To develop new control algorithms for controlling slurry pumps, it is necessary to have a reliable mathematical model of their operation, convenient for computer simulation implementation. Therefore, the paper discloses a mathematical model of the joint operation of a centrifugal pump with a controlled asynchronous motor drive and a slurry pipeline. The results of transient modes computer simulation, carried out via the xcos application of the scilab software, are presented. This software is a freeware one and, therefore, available free of charge to most researchers. The paper provides an example of verification of the adequacy and performance of the proposed computer model, with the use of characteristics of the centrifugal slurry pump GrAT-225-67-3-2-2. The said model of a centrifugal pump is efficient and can be used during the study of dynamic processes in pipeline transportation systems, as well as in the synthesis of control algorithms for electric drives of pumping units.
One of the important parameters of using the hydraulic transport system in mining enterprises is considered. A method for regulating the ground pump drive and a computer model of the drive power stabilization system are proposed. The simulation was performed in the Scilab program. The performance of the proposed model was checked. The results of simulation with different values of the current and torque are shown. The efficiency of the proposed method for regulating the ground pump drive is evaluated.
The article is devoted to the discussion of the problem of choosing a protective coating for the inner walls of the slurry pipeline of mining enterprises. For the correct choice among the many polymer coatings, it is necessary to test various coatings for water-jet wear. Standardized test methods are not entirely suitable for assessing the durability of coatings in a specific production environment, they do not take into account the nature of the slurry flow, temperature, etc. Solid inclusions of a different particle size and chemical composition are often used in ready-made and published studies, which makes them irrelevant for mining specialists. Often, for a comparative assessment of the wear resistance of various coatings, enterprises conduct their own industrial tests for hydroabrasive wear, in which they recreate the same granulometric composition of the pulp and its concentration. However, they come with a significant investment of time and energy. The article proposes to use a method of accelerated wear testing based on a comparison of the wear of a straight section of a pipeline and a shaped one in the form of a rotary insert at an angle of 90°.
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