TURBINE ROTOR FOR THERMAL POWER PLANT Russian patent published in 2017 - IPC F01D5/22 F01D5/30 

FIELD: turbines.

SUBSTANCE: described is low-pressure turbine rotor for thermal power plant. Disc (3) is attached to shaft (4) and made with possibility of rotation around reference axis (Δ), wherein disc (3) has first contact surface (5). Each of multiple blades (6) represents high elongated blade and has at least one feather (7) and at least two ends (8, 9). Lower end (8) is attached to shank (10), having second contact surface (11), made with possibility of interaction with disc (3) first contact surface (5). Upper end (9) is attached to flange (12), having, at least, one first end (13) and one second end (14). Blades (6) flanges (12) together form, at blades installation, cylindrical structure, arranged coaxially with reference axis (Δ). Disc (3) first contact surface (5) has slits (15), which are coaxial relative to reference axis (Δ), parallel to each other and have substantially same radius (R₁₅). Second contact surface (11) of each blade (6) has projections (16), oriented along length of said blade (6) and interacting with, at least, part of slits (15). Each of first (5) and second (11) contact surfaces has rows axial through holes (17), which are aligned at interaction of said first (5) and second (11) contact surfaces with each other and into which pins are installed. Each of flanges (12) has main flat surface (18) at its first (13) and second (14) ends, oriented, substantially, radially. Main flat surface (18) forms angle (α) with plane (P_⊥), orthogonal to reference axis (Δ). Said angle (α), read counter clockwise one blade flange top view and opposite to each of blades (6) twisting direction (T) at rotor rotation, ranges from 20 to 50°.

EFFECT: enabling possibility to limit pressure in contact area at nominal rotation speed, while simultaneously maintaining simplicity of said blades installation on rotor disc at assembly.

9 cl, 6 dwg