Статті
Постійне посилання на розділhttps://dspace.nuft.edu.ua/handle/123456789/7372
Переглянути
2 результатів
Результати пошуку
Документ Simulation of hydrodynamic phenomena in valve feeders of adaptronic modules for dosing liquid products(2024) Gavva, Oleksandr; Kryvoplias-Volodina, Liudmyla; Dolomakin, Yuriy; Kulyk, Nataliya; Kokhan, AntonRational geometric and hydrodynamic parameters of valve feeders of adaptron modules for dosing liquid food products in automatic packaging machines are determined. Materials and methods. The study of hydrodynamic phenomena based on the simulation modeling of the feeder operation with liquid media, the physical and mechanical characteristics of which are close to Newtonian liquids, was conducted. A feeder with a conical valve and purified drinking water were used in the study. The feeder throughput was 500 cm3/s; the internal diameter of the drain nozzle was 20 mm. Results and discussion. To ensure the continuous flow, minimum overall dimensions of the feeder, and the possibility of regulation by changing the throughput of the feeder nozzle according to a given law, the angle at the base of the cone should be within 50–60°, and the length of the saddle base 20–25 mm. During the movement of the liquid in the valve feeder, three negative factors affecting the parallel laminar movement of the liquid were found: (a)reverse movement of the liquid when it comes into contact with the surface of the base of the valve cone; (b) turbulence cells at the entrance of the liquid into the valve channel, and (c) the tubular form of the liquid flow in the nozzle. These negative factors can be eliminated by using a ball-conical valve with a truncated top. To eliminate turbulence cells in the valve feeder, counter-current movement of liquid, and tubular flow of liquid in the nozzle, it was proposed to make the valve in the form of a conical-spherical shape with a cut-off cone top, and also to extend the inner surface of the seat to the inner surface of the measuring cylinder of the feeder. Under such conditions, a parallel flow of liquid is ensured, which contributes to the accuracy of dose formation and the duration of product storage. Conclusions. The design of the valve in the form of a conically spherical figure with a cut-off cone top according to the provided recommendations allows eliminating the centers of turbulence in the movement of liquid products in the valve feeder.Документ Експериментальні дослідження явища статичного гідравлічного гістерезиса в дозувальному мехатронному модулі(2021) Токарчук, Сергій Володимирович; Кривопляс-Володіна, Людмила Олександрівна; Валіулін, Геннадій РаіфовичЗавдання вдосконалення та розвитку машин та їх елементів є актуальним на будь-якому етапі їх життєвого циклу. У статті представлено дослідження параметрів роботи функціонального мехатронного модуля дозування в’язкої продукції, роботу якого засновано на основі ерліфтного обʼємного способу формування дози та використання електропневматичної системи автоматичного керування. Запропоноване виконання функціонального мехатронного модуля може застосовуватись для широкого асортименту в’язких харчових продуктів із забезпеченням високих показників якості процесу дозування. The task of improving and developing machines and their elements are relevant at any stage of their life cycle. Along with ensuring the value of the specified productivity, one of the main tasks that they are trying to solve when synthesizing the structural and structural schemes of machines is to minimize the costs of their production and operation. The cost of the equipment is proportional to its metal consumption and energy supply. In addition, taking into account the realities of today and the constant increase in the cost of energy carriers, one of the main components of operating costs is the consumption of electricity by equipment. The paper presents a study of the operating parameters of the functional mechatronics module for dosing viscous products. The operation of the module is based on the erlift volumetric method of dosing and the use of an electro-pneumatic automatic control system. This involves connecting a control device (multi-channel proportional pressure regulator ER Camozzi) to the object and introducing it into the feedback system. The task of the regulator is to control the actuator so that the inconsistency signal is reduced to zero in the presence of disturbances. A laboratory plant was developed and constructed to carry out a set of experimental studies. Based on the obtained results of experimental studies, characteristics of the process of processing a viscous food product in the proposed FMM system are obtained. Repeat ability was maintained when the dosage time interval was changed. This indicates that it is possible to dosing the same volume of product over a predetermined processing time.Proposed design of functional mechatronics module in comparison with “classicalˮ scheme of piston volume dosage has several advantages. The product jet supply is implemented for a wide rangeof viscous food products with ensuring high quality indicators of the dosing process and ease of installation and operation. Also,there is a decrease in material consumption and power consumptiondue to the absence of a pneumatic drive system and shutoff valves.