Digitai Emulation On Fluid Drive System Of Sugarcane Mill & Plc Integrated Control On The Productive Line For Grinding Cane In Sugar-refinery

DIGITAI EMULATION ON FLUID DRIVE SYSTEM OFSUGARCANE MILL & PLC INTEGRATED CONTROLON THE PRODUCTIVE LINE FOR GRINDING CANEIN SUGAR-REFINERYABSTRACTThe fluid drive system of Sugarcane Mill is adopted on the productive line in the sugar-refinery in broad and few used at home. Needless to say, the study is done about it. Contrasting with the mechanical drive system, its predominance is in evidence. The thesis centered on the topic. A fluid drive program of the Sugarcane Mill is made. It is a must to have the digital simulation study on the hydraulic system. At the same time, a good program of PLC integrated control instead of Relay control system that owns much limitation is drew up on the productive line for grinding cane and extracting sugar juice in sugar-refinery.A volume speed controlling system is selected on the fluid drive system of Sugarcane Mill, which consists of cam type axial piston variable pump and ram marathon fixed motor. An individual hydraulic system is adopted by the up-axis of the Mill. The forward axis and the back axis use a uniformity fluid system. Except the motors and the pipelines of the two system, the others parts are consisted of a single mobile power station. This is a one advantage of fluid drive system comparing to mechanical drive system. The components are elected in China only in addition to the motors. The hagglund motors in Sweden are chosen in the two systems. A careful analyst is done for the coupling of the motors and axes of the Mill. A best coupling style that the motors fix at the end of the axes is adopted in this thesis. The whole systems have simple structure, high cost performance and high automation degree.A reasonable choice among the factors affecting on the fluid drive system aremade, established the static and dynamic mathematical models system by mean of the power bond graphs. On the basis of modifying the original digital simulation program, the digital simulation study is made. The up-axis hydraulic system is chosen as a typical to analyze the whole systems performance. The result shows that the design system has good static characters and dynamic characters. The factors of the hydraulic system, such as the line size, the backed pressure, the inertia of the rotary parts and the load magnitude has different effect on the system's behaviors. The line diameter, the backed pressure and the load magnitude are important to affect on the system.With the system structure simplification to different degree, the capability of which is different. This discuss here affirm that the study model in the thesis is an optimizing one.According with the specialty of the grinding productive line, the advanced agility and credible PLC integrated control system is designed to in place of Relay control system that owns bad reliability and bad alterability. The environment is improved. It also meets the tidal current of material transportation controlling, tally with the up trend of the science and technology in the sugar-refinery.A reasonable program and a theoretical model are provided for the practical design and debug of the fluid drive system of Sugarcane Mill so as to shorten its design period, and a reference for study of others hydraulic system of the equipment in the sugar-refinery. It also affords a viable manner for integrated control on the grinding or other technologic productive line.