Authors: A.A. Korzhev, M.V. Tolstikova, A.M. Vatlina

Title of the article: Simulation of dynamic processes in the electric drive system of the pulp pump with variable concentration of the pumped liquid

Year: 2023, Issue: 2, Pages: 12-19

Branch of knowledge: 09.05.03 Electrotechnical complexes and systems

Index UDK: 622-331

DOI: 10.26730/1816-4528-2023-2-12-19

Abstract: The task was set to create a mathematical model of dynamic processes in hydrotransport systems, taking into account the influence of the concentration and density of solid matter in the pulp on the operation mode of the electric drive, as well as the possibility of controlling the speed of rotation of pumping units. Based on the analysis of known works, the conclusion was made about the relevance of this problem. The mathematical model of the system dynamics was developed, including: a pump unit with an adjustable electric drive based on an asynchronous electric motor and a frequency converter, a centrifugal pump and a pipeline through which the slurry moves with varying values of the concentration and density of the solid. On the basis of the mathematical model, a simulation model was built in the OpenModelica system, graphs of the dependences of the engine speed, torque on the engine shaft, pressure in the pipeline, volumetric flow rate of the transported slurry, power on the engine shaft on variable values of the concentration of solid matter in the composition of the pulp were plotted. Based on the results obtained, conclusions were drawn about the performance of the model, the adequacy of the model, as well as the feasibility of regulating the speed of rotation of the pump, depending on the concentration of solids in the pulp. It is assumed that this model will be useful in choosing a soil pump and the mode of operation of its electric drive for enterprises involved in extraction, enrichment and transportation of ores, as well as the transportation of enrichment tailings to a tailing dump or stowing complex. Also, the model can be useful for analyzing the operation of existing hydraulic transport systems, when creating hydraulic transport control systems.

Key words: transport pulp ground pump electric drive concentration solid phase energy efficiency modeling

Receiving date: 18.12.2022

Approval date: 15.04.2023

Publication date: 17.05.2023

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