基于ANSYS WORKBENCH长轴液下泵轴的动力学特性分析

Analysis of Dynamic Characteristics of Long Shaft Submerged Pump Shaft Based on ANSYS Workbench

为了校核长轴液下泵轴的强度、挠度及临界转速等力学特性,基于ANSYS WORKBENCH软件的Static Structural与Modal对液下泵轴进行了分析。采用PRO/E建立液下泵三维轴系有限元模型,通过Mesh进行网格划分,模拟计算了液下泵工作过程中的强度与刚度,并根据动力学理论分析了转子系统的临界转速与振型。结果表明,液下泵的强度满足要求,但Y方向最大挠度为0.2 mm,轴应加粗或在靠近叶轮位置布置支点。转速范围中存在某一共振点应避开。研究结果为该型泵的选型与设计提供了重要的参考。

In order to analyze the strength,deflection and critical speed of the shaft of vertical long shaft sub-merged pump,the Static Structural and Modal on the ANSYS WORKBENCH software were adopted.The three-dimensional finite element model of a submerged pump shafting was established by using PRO/E.Mesh was used to simulate and calculate the strength and stiffness of the pump during its operation.The critical speed and vibration mode of the rotor system were analyzed according to the dynamic theory.The results show that the strength of the submerged pump meets the requirements,but the maximum deflection in the Y direction is 0.2 mm,and the shaft should be thickened or designed a pivot near the impeller.There is a resonance region in the range of operating.The research results provide an important reference for the selection and design of the pump.