Experimental Study On The Soil Collector Of Rotary Tillage And Ridging Combined Operation Machine For Paddy Field

The construction of the ridge in paddy fields is a crucial field task in the production process.At present,the rice production process basically depends on manpower for the construction of paddy fields,which not only increases the working intensity of farmers,but also receives poor building effects,and it cannot meet China's actual requirements for cost-saving and efficiencyenhancing production.In this paper,a rotary tillage joint operation machine for water field is taken as the research object,and design and experimental study of the soil collecting parts are carried out in order to improve the quality of its construction.The main research contents are as follows:(1)Design of soil collecting parts.Consulting relevant information,the soil collecting parts of the ridger is divided into two parts: the rotary cutting and soil collecting device and mouldboard plow soil shovel.After combining the advantages and disadvantages of the two devices,a double-disc collector is redesigned.Based on the discussion of the amount of soil collecting and the radius of curvature of the disc,the diameters of the double disk collectors are determined to be 450 mm,550mm and 600 mm respectively.The test results of single factor diameter show that the double disc collector with diameters of 550 mm and 600 mm can meet the requirements of the amount of soil required for building the ridge.Finally,the 550 mm doubledisc installation with the most reasonable amount of soil collecting is selected.In the preparation of the soil collectors,in order to solve the clay problem on the disc surface,the method of changing the surface material to reduce the clay,i.e.PTFE coating,is taken after comparing several existing measures to improve the surface finish.The test finds that the effect is significant.(2)Experimental test.After determining the specific test equipment,the unit's forward speed and the assembly inclination angle of the collector are taken as experimental factors,and three levels are selected respectively,and the test scheme is formulated accordingly.Based on this,the test plan is formulated.According to the factor level,the orthogonal test is conducted.The test index for checking the final building effect is the compaction and uniformity of the soil.In order to reduce the possibility of random errors affecting the experimental indicators,each set of tests is repeated three times,using their average values as indicators;in order to reduce errors caused by external conditions,the test sequence is randomized.The test results show that when the double-disc collectors are assembled at a 25° tilt angle and the average traveling speed is 1.65km/h,the compaction degree of the earth ridge reaches the best 108.81 KPa,and the coefficient of variation of the uniformity of the soil ridge is 1.63.Moreover,the optimum combination is compared with the plow collector.(3)Static analysis of column of collector.The finite element analysis software ANSYS is used to analyze the statics of the soil collector column: modeling,force loading,solution analysis,and finally reached the conclusion that the maximum amount of column deformation of the collector is 0.073 mm,and the maximum equivalent stress is 135.5 MPa.All of them are lower than the allowable deformation value and stress value of column material of No.45 steel.Therefore,the rigidity and strength of the collector column meet the technological requirements.Under the premise of the same constraint conditions,the quality of the column is optimized,and the weight is successfully reduced by 20%.The optimized design is more safe and reasonable.