PNEUMATIC SEEDER OF PRECISION SEEDING AND METHOD OF REGULATION THEREOF Russian patent published in 2021 - IPC A01C7/20 A01C7/08 

FIELD: machine building.

SUBSTANCE: pneumatic seeder of accurate seeding comprises at least one seeding element comprising a seed collection device with a perforated disk, which is intended for sampling of seeds. Difference in pressure is provided on opposite sides of the disc. Seed tube (17) is connected with seed collection device. Device is connected with disc to create pressure to create said pressure drop on said sides. Along said sowing tube (17) there is ejector (40), which is fed by compressed air supply (42) for pneumatic seed acceleration, separated by said seed collection device in direction along sowing tube (17). To change pressure of compressed air supplied to ejector (40) there is pressure changing device (43). Ejector (40) is located in intermediate area of sowing tube (17), which is not near seed extraction device. Ejector (40) is fed from sowing tube (17) and compressed air source (41), into which compressed air is supplied from compressed air supply (42). Device (43) of pressure change can be calibrated in accordance with typology of sown seeds. Also, pneumatic seeder of accurate seeding comprises computer (47) and storage device (46) configured to store multiple calibration curves of said pressure changing device (43) in accordance with typology of sown seeds. At that, computer (47) is made with possibility to set pressure change performed by pressure changing device (43) in compliance with specified calibration curves.

EFFECT: invention increases seeding rate while preserving uniformity and accuracy of seeds sowing.

10 cl, 7 dwg