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1
Content available Study of transport possibilities in the resonance zone of the new vibratory conveyor equipped with the single electro-vibrator
Żmuda Weronika, Czubak Piotr
Vibrations in Physical Systems
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2023
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Vol. 34, nr 1
art. no. 2023116
EN
The new vibratory conveyor, which is during patent pending [1], equipped with a single electro-vibrator intended for an accurate material dosing, was investigated in the hereby study. Possibilities of material transportations and dosing both in and out the circum-resonant zone were investigated. Dependencies of the transport velocity of the tested conveyor as functions of the excitation frequency for a certain range of load were determined. The high usefulness of the machine in the production lines requiring accurate material dosing was indicated. It was pointed out that the conveyor can transport the feed at a constant velocity, regardless of the feed mass, which is unique for the conveyors of inertial drive.
2
Content available Operation of a new single-vibrator conveyor on the falling slope of the second resonance
Żmuda Weronika, Czubak Piotr
Transport Problems
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2023
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T. 18, z. 4
223--232
EN
The paper presents the possibilities of operating an innovative single- vibrator-driven vibratory conveyor [1] in the vicinity of the second resonance zone. The characteristics of operation on both ascending and descending slopes are presented. The differences in the suspension deflection of the additional mass (which is a dynamic eliminator) during operation before and after the resonance were analyzed. We proposed working on the descending slope of the second resonance in order to increase the durability of the device. This is because the amplitude of the suspension deflection of the additional mass is limited and, due to its high stiffness, is exposed to material fatigue. This is an unusual method of operation for conveyors because it carries certain risks, such as the risk of the device entering resonance on its own or the problem of maintaining constant angular velocity of the unbalanced masses. This paper presents both analytical and simulation studies, which were then confirmed on a laboratory stand designed and built by the authors.
3
Content available Transport features of a new, self-attuned conveyor
Czubak Piotr, Surówka Witold
Transport Problems
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2022
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T. 17, z. 4
5--16
EN
The new vibratory conveyor destined for the accurate dosing of materials was investigated in the present work. The possibilities of the system to transport materials in the circum-resonant zone were tested analytically, as well as by simulations. The optimal work point of the system, which allowed a decrease in the amplitude of eliminator vibrations on its suspension due to operations on the resonance slope, was determined. Transport velocities depending on the excitation frequency and feed mass were determined by simulations. The results were verified on the conveyor of industrial dimensions designed and built in accordance with the patent application.
4
Content available Investigations of the transport possibilities of a new vibratory conveyor equipped with a single electrovibrator
Żmuda Weronika, Czubak Piotr
Transport Problems
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2022
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T. 17, z. 4
127--136
EN
In the present study, a new vibratory conveyor (patent pending) equipped with a single electro-vibrator intended for an accurate material dosage is investigated. The possibilities of material transportation in the circum-resonant zone were investigated analytically and by simulations [1]. Furthermore, the dependencies of the transport velocity of the tested conveyor as functions of the excitation frequency were determined. Favorable excitation frequencies at transports in the main and reversal directions were found, and the high usefulness of the machine in the production lines requiring accurate material dosage was indicated. A control strategy allowing for a sudden stop of the transported material was also proposed.
5
Content available Influence of the excitation frequency on operations of the vibratory conveyor allowing for a sudden stopping of the transport
Czubak Piotr, Surówka Witold
Vibrations in Physical Systems
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2020
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Vol. 31, nr 3
art. no. 2020303
EN
Transport possibilities of the new vibratory conveyor in dependence on the excitation frequency of inertial vibrators were investigated in the hereby paper. The comprehensive model of the machine together with the loose feed material was tested. Simulations allowed to determine the dependence of the transport velocity on the excitation frequency. The time needed for a sudden stopping of the transport was also investigated. The new controlling strategy, realised by means of the excitation frequency, was proposed for situations when there is a necessity of sudden stopping of the transport.
6
Content available remote Effectiveness of vibration reduction of a nonlinear dynamic vibration eliminator
Golec Z.
Vibrations in Physical Systems
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2012
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Vol. 25
153--158
EN
The paper presents the research aimed at effectiveness of elimination of the mechanical system vibration with the use of a nonlinear dynamic vibration eliminator. The considered object has been modeled as a discrete system with two degrees of freedom subjected to force excitation. Nonlinearity of elastic and dissipative properties of the protected object and the eliminator is defined by 3rd order polynomials. Solutions of the equations of motion have been obtained by simulation research with the use of MATLAB® software. Effectiveness of the vibration reduction has been assessed based on the function of the elimination effectiveness defined as the ratio of rms values of the vibration amplitudes of the protected object without the eliminator to the ones occurring with it, in the case of steady motion.
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