Patent ID: 6648332
Filing Date: 2003-11-18
Classification: F01D,F16J

Abstract:
A steam turbine comprising:axially spaced turbine sections about a common rotor operable at different pressures; an outer shell about the differential pressure sections and the rotor; a packing casing intermediate said differential pressure sections and connected to said shell, said packing casing separating differential pressure regions on axially opposite sides of the packing casing; said packing casing being formed of at least a pair of arcuate shells having circumferentially registering endfaces joined one to the other forming at least one joint therebetween and between said shell and said rotor; registering grooves in said joint endfaces; and a spline seal extending in said registering grooves and sealing between the differential pressure regions on opposite axial sides of the packing casing at said joint.