Energy-saving horizontal multi-stage centrifugal pump

Abstract

The invention relates to a centrifugal pump, in particular to an energy-saving horizontal multistage centrifugal pump. According to the technical proposal provided by the invention, a pedestal is provided with a water outlet section shell and a water inlet section shell at intervals, a middle section shell is arranged between the water outlet section shell and the water inlet section shell, pump shafts are horizontally and rotatablely mounted on the water outlet section shell and the water inlet section shell, a pump shaft in a pump cavity is provided with an impeller and a guide blade, the a pump tail sealing device is arranged between the water inlet section shell and the pump shafts, backwater pipelines are arranged on the water outlet section shell and the water inlet section shell, a discal pump end sealing body is fixed on the water outlet section shell, a pump end balancing body is arranged between the pump end sealing body and the water outlet section shell, a dynamic balancing disc is fixed on the pump shaft between a static balancing disc and the impeller abutting on the water outlet end, the side wall of the dynamic balancing disc facing to the static balancing disc is provided with an annular mounting groove around the pump shaft, and a wearing ring is embedded in the annular mounting groove. The centrifugal pump has good axial force of a balance pump and can eliminate a great deal of reflux loss of high-pressure water, thus the efficiency of the pump is greatly improved.

Description

technical field [0001] The invention relates to a centrifugal pump, in particular to an energy-saving horizontal multistage centrifugal pump. Background technique [0002] The horizontal multistage centrifugal pump has not changed since the invention of the world, so it is called "traditional horizontal multistage centrifugal pump", see figure 1 , it mainly consists of pump end bearing (cylindrical roller bearing) 1', pump shaft 2', pump end bearing bracket 3', pump end packing seal 4', water outlet section 5', balance disc 6', final guide vane 7', guide vane 8', impeller 9', middle section 10', tension bolt 11', water inlet section 12', pump tail packing seal (asbestos packing) 13', pump tail bearing bracket 14', pump tail Shaft sleeve 15', pump tail bearing (cylindrical roller bearing) 16', pump coupling 17', base 18', return water pipeline 19' and pump end shaft sleeve 20', etc. [0003] The biggest disadvantage of the traditional horizontal multistage centrifugal pump ...

AI Technical Summary

Problems solved by technology

[0003] The biggest disadvantage of the traditional horizontal multistage centrifugal pump is that it uses the balance disc 6' to balance the axial force of the pump. It relies on the balance disc 6' to drive the pump shaft to move back and forth to balance the axial force of the pump.

At the same time, 10% to 15% of the high-pressure water in the pump body is lost from the gap of the balance plate, which causes serious problems of high energy consumption in traditional horizontal multistage centrifugal pumps. It cannot be seen outside the body, but it actually exists, and the world's pump theory workers have been studying ways to eliminate this high energy consumption problem, but they have not been able to solve it so far

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