Energy-Saving Inertial Drive for Dual-Frequency Excitation of Vibrating Machines

Gursky, Kuzio, Krot, Zimroz

Abstract

The low energy efficiency and excessive power of electric motors of large-scale vibrating machines for processing bulk materials motivated a new design of the inertial drive. This drive consists of one motor and two coaxial unbalanced masses, whose rotational frequencies are related in the ratio 2:1. This approach allows for a generation of the excitation force with variable amplitude and frequency, which changes depending on the inertial characteristics and shaft rotation frequency and does not relate to the phase difference of the unbalanced masses. Because of this, the symmetry axis of the resulting vector hodograph can be changed.

The spectral composition of the exciting force up to 200 Hz contains higher harmonics, the energy share of which is 25.4% from the 2nd harmonic and 14.1% from the 3rd and higher harmonics that correspondingly improves bulk material treatment in comparison to single-frequency vibrators. The finite element model is used for checking the strength capacity of the most loaded units of a dual-frequency drive. Its use allows the realization of complex trajectories of motion that are more technologically efficient for variable parameters of the treated media and energy saving in sieving screens and other vibrating machines.

Keywords

Sieving screen; inertial vibrator; dual-frequency; spectrum; FEM simulation

Authors

Volodymyr Gursky1 , Igor Kuzio1, Pavlo Krot2,* and Radoslaw Zimroz2

1 Institute of Engineering Mechanics and Transport, Lviv Polytechnic National University, 79013 Lviv, Ukraine; This email address is being protected from spambots. You need JavaScript enabled to view it. (V.G.); This email address is being protected from spambots. You need JavaScript enabled to view it. (I.K.)

2 Faculty of Geoengineering, Mining and Geology, Wroclaw University of Science and Technology,

50-370 Wroclaw, Poland; This email address is being protected from spambots. You need JavaScript enabled to view it.

* Correspondence: This email address is being protected from spambots. You need JavaScript enabled to view it.

Acknowledgements

This activity has received partial funding from the European Institute of Innovation and Technology (EIT), a body of the European Union, under the Horizon 2020, the EU Framework Programme for Research and Innovation. This work is supported by EIT RawMaterials GmbH under Framework Partnership Agreements No. 18253 (OPMO. Operation monitoring of mineral crushing machinery).