Development of a pneumatic drum-type seeding apparatus for two-row seeding soybean and mung bean

Developed pneumatic sowing device of drum type for two-line sowing of soybean and mung bean seeds and study its technological process of work sowing bean seeds. When developing the design of a pneumatic drum-type sowing device for two-line sowing of seeds, methods were used for designing seeders and their working bodies, methods for calculating sowing devices and pneumatic systems. The experiments were carried out in accordance with State Standards 31345-2007 and State Standards 20915-2011. In the course of research, it was determined that taking into account the size of soybean seeds and their seeding rates, the diameter of the suction holes of the seeding drum can be taken dt = 4.5 mm, the diameter of the seeding drum D = 230 mm, the pitch between the suction holes of the drum should be t ≥ 11.21 mm, and holes in the seeding drum number z ≤ 55 pieces. At a seeder speed V_c = 2.1 m/s, a drum diameter with suction holes D = 0.230 m, a hole pitch t = 0.011 m, the drum speed is n = 0.377 s⁻¹ or n = 22.6 rpm. With these parameters, on the developed pneumatic sowing device, the distance between the seeds was 119.0 mm, and between the rows 207.8 mm at their specified values, respectively, 120 mm and 200 mm. The developed sowing device, on the basis of theoretical and experimental studies, ensures sowing of soybean seeds with a deviation from the specified distances between seeds ± 6.8 mm and between rows ± 4.5 mm and meets the requirements.