MOVABLE BLADE FOR TURBOMACHINE Russian patent published in 2016 - IPC F01D5/22 

FIELD: turbo-machines.

SUBSTANCE: movable blade of turbomachine includes a platform, as well as inlet and outlet sealing protrusions extending radially outward from platform. Platforms forms an outer surface for passage for gas and has first and second opposite lateral edges. Each of first and second side edges between inlet and outlet protrusions has Z-shaped profile, having a first segment near inlet protrusion, intermediate second segment and third segment near outlet protrusion. First and third segments are parallel to each other, and second segment extends in an inclined manner between first and second segments. On lateral side of first side edge there is first outward protruding collar extending along second segment of first side edge and not connected with inlet or outlet protrusions. On lateral side of second side edge there is a second outward protruding collar having an outlet section and an inlet section. Outlet section of second collar is connected to outlet protrusion and extends along second and third segments of second side edge. Inlet section of second collar continues outlet section to inlet protrusion and is located behind relative to first segment of second side edge. Another invention of group relates to a turbomachine including said blade.

EFFECT: group of invention reduces stress on blade due to alignment of centre of gravity of platform with centre of gravity of upper section of aerofoil profile.

4 cl, 3 dwg