Inverkan av lutningar på massflöde och spridningsbild hos konstgödselspridare
This work is a part of a project initiated by the Swedish Riksdag, TYP 93. The goal of this work is to find the influence of sloping ground on massflow and spreader pattern of fertilizer spreaders. If there is any influence, a proposal of testing method is to be given. The change in drop point area when inclining a centrifugal broadcaster was calculated in a computer. Two fertilizer spreaders were used, Bogballe E1000 and Amazone ZA-F 603. The drop point area was not changing when inclining the Bogballe E1000. When Amazone ZA-F 603 was inclined sideways, the area changed with 3,5 %/degree inclination. Experiments done by the National Machinery Testing Institute (NMTI) showed that the massflow were changing when inclining both Bogballe E1000 and Amazone ZA-F 603 sideways. Further investigations are needed in this area. The change in massflow when inclining full-width spreaders is well-documented in the literature. The change in massflow when the studded roller feeder is inclined perpendicular to the roller axis is 0,8 %/degree inclination. Experiments done by the NMTI supports the literature. A certification is therefore possible. The certification should preferably be done when inclining the full-width spreader 10 degrees perpendicular to the roller axis. The influence of inclination on the spreader pattern from the centrifugal distributor was studied with a computer simulation model and by experiments. The greatest change in spreader pattern was found for broadcasters inclining on horizontal ground. But there is also a big change in spreader pattern when the broadcaster is driven on sloping ground. Sideways inclination causes bigger variation coefficient in the spreader pattern than inclining the spreader forward/backwards. This points towards a possible certification in this area. The change in spreader pattern from full-width spreaders mainly comes from the change in massflow when inclining the studded roller feeder. There are no arguments for having a certification here.
lutningar; massflöde; spridningsbild; konstgödselspridare
Rapport - Sveriges lantbruksuniversitet, Institutionen för lantbruksteknik
Publisher: Institutionen för lantbruksteknik, Sveriges lantbruksuniversitet
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