Authors: V.A. Evstratov, E.Y. Voronova, A.S. Apachanov, V.I. Grigoryev, Sukharnikova , I.V. Breslavtseva

Title of the article: Efficiency improvement of the screw modules of mining machines

Year: 2021, Issue: 2, Pages: 42-47

Branch of knowledge: 05.05.06 Mining machines

Index UDK: 622.23.05

DOI: 10.26730/1816-4528-2021-2-42-47

Abstract: The screw modules that are part of mining machines, along with such advantages as continuity of transportation, leak tightness, possibility of transporting dust cargo, have a major drawback. The moving material moves along a spiral path, which significantly reduces equipment productivity and increases unit energy consumption. The work is considering the possibility of reducing the rotational component of the movement of the material and increasing the onward component of the movement thereof in the screw channel of the screw module by creating conditions of anisotropic friction when the material moves along the internal surface. The conditions of anisotropic friction are created by ribs mounted on the internal surface of the module. The kinetic energy theory is used to determine the direction of movement of the material under anisotropic friction conditions. Geometric characteristics of the internal surface of the body of the screw module which provide for anisotropic friction during the movement of the material, are determined on the basis of the operating conditions of the machine and the physical-mechanical properties of the materials being moved. Computer simulation results show that the correctly chosen geometric parameters of the internal surface of the body of the screw module make it possible to increase the performance of the screw module by 18-20% by increasing the onward component of the movement of the material and reducing the rotational component. The resulting dependencies can be used in the design of screw module tubes.

Key words: Screw modules torque screw shaft material mass sliding surface coefficient of internal friction of the material the angle of the helix of the screw anisotropic friction kinetic energy

Receiving date: 28.02.2021

Publication date: 29.04.2021

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