The Design And Key Component Simulation Analysis Of Picking And Crushing Device For Forest Residues

In today’s economic development,energy consumption presents a rapid growth trend,and the energy crisis has restricted the development of China’s economy.It is very important that how to fully utilize surplus resources into renewable energy in China.And there are a lot of forest harvesting and branches leaves and other residues every year.If these residues were used effectively and reasonably,it can not only reduce the impact of the energy crisis to a certain extent,but also effectively prevent the occurrence of forest fires.How to use these forest residues requires further research on collection agencies and crushing agencies.In view of the problems such as poor pickup effect,large power consumption of the collection agencies and incomplete crushing of the crushing agencies,the new machine which is combining with the existing market mechanism is designed to collect and crush for the forest residue.This paper focuses on the theoretical analysis and statics analysis of the collection agencies and the crushing agencies,and optimizes the existing key parts.After that,the optimized collection agencies and the crushing agencies are simulated,and the optimized collection agencies and crushing agencies have the better effect.First,relevant theoretical analysis is carried out.According to the collection agencies in the collection process during the movement,the establishment of its operating science and dynamics model to determine the movement of collection any end of the law.In the crushing agencies,the side entrance cutter of the crushing agencies is subjected to the slip-shear theory analysis,and the impact and comminution principle of the flail knife in the crushing agencies are analyzed.All theoretical analysis provides the basis for the subsequent three-dimensional modeling and statics analysis.Then,creating the three-dimensional modeling and key components static analysis and optimization.Three dimensional modeling and assembly of the key components in the collection agencies and the crushing agencies are carried out by Solidworks.In order to understand the stress and movement of the key components,the three-dimensional model of the spindle of the collection agencies and the flail knife of the crushing agencies are imported into the ANSYS.The static analysis of the spindle and the flail knife is analyzed to observe the magnitude of the equivalent stress and deformation.The six-order modal analysis of the pickup device is carried out to avoid unnecessary frequency.The flail knife of the crushing agencies are optimized:Through the common language recognized by ANSYS and Solidworks,the structural parameters of the flail knife are defined as design variables,and the optimal safety factor and mass of the flail knife are optimized for the multi-objective drive.Optimized flail knife structure parameters are obtained,the hole diameter is reducedd to 10.862 mm,the thickness is increased to 11.032 mm,the optimized three-dimensional model is kept unchanged,and the optimized three-dimensional model satisfies the optimal working conditions.Finally,the software is used for simulation test.lt is verify by ADAMS that that pickup device can complete the pick-up task.The EDEM discrete element analysis software is used to create the bond-broken model of the forest residue,and the EDEM is introduced into orthogonal simulation test.By observing the number of fracture of the model bonding bond,it is found that the flail knife after the optimization has stronger crushing effect.