多孔含油聚酰亚胺润滑性能及其与氮化硅配副的摩擦磨损分析  

Lubrication Characteristics of Porous Oil-containing Polyimide and Friction and Wear Analysis of Their Compatibility with Silicon Nitride

作　　者：李颂华[1,4] 邓俊杰 张丽秀 王俊海[2] 魏超 LI Songhua;DENG Junjie;ZHANG Lixiu;WANG Junhai;WEI Chao(School of Mechanical Engineering,Shenyang Jianzhu University,Shenyang 110168,China;Analysis and Testing Technology Research Center,Shenyang Jianzhu University,Shenyang 110168,China;Engineering Training and Innovation College,Shenyang Jianzhu University,Shenyang 110168,China;National-local Joint Engineering Laboratory of NC Machining Equipment and Technology of High-grade Stone,Shenyang 110168,China)

机构地区：[1]沈阳建筑大学机械工程学院,沈阳110168 [2]沈阳建筑大学分析与检测技术研究中心,沈阳110168 [3]沈阳建筑大学工程训练与创新学院,沈阳110168 [4]高档石材数控加工装备与技术国家地方联合工程实验室,沈阳110168

出　　处：《表面技术》2024年第19期70-81,共12页Surface Technology

基　　金：国家自然科学基金委员会面上项目(51975388);辽宁省科技厅应用基础研究计划(2022020429-JH2/1013)。

摘　　要：目的探究多孔聚酰亚胺(PPI)对氮化硅(Si_(3)N_(4))陶瓷材料的减摩润滑效果及其自润滑机理。方法利用Retc球/盘摩擦磨损试验机在浸油和干摩擦条件下进行不同温度和载荷下的滑动摩擦磨损试验,通过泰勒粗糙度仪和3D激光共聚焦显微镜分析试样在不同润滑条件下的磨损机制与润滑机理。结果浸油条件下的摩擦因数及磨损率要明显低于干摩擦条件下的摩擦因数及磨损率,且在试验时间内PPI含油试样保持润滑持续稳定。在滑动摩擦过程中,PPI含油试样由于温度和压力作用,PPI孔隙内的润滑油逐渐向试样表面移动,形成润滑油膜,使摩擦因数处于一个持续较低的状态,对PPI试样起到良好的润滑和保护作用。随着温度和载荷的增加,润滑油黏度及出油量发生变化导致润滑油膜的质量也发生变化,使PPI在浸油条件下的摩擦因数呈现波动的趋势。结论适当的温度与载荷,有利于形成完整且稳定的润滑油膜,起到较好的润滑效果。因此,合理控制温度和载荷,可使PPI减摩润滑效果最佳,为其作为保持架材料在Si_(3)N_(4)全陶瓷轴承中润滑提供指导依据。Porous polyimide(PPI)has become the main material for aerospace bearing cages due to its excellent self-lubrication.To investigate the self-lubricating properties of PPI and its anti-friction and lubrication effect on silicon nitride(Si_(3)N_(4))ceramic materials,PPI was impregnated with polyimide of different viscosities,andα-Two types of PPI oil containing samples were obtained from olefin oil PAO 4 and PAO 10.Centrifuge and vacuum oven were used to conduct centrifugation and heating tests on PPI oil containing samples,to explore the oil storage performance of PPI oil containing samples at different speed and temperature.A Retc ball/disc friction and wear testing machine was used to conduct sliding friction and wear tests at different temperature and load under immersion and dry friction conditions.After the test was completed,the wear and lubrication mechanisms of the samples under different lubrication conditions were analyzed with a Taylor roughness meter and a 3D laser confocal microscope.The results showed that immersing different viscosity poly(alpha olefin)oils into PPI samples resulted in a stable oil content of 17% to 18%for the PPI samples,indicating that PPI samples had a wide range of applications for lubricating oil viscosity.At a speed of 3000 r/min,the sample had good oil retention and almost no oil spills;As the temperature continued to rise,the oil output of the sample gradually increased;The main factor affecting the oil yield of PPI oil containing samples was temperature.Within the scope of test and research,the friction coefficient between two PPI oil-bearing samples immersed in PAO 4 and PAO 10 and Si_(3)N_(4) was 0.04-0.124,showing a stable friction coefficient.Under dry friction conditions,the friction coefficient between PPI samples and Si_(3)N_(4) was 0.343-0.452,showing a fluctuating friction coefficient.The friction coefficient and wear rate under oil immersion conditions were significantly lower than those under dry friction conditions,And the PPI oil containing sample maintained co

关 键 词：多孔聚酰亚胺 Si_(3)N_(4) 润滑性能 摩擦因数 磨损率 

分 类 号：TH117[机械工程—机械设计及理论]