Analysis Of Anti-drag Performance For Vibrating Bionic Subsoiler

The operation of subsoiling can break firm plow sole of soil, deepen the topsoil, improve soil structure, reduce the damage of wind erosion and water erosion, add soil moisture content, and improve the living environment of plants’ roots. However, the problem of greater cultivation resistance and higher energy consumption still exists in subsoiling, so reducing tillage resistance and improving the quality of farming have became the key point of subsoiling research. In this paper, the study about vibration drag reduction performance of bionic subsoiler can put a new idea and method for developing the subsoiler of small cultivation resistance and subsoiling effect better. The research work and conclusions of the paper are listed as follows:(1) Through the analysis of the excavating performance among the different creatures, the badger can be ascertained as the bionic creature in the design. Reference to the structure and dimensions of national standard and the badger claws curve can be extracted, fitted and magnified final design the subsoiler. And putting forward the material requirements and manufacturing requirements for the bionic subsoiler object manufacturing.(2) The designed bionic subsoiler is analyzed of stress in the ideal condition. And the result is that the theoretical stress of bionic spade point is 1012.23 N and the bionic share shaft stress is 378.63 N. According to the analysis results of the theoretical stress, the paper analyzed finite element static force of the bionic subsoiler spade point and the share shaft. Finally it worked out that the maximal Von Mises stress of spade point is 110.19 MPa, the maximal displacement of spade point is 0.11497 mm, the maximal Von Mises stress of share shaft is 38.91 MPa, and the maximal displacement of share shaft is 0.49545 mm. The maximum stress of the spade point and share shaft are less than the allowed stress, so this design conforms with the design requirements.(3) The indoor soil bin contrast test was did to compared the bionic subsoiler and the national standard subsoiler, so as to study the drag reduction effect of the bionic subsoiler. This research studied the effects of the bionic subsoiler spade point and share shaft on the drag reduction by studying different combinations with spade point and share shaft of the bionic subsoiler and the national standard subsoiler.(4) The results of the contrast test on the drag reduction showed that the tillage resistance of the bionic subsoiler increased with the increase of work speed and tillage depth and depended on the interaction of them. Compared with the national standard subsoiler, the bionic subsoiler’s tillage resistance decreased by 13.33% ~ 21.72% and the drag reduction effect was obvious. If the bionic share shaft combined with the national standard spade point, the tillage resistance will be reduced by 3.01% ~ 7.61% compared to the national standard subsoiler. While the combination of the bionic spade point and the national standard share shaft decreased by 7.67% ~ 16.97% than the national standard subsoiler in the tillage resistance. Thus the difference of the drag reduction effect of the bionic spade point and the bionic share shaft was significant.(5) Studied the drag reduction mechanism and vibration mode, this experiment used the self-excited vibration mode as the mode of vibration. Also, in order to study the effect of drag reduction vibration on the bionic subsoiler, the contrast experiments were did to analyze the vibration drag reduction of the bionic subsoiler.(6) According to the drag reduction vibration test, the tillage resistance of the bionic subsoiler under the condition of vibration was reduced by 13.05% ~ 18.94% compared with the no vibration condition; and the drag reduction effect was obvious.