| Suppression wheel is one of the key soil touching parts of agricultural machinery,its function is to reasonably compact the soil.Traditional suppress wheel body structure usually choose cast iron,steel and other materials,but this kind of material is relatively smooth surface structure characteristics is inevitable process device main body and the soil particles adhesion problem,affect the device running effect is good and eventually cause the problem of insufficient pressure uneven or town,ultimately affect the quality of work.To overcome the problem of adverse effects,and fully guarantee the good performance of suppression device and ensure good operation effect,it is necessary to suppress wheel to carry out optimization design work,in a reasonable reducing device and at the same time,improve the operation performance of soil adhesion sex,achieve better operation result,eventually improve the comprehensive efficiency of agricultural production level.The following research tasks are completed in this study:(1)Under the scientific guidance of bionics theory,on the basis of the ballast wheel surface structure to change its contact characteristics with soil,realize the outer surface of a convex package structure,the green beetle back convex structure and the convex curve shape of the model,MATLAB by reverse engineering technology,curve fitting.Combined with the use of ultra-high molecular weight polyethylene(UHMWPE)material,3D printing technology is used to form the 3 D convex envelope structure.(2)In Solid Works software to complete the creation of 3 d design model,and combined with ABAQUS software for finite element analysis,the operation process summary ballast wheel,the soil function policy analysis,the process of the surrounding soil structure changes,work resistance characteristics simulation analysis,grasp the objective law to provide scientific basis for the design work.(3)Specifically taking the traditional cylindrical ballast wheel and the bionic convex package ballast wheel as the object,based on the same soil conditions and working environment,the performance advantages of the bionic convex package ballast wheel are evaluated and analyzed,and its positive effect in reducing viscosity and reducing resistance is clear.The paper analyzes the height,inclination,load and spacing,soil adhesion,resistance and soil weight under two different water content.Compared with the traditional design structure of the ballast wheel,the bionic convex package ballast wheel can better overcome the soil adhesion problem in the operation process,and can effectively reduce the soil resistance In the process of increasing soil water content,the above viscosity reduction and resistance reduction effect is more significant.The simulation analysis data show that at the soil moisture content of 20 x 1%,the resistance rate is 1.98% to 35.83%,21.94% to 33.17%;when the water content is 28 x 1%,the resistance rate is 7.65% to 39.39%,and the viscosity rate is 26.71% to 33.36%.According to the ANOVA results,the bionic suppression wheel achieved a relatively better resistance reduction effect compared with the traditional suppression wheel.In addition,the biomimetic suppression wheel can also achieve a relatively significant viscosity reduction effect,especially for the moisture content Compared with the relatively large soil,its viscosity reduction effect is more significant.After the completion of the repression work,the soil capacity can reach the level of about1.0～1.3 g / cm3,which can provide a relatively better soil environment for the growth of crops.Simulation test results show that the new ballast wheel involved in this study can achieve very significant viscosity reduction effect,can effectively reduce the adhesion and resistance caused by the soil,so can significantly improve the operation performance,in improving the ballast wheel design quality,improve agricultural production efficiency has played a positive and effective role. |
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