Design And Experimental Study On The Forced Vibration Subsoiler

Long-term unreasonable farming practices and the use of large farm machinery have led to the formation of a hard plow pan on the soil.Subsoiling can break the plow pan,effectively improve soil quality.However,the current development of subsoiler has a series of obstacles.In view of the common problem of subsoiling resistance and high energy consumption of subsoiler at present,based on the principle of forced vibration subsoil,a forced vibration subsoiler was designed.Through the establishment of a "soil-subsoiler's shovel" force model,the soil and subsoiler's shovel are subjected to force analysis,using Matlab-Simulink to explore the impact of vibration parameters on resistance,using 3D modeling software Solidworks to model the design of the model,using the finite element software ANSYS to conduct the static and modal analysis of the key components,using LS-DYNA to simulate soil cutting processing.Prototype for field experiments and analyzed the effect of subsoiling.The main research results are as follows:(1)Through the establishment of a "soil-subsoiler's shovel" force model,the soil and subsoiler's shovel are subjected to force analysis and MATLAB-Simulink simulation model are established to explore the relationship between vibration cutting and resistance.The simulation results show that soil vibration cutting can reduce the cutting resistance,at the same time,the vibration frequency is high and the amplitude is big,which is beneficial to drag reduction.(2)The forced vibration subsoiler is designed based on the forced vibration and drag reduction mechanism,and using Solidworks software to carry out three-dimensional modeling of the whole machine.Design and check the key institutions(subsoiling institutions and eccentric institutions)to ensure that the design requirements are met;through the simulation of ANSYS,the equivalent stress,equivalent strain and total deformation cloud of the eccentric shaft are obtained,the main stress and deformation parts are analyzed,the modal analysis is carried out and by strengthening to ensure the reliability;using Caxa to draw two-dimensional engineering drawing,process and manufacture forced vibration subsoiler prototype.(3)In field experiments,single factor experiments were used to qualitatively study the effects of subsoiling,tillage speed and vibration on the drag of subsoiler's shovel,under certain conditions the main research contents are as follows:with the increase of tillage depth and tillage speed,the resistance to tillage increased;substantial vibration significantly lower than the non-vibrating farming resistance;specificly,under the same tillage speed:in the case of 25 cm deep plowing,the average drag reducted by 12.4%;in the case of 30 cm deep plowing,the average drag reducted by 13.27%;in the case of 35 cm deep plowing,the average drag reducted by 13.97%;under the same tillage depth:when the tillage speed is 2.5km/h,the average drag reduction of 15.53%;when the tillage speed is 3.0km/h,the average drag reduction of 11.43%;when the tillage speed is 3.5km/h,the average drag reduction of 12.68%;conclusion reflects that vibration subsoiling can effectively reduce the subsoiling resistance and farrowing deeper,drag reduction effect is better;(4)The subsoiling effect was evaluated by soil properties(soil penetration resistance,soil density,soil moisture content and soil disturbance coefficient).The results showed that whether or not the soil is vibrated,subsoiling can reduce the firmness and density of the soil in the plough layer,but the vibration effect is even more pronounced.Specificly,soil compaction at 0-15 cm soil layer,non-vibration was reducted by 11.04%,vibration was reduced by 36.42%;at 15-30 cm soil layer,non-vibration was reducted by 13.38%,vibration was reducted by 39.05%;at 30-45 cm soil layer,non-vibration was reducted by 9.80%,vibration was reducted by 26.95%;soil density at 0-15 cm soil layer,compared with plow and non-vibration conditions,vibration was reduced by 6.18% and 2.91%;at 15-30 cm soil layer,compared with plow and non-vibration conditions,vibration was reduced by 10.81% and 9.34%;at 30-45 cm soil layer,compared with plow and non-vibration conditions,vibration was reduced by 4.55% and3.45%;due to the time factor,the change of soil water content is not big;soil bulkiness and soil disturbance coefficient are 17.79% and 53.90%;stability coefficient of subsoiler depth is 96.34%,have good subsoiling stability and meet every test indicators,indicating that the forced vibration subsoiler subsoiling effect is good.