Study On The Design Of Peanut Kernel Crusher Based On Topology Optimization

Peanut is one of the main sources of edible vegetable oil and vegetable protein.As far as the process of peanut oil pressing is concerned,it has been confirmed that peanut oil needs to be broken before processing,and the broken oil needs to be softened before rolling the billet.The quality of the rolled billet is good,the oil yield is high,and the oil quality is good.Peanut kernel crusher,as the main pretreatment equipment in the process of oil extraction,has been widely used.Peanut kernel,under the action of friction on the surface of the roller,enters between the rollers for crushing.The main advantages of the peanut kernel crusher are:simple structure,compact body,convenient adjustment of crushing particle size,less powder phenomenon when crushing,etc.However,the roller structure of peanut kernel crusher is still designed based on experience,which is lack of science to a certain extent.The structure design is unreasonable,the weight is heavy,the material cost and energy consumption are high,which ultimately leads to the low efficiency of peanut crushing.Therefore,it is necessary to redesign and optimize the key components of peanut kernel crusher to solve the above problems.The mechanical properties of three peanut kernels,Luhua,Se rich black and four red kernels,were analyzed by static pressure crushing test.The maximum crushing force of Luhua peanut kernels under positive pressure was selected as the design basis,and the whole machine of peanut kernels crusher was designed.The finite element models of roller and roller shaft are constructed and analyzed respectively.Through the modal analysis of the roller,the natural frequencies of the first six stages and the vibration patterns of each stage are obtained.The modal results show that the working frequency of the roller can avoid the natural frequency and no resonance occurs.The vibration mode of the roller is mainly bending and twisting,which mainly affects the stability of the roller in the work.In this paper,the two-way progressive structure optimization method is used to optimize the topology of the key components of peanut kernel crusher.This method is easy to program.Based on ABAQUS platform,using ABAQUS script interface and python script program to establish a connection,the two-way progressive structure optimization algorithm based on flexibility minimization is debugged,the implementation process of the two-way progressive structure topology optimization method is given,the mathematical model of flexibility minimization under volume constraints is established,and the unit sensitivity of the algorithm is calculated and filtered Methods,unit renewal process and convergence criteria are described in detail.The topology optimization of roller and frame structure of peanut kernel crusher is carried out by two-way progressive structure optimization algorithm.The purpose of reducing weight and material and optimizing structure is completed.The results of topology optimization are redesigned and the new structure is analyzed by finite element method.By comparing the new structure with the original one,the mass and volume of the new roller are reduced by 29.24%,and the weight reduction task is realized.According to the material distribution form of the frame structure,the structure of the frame is improved to achieve the purpose of structural optimization.