Improving the efficiency of air-grid grain-separators for cleaning sunflower seeds

Abstract

One of the possible ways to improve the performance of the air-sieve grain-cleaning machines of the MVU-1500 type is to modernize the feeding device of the sieve system of the lower sieve boot due to its design features, namely the shape of the surface and its coating, which will improve the quality of separation of the sunflower seed heap in the pneumatic channel for the final air suction. The optimal design parameters of the divider, at which their rational values are achieved, are: the divider length located at the lower sieve boot 613mm; the friction coefficient of the divider surface f = 0,065, corresponding to the fluoroplastic-4 material; the divider inclination angle 34.06 degrees. With these optimal values of the divider design parameters, sunflower seeds are obtained of high quality, meeting the agrotechnical requirements of OST 70.10.2-82, with its rational productivity, which is W = 1.68 t/h compared to the series-produced one (W = 1.4 t/h) depending on the composition of the heap of seeds.