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研究延用经验设计方法生产的LBQ2000型配料机三斗机架的结构和工作情况,运用ANSYS软件建立配料机三斗机架的三维计算模型并进行计算,得知在载荷作用下的最大变形量为1.358mm,远小于允许变形量40.744mm,同时最大应力为142.15MPa,位置在中间配料斗支架与两边配料斗支架相连的上横梁处,也远低于Q235A的屈服强度235MPa。为了进一步优化设计方案,提出如下改进措施:(1)将三斗机架的下横梁、下纵梁由原来的槽钢C14a改为C12;(2)8根立柱由原来的槽钢C12改为C10;(3)下部放置级配单元的托架上的横撑、竖撑由原来的槽钢C12改为C10,其余不变。改进后的三斗机架最大变形量1.392mm,最大应力值为132.21MPa,最大变形量几乎没有改变,但最大应力值减小了,而且改进后机架结构的整体柔度增加,减小了冲击力。改进后三斗机架少用钢材110kg,节约钢材7.24%。此改进方法已应用于产品生产中。
The structure and working conditions of the LBQ2000 batching machine three-bucket rack, which is produced by the experience design method, are studied. The three-dimensional calculation model of the batching rack three-bucket rack is established by ANSYS software, and the maximum deformation under load 1.358mm, far less than the allowable deformation of 40.744mm, while the maximum stress of 142.15MPa, the position of the middle hopper bracket with hopper bracket on both sides connected to the upper beam, but also much lower than the yield strength 235MPa Q235A. In order to further optimize the design, the following improvement measures are proposed: (1) Change the lower beam and the side sill of the three-bucket frame from the original channel C14a to C12; (2) Change the eight columns from the original channel C12 to C10; (3) the lower part of the horizontal unit placed bracket bracket, risers from the original channel C12 to C10, the rest unchanged. The maximum deformation of the improved three-bucket rack is 1.392mm, the maximum stress is 132.21MPa, the maximum deformation is almost unchanged, but the maximum stress is reduced, and the overall flexibility of the improved rack structure is increased and reduced impact. Improved three-bucket rack less steel 110kg, saving 7.24% of steel. This improved method has been applied to product production.