A Laser Interference-based Flaw Detection Device for Hydraulic Turbine Units

Hydroelectric turbine generator sets play a key role in power production as important energy devices. However, the complexity of its internal structure makes it susceptible to the threat of defects such as cracks, which may pose a serious risk to the safety and reliability of the equipment. Although traditional ultrasonic flaw detection methods are widely used, their application is limited when faced with problems such as high cost, low efficiency, and unclear display of defects. Therefore, this study aims to solve these problems and improve the efficiency and accuracy of defect detection through the development of a laser interference-based flaw detection device for hydro generator sets. The core idea of the device is to detect internal and external defects of the hydraulic turbine unit by analyzing the position and shape of the interference fringes using the laser interference principle. We describe in detail the system components of the device, including the laser scanning system, the flaw detection system and the data acquisition and processing system, as well as the working principle. Through experimental verification, it is proved that the device has the advantages of high precision and high efficiency, and provides a new effective tool for the operation and maintenance of hydropower plants.