Parameter Optimization And Exerimental Study Of Key Components Of The Tooth-rod Chain Peanut

Peanut is an important oil crop and economic crop widely recognized in our country and around the world.Now it has become the main export product in our country.With the continuous improvement of our country's economy,the production of peanuts has been developed in the long run,and the planting area of peanuts in the whole country is also very wide.At the same time,China's peanut harvesting machinery is more mature than before,but there is still room for improvement compared with that of foreign countries.Especially,mechanical soil removal is one of the key technologies to be urgently solved.Most of the existing peanut harvesting machines have soil removal devices and can complete some soil removal operations,but there are still a certain amount of soil and even residue of gravel,and there is a problem of fruit loss.Therefore,it is of great practical significance to study the soil removal device of peanut harvester.On the basis of comparing the existing typical soil removal devices and domestic related literature,this paper optimizes the parameters of the key components of the tooth rod chain vibration removing device,and uses the method of combining theory and test to improve the effect of soil removal.The main contents and conclusions are as follows:(1)The physical and mechanical properties of peanut plant were studied.The plant height,pod width and fruit handle of different peanut varieties were measured.The plant height of different peanut varieties was generally 400 ~ 550 mm,and the pod width of peanut was 140 ~ 155 mm.Then the moisture content of different parts of peanut plant and the tensile strength of different parts of fruit stalk were measured,and the test results were analyzed.The regression curves of tensile strength between the same variety and peanut plant at different contact points were analyzed by SPSS software,and the relationship between the total test index and the moisture content was verified by quadratic function.The regression model is obtained.(2)Based on the plant physical characters of different peanut varieties,the parameters such as the width of tooth rod,the distance between tooth rods and the distribution of teeth were optimized,and the optimum parameters were determined for the angle of lift and transport inclination of the chain and the rotation speed of sprocket.The optimized tooth rod width is 45 mm,the distance between teeth rod is 55 mm,the optimum angle of tooth rod chain is 35 °,the width of tooth bar chain is 1200 mm,and the optimal speed of sprocket is 210 r /min.After parameter optimization,the weight of the whole machine is reduced,and the working energy consumption is reduced.(3)Taking Ironyinhua No.2 planted in loam soil as the test sample,taking thearrangement of vibration wheel,the speed of lift and transport chain,the spacing of vibration wheel group as the experimental factor,and the soil removal rate as the test index,three factors and three levels orthogonal experiment were carried out.Through the range analysis and variance analysis of the test results,it is concluded that the order of the primary and secondary factors affecting the soil removal rate of the test index is the arrangement of the vibration wheel,the speed of the lifting and transporting chain,and the spacing of the vibration wheel group.The arrangement of vibration wheels is the most significant factor affecting the soil removal rate.The optimal test scheme is to select the combination of11/10/9/8/7cm for the vibration wheel,the spacing of the vibration wheel is 40 cm,and the speed of the lift chain is obtained.It is 33.9 m / min for medium speed.At this time,the effect of soil removal is the best,and the rate of soil removal can reach 95.12.