Abstract
Various mechanical devices use vibrations in order to produce useful effects. Such an example can be found in vibrating sieves, used to separate certain particles out of a mix of small seeds. The particles move on the surface of the sieve under the action of the gravity, as well as of the effect induced by longitudinal vibrations. During the process, the mix stratifies, the heavy and small particles tending to accumulate in the lower layer. A simplified model of such a device was proposed and analyzed by the first author of the present paper in a previous publication. This model is now improved, by taking into account certain characteristics previously neglected. The free and the forced vibrations induced by an exciter with an eccentric rotating mass are studied. The optimal location of the exciter is determined, in order to maximize the separation, as well as to avoid secondary adverse effects. The study is illustrated by a numerical example based on the experimental device used in the previous publication. Calculated values of certain quantities are compared with those calculated on the simplified model, as well as with the measured ones. The results can be used by mechanical engineers involved in the design of vibrating sieves.
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Dragomir, M., Ovanisof, A., Petre, R.A. (2021). Improved Model of a Vibrating Sieve. In: Herisanu, N., Marinca, V. (eds) Acoustics and Vibration of Mechanical Structures—AVMS 2019. Springer Proceedings in Physics, vol 251. Springer, Cham. https://doi.org/10.1007/978-3-030-54136-1_40
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DOI: https://doi.org/10.1007/978-3-030-54136-1_40
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