Kiriia R.V., Monastyrskyi V.F., Mishchenko T.F. Influence of the angle of the slope of the side rollers on the limit angle slope conveyor with a deep groove belt

Details
Parent Category: Geo-Technical Mechanics, 2018
Category: Geo-Technical Mechanics, 2018, Issue 143

Geoteh. meh., 2018, 143, 173-182

https://doi.org/10.15407/geotm2018.143.173

INFLUENCE OF THE ANGLE OF THE SLOPE OF THE SIDE ROLLERS ON THE LIMIT ANGLE SLOPE CONVEYOR WITH A DEEP GROOVE BELT


1Kiriia R.V., 1Monastyrskyi V.F., 1Mishchenko T.F.


1Institute of Geotechnical Mechanics named by N. Poyakov of NAS of Ukraine
UDC 622.647.2:621.867.2
Language: Russian
Annotation.
Many researchers were involved in determining the maximum angle of inclination of a conveyor with a deep groove belt. However, there are currently no studies determining the effect of side rollers on the maximum angle of inclination of a conveyor with a deep groove belt. The limiting angle of the conveyor with a deep groove belt and three-roller bearings is determined in the work. It was assumed that the belt is a rigid box filled with bulk material in extreme equilibrium. In this case, the friction forces act on the load from the belt and are directed along the movement of the belt, as well as components of the gravity of the load directed against the movement of the conveyor belt. In addition, when the belt moves with the load on the rollers, forces appear on the rollers due to the spread of the load. At the same time, active and passive pressure forces from the side of bulk load are associated with the compression and collapse of the sides of the belt when it passes through the roller bearings of the conveyor. With an increase in the angle of inclination of the side rollers, these thrust forces on the side rollers increase and, thereby, increase the friction forces of the load on the conveyor belt, which leads to an increase in the limiting angle of inclination of the belt conveyor. Based on the theory of the limit state of bulk load of a conveyor belt with three-roller bearings, equations of equilibrium of bulk load on an inclined conveyor belt are obtained. Based on the obtained equilibrium equation, analytical dependences of the maximum angle of inclination of the conveyor belt with three-roller bearings on the angle of inclination of the side rollers, the geometric dimensions of the tray, the properties of bulk load (the angle of internal friction and the angle of friction of the load on the conveyor belt) are found. From the analysis of these dependencies it follows that with an increase in the angle of inclination of the sides of the tray of the belt, the maximum angle of inclination of the conveyor increases and, with values greater than the minimum angles of inclination of the sides of the tray, takes a constant value equal to the angle of internal friction of the load. Moreover, the larger the width of the belt tray, the smaller the minimum angle of inclination of the sides of the tray. In addition, it was found that for ore at the same angles of inclination of the sides of the belt, the maximum angle of inclination of the conveyor is greater than for coal. Moreover, for coal, the minimum angle of inclination of the sides of the tray, at which the maximum angle of inclination of the conveyor is achieved, is less than for ore.
Key words:
conveyor with a deep groove belt, three-roller bearings, active and passive pressures of bulk load, limiting angle of inclination.
References
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About the authors
Kiriia Ruslan Visarionovich, Doctor of Technical Sciences (D. Sc), Senior Researcher, Senior Researcher in Department of Geomechanics of Mineral Opencast Mining Technology, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM, NASU), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .
Monastyrskyi Vitalii Fedorovych, Doctor of Technical Sciences (D. Sc), Senior Researcher, Senior Researcher in Department of Geomechanics of Mineral Opencast Mining Technology, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM, NASU), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .
Mishchenko Tamara Fedorovna, Master of Science, Senior Specialist in Department of Geomechanics of Mineral Opencast Mining Technology, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM, NASU), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .