FIELD: machine building.
SUBSTANCE: invention relates to power engineering and can be used in humid-steam turbines or in the final stages of condensing steam turbines. In compliance with this invention, a number of turbine blade edges extend, by an equal size, beyond the front disk end face, as seen along the working fluid flow, within the limits of axial clearance between the diaphragm and the blade, the said blades with extending edges being arranged uniformly along the disk circumference. Note here that the number of the blades with the said extending edges makes 3 to 7% of the total number of blades, the size of the edge part extending towards the diaphragm makes 0.1 to 0.3 of the axial clearance between the diaphragm and the blade, while their width makes 0.2 to 0.4 of the turbine blade edge.
EFFECT: humid-steam turbine stage longer life, simpler design.
2 dwg
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