What are the main reasons for the increase in the axial displacement of a turbine?
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The main reasons for the increase in the axial displacement of the turbine are: (1) a decrease in steam temperature and pressure, overload in the flow passage, and the shutdown of the regenerative heater. (2) The steam leakage due to wear increases the gap in the diaphragm shaft seal. (3) Poor steam quality causes scaling in the flow passages. (4) Water impact occurs. (5) Overloading of the turbine: Generally, the axial thrust of a condensing turbine increases as the load increases ； For extraction or back-pressure turbines, the maximum axial thrust may occur at an intermediate load. (6) Damage to the thrust bearing.
(1) The steam temperature and pressure drop, causing overload in certain sections of the flow or a reduction in the extraction steam from some regenerative sections； (2) Excessive drop in condenser vacuum ； (3) Increased steam leakage due to wear in the diaphragm shaft seal gap ； (4) Poor steam quality, resulting in scaling in the flow passages: (5) In the event of a water hammer incident.