• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2020, Vol. 56 ›› Issue (10): 12-18,26.doi: 10.3901/JME.2020.10.012

• 仪器科学与技术 • 上一篇    下一篇

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面向旋转部件监测的耐高温量子点传感器研究

张盼, 闫柯, 朱永生, 洪军, 梁潘婷   

  1. 西安交通大学现代设计与转子轴承系统教育部重点实验室 西安 710049
  • 收稿日期:2019-07-15 修回日期:2019-12-20 出版日期:2020-05-20 发布日期:2020-06-11
  • 通讯作者: 闫柯(通信作者),男,1984年出生,博士,教授,博士研究生导师。主要研究方向为轴承润滑与热特性分析。E-mail:yanke@mail.xjtu.edu.cn
  • 作者简介:张盼,女,1994年出生,博士研究生。主要研究方向为量子点传感器及轴承状态监测。E-mail:zhangpan0203@stu.xjtu.edu.cn
  • 基金资助:
    国家自然科学基金面上(51875439)和国家重点研发计划课题(2018YFB2000603)资助项目。

Research on the Heat Resistant Quantum Dots Sensor for Rotating Components Monitoring

ZHANG Pan, YAN Ke, ZHU Yongsheng, HONG Jun, LIANG Panting   

  1. Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Xi'an Jiaotong University, Xi'an 710049
  • Received:2019-07-15 Revised:2019-12-20 Online:2020-05-20 Published:2020-06-11

摘要: 航空发动机支撑轴承的内圈、保持架等旋转部件的温升特性在线监测对于轴承乃至整机装备的服役状态评估、预警至关重要。面向航空发动机极端工况下轴承内部旋转部件热状态监测需求,在基于碲化镉(Cadmium telluride,CdTe)量子点传感器在线测温原理及技术研究基础上,通过工艺优化提升传感器性能,使其适用于高温、高速等极端工况下航空发动机支撑轴承旋转部件的运行温度监测。控制制备CdTe量子点试验条件(制备时间、配体),通过结构表征探讨量子点的微观形态、平均粒径对其荧光特性的影响机制。搭建高温环境下量子点光致发光温度依赖特性监测试验平台,研究不同量子点传感器光致发光光谱的温度依赖特性及耐高温性能。基于聚乙烯醇(Polyvinyl alcohol,PVA)包覆,制备了CdTe/PVA高稳定性传感器,实现了量子点荧光强度、最高耐受温度、灵敏性以及稳定性的显著提升,为航空发动机支撑轴承旋转部件的在线温度监测奠定了基础。

关键词: 碲化镉量子点, 温度传感器, 轴承旋转部件监测, 航空发动机

Abstract: The temperature rise characteristics of aero-engine supporting bearing's rotating components is the important on-line monitoring index, which is essential for the service evaluation of the bearing and even the whole equipment as well as warning of them. Based on the on-line temperature measurement principle and technology of cadmium telluride (CdTe) quantum dots sensor, an improved CdTe quantum dots sensor is made by process optimization, which is suitable for operating temperature monitoring under high temperature and high speed, and meets the thermal condition monitoring requirements of internal rotating components of aero-engine bearing under extreme working conditions. The experimental conditions (preparation time and ligand) for preparing CdTe quantum dots are controlled, and the influence mechanism of morphology and average diameter of CdTe quantum dots on their fluorescence properties are discussed by structural characterization. The temperature dependence and high temperature resistance of photoluminescence spectra of different quantum dots are studied by the high temperature experimental platform. In the end, the CdTe/PVA sensor is prepared using the coating of polyvinyl alcohol (PVA). Compared with the former CdTe quantum dots sensor, the key indicators of CdTe/PVA sensor, such as fluorescence intensity, maximum temperature tolerance, sensitivity and stability, have improved significantly. The result lays a foundation for on-line temperature monitoring of aero-engine supporting bearing's rotating components.

Key words: CdTe quantum dots, temperature sensor, bearing rotating components monitoring, aero-engine

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