Structure Design And Simulation Analysis Based On AMESim For Mulberry Shoots Trimmer

Developing and improving the mechanization level of sericultural production is an important part of sericulture technique system construction, it has very important significance to promoting appropriate scale management of sericultural production and enhancing sericultural competitiveness. At present, the area of mulberry field in our country has reached709,000hm2, approximately20,000,000sericulturists across the country, about100,000tons yearly of silk production capacity. Mulberry pruning is the key part of sericultural production. Manual pruning, whose disadvantages lie in great labour intensity, asymmetrical pruning, low efficiency and semi-mechanized pruning,whose disadvantages lie in difficult movement, low efficiency, high cost are widely used in the nation.The hydraulic type mulberry pruning mechanism is designed according to the agronomic requirement of mulberry pruning and combined with average row spacing, average plant spacing and harvest characteristics. On the basis of the diameters of mulberry shoots, the diameter of circular saw is selected by255mm, the number of teeth is80, and value of the thickness of saw is1.6mm. The selective model number of the hydraulic motor is XBSC-F40, which working speed is2500r/min and maximum speed is2500r/min. Three piston rods of the hydraulic cylinders in length are taken as0.2m,0.2m,0.4m. The distance between A side and another side B for the fork is confirmed by1≤255mm. The axial piston pump is selected to apply in this system for the hydraulic pump, which detailed parameters are as following:model number as XB-E9.5, working and maximum speed as3000r/min,4000r/min respectively.The throttle circuit、the buffer circuit and all kinds of hydraulic components is selected in the light of the principle and operation of the hydraulic trimmer, which are connected with pipes as the hydraulic system of it. The schematic circuit of this hydraulic system is drawn by using the Microsoft Visio and some hydraulic components are also calculated. The results are calculated as following:the maximum flow of the fork cylinder between14.21L/min and24.23L/min, the maximum flow of the feed cylinder between12.35L/min and22.32L/min, the maximum flow of the supporting cylinder between14.46L/min and18.56L/min. The theorical flow, the actual flow and the output torque of the motor are50L/min,60L/min, and34Nm. The length、width and height of the tank are300mm respectively.The feasibility of the hydraulic system for the shoots trimmer is verified. The simulation model of this hydraulic system is constructed by using AMESim, for which the appropriate mathematical models and parameters are selected in the case of combining with the actual operation of the trimmer and the structural features. Afterwards, the AMESim run. The results of simulation is the maximum values of displacement and velocity as0.176m and0.019m/s, the pressure value and flow value of the right chamber for supporting cylinder as80bar and0.9L/min; the maximum value of output torque and speed as15Nm and30rev/min etc. Compared with the simulation results, these values are within a reasonable range, but the process of analysis is consistent with the fact. The hydraulic system designed for the trimmer is feasible.In short, the three-dimensional model and the simulation models of the hydraulic system for the shoots trimmer are based on the Pro/E and AMESim, which provide important protection to further research for the future. In addition, the models of the hydraulic components have reusability and versatility in the hydraulic system. Finally, three methods of the hydraulic system design and simulation method of the hydraulic system are cited in the paper, which have important reference for the same study.