The Birtual Analysis And Optimization Of The Sugar Cane Leaf Shredder’s Key Component

The resources of sugarcane leaves are rich in Chinese tropical regions. To avoid the environmental pollution during burning the sugarcane leaves on the spot, It’s necessary to research the technology of methane fermentation about sugarcane leaves. Mechanical crushing was important in the pretreatment of sugarcane leafs fermentation. At present, prototypes was developed for Sugar cane leaf shredder.Against the questions found in the Sugar cane leaf shredder testing process and combine with the need of the sugarcane leaves anaerobic fermentation,this paper research and analysis about that the main components of Sugar cane leaf shredder. Based on the theoretical stress analysis, the study used CAE and ANSYS Workbench to do the static analysis, dynamics analysis or fluid analysis about the main working parts in order to provide a theoretical basis for the Sugar cane leaf shredder’s structure optimization and performance improving.(1) Established the model for Sugar cane leaf shredder by using Solid Works and conducted the interference checking of the assembly to ensure there is no interference between the components. Conducted a simple motion simulation was conducted about the Sugar cane leaf shredder model, the velocity of the moving blade was got and this provide dates for the subsequent analysis.(2)In order to got stress and strain contours of the moving blade, the statics analysis and finite element simulation about the moving blade were did.The simulation results shows that stress concentration significantly in the bolt hole and the max stress is4.77MPa which occurs on bolt hole; The maximum displacement occurs at the right vertex of the blade, the amount of deformation is0.0152mm. To optimize the size of the blade by using the ANSYS Workbench structural optimization function. The analysis shows that the width of blade has the greatest impact on the quality of the blade and the blade’s stress; the width of the cutting edge has the greatest impact on the overall deformation. The optimized dimensions of the blade after been rounded are as follows:the width of the cutting edge is2.5mm; the width of the blade is45mm; the length of the cutting edge is112mm.(3) Static and dynamic analysis about blade roller was done. The static analysis of the blade roller shows that the deformation of blade roller is relatively large in the x-axis direction and the maximum displacement occurs in top of the blade roller’s blade holder. The dynamic analysis of the blade roller shows the top10bands natural frequencies and critical speed of the blade roller. The study analyzes the harmonic response of the blade roller under114.58N eccentric force and obtains the frequency response curve of the blade roll’s stress, displacement and the acceleration. The blade roll’s stress decreased from0.147MPa to0.0126MPa under the first resonance frequency when the spring longitudinal damping were0.01N*s/m.(4)The flow distribution simulation in sugar cane leaf shredder at different rotating speeds was did by the CFD software FLUENT and the result was experimented. Through the analysis, the basic regularities about the air flow were gained. The study found that velocity distribution is closely related to the inlet and outlet’s angle, with or without the back baffle, the angle size between inlet, outlet and the crushing chamber’s fillet. Installing back baffle and using large radius of the rounded to connect the outlet and crushing chamber can improve the charge and discharge of the grinder.