球塞泵配流轴动静压支撑规律研究

摘要

The supporting characteristics of flow distribution shaft in a ball piston pump at the steady operating condition were studied.The flow field model was developed and the hydrostatic pressure was solved using the resistance network method.Considering the radial force obtained by the hydrostatic pressure and hydrodynamic force,a dynamic model was built,and the effect of the operating pressure on shaft micro-movement was analyzed.The results show that the flow distribution shaft can be supported efficiently at steady operating condition and has a larger stability margin.The eccentricity of the flow distribution shaft is increased with increasing the operating pressure and decreased with increasing the rotating speed,therefore the flow distribution shaft has a larger eccentricity at the operating condition of high pressure and low rotating speed,and it is more easily to be worn.%对球塞泵在稳态工作过程中配流副的油膜支撑规律进行研究.建立配流副的流场模型并通过液阻网络的方法对其静压分布进行求解,得到径向不平衡力,综合配流轴密封带上的动压支撑力,建立配流轴的动力学模型,通过数值迭代计算得到配流轴相对缸体在不同工作压力下的位置变化关系.结果表明,配流轴在稳态工况下可以被有效支撑,且具有较大的稳定裕量;稳定工作状态时的配流轴偏心率随压力的升高而升高,随转速的升高而降低,因此在低速重载时配流轴偏心率较大,容易发生磨损.