| As the main raw material for sugar production,sugarcane occupies an important position in the agricultural economy,and its planting area reaches more than 85% of the sugar crop planting area in China,so the demand for sugarcane seeds during the new planting period is huge.It has been found that leaf-stripped sugarcane is good for pest and disease prevention and the quality of the grown sugarcane is better,although the existing sugarcane stripping machine can effectively remove most of the cane leaves,it mainly targets sugarcane used for sugar extraction and does not take into account the damage of cane buds,it is not suitable for stripping of sugarcane seeds.To solve the problem of the high injury rate of buds by existing sugarcane leaf stripping machines,this thesis combined with the current status of research on the mechanization of sugarcane harvesting,the mechanical properties of cane leaves and buds of cane seeds were tested,and the damage law of cane leaves and buds was derived,two solutions of stripping machine for sugarcane seeds were designed,and the optimal solution was selected through comparison tests,and the kinematics and dynamics of the stripping process of sugarcane seeds in this solution were analyzed.A virtual simulation platform was used to conduct a single-factor test on the leaf stripping process,and a physical test platform was built to verify the simulation single-factor test results,according to the reasonable range of test parameters obtained,a quadratic rotational combination general design was conducted and the test parameters were optimized.Finally,a comparative planting test was conducted between the sugarcane seeds stripping under the optimal parameters and the cane seeds stripped by the conventional stripping machine to verify the feasibility of the sugarcane stripping machine design in this thesis.The main research findings were obtained as follows:(1)Affected by moisture content and development degree,the destructive strength of sugarcane buds and leaves at different heights is significantly different.The leaves at the end of the sugarcane have a high resistance to damage,but the buds have a low resistance to damage,and the resistance to damage of the buds is related to the bud scales on its surface.The tensile strength of leaves at the same height differed from one part to another,from the highest to the lowest being the leaf blade,the leaf sheath,the leaf ring,and the sheath base.The longitudinal tensile strength of the leaf blade and leaf sheath is much greater than the transverse tensile strength.(2)By analyzing the movement of sugarcane seeds in the stripping system,the main factors affecting the effect of sugarcane seeds stripping are the speed of the roller,the number of leaf crushing elements,the length of leaf crushing elements,etc.The physical prototype test verified the results of the single-factor simulation test,and the test factors affecting the impurity rate in the order of priority were the speed of the stripping roller,the speed of the crushing roller,the length of the crushing element,and the number of single rows of the crushing element;The main order of the test factors affecting the bud damage rate was the stripping roller speed,the speed of crushing roller,the number of single rows of crushing element and the length of the crushing element.(3)The regression model between test factors and test indexes is optimized,and the optimal working parameters of the sugarcane seed stripping machine are as follows: the speed of the crushing roller is 670r/min,the speed of the stripping roller is 400r/min,the length of the crushing element is 33 mm,and the number of single rows of the crushing element was 16,and the sugarcane seed stripping rate of 6.22% impurity rate and 4.46% bud damage rate after stripping under these parameters were obtained through the test.The germination rate of sugarcane seeds after stripping under optimal parameters was 81.25%,which was much higher than the 25% germination rate after stripping by the traditional stripping machine. |
PDF Full Text Request