Optimization of Shaft Structure and Materials for Submersible Pump of In-situ Leaching of Uranium
The high rates of submersible pump damage due to pump shaft fracture and pump body cor-rosion have been studied.By conducting theoretical calculations and ANSYS numerical simulations,the mechanical properties such as strength and stiffness of hexagonal and cylindrical shaft structures were compared.Field comparison tests on the corrosion resistance of 304,316L,and 904 stainless steel materials were also carried out.The results indicate that under the same load and equivalent di-ameter conditions,the shear stress on the cross-section of the cylindrical axis is 64.95％of the hexa-gonal axis,and the torsion angle is only 56.25％of the hexagonal axis torsion angle;the simulation results show that the maximum circumferential deformation of the cylindrical shaft coupling is 68.4％of the maximum circumferential deformation of the hexagonal prism shaft,the cylindrical shaft struc-ture exhibits better torsional performance.While 904 stainless steel has the best corrosion resistance,both 304 and 316L stainless steels demonstrate similar corrosion resistance to acidic media.Consider-ing corrosion resistance margins and manufacturing costs,it is recommended to use a cylindrical pump shaft structure and continue using 316L stainless steel as the main material in the development of sub-mersible pumps for uranium mining.
in-situ leaching of uraniumsubmersible pumpshaft structurestainless steelcorrosion resistant
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