MODELING OF MILLED STRAW HEAP SEPARATION IN AIR-FLOW CLASSIFICATOR WITH TWO PNEUMATIC DUCTS

Abstract

The functional diagram of a grain-cleaner with two ducts and certain air speed characteristics is described. Each pneumatic duct is segmented into blocks with various probabilistic characteristics of the airflow velocity distribution, various density composition and terminal velocities of each component. The mathematical expressions averaging the air separation indices full-width of two sequentially operating pneumatic ducts are defined. A stochastic quasi-static mathematical model of the operation process of a grain-cleaner with two pneumatic ducts is developed. The air-separation process at the specified manufacturing characteristics of the heap components, their fractional value in the heap, and of the structure of the airflow entering the pneumatic ducts, is simulated. The results of the parametric air-flow classification synthesis, the technological characteristics of its operation are described; the heap fractional makeup and measurable characteristics in each separated fraction are given; the possibility of the air-flow classification of the crushed haulm heap on the controlled factions with the output of 0,689 kg/(m∙s) is defined.