高水头抽水蓄能机组主轴密封型式对比分析

Comparative analysis of main shaft seal types for high-head pumped storage unit

当前高水头抽水蓄能电厂水泵水轮机常用的主轴密封型式主要有自补偿式轴向密封和自补偿径向密封。本文分别介绍上述两种密封结构特点、工作原理并进行对比分析及总结。同时,根据设计理论及检修经验对两种类型主轴密封检修维护分别给出了建议。

At present, self-compensating axial seal and self-compensating radial seal are commonly used as main shaft seals for pump turbine of high-head pumped storage power station. This paper introduces these two seals in terms of structural features and operating principle, makes corresponding comparative analysis and summary, and gives suggestions on the maintenance of these two main shaft seals according to design theory and maintenance experience.