带预压缩腔结构的柱塞泵出口流量分析及实验  

Flow Rate Analysis and Experiment for Piston Pump with a Pre-compression Chamber

作　　者：杨辉[1] 吴小锋[1] 江炜[1] YANG Hui;WU Xiaofeng;JIANG Wei(School of Mechanical and Vehicle Engineering, Changzhou Institute of Technology, Changzhou Jiangsu 213002,China)

机构地区：[1]常州工学院机械与车辆工程学院,江苏常州213002

出　　处：《机床与液压》2020年第8期16-22,6,共8页Machine Tool & Hydraulics

基　　金：国家自然科学基金资助项目(51305049);江苏省自然科学基金资助项目(BK20150256)。

摘　　要：以某型号带预压缩腔结构的高压柱塞泵为对象,建立该柱塞泵内部流体模型,利用计算流体动力学软件PUMPLINX对该柱塞泵内部流体动力学进行仿真,分析负载压力、转速以及不同的预压缩腔结构参数对高压柱塞泵出口流量脉动率的影响。结果表明:当预压缩腔节流孔直径分别为2、3和4 mm时,泵出口流量脉动率分别为39.87%、16.43%和17.67%;当预压缩腔节流孔跨度分别为5°、9°和12°时,泵出口流量脉动率分别为17.56%、13.21%和14.15%;当预压缩腔体积从200 cm^3增大至300 cm^3时,泵出口流量脉动率从22.67%减小至14.41%,当预压缩腔体积继续从300 cm^3增大至400 cm^3时,泵出口流量脉动率基本保持不变。该仿真结果为泵内部预压缩腔结构的设计与优化奠定了理论基础。最后对该高压柱塞泵进行了流量测试实验,实验结果与仿真结果一致,证明了仿真数据的正确性。Taking a high pressure piston pump with a pre-compression chamber as the object,the internal three dimensional fluid model was built and simulated by computational fluid dynamic software PUMPLINX.The influence of load pressure,rotating speed and structure parameters of different pre-compression chamber on the flow ripple rate of high pressure piston pump outlet was analyzed.The simulation results show that when the pre-compression chamber damping hole diameter is respectively 2,3 and 4 mm,the pump outlet flow ripple rate is respectively 39.87%,16.43%and 17.67%;when the pre-compression chamber damping hole span is respectively 5°,9°and 12°,the pump outlet flow ripple rate is respectively 17.56%,13.21%and 14.15%;when the pre-compression chamber volume increases from 200 cm^3 to 300 cm^3,the pump outlet flow ripple rate reduces from 22.67%to 14.41%,but with the pre-compression chamber volume increases from 300 cm^3 to 400 cm^3,the pump outlet flow ripple rate remains basically unchanged.The simulation results lay theoretical foundation for the design and optimization of the pre-compression chamber structure in the pump.Finally,the flow test experiment of the high pressure piston pump was carried out,and the experimental results were consistent with the simulation results,which proved the correctness of the simulation.

关 键 词：柱塞泵 流量脉动 预压缩腔 

分 类 号：TP182[自动化与计算机技术—控制理论与控制工程]