In this paper is studied a vibratory conveyor that is placed on an elastic base. Using the closed contours method it was determined the system that needs to be solved to obtain graphical representation for the generalized coordinates determining the position of the mechanical system elements. The shaking conveyor represents the chase hanged or supported to the fixed section. The chase commits oscillating motions hereupon the cargo which is in the chase, migrates concerning to the chase. The nature of the flow and its parameters are determined by the nature of the oscillating committed by the chase. Installation causes fluctuations fixed tray. Uniformly distributed load on the tray acts in each element of the mechanism. A proper dynamic model has been developed within MSC ADAMS and Maple 18. Simulation tests have been carried out and results are discussed to validate the proposed design solution.

In recent years, both natural and man-made disasters caused by human impact on the natural environment have increased. Countries suffer enormous economic and human losses from forest and industrial fires, water and air pollution, floods, earthquakes, seedlings and diseases. Therefore, the creation of monitoring and control systems for the state and dynamics of emergencies in the natural environment and at hazardous facilities are extremely important. Such monitoring and control systems can be both local (controlled by a separate object, such as a bridge or dam) and distributed (controlled by a certain territory and the natural and artificial objects located on it).

В статье рассмотрены вопросы эффективного использования мощности, вырабатываемой вертикальными ветряными турбинами (ВВТ), на основе выявления резервов мощности и разработки способа повышения коэффициента использования установленной мощности (КИУМ). Приведены расчетно-аналитические графики выработки мощности и энергии ВВТ в зависимости от различной скорости ветровых потоков. Целью работы является выявление резервов мощности ВВТ и определение эффективных способов их использования для повышения КИУМ. Собрана физическая модель ВВТ и сняты характеристики вырабатываемой мощности при частоте вращения от 2 до 22 м/с. Обозначены и выделены области неиспользуемой мощности ВВТ. Для повышения КИУМ рекомендовано применение вентильного генератора с широким диапазоном частоты вращения, который способен вырабатывать электроэнергию со стабильным напряжением при различных частотах вращения вала. Стабилизация выходного напряжения достигается вариантами переключения групп ветвей якорной обмотки вентильного генератора в зависимости от скорости ветрового потока. При этом качество электроэнергии не зависит от частоты вращения, так как выработанный переменный ток через диодные мосты преобразуется в постоянный. Результаты экспериментов подтвердили эффективность предложенных способов повышения КИУМ ВВТ.

This paper presents an effective approach to reducing noise and vibration levels in ultra-high-voltage (UHV) shunt reactors based on structural optimization and damping techniques. The main sources of vibration are associated with magnetostriction of electrical steel and electromagnetic forces in the magnetic system, which induce structural excitation of the reactor tank. A combined numerical and experimental methodology is employed, including finite element modeling (FEM) of the reactor tank and field measurements of vibration displacement and acoustic noise. In contrast to previous studies focused primarily on material properties, this work emphasizes the role of structural modifications in controlling vibration transmission. The proposed solutions include the use of nitrile butadiene rubber (NBR) damping elements, optimization of the magnetic system geometry, and reinforcement of the tank structure using vertical and horizontal stiffeners. The FEM analysis in the frequency range of 50–150 Hz shows that the maximum displacement amplitude reaches 16.2 μm at the tank bottom and 10.5 μm at the tank walls. Experimental results confirm a reduction in vibration levels to 13 μm and a sound power level of 88 dBA, which meets regulatory requirements. The proposed approach improves the vibroacoustic performance and operational reliability of UHV reactors and can be effectively applied in the design of modern high-voltage power equipment.

This study presents the results of research aimed at improving the efficiency of coal combustion in KWr-0.2 boilers. The improvement is achieved by optimizing the air supply to the stationary coal bed using vertically installed cylindrical air injectors equipped with side openings. The objective of the research is to increase the efficiency of low-power boilers by (1) enhancing the air supply to the coal bed, and (2) optimizing the number and arrangement of heat exchange pipelines within the combustion chamber. The research methodology included: numerical calculation of velocity and temperature fields above the fuel bed in the combustion chamber under specified post-combustion firing conditions; experimental analysis of the flue gas composition using a TESTO-300 gas analyzer; evaluation of residual energy content in coal and ash (obtained from both the collimator and integrated combustion systems) using a calorimetric bomb; and assessment of the elemental composition of ash structures via energy-dispersive X-ray spectroscopy. The results of the study demonstrated a 35% reduction in flue gas toxicity. Furthermore, the residual energy content in the ash resulting from the proposed method was found to be 40% lower than that observed with the conventional combustion method. The total content of chemical elements in the fuel combustion products decreased by 11–12%. The practical significance of the proposed coal combustion method is substantiated by its high economic efficiency, which enables a reduction in the required mass of coal burned by up to 40% per heating season.