Improving the Design of the Grain Combine Harvester Cleaner

Operation technological process research in the cleaning system of the grain combine

“…Experimental data on the distribution of the airflow rate over the entire sieve area of existing modern GH showed that the airflow is distributed unevenly over the sieve area and has a wide range of variations. The results of other evidence obtained by researchers (Alferov, 1987;Kutzbach, 2001;Miu and Kutzbach, 2008;Steponavičius et al, 2008;Kotov and Chaus, 2010;Mudarisov and Badretdinov, 2013;Vasilevskij et al, 2013;Mirzazadeh et al, 2015;Baran et al, 2016;Špokas et al, 2016;Korn and Herlitzius, 2017;Sorochenko, 2017;Aldoshin and Lylin, 2018;Korn, 2020) indicates that the technological process of pneumo-sieve cleaning in the GH violates agrotechnical requirements (Špokas et al, 2016;Aldoshin and Lylin, 2018;Wang et al, 2018;. Due to the increase in productivity (Miu and Kutzbach, 2008;Aldoshin and Lylin, 2018; and throughput (Špokas et al, 2016;, problems arise in terms of quality of the purification system function-ing.…”

“…The results of other evidence obtained by researchers (Alferov, 1987;Kutzbach, 2001;Miu and Kutzbach, 2008;Steponavičius et al, 2008;Kotov and Chaus, 2010;Mudarisov and Badretdinov, 2013;Vasilevskij et al, 2013;Mirzazadeh et al, 2015;Baran et al, 2016;Špokas et al, 2016;Korn and Herlitzius, 2017;Sorochenko, 2017;Aldoshin and Lylin, 2018;Korn, 2020) indicates that the technological process of pneumo-sieve cleaning in the GH violates agrotechnical requirements (Špokas et al, 2016;Aldoshin and Lylin, 2018;Wang et al, 2018;. Due to the increase in productivity (Miu and Kutzbach, 2008;Aldoshin and Lylin, 2018; and throughput (Špokas et al, 2016;, problems arise in terms of quality of the purification system function-ing. This can be explained by the complexity of the simultaneous regulation of some design and technological parameters (fan speed and airflow rate, sieve gaps, and angular speed of the sieve drive crank) (Mirzazadeh et al, 2015;Wang et al, 2018) and depends on the harvested crop and on its physical and mechanical properties (geometric parameters, humidity, contamination) (Kutzbach and Quick, 1999;Kutzbach, 2001;Feiffer et al, 2005;Kelemen et al, 2005;Steponavičius et al, 2008;FAO Report, 2014;Špokas et al, 2016).…”

“…where K is the counting concentration of particles (the number of polydisperse solid particles of the grain heap per unit volume in the cleaning system), pcs/m 3 ; ρ is air density, kg/m 3 ; ρр -density of solid particles (grain), kg/m 3 ; dр -equivalent diameter of solid particles, m. To determine the type of flow in a combine harvester cleaning system during experimental studies of polydisperse heterogeneous flows, the volume Q and mass W consumption concentration can be determined as follows (Aldoshin and Lylin, 2018;Borodin and Zhangabay, 2019).…”

“…We can also add moisture and clogging of the grain heap, uneven distribution of the grain heap along the sieve mill's width, when harvesting on slopes. All these issues are due to the uneven distribution of the airflow and the width of the sieves due to the imperfection of existing designs of the cleaning system and the lack of a complete theoretical description and methods for substantiating design and technological parameters (Alferov, 1987;Kutzbach and Quick, 1999;Kutzbach, 2001;Rademacher, 2003;Feiffer et al, 2005;Kelemen et al, 2005;Miu and Kutzbach, 2008;Steponavičius et al, 2008;Voicu et al, 2008;Kotov and Chaus, 2010;Mudarisov and Badretdinov, 2013;Vasilevskij et al, 2013;FAO Report, 2014;Mirzazadeh et al, 2015;Baran et al, 2016;Špokas et al, 2016;Korn and Herlitzius, 2017;Sorochenko, 2017;Aldoshin and Lylin, 2018;Wang et al, 2018;Korn, 2020). Wang et al (2018) proposed a fatigue life analysis method and an optimization method for designing the cleaning system in order to improve the fatigue life of the cleaning system in combine harvesters.…”

“…Due to aerodynamic drag force, light particles are separated by the airflow, which is stronger than the force of gravity, due to the difference between the air speed and the the speed of the hovering particles. The grains (with more massive particles) are predominantly moved (separated from lighter particles) due to the action of gravity and inertia of the sieves, while the aerodynamic drag force has no significant action (Kutzbach and Quick, 1999;Kutzbach, 2001;Rademacher, 2003;Feiffer et al, 2005;Kelemen et al, 2005;Miu and Kutzbach, 2008;Steponavičius et al, 2008;Voicu et al, 2008;FAO Report, 2014;Mirzazadeh et al, 2015;Špokas et al, 2016;Korn and Herlitzius, 2017;Aldoshin and Lylin, 2018;Wang et al, 2018;Ospanov et al, 2019;Korn, 2020).…”