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Evaluation of Tribological Properties of PTFE-Composite Material and its Application to Maintenance-Free Bearing

PTFE复合材料摩擦学性能评价及其在免维护轴承中的应用

基本信息

批准号：
09555058
负责人：
AKAGAKI Tomoharu
金额：
$ 5.06万
依托单位：
Hachinohe National College or Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09555058/
关键词：
PTFE-Based Composite Material Tribology Sliding Bearing High Sliding Velocity Maintenance Wear Debris

项目摘要

Friction and wear behavior of PTFE-based composite was evaluated under various experimental conditions. The obtained results were as follows :1. At the sliding velocity above 10m/s, friction coefficient was constant at 〜0.3. The wear rate of the composite was of the order of 10ィイD1-6ィエD1(mmィイD13ィエD1/Nm). Thus the composite did not transit to a catastrophic wear such as seizure under the severe sliding condition. After friction, matrix of the composite was covered with much fine and brown oxide particles. Glass fibers were polished and became flat. It is suggested that these embedded oxide particles and glass fiber fillers strengthened the composite surface.2. Friction and wear of PTFE-based composite was not strongly dependent on the mating surface roughness. Even if the surface roughness became larger than the oil film thickness, mixed lubrication persisted. Further, mixed lubrication was maintained at high temperature of 100-150℃ and friction coefficient was 0.02-0.04. Thus PTFE-based composite had a high capacity for maintaining mixed lubrication.3. As the amount of wear debris generated in the wear test was too small, wear debris was not detected clearly by laser diffraction particle size analyzer. Size of detected wear debris was small and 0.4μm. Thus it was concluded that lubricated wear of PTFE-based composite was very small.From above results, it was concluded that the PTFE-based composite had a high potential for the practical use as the maintenance-free sliding bearing.

研究了PTFE基复合材料在不同试验条件下的摩擦磨损性能。主要研究结果如下：1.当滑动速度大于10 m/s时，摩擦系数为0.3。复合材料的磨损率为10 μ m D1-6 μ m D1（mm × D13 μ m D1/Nm）。因此，复合材料没有过渡到一个灾难性的磨损，如在严重的滑动条件下的卡死。摩擦后，复合材料基体表面覆盖着大量细小的棕色氧化物颗粒。玻璃纤维被抛光并变得扁平。这些嵌入的氧化物颗粒和玻璃纤维填料增强了复合材料表面. PTFE基复合材料的摩擦磨损性能与摩擦副表面粗糙度关系不大。即使表面粗糙度变得大于油膜厚度，混合润滑仍然存在。在100-150℃的高温条件下，保持了混合润滑状态，摩擦系数为0.02 ~ 0.04。因此PTFE基复合材料具有较高的混合润滑保持能力.由于磨损试验中产生的磨屑量太小，激光衍射粒度分析仪无法清晰地检测到磨屑。检测到的磨屑尺寸较小，为0.4μm。结果表明，PTFE基复合材料的润滑磨损很小，具有作为免维护滑动轴承的实用潜力。