Analysis And Experimental Study On Self-balancing Performance Of Vibratory Subsoiler

Deep loosening cultivation can break the plow pan,increase soil porosity,enhance the circulation of soil moisture and fertility between plough layer and subsoil layer,prevent surface runoff,promote the crop root growth and development,and increase crop yields.Due to the large depth of deep loosening cultivation,the cultivation resistance of ordinary subsoil is large,which needs to be equipped with a large horsepower tractor to increase the production input of farmers.The vibratory subsoiler has the advantage of reducing the tillage resistance,but the vibration of the oscillation tillage machine is transmitted to the tractor,which has bad influence on the tractor and the driver,and seriously restricts its promotion and use.In this paper,on the basis of the vibratory subsoiler drag reduction research,further study the effective ways to reduce the vibration impact,and comfort,reliability analysis,to develop a self-balancing vibratory subsoiler.(1)Design the single group shovel vibration subsoiler,and carry out indoor soil tank test.Using quadratic regression general rotation design,the relationship between deep loosening shovel vibration frequency,amplitude,speed three working parameters and tillage resistance,vibration two test indexes was investigated.Using the Design-Expert response surface analysis,two indicators of regression model,and optimized analysis were got.Comprehensive analysis to get a set of drag and vibration reduction optimization solution:amplitude of 21 mm and vibration frequency of 4.2 Hz,forward speed of 3.4 km/h,under the group working parameters,compared with the vibrating deep pine,maximum vibration subsoiler of tillage resistance change is small,mean and minimum values of tillage resistance decreased 46.2%and 16.6%respectively.Compared with the single-objective optimization result,the change amplitude of vertical force is obtained by multi-objective optimization was decreased by 42.5%,which reduces the vibration effect.(2)Design the multi-group shovel vibration subsoiler,and carry out simulation test optimization.The multi-group shovel staggered vibration can realize the self-balancing of vibration subsoiler machine.In the experiment of staggered vibration phase Angle combinatorial optimization,the violent vibration of the multi-group deep loosening shovels can easily cause damage to the test equipment.The simulation of real vehicle experiment can avoid dangerous work environment test.The stress analysis of the tractor-vibrating subsoiler system was carried out.Based on Adams,the simulation model is established,modeling process including import 3D model,define contact force and the friction between tire and ground,load,etc.,in which the loading force of each group of shovels is derived from the results of tillage resistance in the soil bin test of single group shovel vibration.Theory and simulation analysis are mutually verified.The mean value of the supporting force of the rear wheel of the tractor is 27.8kN,26.4kN,with the error of 1.4kN,and the variation trend of the main vibration curve of the two is consistent.The influence of vibration on the driver was evaluated by using the weighted mean square root value,and the self-balancing performance evaluation index was established.Through MATLAB programming,the power spectral density function is used to calculate the mean square root value of the total weighted acceleration of the driving seat.Design test and optimize analysis using Design-Expert software,the sequence of initial phase Angle sequences were obtained.The vibration reduction ratio of the vibration subsoiler is more than 90%in these combinations,and the self-balance is realized in the operation of vibration subsoiler machine.(3)According to the results of simulation optimization,manufacture the self-balancing vibratory subsoiler,especially designed the regulating mechanism of the initial phase Angle.The soil bin test was carried out for the self-balancing vibratory subsoiler obtained by simulation optimization.TST5910 dynamic signal test analysis system was used to test the acceleration curve of each position on the test rack and gearbox.The vibration displacement curve is obtained by using the quadratic integral and spectrum analysis.Using vibration test and analysis method,the vibration test and analysis of self-balancing vibration subsoiler are carried out,combining the traction characteristics,the optimal phase Angle combination of self-balancing vibration subsoiler is obtained,[0°,180 °,180 °,0 °].Under the condition of this initial phase Angle combination,when the vibration frequency is higher(f=6.67Hz-8.33Hz),and the amplitude/eccentricity is relatively small(2-2.5),the reduction effect is significant and the vibration effect is small.(4)Based on MSC.Software series simulation Software,the fatigue reliability analysis method of vibration subsoiler machine frame was studied.Through the study of the fatigue analysis method and the handling method of the alternating load,the fatigue simulation analysis method for the vibration subsoiler machine frame is proposed.By using MSC.Adams,the rigid flexible coupling model of self-balancing vibration subsoiler was established,and the stress load spectrum of the frame was output.Then the fatigue life of the frame and the data of vulnerable points were obtained by fatigue analysis in MSC.Fatigue.Based on the conclusion of this paper,the design and development of 1ZS-460 self-balancing vibration subsoiler is carried out in Lianyungang in Jiangsu Province.The operation of the prototype is stable,which can reduce the traction resistance,break the plow pan,and form a loose soil effect.