Research of the second pneumоseparating channel of the machine for preliminary grain cleaning MPO-30R «VELES»
doi: 10.30766/2072-9081.2018.67.6.128-133.
read allA.L. Glushkov, PhD in Engineering, senior researcher, e-mail: glandrey@yandex.ru,
Yu.V. Sychugov, DSc in Engineering, chief researcher,
V.A. Lazykin, PhD in Engineering, junior researcher
Federal Agricultural Research Center of the North-East named N.V.Rudnitsky, Kirov, Russian Federation, e-mail: priemnaya@fanc-sv.ru
In 2017 in the Kirov region the research of the second pneumоseparating channel of the machine MPO-30R «VELES» intended for preliminary cleaning of the grain heap of grain crops, cereals, legumes, maize, sorghum, sunflower, as well as for primary and secondary clearing of the grain of these crops from impurities in all agricultural zones of the country was carried out. This was done in order to study the impact of structural and technological parameters of this channel on the effect of cleaning the grain material from light impurities and determining the optimal values of the parameters studied. Experimental studies were carried out by conventional methods in three modes: preliminary, primary and secondary cleaning of grain. As a result of the research of the pneumоseparating channel of the mass-produced machine MPO-30R «VELES» it has been established that instal-lation of deflector rods in the lower part of the channel reduces average speeds of an air stream, increases unevenness of a field of speeds in the separation zone that leads to deterioration of cleaning quality of the grain material. The effect of cleaning the grain material from light impurities when installing deflector rods is reduced by 12.8% in the pre-cleaning mode, by 8.8% in the prima-ry cleaning mode and by 2.7% in the secondary cleaning mode. Research of the pneumоseparating channel with a modified bot-tom part proved that with increasing depth of the bottom of the channel from 0.13 to 0.16 m the effect of cleaning of the grain material from light impurities in the mode of preliminary cleaning increased by 8.0 %; of primary cleaning – by 3.8 % and of the secondary cleaning - by 7.4% with a relatively equal loss of high-grade grain to waste. Thus, taking into account the maximum values of the effect of cleaning the grain material from light impurities, the lower part of the pneumоseparating channel should be made straight, inclined at an angle of 13º to the vertical, without deflector rods. The depth of the lower part of the channel, taking into account the maximum capacity of the fan (2.14 m3/s) and the required average speed of the air flow in the pneumоseparating channel for the secondary cleaning of grain (8.0 m/s) should be 130 mm.
Keywords: grain, grain cleaning machine, pneumatic system, the effect of light impurities excretion, loss of high-grade grain in the waste
For citation:
Glushkov A.L., Sychugov Yu.V., Lazykin V.A. Research of the second pneumоseparating channel of the machine for preliminary grain cleaning MPO-30R «VELES» // Agrarnayа nauka Evro-Severo-Vostoka. 2018. Vol. 67. no. 6. pp. 128-133. doi: 10.30766/2072-9081.2018.67.6.128-133.
