Design and test of one-step centralized type pneumatic seeding system

To explore the performance factors of centralized air-seed metering system, according to the technical requirements for centralized planting device, the one-step centralized 2BQ-10 type pneumatic seeding system was developed. The test results indicated that the core part divider with the convex lid structure can save more energy than other two kinds of structures. The uniform variation coefficient of each line was decreased with the increase of the rotation speed of the metering device and the seeding rate. With the length of fold-shaped pressurized tube increasing little by little from 0, the trend of variation coefficient of each line increased at initial, and then decreased. When the seed metering speed was 38 r/min, sowing rate was 277 kg/hm2, fold-shaped pressurized tube length was 260 mm, the uniform variation coefficient of each line was 2.75%. The design and experiment can provide a reference for further research of centralized type pneumatic seeding system.