Особенности расчетов технологического оборудования, работающего в виброударном режиме нагружения
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Дата
2014
Автори
ORCID
DOI
Науковий ступінь
Рівень дисертації
Шифр та назва спеціальності
Рада захисту
Установа захисту
Науковий керівник
Члени комітету
Видавець
НТУ "ХПИ"
Анотація
Рассматривается вертикальная вибрационная мельница с жёстким эксцентриковым приводом. Масса помольной камеры соизмерима с массой технологической загрузки – измельчающие тела. Технологическая загрузка приводится к системе с дискретными параметрами: масса и жесткость. Нелинейность системы считается малой. Построена амплитудо–частотная характеристика движения загрузки внутри камеры. Определены усилия в приводе. На этом этапе нелинейность считается существенной и при решении задачи используются обобщенные функции.
Constructive scheme of dynamically balanced vertical vibration mill with hard eccentric drive is being considered. Specific feature of this type of mills is the ability to implement vibropercussion mode of loading in them. For vibration mills, the mass of grinding chamber is commensurable to the mass of internal technological load – tumbling bodies. In our case, technological load for vertical vibration mills is reduced to a system with discrete parameters – mass and stiffness. For the stiffness is assumed, that the characteristics of the reduced elastic recreational force of technological load is piecewise linear with a symmetric nonlinearity. Considering the nonlinearity as a small, the oscillations assumed to be occurring by harmonic law. In solving differential equations the Krylov–Bogoliubov method is being used. Amplitude-frequency characteristic of technological load is being constructed. Comparison with experiments provides sufficient precision about motion and speed. The criterion of the small nonlinearity of the given system gives considerable imprecision. Therefore, for dynamic calculations, more accurate method based on generalized functions is being suggested. To determine force, acting on the drive shaft, equation is being adduced. The graph of change of force in the drive is given.
Constructive scheme of dynamically balanced vertical vibration mill with hard eccentric drive is being considered. Specific feature of this type of mills is the ability to implement vibropercussion mode of loading in them. For vibration mills, the mass of grinding chamber is commensurable to the mass of internal technological load – tumbling bodies. In our case, technological load for vertical vibration mills is reduced to a system with discrete parameters – mass and stiffness. For the stiffness is assumed, that the characteristics of the reduced elastic recreational force of technological load is piecewise linear with a symmetric nonlinearity. Considering the nonlinearity as a small, the oscillations assumed to be occurring by harmonic law. In solving differential equations the Krylov–Bogoliubov method is being used. Amplitude-frequency characteristic of technological load is being constructed. Comparison with experiments provides sufficient precision about motion and speed. The criterion of the small nonlinearity of the given system gives considerable imprecision. Therefore, for dynamic calculations, more accurate method based on generalized functions is being suggested. To determine force, acting on the drive shaft, equation is being adduced. The graph of change of force in the drive is given.
Опис
Ключові слова
вибромельница, вертикальные колебания, технологическая загрузка, помольная камера, соотношение масс, эксцентриковый привод, vibration mill, vertical oscillations, technological load, grinding chamber, mass relation
Бібліографічний опис
Франчук В. П. Особенности расчетов технологического оборудования, работающего в виброударном режиме нагружения / В. П. Франчук, А. В. Анциферов // Вестник Нац. техн. ун-та "ХПИ" : сб. науч. тр. Темат. вып. : Химия, химическая технология и экология. – Харьков : НТУ "ХПИ". – 2014. – № 53 (1095). – С. 128-136.