洪屏抽蓄电站推力瓦瓦温过高原因分析与处理

Analysis and Treatment on High Temperature of Thrust Bearing Pads for Hongping Storage Hydropower Plant

江西洪屏电站装机4台300MW的抽水蓄能机组在启动调试期间均出现了推力瓦瓦温过高的现象,这使得推力瓦存在烧瓦的风险,从而威胁机组的安全稳定运行。为此,从设计、制造与安装三方面分析了推力瓦瓦温过高的原因,发现推力轴承结构设计存在不足,最终通过增大推力瓦外径、换用金属弹簧簇支撑和优化推力瓦进油边等措施使得推力瓦瓦温大幅降低,且满足合同保证值要求,成功解决了洪屏电站机组推力瓦瓦温过高的问题。

Jiangxi Hongping hydropower plant was equipped with four pump turbine-generator motor units. The ca- pacity of each unit was 300 MW. It was found that the temperature of thrust bearing pads were excessive high in each u- hit＇s start-up test period, which may cause damage to thrust bearing pads, so it was a big menace to the safety running of unit. Therefore, a detail analysis was conducted from three aspects of design, manufacture and installation, and it was found that the structure design of thrust hearing was imperfect. Finally, the increase of outer bearing diameter, using steel spring columns for mattress support and optimization of pad chamfers were adopted as the main changes of the thrust hearing. As a result, the temperature of thrust bearing pads decreased significantly and satisfied the requirement of guarantee value of contract. The problem of excessive high temperature of thrust bearing pads was successfully solved.