Abstract
Learning from the microstructure of the convex (concave) and ridging (triangle and arc-shaped) shapes of fresh lotus leaves and shark skin, bionic ridging shovels was designed with the characteristics of adhesion and resistance reduction. Ten ridging shovel models were established, and the interaction process with the soil by ANSYS is discussed. Stress analysis results showed that the bionic ridging shovel was more obvious in visbreaking and in the resistance reduction effect. An indoor soil bin experiment with the bionic ridging shovel and the prototype ridging shovel was operated as follows: the ridging resistance of the three types of ridging shovel was tested under the condition of two soil moistures (18.61% and 20.9%) and three different ridging speeds (0.68, 0.87, and 1.11 m/s). In this article, the structure, the mechanism, and their relationship to the functions are discussed. The results of this study will be useful in practical application in the field of agricultural machinery toward practical use and industrialization.
Highlights
An analysis of this study showed the change rule of the forward soil resistance and the vertical soil resistance of the ridging shovel (RS)
The maximum stress of the four types of bionic trough RS appeared in the tip of the bionic trough structure, and the smaller stresses appeared around the bionic trough
The experimental design is conducted under the condition of two levels of soil moisture
Summary
Conservation tillage technology is widely used. It is important to select the conservation tillage technology according to the local conditions in different types of farming areas. To resist the adverse effects of the climatic characters in the dry farming areas of Northeast China, the ridge culture of conservation tillage technology[1] is commonly used. Ridge culture technology is used to ridge and till regularly, according to a certain width, space, and direction; it is used to plant crops in cultivated ridges. This technology can eliminate soil-hardening deterioration, diminish loose soil, reduce soil bulk density, and increase soil porosity. During the course of ridge cultivation, soil adhesion to the ridging shovel (RS) is inevitably produced as the contact soil part of the ridging machine contacts oil and slips along the relative interface.[5].
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