Design And Experimental Research Of Wind Cleaning Device For Rape Extraetives

This paper in a large collection of consolidation based on the related literature, introduced threshing machine cleaning device research survey, and analyze the advantages and disadvantages of the existing cleaning device, and combining with the characteristics of China's rape harvester, for the rape harvest cleaning rate is low, high impurity rate problem, design a rape. Wind cleaning device. Of rape extractions wind cleaning cleaning device of main parts for the study on the structure and parameters of, the cyclone separation inside the cylinder of the gas phase flow field distribution of theoretical analysis, according to the results of the theoretical analysis, using MATLAB analysis software of the cyclone cylinder structure is optimized, using FLUENT software to different in material height of cyclone separation inside the cylinder of the gas phase flow field simulation analysis and of cyclone separator tube feeding highly optimized, get the better of feeding height. Finally, the optimization design of rape extractions of wind cleaning device used in Hunan Agricultural University Development of 5TY-100 type rape thresher was tested, the following conclusions are obtained.Through the physical characteristics of rape extractions were obtained in Brassica napus seeds accounted for 87.4%, pod shell proportion was 3.6%, light debris proportion was 8.9%; the suspension speed of rapeseed 6.52-7.46m/s, pod shell of the suspension velocity 2.53-3.23m/s and light debris suspension velocity 2.21-2.83m/s; rapeseed friction angle is 17.7 degrees. Design a rape. Wind cleaning device, the overall structure and working principle were designed and introduced, of cyclone separator, winnower conveying auger and gettering fan etc. key components of the parameters were determined. The distribution of the cyclone tube internal gas flow field were analyzed, the internal cyclone tube cutting to the general mathematical expression of velocity distribution and pressure field. According to the results of the theoretical analysis, in the cyclone separator of the Qing election results as the goal, the cyclone separating cylinder structure is optimized, the structural parameters of the cyclone separator is better by using MATLAB analysis software:feeding port width b= 100mm, cyclone separator tube radius R= 150mm. Using fluent for different feed height cyclone separation cylinder internal flow field simulation analysis; according to the distribution of flow field of cyclone separator tube feeding highly optimized for the rape extractions wind cleaning device, and the feeding height h shall be taken as the minimum value. Optimization design of rape extractions of wind cleaning device used in Hunan Agricultural University Development of 5TY-100 type Cole threshing machine was tested. Test results show that the rotational speed of the winnower for 445r/min, fan speed 1000r/ min, maturity is about 95% of rape Qing effect better selection; feeding quantity not more than 0.14kg/s the cleaning performance index can meet the requirements of the national standard.