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Apparatus and methods for installing, removing and adjusting an inner turbine shell section relative to an outer turbine shell section

United States Patent

May 1, 2001
View the Complete Patent at the US Patent & Trademark Office
A turbine includes upper and lower inner shell sections mounting the nozzles and shrouds and which inner shell is supported by pins secured to a surrounding outer shell. To disassemble the turbine for access to the inner shell sections and rotor, an alignment fixture is secured to the lower outer shell section and has pins engaging the inner shell section. To disassemble the turbine, the inner shell weight is transferred to the lower outer shell section via the alignment fixture and cradle pins. Roller assemblies are inserted through access openings vacated by support pins to permit rotation of the lower inner shell section out of and into the lower outer shell section during disassembly and assembly. The alignment fixture includes adjusting rods for adjusting the inner shell axially, vertically, laterally and about a lateral axis. A roller over-cage is provided to rotate the inner shell and a dummy shell to facilitate assembly and disassembly in the field.
Leach; David (Niskayuna, NY), Bergendahl; Peter Allen (Scotia, NY), Waldo; Stuart Forrest (Salem, NC), Smith; Robert Leroy (Milford, OH), Phelps; Robert Kim (Milford, OH)
General Electric Co. (Schenectady, NY)
09/ 311,642
May 14, 1999
The Government of the United States of America has rights in this invention pursuant to COOPERATIVE AGREEMENT NO. DE-FC21-95MC31176 awarded by the U.S. Department of Energy.