Discussion on Maintenance of Four Typical Sealing Pads of Large Generating Units

The paper analyzes structures of four typical ring-type sealing pads of hydrogen-cooling generators,and comprehensively compares abrasion and deformation of sealing pads,abrasion and harm of the journal,difficulty of dismounting and maintenance,and clearance adjustment.Aiming at different characteristics of sealing pads,the paper proposes relevant maintenance strategies.