Study On Key Components And Holistic Device Of Cultivator Surface Tillage And Weeding Equipment Of The Ridge Cropping System

Based on the research of the existing shallow equipment,this paper designs a kind of rotary operation device combined with the rotary type and the shovel type,which is based on the research of the existing shallow equipment.The working parts are improved to the rotating hoe and are adapted to the ridge-shaped operation.The tapered roller is used to ensure that the large diameter ends of the drum are not leaked,the small diameter ends are close to the crop roots,and only the soil is loosened to form the pore structure without substantial disturbance Soil,damage the roots of crops,with a view to reducing the power consumption of traditional operating equipment,reduce the risk of injury and injury rate,for the key components of the operating equipment for theoretical analysis,computer simulation and parameter optimization test,and complete the trial system.The main contents of the study are as follows:(1)According to the characteristics of ridge planting pattern,the ridge size is measured in real time and the ridge size is plotted.Based on this,the theoretical design of the tapered drum is designed and the slippery curve,The width of the blade,the angle of the horn and the horn on the drum.At the same time,the design of the main frame of the shallow machine,so that it can carry the tapered roller single hinge profile,the depth of the device,shallow pine soil shovel imitation frame,shallow pine soil shovel with four-profile,to ensure that the soil shovel into the soil angle The tapered roller is a rotating part,and the single hinge can be used to meet the job requirements.The depth of the device is built into the screw,and the upper handle can be shaken to adjust the height of the deepening wheel to control the depth of the loosening device.Using Solid Works three-dimensional mapping software for three-dimensional solid modeling,and then complete the ridge tillage shallow machine device design.The kinematic analysis of the conical drum is carried out,and the kinematic equation is listed for the hoe teeth.The operation principle of the cone roller is analyzed by graphic method.(2)The kinematic simulation software ADAMS was used to simulate the tapered drum of the key components.The trajectories of the three rows of hoe teeth on the drum were observed respectively.At the same time,the traditional rotary working parts were added as a contrast.The results show that the structural characteristics of the conical drum Of the active effect.Through the ADAMS reprocessing program,the speed and acceleration curve of the hoe tooth and the contrast curve are obtained.With the decrease of the rolling radius,the theoretical speed and acceleration of the hoe tooth tip are increasing,and the tapered roller The actual speed and acceleration of the tip show a tendency to decrease,and when the radius of the drum at the position of the hood is larger than the rolling radius,the actual speed and acceleration of the hoe tooth tip are greater than its theoretical speed and acceleration.When the radius of the drum is smaller than the radius of the roll,the actual speed and acceleration of the hoe tooth tip are smaller than its theoretical speed and acceleration,and the speed and acceleration of the hoe tooth are farther away from the rolling radius.The The stress cloud,strain cloud and deformation cloud of the conical drum are obtained by using the Solid Works finite element analysis module to ensure that the designed tapered roller strength meets the requirements and modal analysis of the conical drum is carried out.Modal and its natural frequency,the external excitation frequency range is less than the natural frequency of all modes,does not produce resonance phenomenon.(3)The results show that the working depth,the spring pressure and the hoe-tooth spacing are the factors.The soil depth stability and the soil robustness difference are the experimental indexes.The three-factor three-level orthogonal test is carried out by means of the range analysis,the variance analysis and the comprehensive weighting The main order of the factors that affect the performance of the shallow machine is the operating speed,the spring pressure,the hoe tooth spacing;The best combination of parameters: operating speed of 1.0 m/s,spring pressure 920 N,hoe tooth ring spacing 42 mm.Soil trough test vehicle forward speed of 1.0 m/s,spring pressure 920 N,hoe tooth spacing 42 mm in the case of shallow test,The results show that the soil robustness difference is 29.8 N/cm2 and the soil depth is 93 %,which satisfies the performance requirement of the tillage in the seedling stage.