Technological improvement of the threshing frame's tobacco redrying line

To control the percentage of oversized tobacco leaves and ensure the large and medium,the effect of the thresher frame's tobacco redrying line on threshing quality was analyzed.The measure that the frame's openings size of first class thresher was made into different sizes to improve the leaf structure was put forward.After improvement,the aperture of the third,the 4th and the 5th rows of the frame was changed into 110 mm×(80±1) mm and the aperture of the first,the second,the 6th and the 7th rows of the frame was changed into 110 mm×(72±1) mm respectively.As a result,the percentage of large and medium tobacco leaves raised from 86.9% to 87.6%,the percentage of the 50 mm×50 mm scaled out tobacco leaves decreased from 26.2% to 21.6%.