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Existing united harvest machine is more suitable for operating in plain area of big, medium-sized machine, there's an urgent need for mountainous and hilly area of micro computer, but the existing miniature of the combine harvester is common cleaning system cleaning impurity is too large, the loss is too high, make the product into the market has a real difficult. Cyclone separating cleaning system has the advantages of stable structure simple, the cleaning quality, adapted to mini combine harvester, but lack of configuration parameters on the micro combine harvester. This study cleaning tube diameter, suction duct diameter, the grain diameter of the mouth, suction tube length, shell height, winnow wheel rotation speed, suction fan speed seven factors as the test parameters, the single factor test and regression test, test found that cleaning system to winnow wheel speed and suction fan speed requirements are relatively high, especially improve the fan's rotational speed, to ensure that the required cleaning wind speed, and ensure the cleaning performance. At the same time established the cleaning system cleaning performance index - grain QingJieLv and cleaning loss rate, the mathematical model determines the optimum structure and its motion parameters, and optimize the design and calculation, analyzes the structure and motion parameters on cleaning performance, on miniature combine harvester for the cleaning system configuration provides the design basis.
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