水液压泵柱塞副织构单元的润滑及承载特性分析  

Lubrication and Bearing Characteristics Analysis of Textured Unit in Water Hydraulic Pump Piston Pair

作　　者：何涛[1,2,3] 李哲 王传礼[1,2,3] 罗刚 秦颖 邓海顺[1,2,3] HE Tao;LI Zhe;WANG Chuanli;LUO Gang;QIN Ying;DENG Haishun(School of Mechatronics Engineering,Anhui University of Science and Technology,Huainan Anhui,232001;Collaborative Innovation Center of Mine Intelligent Equipment and Technology,Anhui University of Science and Technology,Huainan Anhui,232001;Anhui Key Laboratory of Mine Intelligent Equipment and Technology,Anhui University of Science and Technology,Huainan Anhui,232001)

机构地区：[1]安徽理工大学机电工程学院,安徽淮南232001 [2]安徽理工大学矿山智能技术与装备省部共建协同创新中心,安徽淮南232001 [3]安徽理工大学矿山智能装备与技术安徽省重点实验室,安徽淮南232001

出　　处：《液压与气动》2024年第11期111-121,共11页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(52205041);安徽省自然科学基金项目(2008085QE216);安徽省高校优秀青年人才支持计划项目(gxyq2022017);安徽省矿山智能技术与装备科研创新团队(2022AH010052)。

摘　　要：为研究水基轴向柱塞泵织构化柱塞副的润滑及承载特性,建立了轴向柱塞泵AMESim仿真模型,得出单柱塞往复速度、有效织构区长度与其腔内压力特性间的对应关系。建立织构化柱塞副的简化CFD润滑及承载力模型,分析了单周期内织构单元的压力云图、压力分布曲线及承载力特性曲线,研究了织构半径、深度及形貌对柱塞副润滑及承载特性的影响。结果表明:柱塞表面承载力曲线与柱塞腔压力脉动及压力梯度曲线的规律较为一致,在高压区柱塞承载力高,呈出与压力梯度曲线相应的波动式下降特征,而低压区柱塞承载力较低;仿真条件下,增大织构半径及深度均有助于提高柱塞表面承载力,且织构形貌对承载力影响较大,承载力由高到低的形貌依次为圆柱形、球冠形、菱形、方形和三角形。此外,织构收敛楔和发散楔开口大小分别对织构单元的正压核心和负压核心区的面积影响较大,且横截面为直角过渡的圆柱形织构比圆弧过渡的球冠形织构更利于压力集聚。In order to study the lubrication and bearing characteristics of the textured piston pair of the water-based axial piston pump,the AMESim simulation model of the axial piston pump is established,and the correspondence between the reciprocating speed of the single piston,the length of the effective texture zone and its pressure characteristics in the cavity are obtained.Then the simplified CFD lubrication and bearing model of the texture piston pair is established,and the pressure maps,pressure distribution curves,and the bearing characteristics curves of the texture unit in a single cycle are analyzed.On this basis,the influence of the texture radius,depth and morphology on the lubrication and bearing characteristics of the piston pair is investigated.The results show that the bearing capacity curve of the piston surface is generally consistent with the pressure pulsation and pressure gradient curve of the piston cavity,and the bearing capacity is high in the high-pressure area,which shows a fluctuating downward characteristic corresponding to the pressure gradient curve.The bearing capacity of the plunger in the low-pressure area is relatively low.Under the simulation conditions,increasing the radius and depth of the texture helps to improve the bearing capacity of the piston surface,and the morphology of the texture has a greater influence on the bearing capacity,and the morphology of the bearing capacity from high to low is cylindrical,spherical crown,rhombus,square and triangle in the order of shape.In addition,the opening sizes of the converging and diverging wedges of the texture have a greater influence on the areas of the positive and negative pressure cores of the texture unit,and the cylindrical texture with a right-angle cross-section transition is more conducive to pressure agglomeration than the spherical crown texture with a circular cross-section transition.

关 键 词：柱塞泵 柱塞副 织构 润滑 承载力 

分 类 号：TH137[机械工程—机械制造及自动化]