Method of servicing a turbine

Details Method of servicing a turbine Method of servicing a turbine

2005-08-18

2009-11-17

Cozart, Jermie E (Department: 3726)

Metal working

Method of mechanical manufacture

Impeller making

C029S402030, C029S452000, C029S525010, C029S525110

Reexamination Certificate

active

07617602

ABSTRACT:
The temporary fastening system for joining upper and lower shell casings of a turbine to one another for maintenance purposes includes a stud
ut tensioning system employed in lieu of the conventional studs and nuts. Once the turbine is opened up and the inner shell and rotor removed, the upper and lower shell casings are temporarily secured to one another using studs received in registering openings in the horizontal flanges of the upper and lower shell casings and retainer plates serving as a stop for the stud
ut tensioning system. The tensioning system is hydraulically operated and avoids torsional force on the temporary studs. Once measurements are made, the turbine is again reopened and reassembled using the initially removed bolts or a third set of bolts to secure the upper and lower shell casings to one another.

REFERENCES:
patent: 970274 (1910-09-01), Spencer
patent: 4567649 (1986-02-01), Ades et al.
patent: 5252029 (1993-10-01), Barnes
patent: 5542984 (1996-08-01), Krajicek
patent: 6224332 (2001-05-01), Leach et al.
patent: 6685406 (2004-02-01), Whitney et al.
patent: 2237102 (1975-03-01), None
patent: 59196911 (1984-11-01), None

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