Design And Experimental Study Of Lime Spreader Device Of Rotary Cultivator

We installed an oscillating tube type lime spreader on the rotary tiller aiming at modern agricultural production requirements. The spreader controls the volume through spiral structure and operates jointly with the rotary tiller which works on the whole land. The mechanism can finish lime spreading and rotary operation at the same time, thus lime and soil are mixed together. The design has good economic and social benefits because it improve slime spreading efficiency, reduces labor intensity, improves soil conditions, and avoids dust pollution.This paper proposed spiral feeding and oscillating tube type lime spreading by studying on the average particle size of lime powder, bulk density, angle of repose, internal friction coefficient, sliding friction angle, sliding friction factors and comparing current spreading method, and it established kinematics and dynamics model based on the movements of lime powder in spiral feeding, in the tube and in the air.With Solidworks software, we set up a virtual prototype model, did interference check, designed and calculated the structure of its key components; with ADAMS software, we set up the virtual prototype model of oscillating mechanism, and got the trajectory of the oscillation tube spout during the virtual operation and its displacement, speed and acceleration variation.With ANSYS, we did finite element analysis on the components of the spreading device. We obtained the feasibility of crank and the connecting rod design through static analysis, and optimized the structure size of the compost bin and the rack; We did the modal analysis on the feeding and oscillation mechanism and got the most significant modal information to the mechanical properties separately, which showed the components will not generate big noise at work, no resonance phenomenon.We built a prototype test bench, and did the test, which verified the stability of the spiral feeding, and defined the best ranging of single factor. Using Box-Behnken response surface design, we got the regression model between all factors and the horizontal and vertical uniformity coefficient of variation. With optimization analysis, we knew the optimal experimental conditions that influence lime powder spreading effect are tube frequency 3 HZ, tube angle 45 °, and machine forwarding speed 0.97m.s-1.