SUBSTANTIATION OF TECHNOLOGICAL PARAMETERS OF SPIRAL ROLL OF MACHINE ROLLER- BEDFORMER FOR HARVESTING ONIONS

Abstract

When harvesting onions, it is very important to maintain the soil in a loosened state, since the slotted working bodies used in the separation are not able to separate the soil impurities from the bulbs, since it is small and when separating from the soil impurities it is difficult to separate. Qualitative indicators of cleaning are deter-mined by how well the previous technological operations are performed. A specific feature of onion harvesting is the need for such an agrotechnical technique as ripening and drying the bulbs after removing them from the soil. The high-quality work of the harvesting machines, both in two-phase and single-phase methods of harvesting, is ensured by satisfactory preparation of the field before harvesting. Consideration is given to improving the quali-ty indicators of mechanized harvesting of onion-seedlings, due to the unsatisfactory process of separating the bulbs from solid soil lumps, due to the fact that the slotted working bodies used in the separation are not able to isolate solid lumps comparable in size to the pile of onions. In order to intensify the harvesting process, onion sets when selecting from rolls, in order to exclude or reduce the take-up and pick-up part, together with the bulbs of soil lumps and feed the onion pile to the separating working parts, a roller-bedformer is used as part of the machine for the first phase of onion harvesting. The article presents a constructive-technological scheme and a general view of a roller-bedformer that intensifies the process of separation of onions in the second phase of harvesting. The article reflects the results of theoretical studies on the substantiation of the technological param-eters of spiral roll of machine roller-bedformer for harvesting onions.