Dynamic Analysis And Experiment Of Typical Operating Conditions For Orchard Subsoiler Chassis

In the deep-tending and tending operations in orchard lands,the topography environment is changeable,and the differences in surface soil physical properties are relatively large,and the crop planting situation is complex.The mechanization of forestry operations is very difficult and has become a bottleneck restricting the economic development of the agricultural in southern China.In order to solve the problem of low efficiency of farming and poor pass through of mechanical equipment in the economic forest in the south of China,It is necessary to research and develop a subsoiler that is dexterous,compact,and equipped with a high-power traction chassis.In order to give full play to the advantages of crawler-type chassis operations in hilly and mountainous regions,it is necessary to design a woodland orchard tracked subsoiler.The size of the resistance during the deep loosening work and the correct design of the various parameters of the crawler chassis will directly affect the operation results of the deep loose tools and the personal safety of the operators.Based on this,this paper mainly analyzes the stress conditions of subsoilers and their chassis.And based on RecurDyn software dynamic simulation test.The main research contents of this article include:(1)First,according to the cutter cutting soil principles,Analyze the effect of the tool force on the running performance of the chassis and the size of the chassis traction required for the deep loose work;Then analyze the impact of chassis key parameters and road surface parameters on the chassis driving characteristics when the crawler chassis is under no-load driving.(2)Inventor and RecurDyn software were used to model the woodland orchard subsoiler chassis,and set the track chassis and ground parameters according to the actual situation,and implemented a virtual simulation of chassis simulation.Study the dynamic parameters of the chassis under different driving speeds,different ground conditions,and different track pretensioning forces.After the calculated deep-resistance values of the subsoiler's chassis were loaded,the chassis was subjected to deep loosening conditions simulation to study the dynamic characteristics of the soil in different soils when the chassis was loosened.(3)Combine the design parameters and simulation results to prototype a tracked subsoiler and perform field performance testing.Analyze whether the dynamic performance of woodland orchard subsoiler chassis satisfies the design requirements in the actual working conditions;verify the correctness of the simulation model by comparing the simulation test;By designing the orthogonal test,obtain the law of the required traction force for the subsoiler tool,and search the optimal deep loose parameter combination.It provides theoretical basis and optimization ideas for the follow-up research of supporting deep foundations.The results show that:In the simulation environment,when the track pretensioning force is 30%of the body mass,the chassis is in 4th gear,and the running surface is a clay road,the chassis driving process is relatively stable,and the driving force of the deep loosening condition satisfies the design requirements.In the woodland test,the maximum traction required for the deep-separation implement is 7.36 kN,and the minimum is 5.87 kN.Through the analysis and calculation of the test rolling resistance value and the total deep resistance value,the calculated results are in good agreement with the simulation results,thus verifying the effectiveness of the simulation model.