Design Of Curved Water Separator Imitating Mussel For Pneumatic Supplement Fortilizer Deep Application Machine For Paddy Rice

Deep application operation of supplement fertilizer for paddy field can significantly increase the utilization efficiency.The positioning of fertilizer has become a difficult problem in the research and application of deep supplement fertilizer application technology and equipment,due to the influence of rice plants,surface weeds,deep water covering on the paddy field surface and long-term sedimentation of paddy soil.This paper carries out,bionic design and simulation analysis on the water separator of a pneumatic supplement fertilizer deep application device proposed by our team,and the parameters are optimized to reduce drag in water divider and decrease the resistance of fertilizer into paddy soil.The main research contents and conclusions are as follows:1)By referring to relevant literatures,the habitat environment and its streamline shape characteristics of mussels were analyzed,and the mussels are determined as bionic targets.The characteristics of its geometric parameters and speed of three common varieties of mussels were measured,and the 3D appearance was scanning and the physical model was built.It provides basis for the subsequent structural design and simulation test.2)Bionic design of water separator based on biological characteristics of mussel.Extract the contour curve of the mussel head,the contour curve of the head is applied to the water surface of the water divider,and the body characteristic curve is applied to the water divider design.3)The mechanical analysis of the process of water diversion was carried out,the results show that the forward speed,length and width of water diversion will increase the total forward resistance.The structural parameters of the divider was determined,the length is20 cm,the width is 3.5cm,and the tail width is 1.5cm.4)Single factor simulation experiment on water divider based on ANSYS/Fluent were carried out,the effects of the head shape of the clam,the forward speed of the water separator,the length of the water separator,the width and width of the tail on the performance of the water separator were studied.The reasonable value ranges of the head shape of the clam and the forward speed,length,width and width of the tail of the water separator were determined,which laid a foundation for the combination test and parameter optimization of the water separator.5)On the basis of single factor simulation test,the regression model of each test factor,total resistance of water divider and reflux position is established through combined simulation test,and the influence law of each factor on water divider performance index is analyzed.According to the importance of each index factor on water performance,the influence weight is determined,and the optimal parameter combination is finally obtained,that is,the forward speed of water distributor is 1m/s,the length of water distributor is 21 cm,the tail width of water distributor is 4.5cm,and the width of water distributor is 7cm.Under this parameter,the total resistance is 5.47 N,the optimal vertical distance between the reflux position and the Y axis is 5.83 cm,and the vertical distance between the reflux position and the X axis is 1.70 cm.6)The experimental system was set up,the total resistance and backflow of the bionic water separator at different speed was tested.The results show that the bionic divider can reduce the resistance by 20% compared with the ordinary water segregator,the actual backflow of bionic separator is consistent to the simulation result,The designed water divider can meet the requirement.