This paper proposes a robot designed for automated routine or emergency disinfection in closed premises. The robot is related to the combined type robots. The robot consists of two functional parts: a universal mobile platform (lower part) and a disinfector (upper part), which, if necessary, can be freely moved by personnel on 4 wheels. In the initial position, the upper part of the disinfection robot is at the charging station. The mobile robot drives up to the disinfector, «hooks» it (puts it on itself) and moves along the planned route. The upper part of the disinfector will have its own independent intelligent system, separate from the mobile robot, which, when a person is recognized, stops liquid disinfection: in this case, the UV lamps turn through 180°, the cylindrical body closes and ventilation of the disinfected air from the enclosed space is turned on. In addition, liquid disinfection is only enabled when detecting beds, tables and chairs. With the spray nozzles located at a height of 400 mm, the disinfector can carry out a simultaneous combined treatment of rooms with equipment and furniture, including high-quality processing of the lower surfaces of tables, chairs and beds. To improve the functional characteristics of robotic disinfectors and to simplify their design, a multifunctional robotic disinfector has been proposed. It was found that the result is achieved by the fact that in a multifunctional disinfection robot containing a mobile cart with an autonomous positioning and navigation system, a disinfection platform with a disinfection liquid spraying system and UV lamps with reflectors installed on it, the disinfection platform will have its own autonomous control and power systems.

This study presents a combined numerical and experimental analysis of heat and mass transfer in mare’s milk during vacuum sublimation drying, which is a process essential for producing high-quality powdered products. The numerical model was developed using two-dimensional simulations and validated against experimental data obtained for varying sample thicknesses (3 mm, 5 mm, and 7 mm). Results demonstrated a strong agreement between the model and experimental temperature data, with a coefficient of determination ($R^2$) of 95% during the sublimation process. The findings revealed that thinner samples (3 mm) exhibited a 20% faster drying rate than thicker samples (7 mm), highlighting the critical role of sample thickness in sublimation dynamics. Additionally, the effects of heat flux distribution and mass loss due to sublimation were analyzed to understand the drying dynamics. This study highlights the importance of optimizing process parameters such as chamber pressure, shelf temperature, and sample thickness to enhance drying efficiency and reduce processing time. The findings provide valuable insights for scaling vacuum sublimation drying of mare’s milk for industrial applications.

The problem of optimizing oil production has always been one of the most pressing. The article is focused on the problem of improving the energy efficiency and optimizing the operating modes of this unit for oil production using rod pumping units (SHS). The article pays special attention to accounting for a decrease in the level of oil in the well, which affects the hydrostatic pressure and the load on the pump. The results of kinematic and kinetostatic analyzes of the transforming mechanism of the rod pump unit Drive are obtained. Based on the same results, the wattmetrogram was calculated. With its help, it allows not only to control energy consumption, but also to finetune the balance mechanisms and drive systems to increase the overall efficiency and identify its weaknesses. The decrease in the oil level reduces the overall load and, accordingly, we see that the amplitude of the wattmetrogram decreases. The oil dynamogram adds dynamic vibrations to the load, complicating the power profile. Together, the two factors make the reports more realistic, which is important for the correct selection and adjustment of counterweights, engine power, and optimization of the operation of the MSS. The results in the article are obtained taking into account the characteristics of the Electromotive and reducer used in the straight-line guide converter mechanism of a Class II quadruple drive of a specific SHS unbalanced drive.

The paper presents an analytical solution to the problem of optimal dynamic balancing of the six-link converting mechanism of the sucker-rod pumping unit. This problem is solved numerically using a computer model of dynamics, namely by selecting the value of the correction factor k. Here we will consider an analytical method for solving this problem, that is, we find the location of the counterweight on the third link of the six-link converting mechanism for balancing. To solve the problem, we use the principle of possible displacement and write an equation where we express the torque through the unknown parameter of the counterweight. Further, such a value of the unknown parameter is found, at which the minimum of the root-mean-square value of torque M is reached. From the condition of the minimum of the function, we obtain an equation for determining the location of the counterweight. Thus, we obtain an analytical solution to the problem of optimal dynamic balancing of the six-link converting mechanism of the sucker-rod pumping drive in various settings. According to the results, it was found that with the combined balancing method, the value of the maximum torque M and the value of the maximum power are reduced by 20 % than when the counterweight is placed on the third link of the converting mechanism, as well as when the value of the maximum torque is determined through the correction factor k. In practice, balancing is carried out empirically by comparing two peaks of torque M on the crank shaft per cycle of the mechanism movement. Solving the analytical problem, we determine the exact location of the counterweight.

In the present investigation, we conduct a comprehensive numericalsimulation to explore the complexities of heat and mass transfer phenomena duringthe vacuum drying process. Specifically, our focus is on the critical third phase ofvacuum drying, which incorporates the heating process. To accurately model thesephenomena, we employed a sophisticated three-dimensional heat equation, formu-lated in cylindrical coordinates, that captures the nuanced dynamics of the system.Furthermore, to ensure the reliability and validity of our model, a rigorous stabilityand accuracy analysis was performed on the finite difference equations utilized inthe simulation. The outcomes of this simulation were then meticulously visualized,offering intuitive insights into the heat and mass transfer mechanisms at play duringthe vacuum drying process. This approach not only enhances our understandingof the drying process but also contributes to the refinement of numerical modelingtechniques in the study of vacuum drying systems.