The purpose of research. The main goal of the presented research consists in substantiation of inertial, stiffness and force (excitation) parameters of mechanical oscillatory system of three-mass vibratory conveyer with directed oscillations of the working element in order to provide the highly efficient (high-performance) resonant operation mode. Methodology. The technique of the research is based on fundamental concepts of engineering mechanics and theory of mechanical vibrations. In order to deduce the differential equations of motion of the mechanical oscillatory system of vibratory conveyer the Lagrange equations of the second order were used. The computation modelling of the system's motion caused by periodic excitation forces was carried out using MathCAD software with a help of Runge-Kutta method. Results. The existent structures of vibratory conveyers, as well as the fields and peculiarities of their implementation, are considered. The design of the three-mass vibratory conveyer with electromagnetic drive, directed oscillations of the working element, and resonant operation mode is proposed. The structural diagram of the conveyer's mechanical oscillatory system is developed and its dynamics is investigated. Scientific novelty. The mathematical model of motion of the mechanical oscillatory system of the proposed conveyer is formed. The numerical modelling of motion of the oscillating masses of the vibratory conveyer was carried out for different operation modes. The influence of the excitation parameters (the frequency and amplitude of the excitation force) on the characteristics of oscillations of the conveyer's working element was investigated. Practical value. The results of the carried out investigations can be used while designing and developing various vibratory equipment for conveying, separating and treating of different loose, bulky and piece-wise products.

Aim. Experimental investigation of grinding of external cylindrical surfaces of parts by thin abrasive wheels that are inclined to working surface. Methods. The investigation was carried out using the methods of cutting theory, the planning of experiments, statistical processing of experimental results. Results. The thin reinforced abrasive wheels (heightened circular speed gives for these wheels) are proposed to use to work up outer cylindrical surfaces of parts with covering heightened wear resistance and hardness or the details that were received of hard-to-machine materials. The influence of the cutting modes in the production process by thin abrasive wheels on the amount of effective power and the main component of the cutting force during the processing of external cylindrical surfaces of parts were experimentally determined. The empirical relations between production modes and power parameters of the production process were defined for oncoming directions and passing directions of circular speed for the machined cylindrical part and thin abrasive wheel. Scientific novelty. The ratio of production mode by thin inclined abrasive wheels on the effective cutter power and the main component of the cutting force during the processing of external cylindrical surfaces of parts, which were experimentally received, determines that accompanying processing by the increase of cutting depth and circular speed of rotation is accompanied to increase of effective cutter power and the main component of cutting force, and the increase of the longitudinal feed is accompanied to reduce them, but effective cutter power and the main component of cutting force increase during the growth of a feed and circular speed of the part for counter processing, however, these values reduce during the increase of cutting depth. The compatible, paired influence of several factors of processing modes on the power parameters of the process is important during the production process by the inclined thin abrasive wheel. The production process concerns processes with low energy consumption. The effective cutting power does not exceed 0.45 kW for all combinations of cutting modes. Low effective cutting power together with a small contact area of the abrasive wheel with the workpiece determine a small effect on the treated surface of the heating temperature in the processing area that ensures the preservation of the mechanical characteristics of the surface layer, which was obtained in the previous stages of manufacturing the part. Low energy consumption of the production process of cylindrical parts by inclined thin abrasive wheels determines the availability of its practical use. Practical significance. The production process of cylindrical workpiece surface of hard-to-process materials or with thick-layer wear-resistant coatings, which have significant previous surface irregularities, by inclined thin abrasive wheels was proposed to use on operations of rough round grinding or on rough transitions of turning operation. The studied machining process can be implemented on lathes that are equipped with the additional, replaceable high-speed electric drive of rotation of a thin abrasive wheel. The use of the method of processing the outer cylindrical surfaces by thin abrasive wheels provides: the use of low cost cutting tools, reduction of the main processing time due to the greater depths of cutting, increase productivity and reduce the cost of processing and versatility of the process, due to the ability to process the cylindrical surfaces of parts that are formed from a variety of materials with significantly different physical and mechanical properties.

Meet a claim is quite difficult in real production, even in specialized drilling manufacturers. Therefore, the development of reliable criteria for approaches to improving the technology of tricone drill bits is an urgent problem. This is great practical importance for domestic enterprise. The task is set to create rock-destroying insert in the basis of the developed construction. This allows you to increase the reliability of the connection between the cutter insert and the body of the cone. Favourable conditions should be provided for the rational distribution of contact stresses in conjugate surfaces "carbide cutter insert – bush – body of cone". Crucial part here is required rigidity of the carbide cutter insert. Advanced requirements are placed on them regardless of the design and dimension-type of tricone drill bits. They must have higher requirements such as: high reliability, durability of responsible elements of support and rock-destroying equipment, productivity, ability is stand destructive forces and torque are brought through a bit for influence on a face This increases the reliability of its connection with the body of the drill bit. Requirements apply to the design to provide favorable conditions for the rational distribution of contact stresses in conjugate surfaces "carbide cutter – bush – body of the bit cone". The obtained results of stress state modeling indicate that, as expected, with the same forces acting on the insert cutter from 42 kN to 57 kN, the most intense place on the cone will be the "collar" near the cutter. The intensity of stress will be up to 1050 MPa in this place for cones with serial rock-destroying equipment. At the same time, the intensity of stress will be up to 900 MPa for cones with developed destructive equipment, this is 14 % less.

Здійснено огляд останніх досліджень щодо безпечної експлуатації та раціональних сучасних технологій ремонту опорних вузлів надземних ділянок тривало експлуатованих магістральних газопроводів (МГ), які пролягають через водні перешкоди чи заболочені ділянки. Встановлено, що використання під час ремонту надземних переходів МГ, що пролягають через русла річок і заболочені ділянки, гусеничних трубоукладачів і великовантажних підіймальних кранів, значно погіршують екологію навколишнього середовища і збільшують сумарні матеріальні затрати за виконані роботи. Запропоновано технологію ремонту опорних вузлів надземних ділянок МГ без зупинки транспортування газу за допомогою мобільних підіймальних пристроїв. Використання розробленої конструкції мобільного підіймального пристрою і запропонованої методики проведення ремонту опорних вузлів надземних ділянок тривало експлуатованих МГ за допомогою переносних підіймальних пристроїв дає змогу виконувати ремонтні роботи без зупинки транспортування газу і зменшити шкідливий вплив на довкілля. Використовуючи метод скінченних елементів побудовано математичну модель з визначення напружено-деформованого стану елементів опорного вузла МГ і складових підіймального пристрою. Сформульовано рекомендації щодо оптимальних розмірів деталей мобільного підіймального пристрою і технологічних параметрів виконання ремонтно-відновлювальних робіт опорних вузлів надземних ділянок МГ. Отримані математична модель та графічні залежності показують, що збільшення відхилення положення трубопроводу від проєктного призводить до перерозподілу сумарних реакцій на опорних вузлах. Результати проведених досліджень дають змогу покращити ефективність регулювання взаємного положення елементів опорних вузлів ділянок МГ на надземних переходах.

The analysis of conditions of long operation of driving mechanisms of technological sites of firing and grinding at cement production is carried out in the work. Typical variants of mutual arrangement of crown pair elements in case of rectilinear axis of rotation of technological unit body and axial beating of gear ring, as well as variant of mutual arrangement of crown gear elements in case of curved axis of rotation of rotary unit body are considered. A technique for determining the total angle of skew of the teeth of the crown pair, taking into account the errors of manufacture and the relative position of the wheels of the open gear. On the basis of experimental data the dependences of the total skew angle of the teeth of the crown pair as a function of the rotation angle of the gear crown are constructed and the possible range of the total skew angle under different operating conditions of the considered large rotating units is determined. To assess the stress-strain state of the elements of the ring gear mounted on the furnace body, a solid model was created in the software environment Solid Works Simulation. As an example, the dependences of the change in the magnitude of the deformation of the teeth of the toothed crown in the plane of action of a uniformly distributed normal force are determined. Practical recommendations for improving the design of the crown gear pair are offered. Keywords: rotary kilns; mills; crown gear; toothed crown; the angle of skew of the teeth; finite element method