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Reasons for erosion of the turbine rear steam seal and mid-plane

2022-04-18View Original

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Hangzhou Steam Turbine experiences leakage at the mid-plane of the rear cylinder during normal operation. The negative pressure is currently normal. Inspection revealed severe cylinder erosion; after sealing the leak with metal putty, leakage resumed after just one week of operation. May I ask what the cause of erosion is? The steam supply to the shaft seal is set at a very low level, which meets the design requirements.

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