Pelykh I. Substantiation of rational parametres and development of dynamically active-card grate screening surface of vibrating screens.

The thesis is devoted to improving dynamically active polymer vibrating sieves, composite elastic elements, which directly form the sieve cloth, vibrators installed in ducts without pre-strain data. In this paper the screening surface, dubbed - samoochitsayuscheesya sieve grate-card URCC, the main functional units of which showing metal multicomponent fire-bar support and removable elastic elements having a card-type configuration with curvilinear curved working surface of variable thickness. With the help of software products, simulation systems of strength problems and mathematical physics, realizing the finite element method, revealed forms and frequencies of bending oscillations of elastic elements URCC, so defined by their specific geometric shaping parameters allowing to achieve the optimal frequency oscillatory phase adjustment URCC system - vibrating screen in a resonant mode. Established and practically confirmed by tests in laboratory and industrial conditions, dependence on the effectiveness of the screening process URCC from various regime parameters - the amplitude and frequency of the oscillations, the specific weight load on the power supply source, the percentage of undersize in grohotimom material, moisture of the material. Experimental-industrial testing URCC allowed on 10-15% increase in the efficiency of the sorting-calibrating coke and proven efficiency and reliability of the solutions, which is confirmed by the introduction of the relevant act. Keywords: vibrating screen, screening efficiency, self-cleaning grate-card sieve, the amplitude and frequency of the oscillations, the grate-card element, oversize and undersize.