METHOD OF INSPECTING TIGHTNESS OF TURBINE SHROUD SECTION

Notches are placed between adjacent shroud portions of integrally shrouded rotating blades of a steam turbine forming a turbine rotor blade row generally 90 DEG apart and a predetermined wedging force is applied to each notch to wedge adjacent shroud segments apart, the width of the gap formed is me...

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Bibliographische Detailangaben
1. Verfasser:	BOBII REI KERAA
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING ENGINE PLANTS IN GENERAL HEATING INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES LIGHTING MACHINES OR ENGINES IN GENERAL MEASURING MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES PHYSICS STEAM ENGINES TESTING WEAPONS
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Beschreibung
Zusammenfassung:	Notches are placed between adjacent shroud portions of integrally shrouded rotating blades of a steam turbine forming a turbine rotor blade row generally 90 DEG apart and a predetermined wedging force is applied to each notch to wedge adjacent shroud segments apart, the width of the gap formed is measured, recorded and compared with future measurements made after the turbine has been in service to determine wear on the shroud portions; also, a wedging force is applied to open a gap at each notch to receive a predetermined sized shim, the wedging force is relieved clamping the shim in the gap and then generally increased until the shim can be pulled from the gap by hand, the wedging force at which the shim can be pulled is recorded and compared with future similar recordings after the rotor has been in service to provide an indication of wear on the shroud portions.