| 摘要 |
FIELD: machine building.SUBSTANCE: axial gas turbine comprises a rotor and a stator. The stator is a case embracing the rotor from outside to form a hot gas path in-between through which the hot gas produced in the combustion chamber flows. The rotor comprises a shaft with axial grooves, in particular, of fir-tree type, to fix a great number of working blades in them in the form of sequential rows of working blades. Heat shields of the rotor are installed between the adjacent working blade rows and thus the inner border of the hot gas path is formed. The rotor shaft can transport the cooling air mainstream flow in the axial direction along the heat shields of the rotor and lower parts of the working blades. The rotor shaft provides the working blades with cooling air coming to the inner cavity of the working blades. The axial gas turbine is provided with leakproof channels for cooling air which pass in axial direction via the rotor shaft separately from the cooling air mainstream flow and supply the working blades with cooling air.EFFECT: reduced cooling air leakages and increased efficiency of turbine operation.13 cl, 9 dwg |
