Justification of parameters for novel rotary potato harvesting machine
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Kuupäev
2021
Kättesaadav alates
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
The authors have set an aim in relation to the development of a novel rotary potato
harvesting machine design and the substantiation of rational design and process parameters for the
clod crushing tools in the machine in order to improve its separation capacity. A novel design solution
has been suggested for the process of crushing the two adjacent potato rows with the vanes of the
vertical rotor and the expediency of using the methods of crushing clods in the two adjacent potato
rows in advance has been justified. Also, the more rational placement of the clod crushing tools in the
potato harvesting machine has been suggested. Following the completed research, the geometrical
parameters of the vertical rotor have been substantiated, in particular, its diameter dр = 0.65–1.0 m and
height hzag = 0.27 m. Additionally, the process parameters have been substantiated for some other tools
crushing the clods, in particular, the angle of inclination of the share’s working face, which has to be
equal to 10°, the elevator belt width bel = 1.05 m, the linear velocity of the belt Vp = 1.95 m s
–1
, the belt
agitation amplitude Аst = 18 mm. If the soil moisture content is equal to W = 18.4%, the soil separation
rate rises insignificantly, when the rotor diameter increases within the range of 0.65–1.0 m, moreover,
at Vm = 1.0 m s
–1
it varies within the range of 85.3–87.2%, at Vm = 1.5 m s
–1 – within the range of
87.0–92.7%, at Vm = 2.0 m s
–1 – within the range of 86.0–89.1%. The best performance is achieved at
a rotor rotation frequency of nр = 100 min–1
and a translational velocity of Vm = 1.5 m s
–1
, in which
case the soil separation rate S is equal to 93.5%. The tuber damage rate Pb decreases from 4.2% to
1.5%, as the rotor diameter dр increases from 0.65 m to 1.0 m, the translational velocity of the machine
Vm – from 0.8 to 2.2 m s
–1
at the rotor rotation frequency nр = 50–100 min–1.
Kirjeldus
Received: March 6th, 2021 ; Accepted: May 12th, 2021 ; Published: May 14th, 2021 ; Correspondence: jyri.olt@emu.ee
Märksõnad
clod-crushing, harvesting machine, loamy soil, potato, soil separation, vertical rotor, articles