Comparative analysis of energy efficiency in the use of vibration-type process machines in resonant and superresonant operating modes

Abstract

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Creation and verification of spatial mathematical model of vibrating machine with two self-synchronizing unbalanced exciters

“…When calculating the dependence of the amplitude of acceleration on the frequency of rotation of the unbalances, the effect of changing the supply voltage frequency was taken into account. As a result of taking into account the law of frequency regulation, Kloss's formula takes the form [10]:…”

“…One of the creating energy-efficient vibrating machines principles is based on the use of working body resonant modes of vibration. At the same time, the required masses of unbalances and electric motor power are significantly reduced, which leads to an increase in the efficiency and service life of vibration exciters [3,10,11]. However, maintaining such an operation mode requires the use of automated systems for collecting, processing and analyzing information about the current state of the machine dynamic characteristics with the control actions simultaneous formation [3,[10][11][12].…”

“…At the same time, the required masses of unbalances and electric motor power are significantly reduced, which leads to an increase in the efficiency and service life of vibration exciters [3,10,11]. However, maintaining such an operation mode requires the use of automated systems for collecting, processing and analyzing information about the current state of the machine dynamic characteristics with the control actions simultaneous formation [3,[10][11][12]. The creation of rational systems for automatic control for vibration machines is based on a mathematical model of a machine, which should take into account the essential features of its dynamic properties (dynamic system with an engine interaction, self-synchronization various types stability areas, dynamic system to regulation response, etc.…”

Numerical Analysis of the Near-Resonant Vibrations of a Vibrating Technological Machine with Self-synchronizing Unbalance Vibration Exciters

“…This leads to the fact that in the operating mode, the electric motor is significantly underloaded, as a result of which energy consumption increases and the engine's service life decreases. In works [1,5], using the example of analyzing the power consumption of a technological vibration machine, the calculated values of the required motor power (consumptions associated with vibration impact on the material and friction in bearings) were obtained, which are much less (approximately half) of the installed power. The excess of the installed power (the power required to maintain the required technological mode) in relation to the required one is mainly due to the required power to pass through resonance and raise debalances when starting the machine.…”

“…One of the ways to increase the energy efficiency of vibration machines is the use of resonant modes of their working body oscillation, which, however, are usually unstable. In work [5], based on a comparative analysis of energy consumption for the implementation of the beyond-resonant and resonant modes of oscillations of the technological vibration machines' working body with an unbalance vibration exciter, it is shown that the required electrical power of the resonant machine is approximately three times less than that of the beyond-resonant machine. Thus, resonant vibration machines can use less powerful vibration exciters with lighter debalances, which provide a higher stability of their rotation at a significantly lower weight and cost.…”