Determination of the effect of aspirator fan type and spead on vacuum di̇stri̇buti̇on in vacuum collectors and seeding discs in pneumatic sowing machines

In this study were used three different pneumatic seed drills. Each machine was connected to the tractor and the air suction pressures at the collector outlets and the planting disk were measured with a vacuum meter at two different PTO speeds of 450 min-1 (field conditions) and 540 min-1 (ideal working condition). With these measurements, the characteristic features of these machines were determined. In the measurements made, at the collector outlet of the first machine, 68.1 mbar at 450 min-1 PTO speed and 93.4 mbar at 540 min-1 PTO speed, and at the seed disc of the planting unit, 41.8 mbar at 450 min-1 PTO speed and 540 min-1 PTO speed. An average vacuum pressure of 62.0 mbar was measured. At the collector outlet of the second machine, 63.8 mbar at 450 min-1 PTO speed and 90.8 mbar at 540 min-1 PTO speed, and at the seed disc of the planting unit, 29.7 mbar at 450 min-1 PTO speed and 42 mbar at 540 min-1 PTO speed, An average vacuum pressure of 8 mbar was measured. At the collector outlet of the third machine, 89.8 mbar at 450 min-1 PTO speed and 114.8 mbar at 540 min-1 PTO speed, and at the seed disc of the planting unit, 62.8 mbar at 450 min-1 PTO speed and 92 mbar at 540 min-1 PTO speed, An average vacuum pressure of 7 mbar was measured. According to the results obtained, the benefits of the appropriate fan type that should be used in pneumatic seed drills and the benefits of the business were determined and the importance of this in today's conditions was emphasized. Keywords: Pneumatic Seeder, Fan, Air