Hydraulic characteristics and structure optimization of multi-channels fertilizer machine

LIU Min1, CHEN Yue-wei2
(1.College of Mathematics and Information Science, Guiyang University, Guiyang 550005, China;
2.College of Mechanical Engineering, Guizhou University, Guiyang 550025, China)

Abstract: Aiming at the precise fertilization requirements of the waterfertilizer integrated fertilizer machine, the hydraulic characteristics, structural optimization and experimental research of the multichannels fertilizer were carried out. The fluid simulation software FloEFD was used to research the suction amount and hydraulic characteristics of the multichannels jet suction pump by analyzing the fluid characteristics of single jet pump and multiple jet pumps in parallel. Then threechannels fertilizer absorber combination with the appropriate suction amount and better hydraulic performance was chosen based on the discipline of the number of channels, the suction amount and the hydraulic characteristics. The structural parameters of threechannels fertilizer absorber were optimized for the same suction amount of per channel and higher than before optimization,in which the proper length between the main pipe and the three jet pumps were determined. At last the prototype was developed for experiments. The experimental results indicate that the maximum relative error of the threechannels experimental suction amount is 2.57%, and the error of the suction amount between the experimental data and the numerical simulation data is less than 5% within a reasonable range, meanwhile the prototype has good stability for longterm operation.
Key words: numerical simulation; fertilizer absorption characteristics; structural optimization; prototype test