Research and development of resonant electromagnetic vibration screen for intensive vibration technologies

Abstract

In the article the development and use of controlled electromagnetic vibration drives used in the field of intensive vibration technologies are considered. Method is proposed for adjustment of amplitude and frequency of vibration of working element of vibrating screen, which improves efficiency of cutting, its dynamic and energy indices. By solving the differential equations of the system, its main characteristics, which can be used in the calculation and design of electromagnets, are determined. For experimental research, a vibrator was developed with a drive from a two-stroke electromagnetic exciter. Based on the results of the studies, it was established that the adjustment of the near-resonance mode when the load changes can always be provided by changing the frequency of the thyristor converter voltage pulses. Optimal combinations of amplitudes and oscillation frequencies of the developed vibration sieve are determined.

Modern technologies of calibration with measuring devices of electrical quantities

“…This solution helps to reduce the inaccuracy of measuring instruments to values that are specific to the used calibration instrument. In this way, it will be possible to avoid huge costs for upgrading the equipment while improving the university facilities [1][2][3][4][5][6][7][8].…”

“…This goal has been announced several times by the leadership of our country. To achieve this, in recent years, large financial resources have been allocated to all branches of production [1][2][3][4][5][6][7][8].…”

Analysis of metrological supply problems in electricity generation

“…In such circumstances, no one questions the significance of measuring devices in various production branches, i.e., the goal, duties, and function of metrological supply. The primary goal of metrological maintenance is to use the proper application of the measuring method, measurement tool, measurement process, and analysis of the measurement data through proper management to achieve the requisite accuracy and ensure good results [1][2][3][4][5][6][7][8].…”

The Impact of Vibrating Screen Startup Time on Vibration Amplitude and Energy Consumption in Transient State

“…Elastic support systems are employed to reduce dynamic effects on the foundation [14]. The vibrating motion of the sieve frame is driven by a drive system, typically consisting of an electric motor, flexible couplings, and an inertia vibrator or vibratory motors [15,16], occasionally electromagnetic ones [17]. In super resonant screens in which an inertial vibrator generates vibrations, the value of the vibration amplitude depends on the mass of elements (weights) attached to the vibrator shafts (or unbalanced masses in the vibration motor).…”