水布垭电厂调速器液压控制管路密封问题分析

Analysis on Sealing Problem of the Hydraulic Control Pipeline for Governor in Shuibuya Hydropower Plant

液压控制管路是水电厂调速器的重要组成部分,其密封可靠性直接影响机组运行的稳定性和经济性。通过对水布垭电厂液控管路接头密封结构和工作原理的研究表明,卡套式管接头因其结构简单、使用方便、无需焊接等特点而得到广泛应用,但若忽视对其材料、制造、检验、安装、维护、检查等方面的管理,就很容易引起渗漏;同时,配管及安装精度、管路振动、温差变化、反复拆装等也都会引起渗漏。

Hydraulic control pipeline is an important part of the governor in hydropower plants.Its sealing reliability directly affects the operation stability and economy of the unit.Taking Shuibuya Hydropower Plant as an example,the joint sealing structure and its working principles of the hydraulic control pipeline of governor are analyzed.It shows that the tube fitting joint is widely used because of its simple structure,convenience and welding-free characteristics.However,if the management of its material,manufacturing,inspection,installation,maintenance and checking is ignored,leakage problem is commonly encountered.Leakage can be also caused by the pipeline installation accuracy,pipeline vibration,temperature variation and repeated disassembly.