| Reed,as a high-quality biomass resource,is being exploited for more and more new uses as the country’s industrial structure adjustment.As a result,the research and promotion of efficient reed harvesting technology must also keep pace.However,the promotion progress and technical support of the existing reed harvesting equipment are still far from meeting the current demand.At present,most of the domestic reed harvesting still adopts the manual centralized harvesting method,not only the operating environment is hard,the labor intensity is big,and the efficiency is low.It is also relatively low.Therefore,in this paper,through the simulation and optimization of the key components of the reed harvester’s cutting table,the efficiency of the harvester’s operation can be improved,thus Addressing the above issues.The main elements of this paper are as follows.1)The average height of reed stalks is 4580 mm,as measured by the material properties of reeds collected from Wuxi High-tech Zone.The average diameter of the culms at 200 mm from the culm root was 15.64 mm and the moisture content was 74.6%.Mechanical properties of the culm test,the test data obtained by the analysis: shear test maximum shear average value of 348.1 N,shear strength average value of 0.91Mpa;compression test maximum pressure average value of 140.8N,compressive strength The average value is 0.66Mpa;the average value of the maximum tensile test is 772.7N,and the average value of the tensile strength is 37.998 Mpa.2)Conduct the theoretical analysis on the main working parts of the cutting platform,and determine the interrelationship and the range of each parameter.motion analysis,solved the set of equations for the installation offset of the paddle wheel,and developed a mathematical model for the forward offset of the paddle wheel;using the Matlab solves the model to obtain the range of reed reel action when reed stalks are fed vertically without "rebound",and The relationship between the forward range of the reel and the wheel speed ratio;the parameter analysis of the cutting device was carried out,and the analysis resulted in: the cutter cutting angle design Meet the clamping conditions;cutter displacement,velocity,acceleration motion law is a sinusoidal function of time;inertia force of the cutter drive mechanism It can reduce the vibration of the frame by local balance.3)Using ADAMS software,the model of the reel and the cutting device is simplified to a certain extent,and the kinematics and dynamics are simulated by adding the constraint at the end;using the wheel speed ratio as the variable,the range of forward movement of the reel and the range of action of the reel are simulated,and the final results are compared with the theoretical analysis for verification;the cutting performance and inertia force balance of the cutting equipment are simulated and analyzed,and the length of the connecting rod in the cutting equipment is optimized.4)In order to test the impact of various factors on the performance of the cutting device,to determine the optimal parameter group,in order to cutting speed,blade length and forward speed.For the test factors,cutting efficiency,cutting power and failure rate are the evaluation indicators for the test bench cutting test,and the response surface method is used.Scenario design,and regression model,the analysis is obtained: cutting efficiency order for advance speed,cutting speed,blade length;cutting The power order is cut speed,advance speed,and blade length;the failure rate order is advance speed,cut speed,and blade length,and Only the interaction between cutting speed and advance speed on cutting efficiency and failure rate was significant,the others were not.Multi-objective parameter optimization yielded the best combination of cutting speed 1.2 m/s,blade length 120 mm,advance speed 0.6m/s,at this time the cutting efficiency of 38.92 plants / s,cutting power 776.37 w,failure rate of 6.24%.Finally,field experiments were conducted to validate the optimal combination of parameters after optimization. |
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