BLADE FOR TURBOMACHINE, COMPRISING AERODYNAMIC PART, METHOD OF MAKING SUCH BLADE AND TURBOMACHINE COMPRISING SUCH BLADES Russian patent published in 2019 - IPC F01D5/14 

FIELD: machine building.

SUBSTANCE: stator blade for a steam turbine includes an aerodynamic part which extends in a longitudinal direction for a certain length and has a first end and a second end. Aerodynamic part is limited on sides by aerodynamic surface and has inner cavity extending along entire length and confined by curvilinear surface. From the outer surface of the aerodynamic part to the inner surface of the said part there pass holes and/or slots designed for removal of condensate. Distance between aerodynamic and curvilinear surfaces changes along these surfaces. During manufacture of a stator blade of a steam turbine, at least one external and/or internal surface of the aerodynamic part is obtained by machining at an electroerosive cutting machine. Another invention of the group relates to a steam turbine comprising the above stator vanes.

EFFECT: group of inventions allows reducing erosion of the blade.

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