Turbine casing

摘要

A casing includes an inner shell and an outer shell that surrounds the inner shell and comprises a plurality of inflection points. An annular flange is between the inner shell and the outer shell, and a plurality of joints attach the inner shell to the annular flange. A connector is between the annular flange and the outer shell at each of the plurality of inflection points. A method for assembling a casing includes joining a plurality of curved sections to one another to generally define an arcuate inner shell and surrounding the arcuate inner shell with an outer shell. The method further includes attaching the arcuate inner shell to an annular flange at first attachment points and connecting the annular flange to the outer shell at second attachment points spaced approximately equidistantly from the first attachment points.

主权项

1. A turbine casing comprising:
at least three casing sections, each of said at least three casing sections defining a curved shape and having a first end and a second end, wherein, said first and second ends of said at least three casing sections are configured to abut such that said at least three casing sections define a substantially circular shape; an outer shell surrounding the at least three casing sections, wherein the outer shell comprises a plurality of inflection points; an annular flange between the first inner shell and the outer shell; a plurality of joints, wherein each of the plurality of joints has a first portion and a second portion and the first portion of each of the plurality of joints is attached to at least two of the at least three casing sections and the second portion of each of the plurality of joints is attached to the annular flange by a mechanical device; and a connector between the annular flange and the outer shell at each of the plurality of inflection points.