Vibrations in engineering and technology

Fedoskinа O.V. Ph.D., Associate Professor, Associate Professor of Engineering and Generative Design Departement, Dnipro University of Technology, St. Yavornytsky, 19, Dnipo, Ukraine, 49005, e-mail: fedoskina.ev@gmil.com

Yerisov M.M. Assistant of the Department of Automobiles and Automotive Economy , Dnipro University of Technology, St. Yavornytsky, 19, Dnipo, Ukraine, 49005, e-mail: erisov@ukr.net

Fedoskin V.O. Ph.D., Associate Professor, Associate Professor of the Department of Automobiles and Automotive Economy, Dnipro University of Technology, St. Yavornytsky, 19, Dnipo, Ukraine, 49005, e-mail: fedoskin.va@ukr.net

Kornilenko K.I. аssistant of the Department of Automobiles and Automotive Economy, Dnipro University of Technology, St. Yavornytsky, 19, Dnipo, Ukraine, 49005, e-mail: Kornilenko_K@gmail.com

The article deals with the theory of the movement of material in the vibrating conveyor of a drying installation developed at the National Technical University Dnipro Polytechnic, whose working surface has a stepped shape and the flow of coolant is directed at an angle to the horizontal plane. This constructive solution implements a method of creating a vibrating fluid layer in the working chamber, which significantly increases the drying speed of finely dispersed material. The working surface of the vibratory conveyor is made in the form of a step-shaped grid. Under the action of directional vibration excitation, the material entering drying moves along the grating surface and is blown through the slits with hot air. A feature of the vibro conveyor is the ability to move material with a wide granulometric composition, which includes fractions of grains from micrometers to tens of millimeters. When considering the movement of material along the working surface of the vibratory conveyor, it is possible to distinguish the loading zone and the transportation zone. In the loading area, the material is accepted into transport condition. In the transport zone, the material is subjected to an additional force from the coolant. For the efficient operation of the vibratory conveyor, the speed of movement of the material in the loading and transportation zone must be equal, which requires a comprehensive consideration of this issue. The mode with the separation of the material from the working surface of the vibrating conveyor with the assumption of the absence of air resistance is considered. Differential equations have been compiled and dependencies have been obtained that establish the relationship between the movement parameters of the material in the loading area of the vibrating conveyor, where there is no coolant flow, the angle of inclination of the working surface, width and angle of inclination of the plates forming the surface of the gas distribution grid.

The conditions under which the contact of the material particles with the coolant flow is determined. Differential equations of particle motion taking into account the influence of the air flow on it are obtained, and dependences are obtained that determine the height of the gas distribution grid stage, the angle of inclination of the coolant flow to the horizontal plane, the motion parameters of the material particle with the additional effect of the heat carrier pressure on it.

Thus, the proposed method of calculation allows obtaining initial data for designing the loading section of the transporting surface and the first stage of the gas distribution grid of the vibrating conveyor of the drying unit, as well as analyzing the influence of design parameters on the movement of a material particle.

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