泗阳站4#上机架镜板电蚀现象分析

该文旨在探讨水利工程中上机架镜板电蚀现象的成因及解决方案,以提升水利工程的安全性和运行效能。通过对镜板电蚀现象的机理分析,明确溶解腐蚀、电化学腐蚀和结构等因素综合导致电蚀现象的发生。研究方法包括现场实测、材料特性分析和电化学原理探讨,对泗阳站4#机组镜板进行深入研究。结果显示,电蚀现象会导致镜板表面受损,增加安全隐患,加重经济负担,并缩短使用寿命。为改善这种情况,该文采用针对性的解决措施,如选用抗蚀材料替换原有镜板材质,设计专门的镜板吊装翻转流程,采用研磨台精细化研磨处理,以及制定严格的定期维护和检查制度。经过这些技术改造与维护策略的实施,泗阳站4#机组的镜板电蚀现象得到有效控制,提高镜板工作面的质量要求,确保镜板与推力头间绝缘电阻值高于40 MΩ,导轴瓦与瓦背间电阻值高于50 MΩ,并符合设计粗糙度要求。综合来看,该研究提出的解决方案为类似水利工程中镜板电蚀问题的防治提供有价值的参考案例。

The purpose of this paper is to explore the causes and solutions of the electric erosion of the upper frame mirror plate in the water conservancy project,so as to improve the safety and operation efficiency of the water conservancy project.Through the analysis of the mechanism of electric erosion of mirror plate,it is clear that dissolution corrosion,electrochemical corrosion and structural factors lead to the occurrence of electric erosion.The research methods include field measurement,analysis of material characteristics and discussion of electrochemical principle,and an in-depth study on the mirror plate of Siyang station is carried out.The results show that electric erosion will lead to damage to the surface of the mirror plate,increase the hidden danger of safety,increase the economic burden,and shorten the service life.In order to improve this situation,this paper adopts targeted measures,such as selecting anti-corrosion materials to replace the original mirror plate material,designing a special mirror plate hoisting and flipping process,using a grinding table for fine grinding treatment,and establishing a strict regular maintenance and inspection system.After the implementation of these technical transformation and maintenance strategies,the electric erosion of the mirror plate of the Guang unit in Siyang Station has been effectively controlled,the quality requirements of the mirror plate working face have been improved,and the insulation resistance between the mirror plate and the thrust head is higher than 40 MΩ.The resistance between the guide bush and the back of the bush is higher than 50 MΩ,and meets the design roughness requirements.Generally speaking,the solution proposed in this study provides a valuable reference case for the prevention and control of mirror plate erosion in similar water conservancy projects.