OUTLET UNIT FOR AXIAL STEAM TURBINE Russian patent published in 2015 - IPC F01D25/30 

FIELD: machine building.

SUBSTANCE: outlet unit (100) of an axial steam turbine comprises an inner turbine casing (116) and a turbine condenser (140) installed downstream the outlet housing (121). The outlet housing (121) comprises an upper outlet housing (122) and a lower outlet housing (123) and provides for a double outlet path (180, 190) to the turbine condenser (140). A backing bell mouth (145) and annular guides (140) for steam confine the above double outlet path (180, 190). The first outlet path (180) passes through the lower diffuser section (151) to the lower outlet housing (123) and then essentially down to the condenser (140). The upper outlet housing (122) is communicated with the upper diffuser section (152) in a flow-through manner. A radial channel (170) of the outlet unit (121) is communicated in a flow-through manner with the upper outlet housing (122) and the downstream turbine condenser (140). The second outlet path (190) passes through the upper diffuser section (152) into the upper outlet housing (122), then in axial direction to the radial channel (170) having the upper space located between the dividing wall (165) of the outlet housing (121) and the end face wall (172) of the diffuser, and then down through the radial channel (170) to the turbine condenser (140).

EFFECT: reduced flow swirling in the upper outlet housing thus improving the performance of the housing.

10 cl, 9 dwg