Research in mineral fertiliser particle throwing distance from new centrifugal fertilizer spreader working tool

The produced mineral fertiliser spreaders have the working width and productivity that do not satisfy today’s requirements in high-technology agricultural production. It refers also to the distance the mineral fertiliser particle can reach. We have developed a new centrifugal fertilizer spreading working tool with an inclined axis of rotation. It allows for increased distance of mineral particles at centrifugal spreading. The aim of the present research is to determine the throwing distance of the mineral particle from the spreading disc inclined to the horizon. The analytical research has been performed using the methods of modelling, mechanics and mathematics, as well as methods of calculation and computer modelling. In the result of the theoretical research differential equations were obtained describing throwing of the mineral fertiliser particles from the blades and their further distance after leaving the working tool. In the result of calculations new graphical dependences have been obtained of the throwing time from the blades and the distance the particles of different mineral fertilisers can reach, in particular ammonium nitrate, depending on the frequency of the disc rotation, angles of inclination to the horizontal plane, radius of feeding the mineral fertiliser particles, coefficient of friction along the surface of the disc etc. The obtained new analytical expressions and the developed graphical dependences allowed for determination of the working tool parameters that ensure maximal distance of mineral fertiliser particles at centrifugal spreading. The performed experimental investigations proved the correctness of the theoretical research and showed increased throwing distance at the used improved parameters of the new centrifugal working tool.