Turbine shroud and blade tip arrangement with abrasive surface and manufacturing method therefor

A tip of rotor blade which rotates is an abradable surface (14). An inner wall of a shroud (20) as a jacket for the rotor blade is an abrasive surface (23). Apart of an abrasive particle (13) protrudes from the abradable surface (14). When the tip of the rotor blade which rotates contacts the inner...

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Bibliographische Detailangaben
Hauptverfasser:	KUNITAKE, NOBUHIRO, OHARA, MINORU
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION ENGINE PLANTS IN GENERAL GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING INDEXING SCHEME FOR ASPECTS RELATING TONON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES ORJET-PROPULSION PLANTS INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUSSUBCLASSES OF CLASSES F01-F04 LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES STEAM ENGINES TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE WEAPONS
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Beschreibung
Zusammenfassung:	A tip of rotor blade which rotates is an abradable surface (14). An inner wall of a shroud (20) as a jacket for the rotor blade is an abrasive surface (23). Apart of an abrasive particle (13) protrudes from the abradable surface (14). When the tip of the rotor blade which rotates contacts the inner wall of the shroud, the protruding section (13a) of the abrasive particle slides with the abrasive surface (23) so as to be ground. By doing this, a turbine which can maintain an appropriate clearance between the rotor blade and the shroud and can be used for a long period under high-temperature conditions with easy restoration and remaking thereof.