Structural-parametric synthesis of hydro-mechanical drive of hoisting and lowering mechanism of package-forming machines

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This paper reports the new design of an experimental bench to study the effectiveness of the positional drive control system of shut-off fittings. For research, the operating modes of the disk flap and ball valve, based on proportional elements with feedback (4–20 mA), were programmatically formed and described. The mathematical model of control over shut-off devices has been analytically described on the example of a disk rotary valve with the possibility of further analysis of individual stages in accordance with the accepted assumptions. The operating control signal is justified with a serial asynchronous interface with an offset operating range of permissible values of –16.0 mA. Separate stages in the operation of the synthesized shut-off fittings based on accepted assumptions have been described. Measurements were performed for disc damper angles of 30°, 60°, 90° by variable value of the pressure control signal (1...4 bar) with sampling of measuring indicators for the control system in real time. The results obtained experimentally confirmed the adequacy of numerical modeling regarding the study of the disk rotary inter-flange valve, as well as preliminary assumptions in the mathematical model. Data were obtained to test the efficiency of controlled shut-off fittings (V-shaped ball valve, disc rotary inter-flange valve) at a sugar factory. The average angle of rotation for a ball is 17.61 degrees; the average value of the vapor temperature after cooling is 130.91 °C (subject to a given value of 130.0 °C). The deviation of the set value is 0.7 %. The average value for the angle of rotation of the disc damper at 43.0 degrees showed the largest deviation of technological parameters of 1.45 %.

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Synthesis of the control system for the positioning pneumatic drive of shut-off fittings according to the criteria of technological efficiency

Kryvoplias-Volodina¹,

Гавва

Сухенко

et al. 2022

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“…The results of the performed mathematical-statistical analysis are given regarding the technical and technological characteristics of the main functional modules. However, the applied methods of mathematical calculation of the overall efficiency of OEE equipment do not provide for a complete pattern of the analysis of the accuracy of dosing systems, in contrast to [15]. Numerical and experimental studies of different nozzle positions in the vacuum ejector system were carried out in the cited work.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Synthesis of precision dosing system for liquid products based on electropneumatic complexes

Гавва

Kryvoplias-Volodina²,

Blazhenko

et al. 2021

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This paper reports the construction of a mathematical model for the process of dosing liquid foods (non-carbonated drinking water). The model takes into consideration the differential equations of changes in the kinematic parameters of the liquid in a dosing device's channels and the corresponding accepted initial and boundary conditions of the process. The boundary conditions account for the influence of software-defined airlift dosing modes using the driver and the geometry of the product pipeline. The current's value measured in mA (with an accuracy of 0.001 mA) relative to the standard scale Imin is Imax=4...20 mA. Individual stages of the dosing process were analytically described, followed by the analysis of separate stages and accepted assumptions. The accuracy achieved when testing the experimental sample of the dispenser, with the repetition of the dose displacement process, ranged between 0.35 % and 0.8 %. The reported results are related to the established dosage weight of 50 ml when changing the initial level of liquid in the tank of the dosing feeder by 10 mm. An experimental bench has been proposed for investigating the functional mechatronic dosing module under the software-defined modes to form and discharge a dose of the product. The bench operates based on proportional feedback elements (4–20 mA) for step and sinusoidal pressure control laws in the dosing device. The control model with working dosing modes has been substantiated. The control models built are based on proportional elements and feedback. During the physical and mathematical modeling, the influence of individual parameters on the accuracy of the product dose formation was determined; ways to ensure the necessary distribution of compressed air pressure, subject to the specified productivity of the dosing feeder, were defined. The study results make it possible to improve the operation of precision dosing systems for liquid products based on electro-pneumatic complexes

“…There is a certain gap between the results of the simulation and the actual experiment because the shape of the particle is not taken into consideration, and the forces of the particles are based on existing theories that come from the material point. Paper [13] proposes a new approach to the mathematical modeling of the process involving the elements of a pneumatic pipeline, but it does not take into consideration the It is a relevant task to build scientifically-substantiated models for the calculation of pneumatic conveying installations considering the use of turbulent airflows, insufficiently studied, especially near the walls of a pipeline [2,4,6,7].…”

Section: A Mathematical and Physical Model Of The Critical Pneumatic mentioning

confidence: 99%

“…For a long time, this approach was justified, but in recent years, due to the introduction of proportional equipment, as well as integrated management systems, the performance of pneumatic product pipelines has increased significantly [9][10][11]. Given this, many mathematical models [12][13][14][15] of their operating regimes and control systems have become unacceptable for practical use.…”

Section: A Mathematical and Physical Model Of The Critical Pneumatic mentioning

confidence: 99%

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Practical aspects in modeling the air conveying modes of small–piece food products

Kryvoplias-Volodina¹,

Гавва²,

Yakymchuk³

et al. 2020

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ical models of pneumatic conveying of food products are formed on the basis of incremental material parameters of a pneumatic pipeline [1-3]. Additional technical challenges arise when calculating a modern pneumatic conveying pipeline for small-piece food products. It is necessary to introduce elements of monitoring drives, as well as the theory of their calculation to the generalized mathematical model of a pneumatic pipeline [2-5].