Research On Optimization Of The Performances Of Spin Cutting Assembly Of The Paddy Field Embankment Machine

Paddy field bundling machine is a kind of mechanical equipment for paddy field preparation instead of manual bundling.As an important part of the ridge building machine,the rotary cutting soil gathering device has a great influence on the working efficiency and quality of the ridge building machine.In this paper,we build machine on both sides of paddy field soil type rotary cutting device study set soil,build piece machine to meet the paddy field soil set soil performance requirements,improve the working efficiency of the rotary cutting device,combined with the smooth particle hydrodynamic research method(SPH)and the discrete element method(DEM)for structural parameters of the rotary cutting set soil machetes and permutation and combination of rotary cutting set soil properties are analyzed,the influence of the final soil box experiment platform is constructed to machetes structure rotary cutting soil effect is verified.The specific research work is as follows:1.A paddy field soil in Wuhan area was selected as the research object for testing,and parameters such as moisture content,density,cohesion and internal friction Angle of the soil were measured,laying a foundation for establishing the dynamic model of the coupling action between the scimitar and the combined tool shaft and the soil.2.Based on the earth machetes SPH method--soil coupling dynamics model,through numerical calculation,analysis of the single pole piece and the action mechanism of the soil,and through the analysis of single pole piece bending Angle,bending radius,side,working width,cutting edge curve tangent plane high end face,long line of blade structure parameters,such as the effect of rotary cutting efficiency and surface soil,the influence of the single pole piece structure parameters combination with good performance.3.A single blade soil rotary cutting box test platform was set up to test the parameters such as torque,speed and power in the process of soil cutting with different bending angles.The effectiveness of the results of single blade structure optimization was verified by comparing with the simulation results.4.On the basis of the optimized single blade structure,a three-dimensional model of the combined cutter shaft was established,and the interaction mechanism between the combined cutter shaft and soil was analyzed by discrete element method.By changing the arrangement and combination of the blades and the cutter shaft,the overall soil breaking effect and power consumption of the combined cutter shaft are optimized,and the structural parameters of the combined cutter shaft with better performance are obtained.The results show that the utilization rate of useful work increases by 20.9% and the throwing force in the direction of soil bundling increases obviously.For the combined cutter shaft,the rotary cutting power consumption was reduced by 21.83% in the process of operation,and the soil crushing particles(the soil crushing rate is still recommended)was increased by 19.06%.Compared with the structure of the combined cutter shaft before optimization,the performance of rotary cutting and soil collection of the soil obtained after optimization was significantly improved.The research results of this paper provide a theoretical basis for the structure design of the rotary cutting soil gathering device of rice field bundling machine,which is of great significance for reducing the power consumption of the machine and improving the working quality of the machine.