| China is a large agricultural country, there are nearly 95 million hectares of arable land, of which the arid, semi-arid and humid arid area accounted for nearly 52.5%.This leads to our country requires a large amount of water for irrigation in agricultural production, while China is also a lack of water country, and has under-developed irrigation level compare with other countries. While conventional tillage also resulted in arising of plow and loss of soil and water,even soil desertification and other hazards. This requires us to change the traditional farming methods, and develop conservation tillage. Conservation Tillage of soil were generally less tillage or no tillage, subsoiling is one of the important measures of conservation tillage, and more and more people pay more attention to the introduction of subsoiling.Subsoiling machine can break the plow and increase soil water storage capacity, reduce the runoff from rain to reduce soil erosion, increase soil fertility to make the plants grow stronger. It can improve the crop yield and the quality of crops in different degree. But the subsoiling machine now there are a lot of problems, such as tillage resistance, subsoiler attrit seriously and have a lacking adaptability.In view of the above problems, this paper designed a variety of bionic subsoiler. These subsoilers were respectively simulated with mice toe shape structure, Spermophilus dauricus and mole cricket claw toe shape structure, as well as dung beetle head non smooth surface to design subsoiler. At the beginning of the design, stress of the subsoiler is analyzed. During the design using a UG9.0 raster image function, the image will be inserted into the contour design software. After the completion of the design it can be programmed using CAXA, then NC machining.. According to the domestic rats toe, Spermophilus dauricus and mole cricket claw toe are designed with different shapes subsoiler handle. According to the surface of non smooth head of dung beetle was designed with the convex hull of subsoiler tip.During the experiment, using the JB/T 9788-1999 standard circular arc type subs oiler and the subsoiler which has existed in Nong Haha groups as a comparison ob ject. Measured using a strain gauge affixed manner to measure the resistance, in t he measurement process using the half-bridge differential circuit to measure. At t he same time, in order to measure more accurately, calibratiing the subsoiler separ ately, and test after the completion of calibration.. In the process of measurement plowing depth of 25 cm and 30 cm working resistance were measured separately. A fter measuring the resistance, the experimental data were processed. After the expe riment, we discovery depth great influence on subsoiler, when thetillage depth dee pening increases, the resistance increases rapidly.The research indicates that tillage resistance more smaller compare the bionic subsoiler with arc JB subsoiler and the subsoiler which has existed in Nong Hahagroups.But there are also designed subsoiler cannot reach the drag reduction effect.The study provides a theoretical basis for the design of a new type of subsoiler, but also provide some ideas for the subsoiler design. |
