Shevchenko H.O., Sushchenko 1O.I., Zozulia H.P. Oscillation modes of vibrating feeders with vibro-impact adaptive drive at the output of reflacted ore from chambers of wining blocks

Details
Parent Category: Geo-Technical Mechanics, 2019
Category: Geo-Technical Mechanics, 2019, № 148

Geoteh. meh. 2019, 148, 179 -190

https://doi.org/10.1051/e3sconf/201910900087

OSCILLATION MODES OF VIBRATING FEEDERS WITH VIBRO-IMPACT ADAPTIVE DRIVE AT THE OUTPUT OF REFLACTED ORE FROM CHAMBERS OF WININGBLOCKS

1Shevchenko H.O., 1Sushchenko O.I., 1Zozulia H.P.

1Institute of Geotechnical Mechanics named by N. Polyakov of National Academy of Sciences of Ukraine

UDC 622.349.5.002.68:622.8

Language: English

Abstract. The oscillation modes of vibrating feeders with vibro-impact adaptive drive are researched, which are intended for output and loading of reflacted ore from chambers of wining blocks at underground mining, or other bulk media from bunkers and so on, under complicated vibration conditions. The resonant polyfrequency oscillations of the impactor of the vibro-impact drive of feeders with such drive in vibro-impact modes are excited, which through the one-side elastic elements are transmitted to the feeder tray, and in the pillar of the reflacted ore in the chamber above the tray. With increasing load from the ore on the tray there is an increase in the intensity of the impactor vibration of the feeder vibro-impact drive with accelerations in hundreds m/s2. Such oscillations increase the depth of dissemination of vibrational effects in the pillar of reflacted ore above the tray, which increases the efficiency and productivity of vibration output. Depending on the feeders parameters in its oscillatory system, the various modes of vibro-impact oscillations are excited. On heavy vibrating feeders that are used to vibrate and load reflacted ores from wining blocks chambers driven by asynchronous motors, fixed on a stationary frame, bearings of heavy series are installed on the debalanced vibrators. Therefore, acceleration of the impactor of their vibro-impact drive in normal vibration output modes, it is possible to provide at the level of 200 m/s2. Under conditions of blockage, in the short term, the accelerator of an impactor can increase to 400-500 m/s2, depending on the setting. Given the possibility of achieving such a level of acceleration and growth, in this case, the spectral density and the width of the frequency spectrum of oscillations that is excited in the vibrational system of the feeder, this will ensure the high productivity and efficiency of the vibration output of the reflacted ore from the wining blocks chambers.The task of choosing the mode of variation of the feeder is to determine such parameters, which would ensure efficient vibration output of the rock mass and reliability of its operation.

Keywords: underground mining, vibrational feeders, bulk medium, vibro-impact adaptive drive, polyfrequency References

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About the authors:

Shevchenko Heorhii Oleksandrovych., Doctor of Technical Sciences (D. Sc.), Senior Researcher, Head of Laboratory of Vibratory Processing of Mineral Raw Materials, Institute of Geotechnical Mechanics named by N. Poljakov NAS of Ukraine (IGTM, NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Sushchenko Olexander Ivanovych., Design Engineer, Institute of Geotechnical Mechanics named by N. Poljakov NAS of Ukraine (IGTM, NAS of Ukraine), Dnipro, Ukraine.

Zozulia Halyna Petrivna., Engineer, Institute of Geotechnical Mechanics named by N. Polyakov NAS of Ukraine (IGTM, NAS of Ukraine), Dnipro, Ukraine.