FIELD: gas-turbine plants.
SUBSTANCE: invention relates to the impeller of a turbine of a gas-turbine plant. Each foot of the impeller side in the turbine impeller is formed in such a way that the bottom surface of the second groove is continuous with the bottom surfaces of the first grooves that are adjacent to it. The shape of the outer contour of each foot of the side of the impeller, when viewed in the axial direction, is a shape in which a section of a specific shape is replaced by straight sections along pre-defined straight lines. The specific shape includes a preset range of the shape of the outer contour of the fastener, when viewed in the axial direction. The section is located at least radially on the inner side of the bottom surface of the second groove and is located on the outer side in the circumferential direction of the pre-defined straight lines. The preset straight lines pass through the central axis and points within the range along the specific shape from the intersection with the bottom surface of the second groove to the vertices of the teeth of the impeller side adjacent on the radially inner side to the bottom surface of the second groove.
EFFECT: creation of a turbine impeller is achieved, which can suppress the occurrence of residual tensile stresses due to contact with the turbine rotor blades during assembly or disassembly, while suppressing the local occurrence of excessive loads on the fixing wire during rotation of the turbine rotor.
7 cl, 10 dwg
