弹性变形对轴向柱塞泵配流副润滑特性的影响

Influence of elastic deformation on lubricating characteristics of port plate pair of axial piston pump

考虑到配流副在高压条件下的弹性变形量已与油膜厚度同一量级,该文应用弹性流体动力润滑理论,建立了弹性变形条件下配流副的润滑数学模型,采用有限差分法求解了模型的控制方程,进行了弹性变形对配流副润滑特性的影响分析。结果表明,在油膜厚度较小时,配流副的弹性变形使平均油膜厚度相比增大了14.48%,但最大油膜压力却减小了18.60%,且配流副的油膜承载力和泄漏量明显增大,而摩擦转矩明显减小;但油膜厚度大于15?m时,可以忽略弹性变形对配流副润滑特性的影响。研究为高压化轴向柱塞泵配流副的设计与研究打下了基础。

Considering the magnitude of elastic deformation was the same as the film thickness of port plate pair under high pressure,the model of lubrication was established by the theory of elastohydrodynamic lubrication.The influence of elastic deformation on lubricating characteristics was analyzed using finite difference method.The results showed that the average film thickness increased by 14.48%,but the largest film pressure decreased by 18.6%in the elastic case.And the film load capacity and leakage increase obviously,but frictional torque decreases obviously in the condition of small film thickness.By contraries,the influence of elastic deformation on lubricating characteristics could be neglected in the condition of large film thickness beyond the film thickness 15μm.The study lays a foundation for design and research on port plate pair of high-pressure axial piston pump.