Abstract
In the article the results of studying of the equipment up-to-date condition and grading bulk construction solids theoretical examining on different fractures especially damp materials of bed, lamellar and stylus forms were obtained. It is shown that operating now plane vibration or drum screens do not satisfy to the process of grading non-metallic materials. The article considers processes of screening bulk material on the spiral vibrating screen. The screen rational parameters, which provide product of the high quality, decreasing of consumed power and increasing of efficiency, were determined. Mathematical model of the spring spiral, a spiral vibrating screen is developed. Let’s study spring spiral in two positions - static and dynamic. In the result of making static and also dynamic models we got dependences for determining the lateral strain of spiral turns. Pre-condition for making the given model is the condition of complete spiral loading with input bulk material providing rational values of screening efficiency and effectiveness. The obtained mathemati-cal model of springing spiral, spiral vibration screen will allow to produce qualitative analysis of work of totally new innovating screen
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