OUTLET BRANCH PIPE FOR STEAM TURBINE AND METHOD TO REDUCE OUTPUT LOSSES IN OUTLET BRANCH PIPE OF STEAM TURBINE Russian patent published in 2015 - IPC F01D25/30 F01D25/12 

FIELD: machine building.

SUBSTANCE: outlet branch pipe (110) of a steam turbine (10) comprises lower outlet branch pipe (105), a steam guide (24), a condenser hole (26), a plate (200) of the outlet branch pipe and an inner channel. The lower outlet branch pipe (105) is connected to the steam turbine (10). The steam guide (24) is mounted in the lower outlet branch pipe (105) and is designed to guide a waste steam flow (35) from the blades (14) of the last stage of the steam turbine (10) casing. The condenser hole (26) is set below the lower outlet branch pipe (105) and is designed to receive the waste steam flow (35) from the above branch pipe (105). The branch pipe plate (200) is mounted in the lower outlet branch pipe (105) and is designed to guide a waste steam flow (35) from the axial direction to the radial one to the condenser hole (26). The inner channel (215) is located in the outlet branch pipe plate (200) and is designed to guide a heat carrier flow inside it as well as to cool and condense the waste steam flow (35) near the plate (200).

EFFECT: improved turbine characteristics due to the condensation in the zone with low velocities near the outlet branch pipe plate (200) providing for reduced boundary layer and improved flow passing through the said branch pipe.

9 cl, 4 dwg