section; realizing a double stage impeller pump: sequentially assembling a secondary guide vane and a secondary impeller at the first shaft section part, sequentially assembling a shaft sleeve II, a primary guide vane and a primary impeller at the second shaft section part, and assembling an inducer II with a key slot on the rear part at the third shaft section part. The mutual replacement of the single-double stage impeller structures is realized when the same motor has the same power, and not only are the performance requirements on multiple concrete using conditions of a mine met, but also the economical efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of high-speed mining submersible pumps, in particular to a method for replacing single and double-stage impellers in high-speed mining submersible pumps. Background technique [0002] The high-speed mining submersible pump can reduce the weight and length of the coal mine submersible pump unit. The different usage conditions of the mine require a variety of working performance parameters of the submersible pump, and a special submersible pump is equipped for a specific situation, which reduces the economy and increases the difficulty of transportation. Submersible pumps can meet certain performance requirements through the replacement of hydraulic components, but when the speed increases to the maximum value, there are still cases where the head requirements cannot meet expectations. Switching between numbers is difficult. Generally, submersible pumps can increase the number of pump stages by adding segmen...

AI Technical Summary

Problems solved by technology

Submersible pumps can meet certain performance requirements through the replacement of hydraulic components, but when the speed increases to the maximum value, there are still situations where the head requirements cannot meet expectations. Difficult to switch between numbers

Generally, submersible pumps can increase the number of pump stages by adding segments, but the method of adding shaft segments will affect the reliability of the shaft at high speeds

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