外负载对径向柱塞泵滑靴副流场特征和强度的影响  

Effects of External Load on the Flow Field Characteristics and Strength of the Slipper Pair of a Radial Piston Pump

作　　者：李少年[1] 程乐 周致元 张子骞 陈世豪 LI Shaonian;CHENG Le;ZHOU Zhiyuan;ZHANG Ziqian;CHEN Shihao(College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou Gansu 730050,China)

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730050

出　　处：《机床与液压》2024年第17期156-161,共6页Machine Tool & Hydraulics

基　　金：国家自然科学基金项目(52165006)。

摘　　要：针对高压大排量径向柱塞泵在重载领域出现的滑靴副失效问题,在考虑油液黏温黏压特性的基础上,对滑靴副流体域展开数值计算和流固耦合仿真分析,探讨外负载对滑靴副流体域压力、流速、泄漏以及滑靴结构强度的影响。结果表明:当外负载从1.1×10^(8)N增加到1.2×10^(8)N时,吸油区滑靴副流体域的压力分布和数值基本不变,排油区滑靴副中心油腔压力增大1.5 MPa,流体域油膜的高压区面积增大,油液压力增大了0.05 MPa,油液流速稍有增加;滑靴副油液泄漏主要位于滑靴副边界处,高、低阻尼孔泄漏较小,随着外负载的增大,3处泄漏量都增大,单个滑靴副总泄漏量增大0.05 mL/s;外负载对滑靴强度影响较小,在排油区滑靴最大应力与变形发生在中心油腔处,此处是滑靴结构强度较为薄弱的地方。Aiming at the problem of slipper failure in high-pressure and large-displacement radial piston pumps,the effects of external load on the pressure,flow rate,leakage of fluid domain and structural strength of the slipper were studied by numerical calculations and fluid-solid coupling simulation,considering the characteristics of oil viscosity,temperature and pressure.The results show that the pressure distribution and values in the oil suction area fluid domain of slipper pair remain mostly constant when the external load increases from 1.1×10^(8)N to 1.2×10^(8)N.The pressure in the central oil cavity of the slipper increases by 1.5 MPa,which expands the high-pressure area of the oil film in the fluid domain and increases the oil pressure by 0.05 MPa.These changes cause a slight increase in the velocity of flow.Main leakage of the slipper pair occurs at the boundary,and the leakage from the high-pressure and low-pressure damping holes is negligible.An increase in external load results in increased leakage at all three locations,causing a rise in the total leakage of a single slipper pair by 0.05 mL/s.The research indicates that the external load has a negligible impact on the strength of the slipper.The maximum stress and deformation occur in the central oil cavity when the slipper lies in the oil discharge area,which is the weakest part of the slipper structure.

关 键 词：径向柱塞泵 滑靴副 外负载 流场 泄漏 应力 变形 

分 类 号：TH137[机械工程—机械制造及自动化]