Last-stage moving blade of industrial steam turbine
The utility model discloses a last-stage moving blade of an industrial steam turbine. The last-stage moving blade of the industrial steam turbine comprises a blade tip, a blade body and a blade root from top to bottom. The blade tip, the blade body and the blade root are of an integrally formed stru...
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Sprache: | eng |
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Zusammenfassung: | The utility model discloses a last-stage moving blade of an industrial steam turbine. The last-stage moving blade of the industrial steam turbine comprises a blade tip, a blade body and a blade root from top to bottom. The blade tip, the blade body and the blade root are of an integrally formed structure. The blade tip is provided with a shroud ring. The molded line of the blade is in a variable-cross-section twisted shape. The blade root is a covered double-inverted-T-shaped blade root. Laser alloying is conducted on the top of the molded line part of the blade root, so that the water erosion resistance of the outer surface of the steam inlet edge of the end of the blade body is improved, and therefore the safety of the blade body is improved. The portion, close to the molded line of the blade, of the shroud ring is a conical surface, the portion, close to the molded line of the blade, of the blade root is a cylindrical surface, and therefore it is guaranteed that smooth connection is achieved at the circumferential joint after adjacent blades are assembled into a set; in this way, the flowing characteristic of a steam channel is improved, and the overall efficiency of the industrial steam turbine is guaranteed. |
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