斜盘式轴向柱塞泵转子系统动态特性分析

以滑靴副和配流副为切入点,明确了柱塞泵转子与壳体之间的作用关系;进一步借助转子动力学和有限元方法,分析了斜盘式轴向柱塞泵转子系统的动态特性。在考虑柱塞泵转子系统中柱塞-滑靴组件的非对称分布的基础上,建立了柱塞泵转子有限元模型,使用结构载荷代替转子与壳体间的作用关系,对柱塞泵转子和壳体进行切分,计算了柱塞泵转子所受的稳态激励;基于所建模型计算了柱塞泵转子的瞬态响应,分析了转子轴承刚度特性对响应结果的影响。得到了柱塞-滑靴组件对柱塞泵转子的偏心作用可等效为一恒定偏载这一规律,确定了轴承刚度变化对转子响应的频率成分影响,为进一步计算柱塞泵壳体的结构振动响应和壳体结构优化奠定了基础。

Dynamic Characteristic Analysis for Rotor System of Swash-plate Axial Piston Pump

In this paper, the interaction between the rotor and the shell of the piston pump is clarified, taking the slipper pair and port pair as the entry point. Further, the dynamic characteristics of swash plate axial piston pump rotor system are analyzed, using rotor dynamics and finite element method. The finite element model of the piston pump rotor is established, separating the piston pump rotor from the shell and using structural loads instead of the relationship between the rotor and shell, and the steady-state excitation of the piston pump rotor is calculated, considering the asymmetric distribution of piston and slipper in the piston pump rotor system. Utilized the rotor finite model, the transient response of the piston pump rotor is calculated. And the influence of the bearing stiffness on the rotor response is analyzed. Based on this, the eccentric action of piston-slipper assembly which can be equivalent to a constant eccentric load is obtained, and determine how the bearing stiffness characteristics affect the rotor response frequency components, which provide a foundation for further calculating the structural vibration response of piston pump shell and optimizing the shell structure.