Vertikaalse kruvikonveieri rakendatavuse analüüs granuleeritud väetise transportimiseks
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Kuupäev
2025
Kättesaadav alates
12.09.2025
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Eesti Maaülikool
Abstrakt
Täppispõllumajanduse areng nõuab autonoomsete masinate tõhusat väetisevarustust, mis
oleks energiatõhus ja töökindel. Senised uuringud on käsitlenud kruvikonveiereid, kuid
granuleeritud väetiste transpordi osas on andmeid napilt. Eesmärk oli uurida vertikaalse
statsionaarse kruvikonveieri sobivust granuleeritud väetise transpordiks autonoomses
teenindusjaamas. Laboratoorsed katsed viidi läbi väetise graanulite suurusjaotuse ja
mehaaniliste omaduste määramiseks. Töö käigus kasutati DEM-simulatsioone kahe
konveieritüübi – pöörleva kruvi ja pöörleva kesta – tootlikkuse võrdlemiseks. Analüüsiti
kaheksa erinevat kühvlilahendust. Simulatsioonid näitasid, et parim tootlikkus (41,23
g·s⁻¹) saavutati kahe pealt suletud nurga all oleva kühvliga konstruktsiooniga, mis ületas
traditsioonilist kruvikonveierit 28%. Staatiline kruvikonveier osutus sobivaks
lahenduseks kuivade mineraalväetiste jaoks. Uurimistöö loob aluse prototüübi
arendamiseks ja edasiseks katsetamiseks, sealhulgas niiskuse mõju ja sobivuse
uurimiseks orgaaniliste väetistega.
The development of precision agriculture requires efficient fertilizer supply systems for autonomous machines that are both energy-efficient and reliable. Previous studies have examined screw conveyors, but data on the transport of granulated fertilizers remain limited. The aim of this study was to investigate the suitability of a vertical static screw conveyor for transporting granulated fertilizer in an autonomous service station. Laboratory tests were conducted to determine the particle size distribution and mechanical properties of the fertilizer granules. DEM simulations were used to compare the productivity of two conveyor types: a rotating screw and a rotating casing. Eight different in-feed scoop designs were analyzed. Simulations showed that the best productivity (41.23 g·s⁻¹) was achieved with a design featuring two angled, top-closed scoops, outperforming the traditional screw conveyor by 28%. The static screw conveyor proved to be a suitable solution for transporting dry mineral fertilizers. This research lays the foundation for prototype development and further testing, including the investigation of moisture effects and compatibility with organic fertilizers.
The development of precision agriculture requires efficient fertilizer supply systems for autonomous machines that are both energy-efficient and reliable. Previous studies have examined screw conveyors, but data on the transport of granulated fertilizers remain limited. The aim of this study was to investigate the suitability of a vertical static screw conveyor for transporting granulated fertilizer in an autonomous service station. Laboratory tests were conducted to determine the particle size distribution and mechanical properties of the fertilizer granules. DEM simulations were used to compare the productivity of two conveyor types: a rotating screw and a rotating casing. Eight different in-feed scoop designs were analyzed. Simulations showed that the best productivity (41.23 g·s⁻¹) was achieved with a design featuring two angled, top-closed scoops, outperforming the traditional screw conveyor by 28%. The static screw conveyor proved to be a suitable solution for transporting dry mineral fertilizers. This research lays the foundation for prototype development and further testing, including the investigation of moisture effects and compatibility with organic fertilizers.
Kirjeldus
Magistritöö
Tootmistehnika õppekaval
Märksõnad
magistritööd, põllumajandusrobotid, väetamine, täppispõllumajandus, diskreetsete elementide meetod (DEM)