A METHOD OF MEASURING JOINT GAPS AND RESTORING SAME

The method of the present invention uses a combination of gap measurement methods to map the gap in a joint in a high pressure vessel such as a steam turbine or steam valve. An exposed and supported surface is hydraulically balanced allowing any twisting of the surface to be removed. The map is then...

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Bibliographische Detailangaben
Hauptverfasser:	ZURAT, CRAIG JOSEPH, DANIELS, JOHN FRANCIS, COYLE, LAWRENCE JAMES, TENCZA, STEPHEN JOHN, SCHARTNER, CLETUS LYNCH, MORRIS, JOHN L, BERRONG, DAVID BRUCE, KETTERER, PHILIP WILKES, MARRON, GERALD IRVING, PARKER, CLIFFORD TERANCE, MCGETTIGAN, JOHN JOSEPH, KING, FREDDIE GEORGE, CUPO, RONALD PETER
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BLASTING COMBINED OPERATIONS CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROLLING ENGINE PLANTS IN GENERAL FUNCTIONAL ELEMENTS OF SUCH SYSTEMS HEATING LIGHTING MACHINE TOOLS MACHINES OR ENGINES IN GENERAL MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS MECHANICAL ENGINEERING METAL-WORKING NOT OTHERWISE PROVIDED FOR MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES OTHER WORKING OF METAL PERFORMING OPERATIONS PHYSICS REGULATING STEAM ENGINES TESTING TRANSPORTING UNIVERSAL MACHINE TOOLS WEAPONS
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Beschreibung
Zusammenfassung:	The method of the present invention uses a combination of gap measurement methods to map the gap in a joint in a high pressure vessel such as a steam turbine or steam valve. An exposed and supported surface is hydraulically balanced allowing any twisting of the surface to be removed. The map is then created using a blue contact method, feeler gages, deformable gap measuring medium and laser profiling for both surfaces of the joint. A restoration plan is produced using the map which minimizes the restoration work and produces matching joint surfaces. The joint surfaces are welded and/or machined and finally finished in accordance with the plan. A laser can be used to guide or reference the machine tool. Matching joint surfaces, especially if relatively flat, provide a better high pressure seal than relatively flat surfaces that do not match while relatively flat surfaces that do match produce an even better seal.