A study of the speed effect of moving sintering trolleys on the productivity of the conveyor machine
DOI:
https://doi.org/10.15587/1729-4061.2017.107349Keywords:
conveyor machine, sintering trolleys, pellets, heat treatment, electric drive, speed regulationAbstract
The article provides results of research on the influence of the movement speed of sintering trolleys of a conveyor belt on the productivity of the conveyor machine. The movement speed of the sintering trolleys has been found to depend on the flow of raw pellets of the assembly conveyor of the conveyor machine; it affects the height of the pellet layer and leads to a change in the productivity of the conveyor machine. The study generates a developed structural scheme for researching the regulation of the movement speed of sintering trolleys.
For the analysis of changes in the flow of raw pellets on the assembly conveyor, which affects the productivity of the CM, a mathematical model of the speed control system of the CM conveyor belt is constructed. For the system model, the force of resistance of the movement of the CM sintering trolleys is calculated with regard to the rolling friction in the running rollers of the sintering trolleys. This parameter is defined in the function of weight: empty trolleys, bottom bedding, raw pellets, and pressure of process gases and air. Another parameter required for the system model is the force of resistance of the sintering trolleys depending on the slip friction in the sealants. This parameter is determined by calculating slip friction in the lower longitudinal seals and when boilers were loaded onto the CM. The model takes into account the driving moment of ease of operation of the electric drive through the unloading part of the CM, the working moment on the driving stars of the conveyor belt, and the power of the electric drive of the belt of the sintering trolleys.
The research findings have determined the ways of changing the speed of the sintering trolleys, the height of the pellet layer, and the productivity of the CM in the function of the productivity of raw pellets on the assembly line.
The results of simulating the synthesized mathematical model of the system of controlling the speed of the CM sintering trolleys in the Matlab/Simulink environment are provided on the basis of the analysis of the freight flow of the assembly conveyor, which changes the productivity of the conveyor machine. It has been determined that efficiency of regulating the movement speed of the sintering trolleys depends on the technical parameters of the electric drive and the conveyor machine. The results of the simulation are given on the recommended limits for stabilizing the height of the pellet layer in the sintering trolleys and the maximum productivity of the conveyor machine.
It has been determined that the practical value of the obtained results lies in the possibility of using the proposed analytical dependencies to develop algorithms for an automatic control system for the heat treatment of pellets in the CM.
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Copyright (c) 2017 Mykhaylo Nazarenko, Nataliia Nazarenko, Vyacheslav Lobov, Liudmyla Yefimenko, Mykhailo Tykhanskyi, Karina Lobova, Rostislav Gayduk
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