RESEARCH OF THE VIBRATION MACHINE OPERATING MODE FOR MOLDING HOLLOW CONCRETE BLOCKS
Journal Title: Вісник Кременчуцького національного університету імені Михайла Остроградського - Year 2017, Vol 1, Issue 104
Abstract
Purpose. To determine the laws of the form vibration motion acting on sealing the concrete mixture which is mixed prichastnymi oscillations, the mathematical model taking into account elastic, dissipative and inertial resistance force arising from the deformation of the sealing medium, to develop new design vibro working body for compaction of concrete mixes. Vibrating machine is used for molding concrete blocks of hard and ultrahard concrete mixtures. Existing vibratory machine, view vibratory presses, self-propelled vibroplates devices or table vibrators have a complex design and increased power consumption. So they can't be used for relatively small enterprises for the production of concrete products. Modern production requires the creation of highly effective vibrating machines for molding concrete blocks of hard and ultrahard concrete mixtures and having a simple design and low metal content. For efficient and reliable operation of the developed vibratory machines it is necessary to accurately choose their rational parameters, creating new effects in the form of policestate multidirectional effects on the moldable concrete mixture, and to justify the rational modes of vibration impact on the sealed environment. Methodology. In the study, the construction and principle of vibratory machine operation, which is provided with a form without a bottom, articulating with base plate on which is mounted a vibration exciter horizontal circular oscillations, have been described. As a result of the end and longitudinal walls of the mold for each cycle of oscillation have alternating amplitude-frequency vibration impact on sealing the concrete mixture. The equations of motion and the laws of linear and torsional vibrations of the vibration form allows to prove the basic parameters of vibrating machines and technological modes of vibration compaction of the hard and ultrahard concrete mixtures. Results. The obtained theoretical expressions allow to establish the laws of motion vibratory machine in the horizontal plane during the vibratory compaction of concrete mixes mixed with fluctuations. These dependencies sufficiently accurately describe the behavior of real dynamic systems "Vibration machine – compacted environment" in the molding of concrete blocks of hard and ultrahard concrete mixtures. They allow computer simulation of the laws of motion and the mode shapes of the sealing layer, to analyze them from the point of view of effective influence on the processed medium, to justify the type and form of vibration exposure, and to clarify the rational parameters of vibrating equipment. Originality. An original design of a vibrating machine in the form articulated with the vibration exciter circular oscillation has been proposed. Dependencies to determine the elastic, dissipative and inertial resistance forces the concrete environment in the form of discrete functions with slowly varying parameters, and the friction force between the base and concrete mix and a base and vibrating form presents harmonic Fourier series have been used. Practical value. Offered vibrating machine will be used on construction sites, for the production of concrete blocks of hard and ultrahard concrete mixtures. The use of the proposed vibration machines can reduce the energy intensity of the process of compaction of concrete mixes, to simplify machine design and improve performance.
Authors and Affiliations
А. Maslov, J. Batsaikhan, V. Lukyanenko
Keywords
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