Influence of technical and operating properties of trucks on exploitation efficiency indicators

Abstract

The paper considers complex indicators, which assess the efficiency of operation of rolling stock trucks: productivity, cost of transportation, the coefficient of technical readiness. It was found that productivity is determined over a period of time there are hourly, daily, monthly, quarterly, annual productivity. The given formulas for definition of annual productivity consider a design, idle time of the car in repairs and maintenance. Based on the analysis, it is established that the annual productivity of trucks depends on the technical and operational properties, which include two groups of parameters: 1) related to the design of the car (average technical speed, load capacity); 2) not related to the design of the car (the number of working days per year, the time the car is in gear per day, the average length of driving with the load, the mileage utilization rate). The influence of car carrying capacity on productivity is investigated and it is proved that productivity increases with increase of loading capacity of the car and decreases with increase in distance of driving with cargo. Based on the dependence of the cost of transporting cargo for dump trucks and general-purpose trucks, it is shown that with increasing load capacity of the car, the cost decreases. The expediency of using low-tonnage cars over short distances is substantiated, as under such conditions the processes of loading and unloading, maneuvering of cars are simplified, as a result the costs for fuels and lubricants, loading and unloading works are reduced. The analysis of this dependence allowed to establish that on short distances use of low-tonnage cars is more favorable as conditions of loading and unloading are simplified, maneuvering of cars is simplified, and consequently expenses for fuel, loading and unloading works decrease. But this dependence was obtained for specific operating conditions when organizing the work of vehicles on opencast development. The possibility of full use of the car's load capacity is characterized by the load capacity utilization factor. It is established that between productivity and capacity utilization factor there is a direct proportional dependence, thus, design features of the car are characterized by three operational properties: speed of movement, passability and reliability of the car. The dependence of the productivity of some trucks and the cost of transportation of goods on the average technical speed. The coefficient of technical readiness is rearranged as a comprehensive indicator that characterizes such reliability properties as: reliability, maintainability and durability and takes into account downtime in all types of maintenance and repairs. found that there is a directly proportional relationship between productivity on a certain mileage and the cost of transportation the higher the productivity, the lower the cost of transportation and vice versa.

Keywords: truck, coefficient of technical readiness, productivity, simple, rolling stock, cost of transportation, technical and operational properties.