机械密封润滑膜分布的超声检测技术

针对机械密封润滑膜分布检测问题，利用超声原理建立了机械密封润滑膜分布的多点测量模型。构建了由信号发生、超声发射-接收、数据采集及数据存储-显示等模块组成的润滑膜分布测量系统，并配备了模拟测量装置。在模拟测量装置上对厚度为5 μm、10 μm和20 μm的润滑膜进行了检测。结果表明：采用超声原理可对润滑膜分布进行精确测量，单点测量误差范围为0.2～1.1 μm，膜厚5 μm的检测精度最高。

Distribution Detection Method of Film Thickness in Mechanical Seal Based on Ultrasonic Principle

Aiming at the problems of distribution detection of mechanical seal lubricating films, a multi-point measurement model of mechanical seal lubrication film distribution by ultrasonic principles was established herein. A lubrication film distribution measurement system  was constructed, which was composed of modules for signal generation, ultrasonic transmission-reception, data acquisition, and data storage-display and equipped with an analog measurement device. Lubrication films with thicknesses of 5 μm, 10 μm and 20 μm were tested on an analog measuring device. The results show that the ultrasonic film principle may be used to accurately measure the distribution of the lubrication films, the single point measurement error ranges are 0.2~1.1 μm, and the detection accuracy is the highest when the film thickness is as 5 μm.