液压与气动2025，Vol.49Issue(3)：43-49,7.DOI:10.11832/j.issn.1000-4858.2025.03.006
转子偏心状态下分布式轴封密封特性数值模拟
Numerical Simulation of Sealing Characteristics of Distributed Shaft Seals in Eccentric Rotor State
摘要
Abstract
The steam turbine at a power plant exhibited an increase in rotor eccentricity and serious leakage after prolonged operation,resulting in a significant decline in efficiency.This research proposes a distributed steam curtain self-sealing system to address the issue by employing multiple independent steam sealing modules.The steam flow characteristics and sealing effectiveness of the system are analyzed using numerical simulation.The results show that a steam pressure of 200 Pa represents the minimum threshold for ensuring effective sealing.Supplying steam at multiple positions can guarantee the sealing effect and reduce the proportion of air in the mixed gas to 10-6.When the pressure reaches or exceeds 20 kPa,supplying steam at any position can meet the sealing requirements;however,the steam consumption will increase by 13.6%.This research also discusses the single-side supplying steam on sealing effect,which can lead up to a 40.5%saving in steam.关键词
汽轮机/轴端密封/转子偏心/分布式控制Key words
steam turbine/shaft-end seal/rotor eccentricity/distributed control分类
机械工程引用本文复制引用
卢刚,李成宝,武伟,江晓然,于升旭,胡建军..转子偏心状态下分布式轴封密封特性数值模拟[J].液压与气动,2025,49(3):43-49,7.基金项目
国家自然科学基金(51641508) （51641508）
中国华能集团有限公司技术开发及应用项目(2024-GP16-61) （2024-GP16-61）
