轴向柱塞泵的模态仿真

Modal analysis of axial piston pump

以斜盘式轴向柱塞泵作为研究对象,运用有限元分析的方法,对其施加满足实际工况的约束,在计算机容量允许的情况下,选择精度更高的单元和划分更细的网格密度,计算出柱塞泵的固有频率以及模态振型。为了验证有限元法计算结果,又通过实地的振动试验,具体测出了柱塞泵的共振频率,验证了有限元计算结果的正确性。利用经过验证的有限元模型,在计算机上作结构改进仿真设计,找到提高柱塞泵共振频率的措施。通过多种方案比较,本文采用将柱塞泵前端的圆柱滚子轴承改成深沟球轴承,可以实现在不改动柱塞泵其他零件尺寸的前提下,提高柱塞泵的模态频率,使柱塞泵更不易发生共振。

FEA simulation method is applied to the axial piston pump. The model frequency and model shape are given which constraints with real work conditions are applied to pump and choosing more precise element and high density of meshing Vibration tests were done in order to verify the simulation; finally the resonant frequency was detected and made a conclusion that the simulation result is right. Making use of the verified FEA model, the simulation structure design was done in the computer to find methods that can increase the resonance frequency. With the compared of many plans, to change the column beating into ball beating can increase resonant frequency of pump without other element modified and avoid resonating in the axial piston pump