The technique of optimization of the provisions of attachment points of hydraulic cylinders lifting mechanism, which takes into account, the fact that using standard cylinders with certain minimum and maximum length and stroke, when the distance from the axis of rotation of the boom to the upper hinge cylinder also changes the distance from the axis of rotation of the boom to the lower hinge cylinder. The tests described and tech-nology unit carried out in the areas of protective forest plantations, showed results that match the original requirements, which indicates the effectiveness of the work.

The article is devoted to laboratory studies of the soil aggregates. To date, remain relevant tasks for preparing for a fire-hazardous season and conducting fire fighting events. Creation, replacing mineralized bands One of the methods for conducting preventive work on the preservation of a forest massif on the development of large forest fires. Foresting the forest soil from the burning elements to the open layer of the soil, namely the creation of mineralized bands is mainly in front of the fire-hazardous season, during which strips and breaks are replaced. For laboratory research, an experimental installation was developed and manufactured. According to the study method, we defined the factors that changed the angle (α) and angle (β) for a spherical disk with semicircular cuts during the experiment. During the experiments, to verify the normality of the distribution of the characteristics responsible for the energy readings of the unit, a series of 30 experiments was performed using 30 experiments when setting the angles of the spherical disk with semicircular cuts α = 100, β = 100. Detailing the hypothesis about the normality of the distribution of the response function by the Criterion X2 -Pirson was carried out. According to the criterion of Kohrene, the homogeneity of the dispersions of the experiments was carried out. Based on the obtained experimental data, the dependences of the rotation of the spherical disk with semicircular cuts from the angle of attack and tilt, the dependence of the power from the angle of attack were constructed.

The article deals with the problem of creating machines and units for the prevention and suppression of forest ground fire. The purpose of the study is to increase the efficiency of the working process of the soil-throwing machine by substantiating the parameters of the energy-saving hydraulic drive of the rotor-thrower. The rational values of the pre-charging pressure and the working volume of the pneumohydraulic accumulator have been established, which ensure the reduction to a minimum of the number of operation of the safety valves when the rotor-thrower meets obstacles. The optimum charging pressure of the pneumohydraulic accumulator is 6 … 7 MPa, the working volume is 5 … 8 dm3, while the energy-saving hydraulic drive stores energy of about 15 … 17 kJ during the working cycle, pressure surges do not exceed 13.3 MPa, and the recovered energy at density of obstacles up to 200 pcs / km due to the reduction in the number of operation of safety valves can be about 3000 kJ per 1 km of strip laying. The productivity of the forest fire ground-throwing machine with a new energy- saving hydraulic drive increases by 16-22% while reducing energy consumption by 7-8%.

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