Actual Problems in Machine Building 2015 No. 2

Actual Problems in Machine Building. 2015. N 2 Technological Equipment, Machining Attachments and Instruments ____________________________________________________________________ 238 NUMERICAL CALCULATION AND ANALYSIS OF THE PARAMETERS OF SCREW CONVEYORS Kerzhencev V. A., Ph.D. (Engineering), Associate Professor, e-mail: kerjencev46@ngs.ru Perova N. V., Assistant, e-mail: perova@corp.nstu.ru Bredikhina A. N., Student Pechorkina N. S., Student Novosibirsk State Technical University, 20, Prospect K. Marksa, Novosibirsk, 630073, Russian Federation Abstract This article presents an analysis of the numerical calculations of screw conveyors. Calculation data is compared with the technical features set forth in the passports of these conveyors. Discordance between calculations and passports values is identified by the analysis of the results. Formulas that can be used to calculate the parameters of screw conveyors, depending on the given performance, are presented to identify the reasons of this discordance. New obtained numerical parameter values when plugging in the formula of performance led to the values specified in passports. Similar calculations for the engineering capacity for a variety of formulas that give quite comparable with each other values are presented. Comparison of the numerical performance, capacity and other values (rate of the screw rotation, linear load, driving force) points at the possibility of the use of new calculation formulas without loss of the calculation accuracy. Keywords screw conveyors, specifications, performance, capacity, screw diameter, rotational speed, linear load, driving force