Research of the TC and the SSS of the high pressure rotor of the steam turbine T-250/300-240 taking into account the results of repair and restoration works; estimation of low cycle and static wear, as well as residual resource; comparison of cyclic damage, residual working time and CHP rotor life before and after repair and restoration works, taking into account the adjusted stock ratios. The object of the study is to extend the life of the steam turbine T-250/300-240. The subject of the study is the assessment of low cycle and static wear, thermal and stress-strain state, damage, residual life of the CHP rotor of the steam turbine T-250/300-240, taking into account structural changes and circuitry. The scientific novelty of the obtained results consists in solving, on the basis of settlement research, the actual problem of managing the resource of energy equipment, namely: improved determination of the thermal and stress-deformed state of the CHP rotor of the steam turbine T-250/300-240; The evaluation of low cycle and static tiredness and the formulated proposals for increasing the reliability of the work of RHP; the evaluation and comparison of the residual resource before and after structural changes with the account of the adjusted stock factors is improved. The practical significance of the results obtained includes the calculated data regarding the TC, SSS and the residual life of the turbine T-250/300-240 at the Kyiv TPP-5 PJSC, taking into account the actual operating conditions and the results of the repair work, and the recommendations are based on the possibility of continuing the operation of the turbine.
Read full abstract