Method for estimating erosion of steam turbine rotor blade using concentration of substance in feed water
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsShigeki Senoo, Soichiro Tabata, Tetsuya Sawatsubashi
Life of this patent
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Abstract
An erosion estimation method is for estimating a degree of progress of erosion of a last-stage rotor blade of a steam turbine. The erosion estimation method includes: sampling supplied water containing a substance to be detected, which is included in a material constituting the last-stage rotor blade, from a water supply line that is connected to the steam turbine; measuring a concentration of the substance; and estimating the degree of progress of the erosion of the last-stage rotor blade based on the concentration of the substance.
Claims6
An erosion estimation method for estimating a degree of progress of erosion of a final stage rotor blade of a steam turbine, the erosion estimation method comprising:
- sampling feed water including a substance to be detected that is included in a material forming the final stage rotor blade from a water supply line connected to the steam turbine;
- measuring a concentration of the substance to be detected in the feed water that has been sampled;
- and
- estimating the degree of progress of the erosion based on the concentration of the substance to be detected,
- wherein, in the estimating of the degree of progress of the erosion, it is estimated to which time an initial time or a transition period in which the erosion rapidly progresses relative to the initial time after a lapse of the initial time or a stable period in which a slope of the degree of progress of the erosion is gentle relative to the transition period after a lapse of the transition period the degree of progress of the erosion corresponds from an amount of change in the substance to be detected over time.
Dependencies are inferred from the claim text.