Hydraulic System Optimization Analysis Of Large Sugarcane Combines

The study of the large combine harvester is a important step for agriculturalmechanization.Comparing with overseas country, which have complete harvesterkinds system, our country start late and have low research power. In recent years, thecountry use some of the advanced foreign technology to the development of our largecombine harvesters, but due to a lack of understanding of the design principles ofcombine harvesters, our self-developed large-scale harvesters ubiquitous systemefficiency is too low, insufficient energy consumption problem, based on such issues,the writer make one kind of the large sugarcane combine harvester as an example, didthe following process, and aim to find out a practical method of reference andtheoretical basis as well as the optimization suggestions about the system optimization,efficiency analysis. I hope it can give some suggestions about the large sugarcanecombine harvester in our country.First of all introduced the research background of the subject in the paper, andexpounded the present status of agricultural mechanization, and lists the necessity ofmechanical harvesting crops research. Introduced our country and abroad researchstatus, research and development results. Also inductive analysis several classichydraulic subsystems, which used in harvester hydraulic system, and their functions,advantages.After that, the writer make one kind the large sugarcane combine harvester as anexample, analyze its mechanical system and function, hydraulic system and function,aimed existing problem of hydraulic system of the prototype,described the mechanismof the energy loss of the hydraulic system and what reason caused the oil temperaturetoo high, and on the basis of analysis of the rise in temperature of the prototype systempossible factors, provided a theoretical basis for subsequent theoretical calculationsand simulation modeling.Then from the basics of fluid modeling, the fluid statics, fluid dynamics, severalaspects of the pressure loss of the fluid, the steady-state properties of the fluid line, thefluid pressure in the pipeline mutations specifically addressed the basic hydraulicsystem simulation principles and theoretical knowledge involved.According to the theoretical calculation and analysis of the pressure loss in thepiping of the hydraulic system typically impact damage and the effects of temperature discussed etc., but also for the selection of such analysis piping line for the nextsimulation model provides the physical parameters of the hydraulic pipes to the pipeshape, length, diameter, temperature, fluid analysis factor as calculated theoreticalenergy loss.Finally, large-scale sugar cane combine harvester hydraulic system typical unitwithin the pipeline, such as: changes in pipe cross-section of the flow field, pipe bends,bend at the pipeline, such as the confluence of the shunt was simulated, come onstream over the typical velocity vector field model, pressure contours, eddy dissipationmaps, temperature maps and other, more directly reflects the rate of change of the pipeshape and diameter of the fluid inside the pipe, pressure, and temperature of the fluidinside the pipe.Analysis of the size of the result of these changes and the reasons forthe pressure loss, and the simulation results with the theoretical analysis comparing theresults of the second chapter, finding that the simulation results verify the theoreticalanalysis is derived.