Cui Yunxian, Gao Pengfei, Tang Wuchu, Mo Guowei, Yin Junwei
School of Mechanical Engineering, Dalian Jiaotong University, Dalian 116028, China.
Sensors (Basel). 2022 Apr 7;22(8):2838. doi: 10.3390/s22082838.
With the continuous improvement of train speeds, it is necessary to find the possible problems of bearings in time, otherwise they will cause serious consequences. Aiming at the characteristics of rapid temperature change of bearings, a thin film thermocouple temperature sensor was developed to measure the real-time temperature of the bearing's rolling elements during train operation. Using dc pulse magnetron sputtering technology, AlO film, NiCr film, NiSi film, and SiO film were successively deposited on an aluminum alloy substrate. We studied their microstructure, static characteristics, dynamic characteristics, and repeatability. Finally, we installed an adaptive film temperature sensor on the bearing testing machine to measure the temperature of the rolling elements. The results show that the developed temperature sensor has good linearity in the range of 30180 ℃. The Seebeck coefficient is 40.69 μV/℃, the nonlinear fitting error is less than 0.29%, the maximum repeatability error is less than 4.55%, and the dynamic response time is 1.42 μs. The temperature of the measured rolling elements is 610 ℃ higher than that of the outer ring, which can reflect the actual temperature of the bearing operation.
随着列车速度的不断提高，及时发现轴承可能存在的问题很有必要，否则会造成严重后果。针对轴承温度变化迅速的特点，研制了一种薄膜热电偶温度传感器，用于测量列车运行过程中轴承滚动体的实时温度。采用直流脉冲磁控溅射技术，在铝合金基底上依次沉积AlO膜、NiCr膜、NiSi膜和SiO膜。研究了它们的微观结构、静态特性、动态特性和重复性。最后，在轴承试验机上安装了自适应薄膜温度传感器来测量滚动体的温度。结果表明，所研制的温度传感器在30180℃范围内具有良好的线性度。塞贝克系数为40.69μV/℃，非线性拟合误差小于0.29%，最大重复性误差小于4.55%，动态响应时间为1.42μs。测得的滚动体温度比外圈温度高610℃，能够反映轴承运行的实际温度。
