The thermal characteristics of bearing rotating elements are essential for the service evaluation of bearing. However, the existing monitoring methods are limited by bearing internal complex structure and extreme operating environment. Hence, based on the monitoring technology of CdTe quantum dots (QDs) sensor, an improved QDs sensor was fabricated by process optimization and polymers coating, which enables bearing rotating elements thermal monitoring for extreme working condition. First, the principle of the measurement was introduced and the existing problems were analyzed. Then, the influence of preparation process on temperature-dependent photoluminescence (PL) spectra of CdTe QDs was investigated. The performance improvement methods of the QDs sensor, both organic coating and inorganic coating, were investigated. The fabricated sensor named CdTe@PVA presents remarkable improved performance in fluorescence intensity, highest tolerable temperature and stability. In the end, a rolling bearing experimental rig was set up and the temperature of the bearing cage at different rotation speeds were captured by using the proposed CdTe@PVA sensor.

中文翻译：

---

使用 CdTe 量子点作为耐热温度传感器来监测轴承旋转元件


轴承旋转元件的热特性对于轴承的使用评估至关重要。然而，现有的监测方法受到轴承内部复杂结构和极端运行环境的限制。因此，基于CdTe量子点（QDs）传感器的监测技术，通过工艺优化和聚合物涂层制造了改进的QDs传感器，该传感器能够实现轴承旋转元件在极端工况下的热监测。首先介绍了测量原理并分析了存在的问题。然后，研究了制备工艺对CdTe量子点的温度依赖性光致发光（PL）光谱的影响。研究了有机涂层和无机涂层量子点传感器的性能改进方法。所制造的传感器名为 CdTe@PVA，在荧光强度、最高耐受温度和稳定性方面具有显着改进的性能。最后，搭建了滚动轴承实验装置，并使用所提出的CdTe@PVA传感器捕获了不同转速下轴承保持架的温度。