Peshko V. Establishing control over the residual resource of high-temperature elements of steam turbines

The thesis is devoted to solving the issue of establishing control over the resource of high-temperature elements of high-power steam turbines by means of technological, constructive, schematic and regime methods. Estimated determination of the residual service life-time of steam turbines with a capacity of 100, 200, 300, 800 MW, which constitute the main park of the equipment of TPP of Ukraine is done. The service life-time of the turbine casing for supercritical parameters with taking into account the efforts of tightening the studs is determined for the first time. Proposed and justified the effectiveness of the resource control method by changing the tightening forces. The effectiveness of changing sealing steam supply scheme and reconstruction of the thermocompensational grooves of steam turbines are investigated. The influence of the operation of 200-300 MW units in the regime of frequent start-ups on the accident rate, service life-time and economic indicators is determined. The resource control method by changing the mode of maneuvering operation of power units is proposed.