BLADE FOR TURBOMACHINE IMPELLER, AREA OF TURBOMACHINE NOZZLE BLOCK, IMPELLER AND TURBOMACHINE Russian patent published in 2013 - IPC F01D5/14 

FIELD: machine building.

SUBSTANCE: blade of a turbomachine impeller comprises an aerofoil section with a trough, a back, rear and front edges, and also a shelf stretching from one of ends of the aerofoil perpendicularly to its longitudinal direction. The blade together with many identical blades forms a ring. Aerofoil sections of the ring are installed radially. Adjacent shelves of the blades are combined in pairs to form a continuous surface between their aerofoil sections, connecting the trough of the aerofoil section with the back of the adjacent aerofoil section. The specified surface in the upper half of the aerofoil section along the flow comprises a ledge located closer to the trough than to the back and a sunk channel arranged between it and the trough. The ledge is separated from the trough by means of the specified sunk channel. Other inventions of the group relate to the area of the turbomachine nozzle block and to the impeller comprising the above blades. Another invention relates to a turbomachine comprising the specified impeller.

EFFECT: invention makes it possible to reduce losses in a blade to blade channel without significant increase of cost in manufacturing of a turbomachine.

12 cl, 6 dwg