Determining the regions of stability in the motion regimes and parameters of vibratory machines for different technological purposes

Dynamic Processes in Technological Technical Systems

Bernyk

Dedov

et al. 2021

Self Cite

The process of a vibration concrete mixer has been investigated. Well-coordinated equations of motion of the system «mixer -concrete mixture» and their solutions have established the regularities of changing the parameters of the mixer at different angles of inclination. An experimental design of vibration-gravitational mixing has been developed and manufactured, and studies of the working process of mixing efficiency have been carried out on it. Research carried out at three warehouses of concrete mixtures confirmed the assumptions accepted in the work, the assumption and the selected physical and mathematical model of the «Mixer -concrete mixture» system. The use of a vibration concrete mixer made it possible to reduce the duration of mixing by 2.5-3 times in comparison with conventional free mixing concrete mixers. Provides the preparation of hard concrete mixtures and improving the quality of concrete mixtures due to the destruction of defective aggregates and a more uniform distribution of the binder throughout the volume of the mixed mixture.An algorithm and method for calculating the main parameters of a vibration concrete mixer have been developed.

Section: Discussion Of Research Resultsmentioning

confidence: 99%

Research of technical systems of processes of mixing materials

Dynamic Processes in Technological Technical Systems

Bernyk

Dedov

et al. 2021

Self Cite

“…To perform mathematical operations in solving the problem, the software Wolfram Mathematica 11.3 (USA) was used. When calculating a cone crusher, the material is taken in the form of the Voigt model, it was successfully used in works [12,13] using a discrete model [14].…”

Section: Materials and Methods For The Study Of Energy Costsmentioning

confidence: 99%

Determiantion of energy characteristics of material destruction in the crushing chamber of the vibration crusher

Mishchuk²,

Mishchuk³

et al. 2021

EEJET

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The crushing equipment is characterized by a significant energy-consuming system during the crushing workflow. The current trend in the development of such processes puts forward requirements for the development of new or improvement of existing energy-saving equipment. The essence of the solution to the problem in this work is determined by using resonant modes, which are inherently the most effective. The practical implementation of the resonance mode has been achieved taking into account the conditions for the interaction of the resonant vibration crusher with the material at the stages of its destruction. The degree of the stress-strain state of the material is taken into account, which was a prerequisite for identifying the potential for the development of a vibration load. Composed equations of motion based on a substantiated discrete-continuous model of a vibration crusher and processing material. An approach is applied to determine the stepwise destruction of the material with the determination of the required degree of energy. This methodological approach made it possible to reveal the nature of the process of material destruction, where energy costs at the stages of crack formation, their development and final destruction are taken into account. It was revealed that the greatest energy consumption during the operation of crushers goes into the kinetic energy of the crushing plates and the potential energy of deformation of the springs. The proposed model is common for any design of a vibration machine and its operating modes. The stable resonance mode has made it possible to significantly reduce the energy consumption for the course of the technological process of material grinding. The results obtained are used to improve the calculation methods for vibratory jaw and cone crushers that implement the corresponding energy-saving stable zones of the working process.

“…Thus, studies using the above technique have established that for the processes of grinding [6,7], sorting [8], mixing [9], compaction [10,11], cavitation treatment [12][13][14], research of parameters, modes and reliability machines [15][16][17][18][19][20] there is a significant difference in the numerical values of the criteria of the studied class of technical systems. The main reason lies in the use of simplified models, the absence of modeling and consideration of the joint movement of the working bodies of the technical system and the processed medium or material.…”

Section: )mentioning

confidence: 99%

Assessment of the current state of parameters and operating modes of technological technical systems

Dynamic Processes in Technological Technical Systems

Dedov

Bernyk

et al. 2021

Self Cite

The classification features of technological technical systems, the further development of the theory of the working process are given. The classification features are determined. Only the classification features that determine their purpose and the nature of the work they perform are considered. An assessment of the design and technological parameters of the existing technical systems of industrial engineering has been carried out. New and improved evaluation criteria have been used. Reliable assessment and analysis made it possible to formulate more reasonably methods for solving the problem. Continuously improving, the technology leaves a reflection on the directions of development of technical system designs. On the basis of this, working hypotheses were formulated, the essence of which lies in modeling the medium and technical system as a single system with their own dynamic individuality. The system «technical system -medium» is represented by a complex hybrid (mixed) dynamic system, in which the technical system is a system with discrete parameters, and the medium is with distributed parameters, and this system is reduced to the calculated one in the form of a system with discrete parameters.