Turbine casing unit

Abstract

To provide a turbine casing unit which is suppressed in thermal deformation.SOLUTION: A turbine casing unit 7 comprises: a turbine casing including a lower half casing 30 and an upper half casing 40 each of which houses a turbine rotor; and a support base 60 supporting the turbine casing. The turbine casing includes a pair of upper protruded arms 58 protruded from the upper half casing to one side in the axial direction, of the turbine rotor, and arranged side by side across the turbine rotor in plan view. The support base includes a pair of upper support surfaces 71 supporting the pair of upper protruded arms, respectively. Each of the upper support surfaces has a support inclined surface which is inclined in such a manner that support inclined surface becomes lower as extending to one side in the axial direction.SELECTED DRAWING: Figure 4

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