There are many threats to the quality of human life in the environment of the modern world. Among them, one can single out the growing pollution of the environment and water resources, which leads to crop failures, hunger, and disease. Concomitantly, narrowly targeted measures often lead to an aggravation of the situation as a whole. For example, an attempt to solve the problem of yield quality deterioration by increasing the use of synthetic fertilizers leads to accelerated destruction of the fertile layer due to the irreversible loss of organic matter. It is proposed to use complex technology, including standard dewatering of sewage sludge at wastewater treatment plants, transportation, disinfection, and processing into a highly effective organic fertilizer. This paper deals with the problems of transportation of a viscous, epidemically dangerous, biologically aggressive substance for its further processing. To improve the quality of working conditions directly at treatment facilities to protect the environment, human health and counteract the emergence of epidemics, it is necessary to develop sealed systems for safe sludge transportation, maximally isolated from the environmentwith taking into account many variables, such as environmental temperature, intern biological processes, various tribometric, rheological and thermophysical properties. Upon the laboratory studies and bench tests, the main affected factors were identified. Fundamental design solutions for transporting substances with rheological characteristics of the sludge below 80% humidity level are proposed. Research has been carried out to decontaminate the substance during its transportation.

Development of modem power engineering follows the line of continuous increase in speed, coefficient of corrosive action and capacity of units. Gears and reducers are responsible parts of modem machinery and occupy an important place in the domestic power engineering construction. Durability and wear resistance of gears, apart from the design factors, also depends on the technological methods of treatment. The final stage of production of such wheels is the operation of gear grinding. In the process of gear grinding in a thin surface ball there are complex thermomechanical processes. As a result of short-time heating to high temperatures, structural transformations, burns, and in some cases even micro- and macro-thicknesses occur in such a surface bail. In addition, there are cases of making tooth wheels with adjacent defects grinding (for example, the appearance of the surface of the ball teeth of large tensioning forces), which reduces the life of the work, and in some cases causes a breakdown of the teeth in operating conditions. Development of effective measures to ensure the quality of the surface of the ball on the operation of grinding baggage in part depends on the possibility of predicting (or calculation) of temperatures and residual loads on the depth of the cemented teeth ball. The method of calculation of internal surplus Toads occurring during grinding of wheels with cemented steels is suggested. On the basis of the performed calculations and experiments the ways to improve the quality of production of working surfaces of gears, which are used in the wits of thermal and nuclear power plants are suggested and grounded.

The article is devoted to the problem of designing recycling in sustainable logistics systems in the field of processing wastewater treatment waste - municipal sewage sludge (MSS). The essence of the developed and proposed wastewater treatment project is based on its integration into the city's public utilities system, which will be a single basis for a closed-type logistics system. This approach to the design of sustainable logistics systems ensures the formation of a closed material flow in terms of "supply of raw materials - production - product distribution". This allows solving two problems: ensuring the creation of a closed logistics system and developing a new type of fertilizer. The solutions proposed in this project in the implementation of the MSS processing project are complex and allow implementing all areas of the sustainable development strategy. The design technology makes it possible to completely close the logistics cycle for the supply and processing of MSS into finished products in the form of organic fertilizers.

Анотація. Наведено послідовність розвитку комп'ютерних технології по створенню моделі деталі з використанням різноманітних підходів. Розглянуто параметричне проектування, пряме моделювання, (без дерева побудови та жорстких зв'язків між конструктивними елементами), варіаційне моделювання. Подібні рішення застосовувалися виключно для 2D-ескізу і побудови зв'язків «зверху вниз» для складальних вузлів, які не охоплювали тривимірного моделювання. Ситуація змінилась з появою синхронної технології, яка змогла поширити варіаційний підхід до моделювання на весь ланцюжок проектування виробу. Тобто синхронна технологія дозволяє змінювати функціонал прямого моделювання безпосередньо в параметричному середовищі. Розроблено алгоритм створення тривимірної моделі деталі в синхронному середовищі. Розглянуто технологію створення тривимірної моделі деталі типу "Корпус" в синхронному середовищі проектування сучасної САПР Solid Edge. Докладно наведено особливість створення та редагування тривимірної моделі деталі та її елементів з урахуванням особливостей технологічних процесів формоутворення різанням. Проведено порівняльний аналіз проектування у синхронному та параметричному середовищах з поясненням переваг та недоліків.

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