Solid-liquid two-phase hydraulic design method used for deep-sea mining mine lifting pump

Abstract

The invention relates to a solid-liquid two-phase hydraulic design method used for a deep-sea mining mine lifting pump and belongs to the technical field of deep-sea mining mine lifting pumps. Solid-liquid slurry enters a ring-shaped runner in an outer cylinder from an inlet section in the manner that a driving motor drives a driving main shaft to drive guide vanes in multiple impellers, and thenthe solid-liquid slurry passes through a suction section, and the solid-liquid slurry is discharged from a split section finally under rotating pressurizing of the guide vanes, wherein the impellers and the guide vanes are ring-shaped rotation body structures. By means of the mine lifting pump, clean water runner design calculation is combined, the slurry conveying theory is also met, and design of the runner shape is achieved from the aspects of liquid flow speed and overflowing section area dependency, slurry viscosity precipitation and global viscosity changing. The beneficial effects thatthe structure is compact, flow passing is smooth, wear resistance is high, the solid-liquid conveying efficiency is high, and the service life is long are achieved. The enough runner axial passing capability is ensured, and particles are prevented from blocking a runner. The overflowing speed is increased, axial vortexes are eliminated, it is ensured that downstream through flow has enough kineticenergy, and local vortexes and blockage are effectively prevented.

Description

technical field [0001] The invention relates to the technical field of deep-sea mining lifting pumps, in particular to a solid-liquid two-phase hydraulic design method for deep-sea mining lifting pumps. Background technique [0002] At present, with the rapid development of human civilization and industrialization, land mineral resources are becoming increasingly depleted, and the importance of marine mining has gradually become prominent. As a system engineering, deep-sea mining has the cutting-edge and advanced technology as a whole. Among them, the lifting ore pump for slurry transportation provides power for the entire delivery pipeline, and the solid-liquid slurry is pressurized through the multi-stage circuitous impeller and guide vane flow channel. The existing lifting pump does not perform well in particle passage and efficiency. good. In 1988, Japan's Ebara Company developed two 8-stage submersible pumps, with a flow rate of 450m3 / h, a head of 760m, a power of 1200...

AI Technical Summary

Problems solved by technology

[0005] The invention mainly solves the problems of low solid-liquid transport efficiency, easy blockage, poor wear resistance and short service life in the prior art, and provides a solid-liquid two-phase hydraulic design method for deep-sea mining lifting pumps, which has the advantages of Advantages of compact structure, smooth flow, strong wear resistance, high solid-liquid conveying efficiency and long service life

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