Özet:

We have investigated the influence of belt operation durability on the cost of transporting a ton of cargo. The study revealed that the longer the durability of a transporting installation, the lower the cost of transporting a cargo; the full service life of a tubular conveyor defines the service cycle of the belt. In turn, the service life of the belt is affected by the conveyor parameters, as well as the parameters of a transported cargo. We have identified significant parameters that can be altered by a designer when designing a tubular conveyor, specifically: the radius of the belt rolled into a tube and the belt motion speed. The radius and the belt motion speed can be proportionally changed relative to the specified conveyor productivity thereby altering the belt lifespan and the cost of transporting a cargo. We have established calculation dependences of the integrated economic indicator ‒ the cost of transporting a ton of cargo, which includes the expenses for salaries, electricity, depreciation, supplies, repairs and other expenses, the mass of displaced cargo over the entire period of service cycle of the conveyor. We have proposed a procedure for determining the optimal radius and the speed of belt motion for a designed tubular conveyor at which the average cost of transporting a ton of cargo over the entire period of conveyor operation would be minimal. Based on the dependences derived, we constructed charts of change in the average cost of transporting a cargo by conveyor depending on the radius and the speed of belt motion. Analysis of the charts allowed us to determine the optimal radius and belt speed motion for a designed conveyor at which the cost of cargo transportation is minimal. For the assigned operating conditions, given as an example, we have obtained the recommended parameters for the radius and the speed of belt motion, which grow with an increase in the conveyor productivity. Author Biographies Ivan Nazarenko, Kyiv National University of Construction and Architecture Povitroflotsky ave., 31, Kyiv, Ukraine, 03037 Doctor of Technical Sciences, Professor, Head of Department Department of Machinery and Equipment of Technological Processes

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