Abstract
Possible ways to improve operating elements of grain cleaning machines due to mobilization factors directly influence on qualitative and quantitative aspects of separation are presented. In relation to sieve grain cleaning machine the technological process of grain mixture separation on the sieve is presented as a block diagram. Some variants of mathematical description (models) consideration of grain material separation process are also given. The dependencies between parameters of grain material and uniformity of seed distribution on sieve area are given. Calculation formulas and schemes of definition probability of a particle entering the hole are presented. It is established, that in the range β from 0 to 30° probability of particle passage increases from 0.315 to 0.548, that is 1.74 times.
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