压缩空气储能透平机组轴封系统设计OA

To meet the specific sealing requirements of compressed air energy storage(CAES)turbine units,a novel shaft seal system scheme was designed.The specific design was as follows:by analyzing the characteristics of the air medium and the operational features of the unit,a scheme combining isolation air and a buffer chamber was designed to address the issue of high-temperature air leakage,which could effectively reduce the leakage temperature.A passive direct-discharge structure was adopted to control shaft seal leakage,and the chimney effect was used to create a micro-negative pressure seal.The layout of the valve stem leakage pipeline was optimized to achieve partial working fluid recovery.Simultaneously,recommendations for staged flow velocity control and pipeline slope were proposed.These measures effectively improved the overall efficiency of the unit.The research findings can provide reference for the shaft seal design of CAES turbine units.