FEATURES OF THE STARTING MODE OF THE VIBROCONTAINER WITH THE ELECTROMECHANICAL BALANCE DRIVE

Abstract

The article proposes an approach to determining the patterns of electricity consumption by the vibrating conveyor motors in its start-up mode, and evaluating the influence of the characteristics of the unbalance mechanism on the operation of the vibrating electric drive of the bulk product conveyor. It is determined that in the starting mode the rotation speed of the rotor of the asynchronous motor of the unbalance drive changes unevenly, this leads to uneven load of the motors. The obtained digital data of measuring parameters (currents and voltages of vibroconveyor motors) were recorded using the ADC board E-14-140 and software environment Lgraph2. Experimental studies suggest that the starting currents of the motors are affected not only by the unbalance parameters but also by their initial position, in particular at the counter initial position of the unbalance centers, the peak value of the motor current differences is almost twice as large as at the agreed position. This can be taken into account when choosing the power of the electric motors of the vibrating conveyor, and its overload capacity. Based on the frequency analysis of the curves of the difference of the operating currents of the motors, it is established that the components with a frequency of 16.6 Hz have the greatest amplitude, those that change with the speed of rotation. There is also a constant component due to the deviation of the parameters of the vibrator. Analysis of the curve of the difference of the Mittevi values of motor currents showed that in the spectral characteristic, in addition to the component with a frequency of about 50 Hz, the frequencies 33.4 Hz and 66.6 Hz are most pronounced, which means that antiphase oscillations with a frequency of about 16.6 Hz are superimposed on the fundamental harmonic frequency. due to the rotation of imbalances.