抽水蓄能电站甩负荷工况顶盖座环连接螺栓强度计算方法探讨
Discussion on the Strength Calculation Method for Connecting Bolts Between Head Cover and Stay Ring of Pumped Storage Power Station in Load Rejection
莫亚波 1周祥 1张新 2李成军 2胡坤 1陈顺义 2汪德楼2
作者信息
- 1. 华东宜兴抽水蓄能有限公司,江苏省宜兴市 214000
- 2. 中国电建集团华东勘测设计研究院有限公司,浙江省杭州市 311122;浙江省抽水蓄能工程技术研究中心,浙江省杭州市 311122
- 折叠
摘要
抽水蓄能电站机组启动频繁、运行工况复杂,国内外出现过多次顶盖座环连接螺栓断裂失效,发生水淹厂房的事故,影响了人员和财产安全.甩负荷工况为顶盖螺栓计算中的控制性工况之一,该工况下顶盖荷载的准确计算直接关系到螺栓强度计算的结果.本文通过某抽水蓄能电站顶盖和座环连接螺栓强度复核计算的实例,对计算方法等进行了探讨,提出了以现场实测数据为基础,进行CFD(计算流体力学)计算,并进行相应修正的方法.该方法兼顾了计算的时长和准确性,具备一定的工程实用性,可供行业参考.
Abstract
The units of pumped storage power plants are frequently started and operate under complex modes.There have been many incidents of bolt breakage and failure of the head cover and stay ring connection at home and abroad,resulting in flooding of the plants,affecting the safety of personnel and property.The load rejection mode is one of the controlling modes in the calculation of head cover bolts,and the accurate calculation of head cover load in this mode is directly related to the results of bolt strength calculation.This article explores the calculation method and proposes a CFD(Computational Fluid Dynamics)calculation method based on on-site measured data and result correction through an example of the strength review calculation of the head cover and stay ring connecting bolts of a pumped storage power station.The method in this article takes into account both the calculation time and accuracy,and has certain engineering practicality,which can be used as a reference for the industry.
关键词
连接螺栓/甩负荷/顶盖荷载/强度/顶盖/座环Key words
connecting bolts/load rejection/head cover load/strength/head cover/stay ring引用本文复制引用
基金项目
国网新源集团有限公司科技项目(SGXYKJ-2021-019)
出版年
2024
NETL
NSTL
万方数据