It is known that a large share of the costs in perennial plantings of fruit and berry crops is associated with weed control. In the ranks of plants, chemical methods of weed control using herbicidal rods are used. In recent years, requirements for uniform distribution of herbicides on the treated surface have increased. The article analyzes the accuracy of the dosage of herbicides in the intercustal zone with a bar with a deviating section. The movement of the rod in the horizontal plane and the spill of liquid along its length is considered. The volume of the poured liquid, the area of the wetted surface, the amount of liquid per unit area are determined. It was established that the dose of application of herbicides over the area depends on the speed of the bar, the angle of its inclination to the direction of movement and the specific spill of the liquid along the length. It is shown that the more the rod deviates from its initial position and the closer it is to the row line, the greater the spout of the solution per unit area with respect to a given one. Dependencies are obtained that allow one to compare the doses of the application of the working solution of the herbicide on the treated surface before the bar meets the cultivated plant and when it is bypassed. The paper shows the data of calculation of the spill of the working fluid at a specific point of the rod. It was revealed that during the processing of the inter-brush strip in one pass with the half-line deviating section of the row line overlapping, the excess of the given outflow dose can reach 20 times. To process the inter-bush zones of perennial plantations, it is recommended to stack the herbicidal booms with short deflecting sections up to the row axis, providing compensation for inaccuracies in driving and planting trees in a row, and processing the row in two adjacent passes.

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The formation of protective films under the action of additives on friction surfaces is a rather complicated process. In the first approximation, when the materials of the additive present in the lubricant interact with the substrate material, physicochemical processes should occur, as a result of which the near-surface structure of the metal changes, etc. The stability of a structured lubrication system depends on the strength of the structural framework, the forces of interaction between its individual particles, the dispersion medium at the interface, and the number of particle contacts per unit volume. The efficiency of the lubrication with additives from graphite and graphene components is considered. It was found that if we know the binding energy of 1 mole of the film and its thickness, it is possible to determine the separation pressure. As a result of a theoretical analysis of the processes occurring during the interaction of graphene particles with the surface of the substrate or metal, the dependence of the multiplier function on the number of layers in the film was established. An equation is obtained that characterizes the total area of separation of film fragments over the entire surface of the part, taking into account the pressure in the nodes and mechanisms and the stochastic nature of this phenomenon. It has been determined that the functioning of a new assembly or mechanism, pressure fluctuations are minimal due to minimal wear and optimal part tolerances. In the interaction of metal - metal additives, the electrons of the metal atoms are able to form an electron cloud in the crystal lattice, partially extending beyond the lattice. This can lead to the appearance of a dipole moment, the negatively charged pole of which is outside the metal lattice, and the positively charged pole is inside it. Metal nanoparticles that make up additives to lubricants, in contrast to graphenes, are nanosized 3D objects with a full-fledged crystal lattice, and therefore have higher dipole moments, which reduces the adhesive properties of the film, but in general does not contradict the known theories of their formation at certain conditions.

Restoration of case parts of machines significantly reduces the cost of their repairing. The present paper proposes a method for restoring case parts using the repair size method. Depending on wear degree, the fitment holes are bored to three repair sizes. The prepared hole is inserted with a new bearing, the outer ring of which is covered with a polymeric coating of the appropriate thickness ensuring the fixity of the joint. As a result of theoretical studies, the model was obtained for the formation of a uniform polymer coating on the outer surface of a rotating cylindrical part. The facility and technological equipment were developed for applying a polymer coating of F-40C elastomer solution onto the outer surface of the rotating bearing. The facility includes screwing lathe 1K62, centering drift pin, bath and magnetic holder MV-V. The holder is designed for mounting a bath filled with polymer solution and its plunging movement when rolling bearings are immersed in polymer solution. The drift pin serves for centering and assembling bearings. The assembled drift pin is inserted into the chuck of the machine rotating the pin when applying polymer coating. The screwing lathe 1K62 is equipped with an INNOVERT frequency converter of H3400A05D5K type, which allows adjusting infinitely the spindle speed from 0 min-1. The paper presents the results of experimental studies on the F-40C elastomer shrinkage, the parameters of the mode of immersing parts into its solution, the dependence of the geometric parameters of the formed polymer coating on the components of application and adhesion modes for polymer coatings based on F-40C elastomer solutions of different viscosity. The acceptable thickness of the polymer coating of elastomer F-40C on the bearing 209, ensuring the non-failure operation of the restored seating with a cyclic radial load of 20 kN is 0.1 mm.

In the conditions of constant growth of prices for consumed energy and competition in the domestic market, rural commodity producers have a problem to reduce energy costs, since they make up a significant share in the cost of agricultural products. There are particularly high energy costs in the heat treatment of meat and dairy products and grain. To reduce energy costs for thermal purposes, you can use the secondary heat extraction and its use in a specific technological process. To calculate the parameters of a heat recuperator that reuses heat energy from heat-treated soybeans, an engineering calculation method is presented.