TURBOMACHINE BLADE Russian patent published in 2013 - IPC F01D5/18 

FIELD: machine building.

SUBSTANCE: turbomachine blade includes a gas-dynamic profile restricted with convex and concave external surfaces, a channel along the leading edge for cooling air, which is connected via inlet channels through a distributing header to a feed channel and outlet channels with convex external surface of the blade. Inlet and outlet channels are made tangentially relative to the cooling air channel. The blade is equipped with a tubular element with a supply channel connected to an additional feed channel and discharge channels made in inserts and in the leading edge of the blade. Tubular element is installed inside the cooling air channel with a gap relative to its inner wall. Inserts are installed between inner wall of the cooling air channel and tubular element on the side of incoming flow in the sector with central angle (α), 0≤α<180° from longitudinal axis of the blade profile.

EFFECT: invention allows considerable improvement of cooling efficiency of convex external leading edge and the whole blade, reduction of temperature gradients in different sections of the blade, reduction of thermal stresses and increase in the blade life.

4 cl, 2 dwg