After the overhaul and commissioning of the No. 4 generator of Shajiao A Power Plant, there was a hydrogen leakage problem in the radial conductive screw of the rotor. After analysis, the cause of the hydrogen leakage was the problem of the matching of the axial lead and the screw hole inside the conductive screw, which destroyed the sealing structure in static state, making the sealing ring seal poor in cold state and causing hydrogen leakage. Finally, treatment suggestions were put forward.
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