Design and testing of seed-metering device key components for pneumatic conveying sesame seeder

Aiming challenges such as sesame seeds' small volume, light weight, and susceptibility to environmental influence, as well as unsatisfactory sowing accuracy, seed protection, and uniformity during planting process, a hole type sesame precision seeder was designed．This device could control sowing accuracy and reduce seed damage during sowing process．Structure and working principle of seed-metering device were described．Through simulation, different holes types sizes and structures were compared and analyzed, and seed-metering tray with hole types was optimized．Field testing results showed that optimal quality index for sesame seeds were achieved at seed-metering device rotation speed of 15 r/min．A valuable reference for sesame precision sowing was provided．