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Type of publication: research article
Type of publication (PDB): Straipsnis recenzuojamoje užsienio tarptautinės konferencijos medžiagoje / Article in peer-reviewed foreign international conference proceedings (P1d)
Field of Science: Mechanikos inžinerija / Mechanical Engineering (T009)
Author(s): Mieldažys, Algimantas;Jasinskas, Algirdas;Pocius, Antanas
Title: Экологический метод уплотнения силоса
Other Title: Ecological method of silage compaction
Is part of: Экология и сельскохозяйственная техника : материалы 6-й международной научно-практической конференции, 13-14 мая 2009 г. Санкт-Петербург, 2009, Т. 2
Extent: p. 279-285
Date: 2009
ISBN: 978-5-88890-059-8
Abstract: Surface unbalanced-throw vibrators, in which the exciting force is generated by turning the unbalanced mass, were studied and evaluated. Directional and non-directional vibrators were manufactured and tested. Using a directional grass mass pressing vibrator, the amplitude frequency characteristics of pressed grass mass were determined. Resonant frequency was found to depend essentially only on mass elastic properties; it varied from 7.0 Hz for goat'srue (Galega orientalis Lam) mass of greater elasticity up to 15 Hz for less elastic chopped maize mass. The amplitude of grass mass pressure during the resonance depends only on mechanical resistance of the pressed mass. The excitation power amplitude of goat's rue and its mixes during the resonance increased by 2.5 to 3 times but the efficiency of mass pressure dropped. The calculated coefficients of pressure enhancement were 5.5 to 5.8, when vibratory packers were used for grass mass pressing. The established pressure increase rate on the plant mass layer, when pressing it on the surface and from the container bottom, was from 3.0 to 7.5 when using directional vibrator, and 4.8 when using non-directional vibrator. After estimating the application of various tractors and vibratory grass mass packers for grass mass compaction it was found that in both cases the received efficiency rates of grass mass layer were similar. However, while using vibratory grass mass packers, these rates were even higher than using a wheeled tractor T-25A. The efficiency of mass compaction by a centrifugal directional vibrator was estimated in an experimental trial. The results indicated that during the vibratory packing the grass layer was compacted intensely for 5 to 10 min. Therefore, it is advisable to use the vibrators of this type to compact the 0.4 to 0.6 m thick grass layers. Operation of such a vibrator resulted in good density of chopped maize - after 20 min
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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