双向齿轮泵泵体裂纹分析及优化

Crack Analysis and Optimization of Bidirectional Gear Pump Casing

为探究双向齿轮泵泵体发生裂纹的原因,对泵体进行金相分析与拉伸试验,并使用有限元分析软件ANSYS Workbench对泵体进行强度分析,同时使用着色法对泵体裂纹进行探伤;得到泵体材料化学成分和抗拉强度值、确定了最大应力点和泵体裂纹起始位置。结果表明,泵体材料符合标准要求,泵体裂纹起始位置在出油口内壁。为避免泵体裂纹的产生,提出5种结构优化方案,采用有限元仿真软件ANSYS Workbench确定方圆过渡方案为最优方案,经过试验验证后泵体没有裂纹出现。试验证明了优化结构方案的可行性,通过有限元仿真可以提高液压元件理论计算精度,缩短研发周期,节约研发成本。

In order to explore the reasons for the cracks in the pump body of the bidirectional gear pump,metallographic analysis and tensile test were carried out on the pump body,and the finite element analysis software ANSYS Workbench was used to analyze the strength of the pump body,and the coloring method was used to detect the cracks of the pump body.The chemical composition and tensile strength of the pump body material were obtained,and the maximum stress point and the starting position of the pump body crack were determined.The results show that the material of the pump body meets the standard requirements,and the starting position of the pump body crack is on the inner wall of the oil outlet.In order to avoid the generation of cracks in the pump body,five structural optimization schemes are proposed,and the finite element simulation software ANSYS Workbench is used to determine the square-circle transition scheme as the optimal scheme.After experimental verification,no cracks appear in the pump body.The experiment proves the feasibility of the optimized structure scheme.The finite element simulation can improve the theoretical calculation accuracy of hydraulic components,shorten the research and development cycle,and save the research and development cost.