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Electro-hydraulic proportional control is a fluid transmission and control technology is a branch of development potential in the industrial areas has been widely used. However, the application of the current case, the technology is not mature enough, for example, design theory is not perfect, proportional valve not wait to build closed-loop system. In the lead electrolytic refining process, how the use of effective control, the cathode pumping rod production line to ensure fast, stable and effective completion of the conductive rod extraction, electrolytic production of lead needed to solve technical problems. Therefore, electrical lead rod pumping unit targeting electro-hydraulic proportional loop control studies with good theoretical and practical value of the works. After reviewing a large number of domestic and international data, based on the thesis summarizes the electro-hydraulic proportional control technology and electrical lead rod pumping machine status and development trend of research, analyzes their advantages and disadvantages, this study presents the content and direction. Analysis of lead electrolysis rod withdrawal requirements, determine its process. Carried out the mechanical pumping rod design. Using the new method and apparatus for pumping rod, which can effectively solve the problem of the reliability of pumping rods. Currently used for the electro-hydraulic proportional speed control system there is no pressure compensation error problems, theoretical analysis, a new pressure compensation. Through computational analysis, a reasonable selection of system components, design and improved electrical lead rod pumping unit electro-hydraulic proportional speed control system. Were established proportional amplifier, proportional solenoid, electro-hydraulic proportional valve, the displacement sensor mathematical model, on this basis, according to the actual parameters of the system established electro-hydraulic proportional valve cylinder power institutions and electro-hydraulic proportional speed control system The mathematical model and theoretically open-loop, closed-loop system for the dynamic and static and stability analysis, the conclusion of the system unstable. Application of computer engineering software MATLAB / Simulink toolbox for system simulation analysis, and theoretical analysis to the same conclusion. Valve cylinder speed control system for the precarious situation, using PID control method for calibrating the system, select a suitable PID parameters. Before and after correction of static and dynamic characteristics of a comparative analysis of the simulation. Through the PID correction, to ensure the control accuracy of the premise, the system reaches the stability requirements to meet the production requirements of the system. Finally, through the hydraulic system and equipment CAT test trial production run of the system data obtained experimentally. Through analysis of experimental data, the system meets the design requirements, to meet production targets.
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