# Improving Energy Efficiency of Grain Cleaning Technology
###### Abstract
To solve the problem, a mechatronic module \"linear electric drive--drum sieve\" was suggested, which led to a significant increase in power. In their research, the authors of [11] proved that the pulse operating mode of the MVR-2 (SU-0.1) machine increases the performance by 20% when using a linear electric drive. Thus, mathematical modelling has been widely used in research of the technological processes of post-harvest grain treatment. Different authors consider ways to improve the designs of working machines of grain cleaning production lines. Energy- and resource-saving grain cleaning machines for separation of the light impurities of seeds [12] have been developed. The quality of grain cleaning depends on the number of fan revolutions. According to theoretical and experimental studies, the separation of about 85% of light impurities of grain has been achieved. A grain cleaning machine for fractional technology of fodder grain crushing [13] has been developed and theoretically investigated. Research on the pneumatic system has been carried out by mathematical modelling, which allows theoretical testing of its operability. For small farms, a grain cleaning machine [14] was developed and tested, which had low specific metal consumption and lower energy consumption. The intervals of parameters and operating modes of the grain cleaning machine were selected. Vibration machines are considered to be the basis of future technologies [15]. The authors obtained a mathematical model of a cleaning machine with a vertical rotation axis, developed a calculation method, and calculated the structural parameters of an automatic vibrator. The designs and operating parameters of the screening module of the grain cleaning machine [16] have been studied with a view to investigating the improvement of the sieves' cleaning efficiency by substantiating kinematic operating modes. Recently, much attention has been paid to the technological process of the diameter fan in a rotating coordinate system [17, 18, 19]. The authors substantiated the parameters of its operation based on the mathematical model of the fan's technological process. The authors of [20, 21, 22] suggest a separator with small power capacity of pneumatic separation. Improved disc separators are suggested by [23] for better grain cleaning. It is recommendedto use the specific electricity consumption method [24; 25] in calculating the power of the electric motor. As can be seen from previous research that mathematical modelling also identifies directions for further improvement of machines for cleaning grain with air flow [26]. Mathematical modelling of grain separation in a grain cleaning machine [27; 28] and the study of its sieve frame operation [29] confirm the adequacy of mathematical modelling. The evaluation of mathematical models in separating light impurities in sediment chambers of grain cleaning machines has been carried out in parallel with experimental studies [30]. The generalized mathematical model of operating of screening machines is presented in [31]. Studies of several multifactorial experiment designs with a minimum number of transition levels of factors [32; 33] have been conducted. The authors recommend the wide use of active experiments in the research of technological processes, devices, and systems, where possible. Environmental issues such as dust emission into the environment during grain cleaning [34; 35] and the emission of gases and heat during grain drying [36] are also relevant issues of our time. The developed methodology for determining the parameters of the air-sieve scalper separator air flow [37] makes it possible to make adjustments while determining rational and optimal parameters and operating modes of the pneumatic system. This increases the efficiency of the air-sieve separator and reduces its energy consumption.