Research into excitation of dual frequency vibrational-rotational vibrations of screen duct by ball-type auto-balancer

Authors

DOI:

https://doi.org/10.15587/1729-4061.2016.72052

Keywords:

vibration exciter, dual frequency vibrations, 3D simulation, unbalanced mass, resonance vibrator, auto-balancer, screen

Abstract

The 3D model of the screen stand with the vibrational-rotational duct motion was developed. The ball-type auto-balancer, which makes it possible to create the two-frequency vibrations, is used as the vibration exciter. The main parameters, which influence the stability of the dual frequency vibrations, were defined after adjusting and testing the model. It was established that the ranges of the dual frequency vibrations are relatively large, which makes it possible to change the characteristics of vibrations with a change in the parameters from these ranges.

An increase in the summary mass of the spheres increases the amplitude of slow vibrations of the duct masses in direct proportion. This increases in direct proportion the vibration energy directed toward the execution of the main technical process.

An increase in the unbalanced mass on the auto-balancer case increases the amplitude of rapid vibrations of the duct masses center in direct proportion.

It was established that an increase in the rotation frequency of the rotor increases the amplitude of the rapid vibration speeds of the duct in direct proportion. This increases the vibration energy directed toward the duct self-cleaning and the change through the vibrations of the mechanical properties of the workable material in proportion to the square of rotation frequency of the rotor.

The simulation showed that the auto-balancer works as two separate vibration exciters. In the first one, the spheres rotate practically evenly with the resonance frequency of the duct vibrations, at this, independent of its loads, the spheres automatically adjust to this frequency, by which they excite the slow resonance duct vibrations (12 Hz) with a large amplitude. In the second one, the mass on the AB case excites the rapid duct vibrations with (any) existing non-resonant rotation frequency of the rotor.

Author Biographies

Gennadiy Filimonikhin, Kirovograd National Technical University 8 University ave., Kirovograd, Ukraine, 25006

Doctor of Engineering Sciences, Professor

Department of Machine Parts and Applied Mechanics

Volodymyr Yatsun, Kirovograd National Technical University Universitetskyi ave., 8, Kirovograd, Ukraine, 25006

PhD, Associate professor

Department of Road Cars and Building

Kostyantyn Dumenko, Kirovograd National Technical University Universitetskyi ave., 8, Kirovograd, Ukraine, 25006

Doctor of Engineering Sciences, Professor

Department of Operation and Repair of Machines

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Published

2016-06-30

How to Cite

Filimonikhin, G., Yatsun, V., & Dumenko, K. (2016). Research into excitation of dual frequency vibrational-rotational vibrations of screen duct by ball-type auto-balancer. Eastern-European Journal of Enterprise Technologies, 3(7(81), 47–52. https://doi.org/10.15587/1729-4061.2016.72052

Issue

Section

Applied mechanics