Technical characteristics and agrotechnical indices of work of tillage machines

The study presents the results of analysis of the characteristics of modern tractors and tillage tools. The data obtained make it possible to assess the energy, economic, technical and shunting indices of the relevant aggregates, and can be used as a starting point in calculating the rational composition of the ma-chine and tractor fleet of agrarian enterprises. It is established that the dependencies and masses of trac-tors and the power of their engines on traction can be described with high accuracy by linear equations. On average, the mass of tracked tractors is 11 %, and the engine power is 27 % smaller than that of the cor-responding wheeled tractors. However, with a higher traction coefficient and low pressure on the soil, caterpillar tractors are less maneuverable, universal and, most importantly, less ergonomic, which hampers their wide application. With rational aggregation, such characteristics of the work of soil-cultivating units as working speed, specific fuel consumption, the utilization factor of the shift time do not actually depend on the traction class of the tractor. With an increase in the traction class of the tractor, the specific metal consumption of the implements being mounted with it increases. The difference is especially noticeable in the case of combined guns and «craters», for which a hypothetical transition from a class 1.4 tractor to a class 8 tractor led to an increase in the estimated specific material consumption by 3,7 and 3,4 times, respectively. The increase in productivity with the increase in the tractor class in most cases occurs with a delay. This allows us to conclude that the only advantage of introducing wide-angle aggregates is the reduction of the required number of operators. For the rest of the parameters, the machine with a wide-cut implement has no advantage over a group of machines with tools of identical total width.

machine-tractor unit, soil-cultivating tool, technical characteristics, test reports, analysis, specific fuel consumption, engine power, mass, productivity, tractor traction class, agrotechnical performance