Li Chen, Feng Qiyun, Hong Yingping, Gao Lixia, Guo Ximing, Xue Wenzhi, Xiong Jijun
State Key Laboratory of Dynamic Measurement Technology, North University of China, Taiyuan 030051, China.
Science and Technology on Electronic Test and Measurement Laboratory, North University of China, Taiyuan 030051, China.
Nanomaterials (Basel). 2022 Aug 23;12(17):2899. doi: 10.3390/nano12172899.
As the key component of aero-engines and industrial gas turbines, a bearing’s working temperature at high speed is close to 300 ℃. The measurement of an engine bearing’s temperature is of great significance to ensure flight safety. In this study, we present a wireless LC conformal temperature sensor for bearing temperatures, which integrates silver on the bearing surface in situ through a screen-printing process. This process makes Ag film (9912-K FL) firmly adhere to the bearing surface and realizes wireless measurements for bearing temperatures in situ. A high-temperature holding experiment of the prepared sensor was conducted, and the results showed that the sensor can work stably for 10 h at 300 ℃. We tested the designed wireless LC conformal temperature sensor at 20−270 ℃. The results showed that the proposed temperature sensor attained as good accuracy and stability in the temperature range 20−270 ℃. The sensitivity of the temperature measurements was 20.81 KHz/℃ when the bearing rotateds, the maximum repeatability was 0.039%, the maximum uncertainty was 0.081%, and the relative error was stable within 0.08%.
作为航空发动机和工业燃气轮机的关键部件，轴承在高速运转时的工作温度接近300℃。测量发动机轴承的温度对于确保飞行安全具有重要意义。在本研究中，我们提出了一种用于轴承温度测量的无线LC共形温度传感器，该传感器通过丝网印刷工艺在轴承表面原位集成银。这一工艺使银膜（9912-K FL）牢固地附着在轴承表面，并实现了对轴承温度的原位无线测量。对制备的传感器进行了高温保持实验，结果表明该传感器在300℃下可稳定工作10小时。我们在20−270℃范围内对所设计的无线LC共形温度传感器进行了测试。结果表明，所提出的温度传感器在20−270℃温度范围内具有良好的精度和稳定性。当轴承旋转时，温度测量的灵敏度为20.81 KHz/℃，最大重复性为0.039%，最大不确定度为0.081%，相对误差稳定在0.08%以内。
