高速高压轴向柱塞泵缸体的气穴机理研究
Cavitations Mechanism Study of High-speed and High-pressure Axial Piston Pump Cylinder

以斜盘式柱塞泵为例，利用计算流体动力学（computational fluid dynamics，CFD）仿真分析计算了其在同一转速下不同直径比的情况下气穴发生情况，给出在保证泵流量情况下柱塞及吸油孔极限直径比的计算公式。并比较了在同一工况同一直径比不同进油口结构的气穴情况。通过计算结果的分析知道柱塞直径与吸油孔直径的直径比对缸体的气穴影响较大，不同的吸油孔结构对气穴的影响较大。从气穴产生的原因分析柱塞泵的气穴，对于柱塞泵缸体及柱塞的设计提供了理论依据及设计指导。
Having a swash plate piston pump as an example in the paper, the cylinder cavitations mechanism at the same speed and under different diameter ratios was studied and simulated based on computational fluid dynamics (CFD). A formula to calculate the limiting diameter ratio of the plunger and the suction hole was given to ensure the pump flow conditions. The cavitations of the different inlet structure under the same condition and the same diameter ratio were investigated and compared. By the results of the analysis know that the diameter ratio of the plunger and the suction hole has greatly impact on cylinder cavitations, and the different suction hole structures have greatly impact on cylinder cavitations. And the cause of cavitations of the piston pump was also analyzed. This study provides a theoretical basis and design guidance for the design of the piston pump cylinder and piston