MANUFACTURING METHOD OF MULTI-LAYER BLADE OF TURBOMACHINE Russian patent published in 2012 - IPC F04D29/38 B23P15/04 F01D5/18 

FIELD: machine building.

SUBSTANCE: at manufacture of hollow blade there formed are elements of the blade back and trough of set of plates located at equal distance to the profile of formed element; besides, after the specified profile and sizes are given to the plates, they are fixed and connected to each other by means of permanent connection. Then, back and trough elements are fixed so that the specified profile and sizes of the blade are provided and connected to each other in non-detachable manner. Blade back and trough elements are connected to each other through additional metal elements forming the leading and trailing edges of the blade, which correspond to profile and sizes of leading and trailing edges of the blade and have the cavities providing the conjugated connection to the blade back and trough elements.

EFFECT: invention allows improving erosion resistance of the blade, as well as reducing the forces required for formation of the blade back and trough elements.

24 cl, 3 dwg