球塞式液压泵配流轴平衡特性

Balancing characteristics of flow divider pintle in ball piston pump

在轴向压力线性分布的条件下,建立了配流副的流场模型,同时建立了配流轴支承系统在突变载荷下的动态仿真模型,在此基础上对球塞式液压泵配流轴的平衡特性进行了研究。结果表明配流轴支承系统具有压力反馈的闭环调节作用,配流轴在压力反馈作用下恢复到偏心率为0的平衡状态,且没有超调量。为高效球塞式液压泵配流副的设计提供了理论依据,同时为高功率密度球塞式液压元件的深入研究打下了基础。

The flow field model of port plate pair in condition of the linear axial pressure distribution and dynamic model of flow divider pintle supporting system in abruptly variable load were established.Based on the two models,the balancing characteristics of flow divider pintle in ball piston pump was investigated.The results show that the flow divider pintle supporting system has a closed loop adjusting effect with pressure feedback.The flow divider pintle returns to the balancing state with a zero eccentricity under the pressure feedback and has no overshoot.It provides theoretical basis for designing flow divider pintle in ball piston pump with high efficiency and lays a foundation for further study of ball piston elements with high power density.