涡轮自增压轴向柱塞泵全流域流场特性分析  

Analysis of Full-basin Flow Field Characteristics of Turbine Self-pressurizing Axial Piston Pump

作　　者：陈远玲[1] 田成龙 任晓智[1] 闫明洋 黎超亮 CHEN Yuanling;TIAN Chenglong;REN Xiaozhi;YAN Mingyang;LI Chaoliang(School of Mechanical Engineering,Guangxi University,Nanning,Guangxi 530004)

机构地区：[1]广西大学机械工程学院,广西南宁530004

出　　处：《液压与气动》2024年第8期29-36,共8页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(52265005)。

摘　　要：为了探究离心涡轮自增压装置对高速轴向柱塞泵内液流流动特性的影响,建立了轴向柱塞泵的仿真模型,通过CFD仿真技术研究了离心涡轮与柱塞泵耦合运行时泵内部全流域流场的压力特性、速度特性以及空化特性。研究表明:装配有离心涡轮的轴向柱塞泵吸油能力显著提升,且对射流空化、吸空空化均有抑制作用,其中对吸空空化的抑制效果最显著。应用涡轮增压系统后,单个柱塞腔旋转一周过程中的时均气相体积从59.54 mm^(3)降至1.66 mm^(3),最大气相体积分数由0.155降至0.029,阻尼槽区域的射流速度由100 m/s降至75 m/s,而涡轮所消耗功率仅占柱塞泵轴功率的9.7%。In order to investigate the influence of the centrifugal turbine self-pressurizing device on the flow characteristics of the high-speed axial piston pump,a simulation model of the axial piston pump was established,and the pressure characteristics,velocity characteristics and cavitation characteristics of the whole basin flow field inside the pump when the centrifugal turbine was coupled with the piston pump were investigated by CFD simulation.The study shows that the oil suction capacity of the axial piston pump assembled with centrifugal turbine is significantly improved,and it has inhibiting effect on jet cavitation and suction cavitation,among which the inhibiting effect on suction cavitation is the most significant.After the application of the turbocharging system,the time-averaged gas phase volume of a single piston cavity during one week of rotation was reduced from 59.54 mm^(3) to 1.66 mm^(3),the maximum gas phase volume fraction was reduced from 0.155 to 0.029,and the jet velocity in the damping groove area was reduced from 100 m/s to 75 m/s,while the power consumed by the turbine accounted for 9.7% of the axial power of the piston pump.

关 键 词：轴向柱塞泵 离心涡轮 CFD仿真 流场特性 空化 

分 类 号：TH137[机械工程—机械制造及自动化]