Design and test of high speed seeding system for wheat wide seedling belt
In order to improve the quality of wheat wide seedling belt sowing and corn rotation planting,a new agronomy of wide seedling belt wheat sowing matching with corn rotation planting was developed,and a high-speed metering device of wheat wide seedling belt was designed according to the requirements of newly developed agronomy.The key structural parameters were analyzed theoretically,and the theoretical model of parameter determination was established.With the help of discrete element simulation software,the structural parameters of the seed metering device were determined.The bench test of the designed wheat wide seedling belt sowing system was carried out.The results showed that the coefficient of variation of the total seeding displacement stability,the coefficient of variation of each row displacement consistency and the seed breakage rate all met the national requirements.The average width of the seedling belt measured in the test was 12 cm,which was consistent with the theoretical design width.The field experiment was carried out,and the regression modeling and variance analysis of the experimental data were carried out by Design-Expert.The regression equation was analyzed by using the established optimization model.The results showed that when the rotation speed of the metering wheel was 40 r/min and the operation speed of the machine was 10 km/h,the minimum coefficient of variation of the inter-row displacement consistency of the prototype was 1.69%and the qualified rate of the seedling belt distribution reached 95.1%.
wheatwide seeding belthigh speedseedingdiscrete element
NETL
NSTL
万方数据
