Zhyhula T.I., Mishchenko T.F. Theoretical research of the influencing of the basic parameters of tubular belt conveyors on the magnitude of risk of tubular belt torsion
- Details
- Parent Category: Geo-Technical Mechanics, 2023
- Category: Geo-Technical Mechanics, 2023, Issue 165
Geoteh. meh. 2023, 165, 64-71
https://doi.org/10.15407/geotm2023.165.064
THEORETICAL RESEARCH OF THE INFLUENCING OF THE BASIC PARAMETERS OF TUBULAR BELT CONVEYORS ON THE MAGNITUDE OF RISK OF TUBULAR BELT TORSION
Zhyhula T.I., Mishchenko T.F.
M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine
UDC [622.2/.8.002.5:539.3]:005.2
Language: English
Abstract. A tubular belt conveyor (TBC) as a completely sealed transport installation is a promising solution for creating environmentally friendly transportation systems. TBC causes the least environmental damage compared to other types of conveyor transport. However, due to the more complex processes that take place during the operation of the TBC, namely the movement of a tubular belt with a load on roller supports, TBC failures and their consequences differ significantly from those of other conveyors. TBC failures can occur as a result of the tubular belt torsion, which leads to dusting and spillage. The risk of TBC belt torsion depends on its parameters: radius of the tubular belt, distance between roller supports, torsion stiffness of the belt cross-section, bulk density of the load, uneven loading of the belt, and coefficient of friction of the belt on the rollers. The torsion of the TBC belt section from the drive drum to the first roller support is considered. The cross-section of the belt on the roller support can rotate under the action of the torques applied to it, due to the uneven loading of the conveyor and the friction forces of the belt on the rollers. The condition for belt turning is obtained. It is shown that torsion is possible if the torque from uneven loading is greater than the torque from friction forces, or the coefficient of displacement of the centre of gravity of the load is greater than the coefficient of friction of the belt on the rollers. The risk of a tubular conveyor belt torsion in a roller support due to uneven loading is determined. The coefficient of displacement of the centre of gravity of the load and the coefficient of friction of the belt on the rollers are considered as random variables with normal probability distribution functions. The cases of loading the belt at 25 % and 75 % of its volume are considered. At a minimum belt load (25 %), the risk of scrolling is 0.01, and if the load increases by 3 times, the risk of belt torsion in the roller support is 2×10-5. The article considers the influence of the coefficient of friction of the belt on the rollers on the risk of its slippage. In cases of watering or icing of the TBC belt, the value of the coefficient of friction of the belt on the rollers can significantly decrease, and the risk of slippage can increase tenfold. The greatest risk of TBC belt torsion in the roller support occurs when the belt is minimally loaded and the coefficient of friction of the belt on the rollers decreases, which can occur due to watering or icing of the belt. To ensure the minimum risk of TBC belt scrolling on a roller support, it is necessary to ensure its maximum load and the maximum possible value of the coefficient of friction of the belt on the rollers.
Keywords: tubular belt conveyor, belt torsion, spillage.
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About the authors:
Zhyhula Tetiana Illivna, Candidate of Technical Sciences (Ph.D.), Senior Researcher in Department of Geomechanics of Mineral Opencast Mining Technology, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .
Mishchenko Tamara Fedorivna, Master of Science, Senior Specialist in Department of Geomechanics of Mineral Opencast Mining Technology M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .