Plural shell axial turbine for operation with high pressure, high temperature steam

Claim 1

Axial turbine for operation with high pressure, high temperature steam, comprising a pot-shaped housing having inlet and outlet means for the steam, the location of the steam inlet means in the axial direction of the housing being adjacent one side of the housing and the steam outlet means in the axial direction of the housing being adjacent the other side of the housing, a shaft, the shaft being mounted in the housing coaxially therewith for rotation therein, a packing housing for the shaft, said packing housing being mounted around the coaxially therewith in the pot-shaped housing adjacent the inlet side of the pot-shaped housing, and means for carrying guide vanes, said guide vane carrying means being integral with the packing housing and extending toward the other end of the potshaped housing, the guide vane carrying means and the packing housing forming an inner shell within the pot-shaped housing, said inner shell being integral in the axial direction of the housing and divided in a plane of the housing axis, a radially inwardly extending shoulder formed in the pot-shaped housing adjacent the steam outlet side thereof, said shoulder abutting and radially supporting the inner shell but permitting axial movement of the inner shell, radially outwardly extending projections formed adjacent the steam inlet side of the potshaped housing on the shaft packing housing portion of the inner shell, axial slots formed in the pot-shaped housing adjacent the projections, radially inwardly extending shoulders formed in the pot-shaped housing adjacent the slots, the projections being received in the slots and abutting against the shoulders, whereby the projections, shoulders and slots fix the inner shell adjacent the steam inlet side of the pot-shaped housing both radially and axially.