摘要
针对高转速轴向柱塞泵滑靴副受到周期性压力的作用,易造成润滑失效和损坏的问题,进行滑靴副强度与摩擦仿真研究。建立滑靴副流体域模型,通过流场仿真得到滑靴副流场特征分布;通过流固热耦合仿真和摩擦仿真,分别得到滑靴变形、应力分布和磨损量;最后开展滑靴副材料的摩擦磨损试验,分析滑靴副的摩擦学特性。结果表明:油液从滑靴中心油腔向外辐射流动,压力沿半径向外呈对数规律递减;滑靴底面变形量沿半径方向逐渐增大,最大变形出现在外边缘处,为8.842×10^(-3)mm;滑靴受到最大应力出现在密封带处,为1095.1 MPa;摩擦仿真发现滑靴磨损量因滑靴在斜盘上径向位置的不同而不同,最大磨损量为9.0676×10^(-4)mm^(3);滑靴密封带的变形量沿半径方向由内向外逐渐增大;沿斜盘半径方向,滑靴外侧较内侧的磨损大;摩擦副的摩擦因数较为稳定,约为0.168,滑靴试件磨损率的仿真结果比试验结果小1个数量级。
Aiming at the problem of lubrication failure and damage caused by periodic pressure on the slipper pair of high-speed axial piston pump,a simulation study on the strength and friction of the slipper pair was carried out.A fluid domain model for the slipper pair was established and the characteristics distribution of the flow field was obtained by flow field simulation.The deformation,stress distribution and wear of the slipper were obtained respectively through fluid solid thermal coupling simulation and friction simulation.Finally,the friction and wear tests on the materials of the slipper pair were conducted and the frictional characteristics were analyzed.The results show that the oil is radiated outward from the centre oil chamber of the slipper,and the pressure decreases logarithmically along the radius outward.The deformation of the slipper bottom surface increases gradually along the radius direction,and the maximum deformation is 8.842×10^(-3)mm at the outer edge.The maximum stress(1095.1 MPa)is located in the sealing zone.The wear amount of the slipper obtained from friction simulation varies along the radial position of the slipper on the swash plate,with a maximum wear amount of 9.0676×10^(-4)mm^(3).The deformation of the slipper sealing belt gradually increases from the inside to the outside along the radius direction.Along the radius of the swash plate,the wear of outer side of the slipper is more worn than the inner side.The friction coefficient of the friction pair varies relatively stable,with a value of about 0.168.The simulation results of the wear rate of the slipper specimen are one order of magnitude smaller than the experimental results.
作者
李少年
杨龙涛
李曦
陈世豪
张子骞
LI Shaonian;YANG Longtao;LI Xi;CHEN Shihao;ZHANG Ziqian(College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou Gansu 730050,China;Key Laboratory of Advanced Pumps,Valves and Fluid Control System,Ministry of Education,Lanzhou University of Technology,Lanzhou Gansu 730050,China)
出处
《机床与液压》
北大核心
2025年第4期139-145,共7页
Machine Tool & Hydraulics
基金
国家自然科学基金地区科学基金项目(52165006)
甘肃省教育厅高校科研创新平台重大培育项目(2024CXPT-09)。
关键词
轴向柱塞泵
高转速
滑靴副
应力
变形
磨损量
axial piston pump
high speed
slipper pair
stress
deformation
wear amount
