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dc.contributor.authorJasinskas, Algirdas-
dc.contributor.authorRutkauskas, Gvidas-
dc.contributor.authorDravininkas, A-
dc.contributor.authorMieldažys, Algimantas-
dc.description.abstractFlat surface inertia type vibrators in which the excitation force for thickening grass mass is received by turning the unbalanced mass were analyzed and evaluated. Directed and undirected action vibrators were manufactured and tested. The amplitude frequency characteristics of pressed grass mass were evaluated using a directed action grass mass pressing vibrator. It was concluded that resonant frequency depends essentially only on mass toughness qualities, and changes from 7.0 Hz when there is fodder goat's rue (Galega orientalis Lam) mass of greater toughness, up to 15 Hz when thickening chopped maize mass of lesser toughness. The amplitude of grass mass pressure during resonance depends only on the mechanical resistance of the pressed mass. The amplitude of excitation power of goat's rue and its mixes during resonance increased from 2.5 to 3 times but efficiency of mass pressure reduced. The calculated coefficients of pressure enhancement were equal to 5.5-5.8 when vibratory thickeners were used for pressing grass mass. The established repression of pressure on plant mass layer, while pressing mass on the surface and from the bottom of container, was 3.0-7.5 when using the directed action vibrator, and 4.8 when using the undirected action version. After evaluating the application of various tractors and vibratory grass mass thickeners for grass mass pressing it was found that in both cases the received efficiency rates of grass mass layer were similar. However, while using vibratory grass mass thickeners, these rates were even higher than using a wheeled tractor T-25A. The efficiency of mass thickening by centrifugal-directed action vibrator was evaluated by using an experimental trial. The results mdicated that during vibratory thickening the grass layer was thickened intensely for 5-10 min. Therefore, it is advisable to use vibrators of this type for thickening grass layers of 0.4-0.6 m thickness. This vibrator resulted in good density of chopped maize -en
dc.description.sponsorshipVytauto Didžiojo universitetas-
dc.description.sponsorshipŽemės ūkio akademija-
dc.format.extentp. 207-220-
dc.relation.ispartofAgronomy Research. , 2008, Vol.6, Special issue: Engineering of Agricultural Technologies-2008: International Scientific Conference, Kaunas, Lithuania, 17-20.09.2008-
dc.relation.isreferencedbyZoological Record-
dc.relation.isreferencedbyBiological Abstracts-
dc.relation.isreferencedbyBIOSIS Previews-
dc.relation.isreferencedbyCAB Abstracts-
dc.subjectGrass massen
dc.subjectVibratory thickenersen
dc.subject.classificationStraipsnis kitose duomenų bazėse / Article in other databases (S4)-
dc.subject.otherMechanikos inžinerija / Mechanical Engineering (T009)-
dc.titleVibratory thickening of grass massen
dc.typeresearch article-
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item.fulltextWith Fulltext-Žemės ūkio inžinerijos fakultetas-Žemės ūkio akademija-Žemės ūkio akademija-
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications
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