Kiriia R.V., Zhihula T.I., Zhelyazov T. Determining limiting angle of inclination of tubular belt conveyor
- Details
- Parent Category: Geo-Technical Mechanics, 2019
- Category: Geo-Technical Mechanics, 2019, № 149
Geoteh. meh., 2019, 149, 198-208
https://doi.org/10.15407/geotm2019.149.198
DETERMINING LIMITING ANGLE OF INCLINATIONOF TUBULAR BELT CONVEYOR
1Kiriia R.V., 1Zhihula T.I., 2Zhelyazov T.
1Institute of Geotechnical Mechanics named by N. Polyakov of NAS of Ukraine? 2Technical University, Sofia, Bulgaria
UDC 622.647.2:621.867.2
Language: Russian
Annotation.
Currently, one of the promising types of conveyor transport is a tubular conveyor. The main advantages of the tubular conveyor are the environmental friendliness of moving bulk load and ability to transport load along curved tracks without reloading nodes. At the same time, the widespread use of tubular belt conveyors is constrained by insufficient justification of the conveyor parameters. In literary sources, there is no analytical dependence of the limiting angle of inclination of the tubular belt conveyor relatively to the radius of the tubular belt, degree of the belt filling with weight, and physical and mechanical properties of the bulk load. In this work, limiting angle of inclination of the conveyor with a tubular belt is determined depending on the properties of the bulk load and degree of the belt filling with it. It was assumed that the belt was a rigid cylinder filled with bulk material in limit equilibrium. In this case, 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, which act on the rollers due to the spread of the load. At the same time, active and passive pressure forces from the bulk load act on the rollers and are associated with the belt compression and collapse during its passing through the roller bearings of the conveyor. With increase in the amount of the load in the belt of the tubular conveyor, the forces of the load spread acting on the rollers increase and, thereby, forces the load friction against the conveyor belt also increase, hence leading to an increase in the limiting angle of inclination of the belt conveyor. In the work, on the basis of the theory of the limiting equilibrium state of bulk load, equations were obtained for the load equilibrium on the belt of inclined tubular conveyor. Based on the obtained equilibrium equation, analytical dependences of the limiting angle of inclination of the belt conveyor with a tubular belt on the degree of the belt filling with the bulk load and properties of the bulk load (angle of internal friction and angle of the load friction against the conveyor belt) were determined. From the analysis of these dependencies it follows that maximum angle of inclination of the tubular belt conveyor depends on the angle of internal friction of the transported load, angle of the load friction against the conveyor belt and degree of the belt filling with load, and does not depend on the radius of the conveyor belt.
Keywords:
conveyor with deeply sagging belt, roller bearings, active and passive bulk load pressures, limit angle of inclination of the conveyor.
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. Poliakov of National Academy of Sciences of Ukraine (IGTM, NAS of Ukraine), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .
Zhyhula Tetiana Illivna, Candidate of Technical Sciences (Ph.D), Senior Researcher in Department of Geomechanics of Mineral Opencast Mining Technology, Institute of Geotechnical Mechanics named by N. Poliakov of National Academy of Sciences of Ukraine (IGTM, NAS of Ukraine), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .
Zhelyazov Todor,Associate professor Department of Mechanics of Faculty of Transport Technical University, Sofia, Bulgaria, This email address is being protected from spambots. You need JavaScript enabled to view it. , This email address is being protected from spambots. You need JavaScript enabled to view it.