Turbine with a double casing

摘要

A turbine 10 that includes a rotor 12, an inner turbine shell 14, an outer turbine shell 16, and a sliding engagement 38 between the inner turbine shell 14 and the outer turbine shell 16. The inner turbine shell 14 may be a single piece construction that completely surrounds at least a portion of the rotor 12, and the outer turbine shell 16 surrounds the inner turbine shell 14. A method for aligning turbine 10 components that includes aligning a single-piece inner turbine 14 shell substantially concentric with a rotor 12 and surrounding the single-piece inner turbine shell 14 with an outer turbine shell 16. The method further includes supporting the single-piece inner turbine shell 14 with respect to the outer turbine shell 16 using a bearing assembly 38 between the single-piece inner turbine shell 14 and the outer turbine shell 16.