250UHB砂浆泵托架的有限元分析及结构改进

FINITE ELEMENT ANALYSIS OF MORTAR 250 UHB's BRACKET AND ITS STRUCTURE IMPROVEMENT

轴承在电机运转中是不可或缺的零件,轴承是标准件,可以按照设计要求直接选用,作为支承轴承及其它零件的托架的可靠性就显得尤为重要。针对某厂家出现多例托架上筋板断裂的情况,为设计出符合使用要求的托架,并节约设计时间、实现无纸化设计,根据预先设计好的托架二维尺寸图形,应用UG三维造型软件建立了250UHB砂浆泵托架的实体模型,并利用ANSYS有限元软件建立了其有限元网格模型,进而用ANSYS软件进行了静力分析,得到了该零件在工作状态下的应变和应力图。根据图纸建模的托架应力最大达到759.51MPa。此结果为该系列泵托架的结构改进提供了理论依据。随后选取两种可行性较强的方案对托架的结构进行了改进、分析,再经过对比得到改进效果较好的一种方案,最终达到设计要求。

Bearing is the indispensable part in the motor operation.Considering bearings as a standard part,it can be used in accordance with design requirements directly.The reliability of the supporting bearing and other parts of the bearing bracket is particularly important.For many bracket rib fracture,in order to meet the requirements of designed bearing bracket,such as design time reduction and paperless design,we establish its finite element mesh model under the two-dimensional size of pre-designed graphics,3D modeling software application UG mortar pump 250UHB established entity bearing bracket model and the ANSYS finite element software.Furthermore,we do the static analysis using ANSYS software and obtain the strain and stress diagram.The results provide a theoretical basis for improving the structure of the pump bracket.Finally,we analyze and improve the bracket based on two feasibility solution.We also do the improvement comparison on two feasibility solution which meets the design requirements.