FIELD: machine building.
SUBSTANCE: invention relates to the field of mechanical engineering, namely to fan blades with a damper for damping vibrations, including long hollow wide-chord fan blades. Turbine fan blade consists of a base, a metal shell forming a trough, a back and a leading edge, and load-bearing power elements installed in the cavity within the metal casing, and damping material. Blade has an end plug with which the load-bearing power elements are rigidly connected, intermediate partitions are installed between the base and the end plug, through the holes in which the load-bearing power elements pass, and the damping material is placed in the cavity between the intermediate partitions and the end plug and the intermediate partition and is made in the form of honeycombs filled with hollow aluminosilicate microspheres, load-bearing power element located closer to the leading edge is made in the form of a metal tube filled with aluminosilicate hollow microspheres. Tube can be made elliptical in cross section. Dampers can be installed in the holes of the intermediate partitions. Load-bearing power elements can be pre-tensioned. Load-bearing power elements can have rectangular cross-section. Load-bearing power elements can have circular cross-section. Change in the percentage composition of titanium and aluminum can be made discretely. Change in the percentage composition of titanium and aluminum can be made continuously. Load-bearing power elements can have rectangular cross-section. Load-bearing power elements can have circular cross-section. Load-bearing power elements can be have quadrangular cross-section, with the two walls repeating the internal profile of the shell sections in contact with them.
EFFECT: increase in impact and vibration strength.
6 cl, 16 dwg
