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Evaluation of Tribological Behavior of PEEK Composite Bearing Using Thermal Decomposition Analysis of Wear Debris and Its Application to Condition Monitoring

利用磨屑热分解分析评估 PEEK 复合轴承的摩擦学行为及其在状态监测中的应用

基本信息

批准号：
16560131
负责人：
AKAGAKI Tomoharu
金额：
$ 2.37万
依托单位：
Hachinohe Institute of National Colleges of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2005
项目状态：
已结题

项目摘要

The friction and wear behaviors of PEEK composite were studied under severe lubricated conditions such as high load and high sliding velocity. Wear debris was analyzed using thermal decomposition analysis, spectrometric oil analysis procedure (SOAP), laser diffraction particle size analyzer and ferrographic technique. The following conclusions were obtained.1.The sudden transit from mixed lubrication to seizure occurred at a certain load in both of white metal and PEEK composite, as the load increased.2.The onset of seizure in PEEK composite was strongly dependent on the ring temperature. As the ring temperature reached about 100℃, the transition from fluid lubrication to mixed lubrication occurred. When it was over 180-190℃, seizure occurred.3.Severe plastic flow and tearing type fracture were predominant on the wear scars of PEEK composite in seizure. Thus It was suggested that seizure caused severe plastic flow of PEEK material due to softening and melting at high temperature and might lead to failure of PEEK composite bearing.4.Seizure could be characterized by generation of cylindrical, ribbon-like, plate-like and carbon fiber war debris. Most of them were less than a few tens micrometer in size.5.The thermal decomposition analysis could detect PEEK wear debris because it was decomposed into phenol at high temperature. However, the amount of PEEK wear debris generated in laboratory test was only a few. In order to increase the detection accuracy, it is indispensable to develop new method for concentration of oil sample in a short time. This is the subject in future. Thus, it was suggested that the thermal decomposition analysis had a high potential as a failure diagnosis tool of PEEK composite bearing as well as other wear debris analysis.

研究了聚醚醚酮复合材料在高载荷、高滑动速度等恶劣润滑条件下的摩擦磨损行为。采用热分解分析、油液光谱分析、激光粒度分析仪和铁谱技术对磨粒进行了分析。得到了以下结论：1.随着载荷的增加，白色金属和PEEK复合材料在一定载荷下都发生了从混合润滑到咬合的突然转变。2.PEEK复合材料的咬合发生强烈依赖于环的温度。当环温度达到100℃左右时，发生了从流体润滑到混合润滑的转变。当超过180~190℃时，发生癫痫发作。3.癫痫发作时PEEK复合材料的磨损伤痕以严重的塑性流动和撕裂型断裂为主。由此可见，由于PEEK材料在高温下的软化和熔化，卡死导致了PEEK材料的严重塑性流动，并可能导致PEEK复合材料轴承的失效。4.磨损的特征是产生圆柱状、带状、片状和碳纤维的战争碎屑。热分解分析表明，PEEK磨屑在高温下分解为苯酚，可以检测到PEEK磨屑。然而，在实验室试验中产生的PEEK磨屑数量很少。为了提高检测精度，有必要在短时间内开发新的油样浓缩方法。这是未来的主题。因此，热分解分析作为聚醚醚酮复合轴承和其他磨粒分析的故障诊断工具具有很大的潜力。