Fedoskina O.V., Franchuk V.P., Fedoskin V.О., Haddad J.S. Improving the efficiency of the impact crusher with inclined working chamber

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Parent Category: Geo-Technical Mechanics, 2022

Category: Geo-Technical Mechanics, 2022, Issue 161

Geoteh. meh. 2022, 161, 77-84

https://doi.org/10.15407/geotm2022.161.077

 

IMPROVING THE EFFICIENCY OF THE IMPACT CRUSHER WITH INCLINED WORKING CHAMBER

¹Fedoskina O.V.,¹Franchuk V.P., ¹Fedoskin V.О., ²Haddad J.

¹ National Technical University “Dnipro Polytechnic”, ²Al-Balqa Applied University

UDC 621.926.085

Language: English

Abstract. The production of fine-grained materials is associated with a high consumption of electricity and is mainly carried out in several stages of processing. The last stage - grinding - is the most expensive. This necessitates the creation of new economical machines and technologies. A large amount of research carried out at the Dnipro University of Technology made it possible for the first time to substantiate the possibility of using a vibrating jaw crusher with a vertically located chamber and a pendulum suspension of jaws as an independent grinding unit for the production of powder materials, as well as in production processes requiring special technological modes. The development of this direction is the creation of a vibration shock grinder with an inclined working chamber, which provides adjustment of the magnitude of the force effect on the material within a wide range. A vibrating grinder with an inclined working chamber includes the main elements: a passive jaw located on shock absorbers, an active jaw pivotally mounted in the body and connected to it by means of elastic links, and a two-shaft inertial vibration exciter. On the basis of the given design scheme for the movement of material to the discharge slot, the reduction in volume and throughput in each cross section of the working chamber is determined. When the boundary values are reached, the material pressing mode starts followed by jaw opening, reduce of chamber efficiency and vibrating shock grinder productivity. Having the smallest throughput of all sections of the chamber, the parallel zone determines the throughput of the grinder, as well as the performance of its feeder. The possibility of increasing the throughput by increasing the angle of inclination of the parallel zone and matching the speeds of material movement in different parts of the working chamber is considered. Based on the studies carried out, a chamber profile was developed in the form of a multifaceted working surface of the passive jaw and a stepped surface of the active jaw. Analytical expressions are given for calculating the parameters of the profile of the inclined working chamber of a vibration shock grinder.
Keywords: vibrating grinder, working chamber, throughput, jaw, oscillation amplitude.

 

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Fedoskina Olena, Candidate of Technikal Sciences (Ph.D.), Associate Professor in Department of the Fundamentals of Designing Machines and Mechanisms, National Technical University “Dnipro Polytechnic” (NTU "DP"), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Franchuk Vsevolod, Doctor of Technical Sciences, Professor, Professor of Department of Mining Machines and Engineering, National Technical University “Dnipro Polytechnic” (NTU "DP"), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Fedoskin Valerii, Candidate of Technikal Sciences (Ph.D.), Associate Professor in Department of Automobiles and Automotive Economy, National Technical University “Dnipro Polytechnic” (NTU "DP"), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Haddad Jamil, Faculty of Engineering Technology, Department of Mechanical Engineering, Al-Balqa Applied University, Amman, Jordan,  This email address is being protected from spambots. You need JavaScript enabled to view it.

 

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