Puhach A.M., Lysytsia M.I., Kalhankov Ye.V., Lysytsia N.M., Hrunskyi D.O. Rationale for the thickness of the rubber lining of belt conveyor drums

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Parent Category: Geo-Technical Mechanics, 2021

Category: Geo-Technical Mechanics, 2021, Issue 157

Geoteh. meh. 2021, 157, 152-162

https://doi.org/10.15407/geotm2021.157.152

 

RATIONALE FOR THE THICKNESS OF THE RUBBER LINING OF BELT CONVEYOR DRUMS

¹Puhach A.M., ²Lysytsia M.I., ¹Kalhankov Ye.V., ³Lysytsia N.M., ¹Hrunskyi D.O.

¹Dnipro State Agrarian and Economic University, ²Institute of Geotechnical Mechanics named by N. Poljakov of NAS of Ukraine, ³Oles Honchar Dnipro National University

UDC 695:66.23

Language: Ukrainian

Abstract. In the paper, the current state of development of transport equipment, namely belt conveyors, is presented. Today, belt conveyors are used in all sectors of the economy and transport thousands of tons of products; their length can reach 15 thousand meters. But along with the widespread use of the belt conveyors there is a problem of their reliability. According to researches, the most valuable and responsible parts such as drum and conveyor belt wear out rapidly and significantly increase the cost of transportation. In this paper, it is stated that the main cause of the drum and belt failure is vibration loads and dirt (transported material, moisture, etc.); besides, with taking into account the trend of increase of the conveyor length, vibration loads also increases, hence, accelerating the drum wear.
Therefore, many studies and works of scientists are focused on the problem of interaction between conveyor belt and the drum proposing a lot of solutions on how to increase life of the drum and belt, namely the lining of the drums with high-friction material. And only few of them are devoted to the problem of choosing the optimal thickness of the lining.As the world experience on conveyor construction shows, this problem is quite relevant for conveyor transport and, for a number of reasons, is quite difficult for obtaining an analytical solution. The reason is, first of all, the absence of adequate physical and mathematical models and in a variety of operating factors of different physical nature, especially in zone of the belt contact with the drum when it becomes wet or pieces of transported material occurred in it.
It is experimentally established that efficiency of conveyor largely depends on the degree and nature of contamination of the drum because contamination of the inner surface of the belt with particles of transported material (coal, sand, ore, etc.) can lead to a significant reduction in the coefficient of adhesion. When drums with rubber lining are used in the belt conveyors, tractive ability of the belt, as well as forces of friction, is also determined by the rate of deformation of the lining layer. It is experimentally established that value of the coefficient of adhesion is directly proportional to the thickness of the rubber lining and inversely proportional to the hardness of the rubber.
The rubber lining of the drum allows to: increase traction of the belt; reduce dynamic forces of the “belt-drive drum” system; reduce vibration stress in parts and assemblies of the conveyor (lining dampens both low-frequency and high-frequency oscillations); reduce belt wear; eliminate or at least significantly reduce the impact of contamination due to special corrugations; reduce a possibility of occurrence of self-oscillating process associated with either high belt speeds (about 20 m/s), or with the phenomenon of its slip: one of the main reasons is contamination in the contact zone.
Keywords: belt conveyor, drum, rubber lining, dissipation, dissipation coefficient, physical and mechanical properties, aging, adhesion coefficient.

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About the authors:

Puhach Andrii Mykolaiovych, Doctor of Science in Public Administration, Professor of the Department of Management, Public Administration and Administration, Dnipro State Agrarian and Economic University, Dnipro, Ukraine,  This email address is being protected from spambots. You need JavaScript enabled to view it.

Lysytsia Mykola Ivanovych, Candidate of Technical Sciences (Ph. D.), Senior Researcher, Senior Researcher in Department of Elastomeric Component Mechanics in Mining Machines, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Science of Ukraine, Dnipro, Ukraine,  This email address is being protected from spambots. You need JavaScript enabled to view it.

Kalhankov Yevhen Vasylovych, Master of Science, Senior Lecturer of Department “Reliability and repair of machines”, Dnipro State Agrarian and Economic University, Dnipro, Ukraine,  This email address is being protected from spambots. You need JavaScript enabled to view it.

Lysytsia Natalia Mykolaiivna, Master of Science, Assistant of computer technologies department, faculty of applied mathematics, Oles Honchar Dnipro National University, Dnipro, Ukraine,  This email address is being protected from spambots. You need JavaScript enabled to view it.

Hrunskyi Denys Oleksandrovych, Master of Science in Department “Reliability and Repair of Machinery”, Dnepropetrovsk State Agrarian and Economic University (DSAEU), Dnipro, Ukraine,  This email address is being protected from spambots. You need JavaScript enabled to view it.

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