Investigation of the Resource Indicators of the Intermediate Pressure Rotor of the K-200-130 Turbine

The paper is devoted to the study of the medium-pressure rotor of the K-200-130 turbine, which has exhausted its park life of 220 thousand hours and 800 starts, namely, the prediction of the durability of this equipment and the extension of its operation beyond the park life. A geometrical model of the most loaded part of the rotor was developed - from the middle of the shaft neck in the area of the thrust bearing to the 5th stage disc. The main study area was the 13th stage fillet on the 14th stage side. The reason for studying this zone is that it is the most loaded zone according to the authors' experience and similar studies. The analysis of the steel condition showed that when operating in a typical semi-basic operating mode, the accumulated damage in the rotor metal due to cyclic fracture mechanisms is 27 %. The static damage is 49 %. Thus, the total metal damage is 76 %, which sets the residual service life of the medium-pressure rotor of the K-200-130 turbine unit at 63300 hours.