This paper contains the results of the analysis of motions of a vibration machine actuator and the response of medium with material being processed to the actuator motions. The actuator and the medium in combination are simulated as a discrete-continuous system. Discussed in this paper are the basic parameters of such a system, as well as the modes of resonance, under-resonance, and over-resonance vibrations of the vibration machine actuator. In the paper, some variants of the vibration machine design, which are characterized by enhanced energy efficiency in generating vibrations, are proposed.
Słowa kluczowe: vibration machine, energy efficiency, resonance vibrations.
Artykuł zawiera wyniki analizy ruchów siłownika maszyny wibracyjnej i reakcji ośrodka z materiałem przetwarzającym ruchy elementu. Połączenie siłownika oraz medium symulowane jest jako dyskretny system ciągły. W artykule omówiono podstawowe parametry układu a także stany rezonansowe, pod-rezonansowe oraz nad-rezonansowe drgań siłownika maszyny. Zaproponowano także szczególne warianty konstrukcji maszyny, które charakteryzują się zwiększoną efektywnością energetyczną w generowaniu drgań.
Keywords: maszyny wibrujące, efektywność energetyczna, wibracje rezonansowe.
Vibration machines are used in processes for crushing, sorting, mixing, and compaction of construction materials, as well as in other processes that are characteristic for the building-and-construction industry. Vibration machines are designed, for the most part, for operation in the mode of over-resonance vibrations of the vibration machine actuator. In the design of such vibration machines, predominantly inertial forces are considered. Notwithstanding the fact that vibration machines are rated for steady-state operation, that is, for operation in conditions without transient processes, the energy efficiency of such vibration machines is low. Consequently, such vibration machines are characterized by that their reliability is reduced, materials consumption is high, and running time required for sufficient processing of materials is increased. Additionally, to the operation of vibration machines in the mode of normal harmonic vibrations of the vibration machine actuator, it is possible to operate vibration machines in modes of resonance [...]
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